QOU245VH_技术文档

QOU Miniature Circuit

Breakers and Switches

Unit Mount (Cable-in/Cable-out)

Class 720

Catalog

September

2005

CONTENTS

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page

Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 12

UL Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 17

Circuit Breaker Tripping Characteristics (Trip Curves) . . . . . . . . . . . page 19

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 28

QYU One-Pole 277 Vac Supplementary Protectors. . . . . . . . . . . . . page 30

QOU Miniature Circuit Breakers and Switches

Application Information

APPLICATION INFORMATION

QOU Miniature Circuit Breaker Types

Miniature molded case circuit breakers are intended for use in residential and commercial applications.

They are tested and listed according to UL Standard 489 and CSA Standard C22.2 No. 5-02 for

molded case circuit breakers and enclosures.

QOU miniature circuit breakers are unit-mount (lug/lug) thermal-magnetic circuit breakers which:

•

Provide a means to manually open a circuit.

Automatically open a circuit under overload or short circuit conditions.

•

Feature common tripping of all poles.

Have a Visi-Trip^®trip indicator.

Can be flush-, surface-, or DIN rail-mounted.

Has lugs at both ends (cable-in/cable-out construction)

Operate in any position.

Are fully tested, UL Listed, and CSA certified for reverse connection without restrictive line/load

markings.

Non-automatic Switches

QOU non-automatic switches are intended for use as disconnect devices only. UL Standard 489

requires switches to be protected by a thermal-magnetic circuit breaker (or fuse) of equivalent rating.

QOU switches are UL Listed for use on circuits capable of delivering not more than 10,000 amperes

when protected by an equivalent rated circuit breaker or fuse. QOU switches contain no automatic

tripping mechanisms and do not provide overcurrent protection.

Description

QOU miniature circuit breakers and switches are available for surface-, flush-, or DIN rail mounted

applications in one-, two-, and three-pole constructions. QOU miniature circuit breakers are used for

overcurrent protection and switching on both ac and dc electrical systems. QOU circuit breakers and

switches measure 0.75 in. (19 mm) wide per pole. Two- and three-pole circuit breakers are both

equipped with an internal crossbar for common tripping of all poles. QOU switches are available in

one-pole, 60 ampere and two- and three-pole, 60, 100 and 125 ampere construction.

Cases for QOU miniature circuit breakers and switches are constructed of a glass-reinforced insulating

material that provides high dielectric strength. Current carrying components are isolated from the

handle. The handle position indicates whether the circuit breaker is off, on or tripped.

Applications

One-pole QOU miniature circuit breakers rated 120/240 Vac are UL Listed for use on 120/240 Vac

single-phase, three-wire or 208Y/120 Vac three-phase, four-wire electrical systems.

Two-pole QOU circuit breakers rated 120/240 Vac are UL Listed for use on 120/240 Vac single-phase,

three-wire or 208Y/120 Vac three-phase, four-wire electrical systems. They cannot be used on 240

Vac delta systems. Use QOU-H two-pole circuit breakers rated 240 Vac on 240 Vac delta and 240 Vac

single-phase, two wire systems.

Three-pole QOU circuit breakers rated 240 Vac are UL Listed for use on any system where the maximum

phase-to-phase or phase-to-ground voltage is 240 Vac or less.

For application information on other systems, contact your local field office

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QOU Miniature Circuit Breakers and Switches

Application Information

Table 1:

Rating

Selection Data

Catalog Number

One-Pole

Two-Pole

240 Vac

Three-Pole

240 Vac

Terminal

Lug Wire

Size (AWG)

120/240 Vac

22K AIR

10K AIR

22K AIR

10 K AIR

10K AIR

10 A

15 A

20A

QOU110

QOU115*

QOU115HM*

QOU120*

QOU120HM*

QOU125*

QOU130*

QOU135*

QOU140*

QOU145*

QOU150*

QOU160*

QOU170*

—

QOU115VH

—

QOU210

QOU215*

—

QOU310

QOU315*

—

QOU215H*

QOU215VH

QOU220VH

†

—

QOU120VH

—

QOU220*

—

QOU220H*

QOU320*

—

20 A

25 A

30 A

35 A

40 A

45 A

50 A

60 A

70 A

80 A

90 A

100 A

125 A

—

QOU125VH

QOU130VH

QOU135VH

QOU140VH

QOU145VH

QOU150VH

QOU160VH

—

QOU225*

QOU230*

QOU235*

QOU240*

QOU245*

QOU250*

QOU260*

QOU270*

QOU225H*

QOU225VH

QOU230VH

QOU235VH

QOU240VH

QOU245VH

QOU250VH

QOU260VH

—

QOU325*

QOU330*

QOU335*

QOU340*

QOU345*

QOU350*

QOU360*

1—#14–#2

Cu or Al

QOU230H*

—

‡

—

QOU370

‡

QOU180

—

QOU280

—

QOU380

1—#12–#2/0

Cu or Al

‡

QOU190

—

QOU290

—

QOU390

‡

QOU1100

—

QOU2100

—

QOU3100

‡

—

QOU2125

—

QOU200

QOU300

1—#14–#2

Switch—60 Amperes Max.—240 Vac

Switch—100 Amperes Max.—240 Vac

Switch—125 Amperes Max.—240 Vac

‡

QOU2000

QOU3000

1—#12–#2/0

‡

QOU20001

QOU30001

* UL Listed as HACR type for use with heating, air conditioning and refrigeration equipment containing motor-group combinations

and marked for use with HACR type circuit breakers.

†

High-magnetic trip circuit breakers. Recommended for applications where high initial inrush current can occur and for individual

dimmer applications.

‡

Available as Series 1 with forward box lugs only. (No optional terminations)

Tripping Mechanisms

A tripping mechanism is an assembly within the circuit breaker molded case that causes the circuit

breaker to open automatically under sustained overload or short circuit conditions.

The tripping mechanisms in two- and three-pole circuit breakers operate such that an overcurrent on

any pole of the circuit breaker will cause all poles of the circuit breaker to open simultaneously.

Thermal and magnetic factory calibration (with current) is performed on each pole of every Square D

circuit breaker.

These mechanisms operate to trip the circuit breaker:

•

Thermal trip

Magnetic trip

Optional shunt trip accessory (see Accessories, page 12)

The sensing system is an integral part of a thermal-magnetic circuit breaker. The sensing system

continually monitors current flowing through the circuit breaker. It detects abnormal current conditions

and, depending on the magnitude of the current, initiates an inverse-time or an instantaneous tripping

response. This action causes the tripping mechanism to open the circuit breaker contacts and interrupt

current flow. The speed of the tripping process must be controllable and inversely matched to the

severity of the overcurrent. QOU miniature circuit breakers have an over-center toggle mechanism for

quick-make, quick-break action with positive handle indication. The handle assumes a position

between ON (I) and OFF (O) when the circuit breaker has tripped.

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QOU Miniature Circuit Breakers and Switches

Application Information

Thermal Trip

The thermal trip element of a circuit breaker is a root-mean-squared (rms) current sensing device. The

thermal element, or bimetal, is constructed from metals with dissimilar rates of expansion bonded

together. The thermal element responds to overloads by reacting to the heat generated both by the

current flowing through the circuit breaker and by the heat contribution from ambient conditions. The

bending force of the bimetal causes the circuit breaker to trip (see Figure 1). The deflection of the

bimetal is predictable as a function of current and time. This is the inverse time tripping characteristic of

the thermal element, i.e., the tripping time decreases as the magnitude of the current increases.

Square D calibrates the thermal elements and they are not field-adjustable. The thermal trip elements

are calibrated for 40° C (104° F) ambient temperature, per UL Standard 489 and CSA Standard C22.2

No. 5-02.

Circuit Breaker

Latch

Contacts

Bimetal

Current Out

Current In

Spring

Normal Conditions

Thermal Trip

Figure 1:

Thermal Tripping

Magnetic Trip

The magnetic (instantaneous) trip element uses an electromagnetic assembly to trip the circuit breaker

instantaneously (with no intentional delay) at or above a predetermined current value. During a short

circuit of sufficient magnitude, the high-level current passing through the conductor rapidly increases

the magnetic field of the electromagnet that attracts the armature. As the armature is drawn toward the

electromagnet, it initiates an unlatching action and opens the circuit breaker contact (see Figure 2).

Circuit Breaker

Contacts

Latch

Current Out

Spring

Conductor

Armature

Electromagnet

Current In

Normal Conditions

Figure 2:

Magnetic Tripping

Trip Indicator

When the QOU miniature circuit breaker is tripped, the handle assumes a position between ON (I) and

OFF (O) and the red Visi-Trip^®indicator (A) appears in a window in the circuit breaker case. Reset the

circuit breaker and Visi-Trip indicator by pushing the handle to OFF and then to ON.

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QOU Miniature Circuit Breakers and Switches

Application Information

Line and Load Connections

QOU miniature circuit breakers are supplied with two types of lug configuration as standard, depending

on the continuous current rating:

•

10–70 ampere one- and two-pole; reversible lugs

10–60 ampere three-pole; reversible lugs

Other ampere ratings; forward lugs only

The box-type lugs supplied on QOU miniature circuit breakers are UL Listed and CSA certified to

accept solid or stranded, aluminum or copper conductors These lugs are UL Listed to be used with

wire rated at 140° F, 167° F and 194° F (60° C, 75° C and 90° C), sized according to the NEC 176° F

(75° C) temperature rating. See the Accessories section for more information on terminations.

Optional terminations, such as quick connectors, are also available. See the Accessories section for

more information on terminations.

Ring-tongue terminals can be factory ordered using the following catalog number designations:

•

QOU_ _ _3100 (ring-tongue terminal wired from front)

QOUR_ _ _5283 (ring-tongue terminal wired from rear)

Mounting Provisions

QOU miniature circuit breakers are supplied with mounting brackets for both line and load side

support. Mounting brackets are field installable and can be attached to the front or back of the circuit

breaker molded case. See the Accessories section for more information on mounting brackets.

Tapped mounting feet can be ordered using the catalog number designation QOU_ _ _3100.

All QOU miniature circuit breakers also come equipped with slots in the molded case for DIN rail

mounting.

These miniature circuit breakers are designed for use with a standard 35 mm DIN mounting rail

(DIN/EU 50 022, 0.30 x 1.38 in. [7.5 mm x 35 mm]).

Standards

Square D brand QOU miniature circuit breakers are manufactured and tested according to the

following standards:

•

UL Standard 489 (File E84967)

NEMA Standard AB1

Canadian Standards Association CSA C22.2 No. 5-02

IEC 60947-2

CE

Square D brand QOU non-automatic switches comply with:

•

UL Standard 489

Canadian Standards Association CSA C22.2 No. 5-02

NOTE: Circuit breakers are to be applied by guidelines detailed in the NEC and other applicable

electrical codes.

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QOU Miniature Circuit Breakers and Switches

Application Information

Catalog Numbers

Square D brand circuit breakers are ordered by a catalog number that includes the circuit breaker

family, description, number of poles, amperage rating and suffix.

Table 2: Catalog Numbers

Typical Catalog Number:

QO

U

2

30

H

2100

QO Miniature Circuit Breaker Family

Description

U – Unit Mounted (Lugs on Both Ends)

No. of Poles

1 – 1-pole

2 – 2-pole

3 – 3-pole

Ampere Rating

10–125 Ampere Rating

00 = 60 A, 000 = 100 A, and 0001 - 125 A QOU Switch

Rating

1- and 2-pole

2-pole

3-pole

No Letter-Standard 120/240 Vac Rating

VH - 22,000 AIR

No Letter - 240 Vac Rating

VH - 22,000 AIR

H-240 Vac Rating

Suffix

XXX (i.e., 2100) - Indicates Factory-installed Accessory (See page 12)

Ratings for QOU Miniature Circuit Breakers

When designing an electrical distribution system, overcurrent protective devices are generally selected

based on performance requirements. Factors influencing this selection include system voltage,

continuous current, interrupting rating and frequency.

QOU circuit breakers are selected by their ratings. A circuit breaker’s rating must meet or exceed the

parameters of the electrical system on which they are used.

Voltage Rating

A circuit breaker can be rated for alternating current (ac) or direct current (dc) or both. The established

voltage rating of a circuit breaker is based on design parameters such as clearance of current carrying

parts and dielectric withstand tests both through air and over surfaces. Voltage ratings indicate the

maximum voltage for the electrical system on which the circuit breaker can be applied.

The circuit breaker must have a voltage rating greater than or equal to the system voltage. When a

circuit breaker clears an overcurrent, it does so in two steps: First, the current sensing system

identifies the overcurrent and releases the tripping mechanism. This results in a parting of the

contacts. Then the circuit breaker must extinguish the voltage arc across the contacts. If the circuit

breaker has the correct voltage rating, it can efficiently extinguish this voltage arc. QOU miniature

circuit breakers are rated in the following UL 489 voltages, as shown in Table 3:

•

120/240 Vac

240 Vac

48 Vdc

60 Vdc

277 Vac for QYU, UL 1077 recognized supplementary protector only (not a branch circuit breaker)

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QOU Miniature Circuit Breakers and Switches

Application Information

Interrupting Rating

The interrupting rating of a circuit breaker is the highest current at rated voltage that the circuit breaker

is intended to interrupt under standard test conditions. Circuit breakers must be chosen with

interrupting ratings equal to or greater than the maximum available short-circuit current at the point

where the circuit breaker is applied in the system (See Table 3).

Table 3:

Interrupting Rating

UL Listed Interrupting Rating—RMS Sym. Amperes

Circuit

Breaker

Type

No. of

Poles

Ampere

Rating

AC Volts

240

NA

DC Volts¹

120/240

NA

277

5 kA

NA

48

60

10–30

10–70

80–100

10–70

80–125

10–70

80–100

15–30

15–60

1

10 kA

NA

5 kA

NA

5 kA

NA

QOU

NA

5 kA

NA

2

3

NA

5 kA

NA

10 kA

NA

5 kA

NA

5 kA

NA

QOU-H

2

NA

5 kA

QOU-VH

22 kA

NA

NA = Not Applicable

1

DC ratings do not apply to circuit breakers rated for 10 A

Continuous Current Rating

The continuous current rating of a circuit breaker is defined by the National Electrical Manufacturers

Association (NEMA) as: “The maximum direct current or rms current, in amperes, at rated frequency

which a device or assembly will carry continuously without exceeding the specified limits of observable

temperature rise.” Sometimes referred to as the ampere rating or handle rating of the circuit breaker,

the continuous current rating relates to the system current flow under normal conditions.

UL Standard 489 states that circuit breakers must carry 100% of their continuous current rating

indefinitely (without tripping) at 104° F (40° C) in free air. QOU circuit breakers should be applied, per

the NEC, to carry 80% of their continuous current ratings in the intended enclosure. The continuous

current rating is indicated on the handle of each circuit breaker. See Table 1.

Switching Duty

The switching duty (SWD) listing applies only to 15 A and 20 A circuit breakers rated at 277 Vac or

less. The circuit breakers are subjected to specified temperature rise tests at predetermined periods

during the endurance operations.

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QOU Miniature Circuit Breakers and Switches

Application Information

UL HACR Type

HACR is an acronym that designates circuit breakers certified to be used on heating, air conditioning,

and refrigeration loads. The 9th edition of UL489 eliminated special testing requirements for HACR

certification, and the 2005 NEC eliminated the requirement for special HACR marking. HACR marking

is no longer necessary for circuit breakers used in these applications in states and localities where the

2005 NEC has been adopted.

QOU circuit breakers will continue to carry the HACR marking to meet the rquirements of previous

NEC Sections 430 and 440 in areas where the 2005 NEC has not yet been adopted. In older versions

of the NEC, Article 430-53(c) required that each circuit breaker must be of the inverse time type, and

be approved for group installation. The 2005 NEC eliminated the group installation clause of this

article.

The following QOU miniature circuit breakers will continue to carry the HACR label:

•

10–100 A, one-pole

10–125 A, two-pole

10–100 A, three-pole

High Magnetic

QOU-HM circuit breakers are recommended for area lighting (athletic fields, parking lots, outdoor

signs, etc.) when using lamps of inherent high inrush current or individual dimmer applications, or other

applications where high inrush current exceeds standard tripping conditions. These circuit breakers

are available in 15 A and 20 A only.

QOU-HM circuit breakers are manufactured with the magnetic trip point calibrated at a much higher

level than standard QOU circuit breakers. Table 4 lists the magnetic trip levels to which high-magnetic

circuit breakers are calibrated:

Table 4:

QOU-HM Circuit Breaker Magnetic Trip Levels

QOU-HM Circuit

Breakers

Max. Full-Cycle Magnetic Hold Level

15 A

20 A

21–35 x In

16–26 x In

315–525 A

322–537 A

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QOU Miniature Circuit Breakers and Switches

Application Information

Ambient Temperature Rating

To meet the requirements of UL 489 and the Canadian Standards Association, thermal-magnetic

circuit breakers are designed, built and calibrated for use on 50/60 Hz ac systems in a 104° F (40° C)

ambient temperature. Time/current characteristic trip curves are drawn from actual test data that meets

UL 489 testing requirements.

The ambient temperature is the temperature of the air surrounding the circuit breaker. Thermal-

magnetic circuit breakers are temperature-sensitive devices, and their rated continuous current

carrying capacity is based on a UL specified 104° F (40° C) calibration temperature. The ambient

temperature can affect the performance characteristics of the circuit breaker. Thus, when applying a

circuit breaker at temperatures other than 104° F (40° C), it is necessary to determine the circuit

breaker’s actual current carrying capacity under this condition. Further, it may be necessary to rerate

the circuit breaker to compensate for these ambient conditions. See Figure 3:

Thermal-magnetic circuit breakers use bimetal strips that bend in response to temperature changes.

Current flowing through the circuit breaker creates most of the heat that causes the tripping action. The

ambient temperature surrounding the circuit breaker either adds to or subtracts from this available

heat. Conductors are sized using the ampacity rerating factors shown on the bottom of NEC Table

310-16 when designing systems for ambient temperatures other than 40° C.

Rerating of Thermal-magnetic Circuit Breakers for Ambient Conditions

Square D thermal-magnetic circuit breakers are to be applied in ambient temperatures within the range

of 14° F to 140° F (-10° C to 60° C). Use the following rerating guidelines:

•

Ambient Temperatures Between 77° F and 104° F (25° C and 40° C):

— No rerating is necessary.

•

Ambient Temperatures Between 14° F and 75° F (-10° C and 24° C):

— Thermal-magnetic circuit breakers operating within this ambient temperature range will carry

more than their continuous current rating without tripping. Conductor and equipment damage

can result if they are not in the same low ambient environment as the circuit breaker.

— Nuisance tripping will not be a problem. However, if closer protection of the equipment and

conductor is required, the increased current carrying capacity of the circuit breaker at the lower

ambient temperature should be taken into consideration.

•

Ambient Temperatures Between 106° F and 140° F (41° C and 60° C):

— Thermal-magnetic circuit breakers operating within this ambient temperature range will carry

less than their continuous current rating and must be carefully selected to prevent nuisance

tripping.

To determine the continuous current carrying capacity of a thermal-magnetic circuit breaker at an

ambient temperature other than 104° F (40° C), perform the following steps:

1. Choose the ambient rerating curve in Figure 3 for the specific amperage rating of the circuit breaker

you wish to apply. Note that the curve crosses the 104° F (40° C) ambient temperature line at the

circuit breaker’s rated continuous current carrying capacity (Circuit Breaker Handle Rating on the

curve).

2. Follow this curve to the appropriate ambient temperature.

3. Read the adjusted continuous current carrying capacity at this point (on the left axis).

4. Add in any other applicable factors, such as continuous loading, per the NEC requirement.

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QOU Miniature Circuit Breakers and Switches

Application Information

For example, Figure 3 shows the ambient rerating curves for QOU miniature

circuit breakers. What is the continuous current capacity of a 80 A circuit

breaker applied at 104° F (40° C)? A 90 A circuit breaker at 50° F (10° C)?

Figure 3:

Ambient Rerating of QOU Circuit

Breaker

By finding 40° C on the horizontal axis and reading up to the 80 A curve, you

find that the circuit breaker will carry 80 A, which is its rated current carrying

capacity. If the circuit breaker will be used on a continuous load (defined as

three hours or more), Section 210-20(a) of the 2005 NEC requires that

loading not exceed 80% of the rating. Here, 80 A x .80 = 64 A.

160

150

140

Locate 50° F (10° C) on the horizontal axis and move straight up to the 90 A

curve. The circuit breaker will carry 110 A. Again, if the circuit is used on a

continuous load, it must be applied at 80% of its rating. In this example the

equation is 110 A x .80 = 88 A.

130

120

110

125 A

110 A

As explained in Section 210-20(a) of the NEC:

100

90

80

70

60

“Where a branch circuit supplies continuous loads or any combination of

continuous and noncontinuous loads, the rating of the overcurrent

device shall not be less than the noncontinuous load plus 125 percent of

the continuous load.

100 A

90 A

“Exception: Where the assembly, including the overcurrent devices

protecting the branch circuit(s), is listed for operation at 100 percent of

its rating, the ampere rating of the overcurrent device shall be permitted

to be not less than the sum of the continuous load plus the

noncontinuous load.”

80 A

70 A

60 A

50

40

30

20

50 A

45 A

40 A

Frequency Rating

30 A

The standard-rated frequency for circuit breakers is 60 Hz, but Square D

circuit breakers can be applied on 50 Hz systems without thermal or

magnetic rerating. Other frequencies can affect the thermal, magnetic and

short-circuit tripping characteristics of circuit breakers.

20 A

15 A

10 A

10

Applying thermal-magnetic circuit breakers at frequencies above 50/60 Hz

requires special consideration of the effects of high frequency on circuit

breaker tripping characteristics. Thermal and magnetic operations must be

treated separately.

-10

(14) (32)

0

20

(68)

40

(104)

60

(140)

˚C

(˚F)

Ambient Temperature

Thermal Tripping Performance at High Frequency

At frequencies below 60 Hz, the thermal rerating of thermal-magnetic circuit

breakers is negligible. However, at frequencies above 60 Hz, thermal

rerating is required. High-frequency operation causes abnormal heat rise in

the current-carrying parts because of the skin effect.

Figure 4:

Frequency Rerating of QOU

Circuit Breaker at 400 Hz

1.0

.9

One of the most common high-frequency applications is at 400 Hz. Figure 4

indicates the thermal rerating multiplier to be used with each circuit breaker

family when applied on 400 Hz systems.

When applying a 100 A QOU circuit breaker on a 400 Hz system, the circuit

breaker’s current carrying capacity is as follows:

.8

QO,

QOU

.7

•

Non-continuous Loads (less than three hours): Using Figure 4, the QOU

circuit breaker may be applied at .78 of rating, or 78 A.

•

Continuous Loads (three hours of more): NEC Article 210-20(a) requires

that standard circuit breaker loading does not exceed 80% of the circuit

breaker’s rating when used for continuous loads. Therefore, the current-

carrying capacity of a 100 A QOU circuit breaker operating under

continuous load at 400 Hz would be 100 A x .78 x .80 = 62 A.

.6

.5

0

100

200

300

Current Rating in Amperes

.

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QOU Miniature Circuit Breakers and Switches

Application Information

Interrupting Rating (AIR) at 400 Hz.

At frequencies above 60 Hz, the interrupting rating of thermal-magnetic circuit breakers is less than the

60 Hz interrupting rating. Unless specifically marked for use of 400 Hz systems, the interrupting rating

of Square D circuit breakers is reduced to 1/10th of the 60 Hz interrupting rating.

Magnetic Tripping Performance

At frequencies above 60 Hz more current is necessary to magnetically trip a circuit breaker than at 60

Hz. Fig. 3 shows the multipliers of 60 Hz current that it takes to instantaneously trip a circuit breaker

when applied at various frequencies. For example, at 60 Hz, it takes 700 A or more to magnetically trip

a 100 A QOU circuit breaker per trip curve 730-7 (page 26). At 400 Hz, it takes 1820 A (2.6 multiplier)

or more to magnetically trip the same circuit breaker.

Figure 5:

60 Hz Current Multiplier

20

15

10

9

8

7

6

5

4

3

2

1.5

1

Line Frequency in Hertz

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QOU Miniature Circuit Breakers and Switches

Accessories

ACCESSORIES

Factory-installed Accessories

QOU circuit breakers and QYU supplementary protectors can be supplied with electrical accessories

factory-installed. Available factory-installed accessories are shown in Table 5 below. Each QOU circuit

breaker or QYU supplementary protector can be equipped with only one (1) factory-installed electrical

accessory from the table below. These devices cannot be added, modified or removed once

assembled. All electrical accessories occupy one additional pole space, 3/4 in. (19.05 mm). The proper

suffix number must be added to the circuit breaker catalog number to order an accessory.

Table 5:

Factory-installed Accessories

Accessory

Description

Volts, 50/60 Hz

Coil Burden, VA

Catalog Suffix

12 ac/dc

24 ac/dc

60

Used for tripping the

circuit breaker

1042

168

electrically using a

remote control source.

Includes coil clearing

contact.

Shunt Trip

120 Vac

208 Vac

240 Vac

72

228

288

1021

Auxiliary Switch “A”

Contact

One contact only; opens when circuit breaker is OFF or tripped;

5 A max. at 120 Vac, 50/60 Hz

1200

1201

Auxiliary Switch “B”

Contact

One contact only; closed when circuit breaker is OFF or tripped;

5 A max. at 120 Vac, 50/60 Hz

One contact only; closed when circuit breaker is tripped; open when circuit

breaker is ON or OFF;

5 A max. at 120 Vac, 50/60 Hz

Alarm Switch

2100

5283

Factory-installed ring tongue terminal, 10-32 screw, for 1-, 2-, and 3-pole

QOU 10–60 A

Ring-tongue Terminal

Wire Binding Screw

Mounting Foot

Hex drive 5/32 in. wire binding screw for QOU

5280

3100

Tapped mounting foot for QOU, 1- and 2-pole 10–70 A, 3-pole 10–60 A

Figure 6:

Shunt Trip Accessory

Shunt Trip

The shunt trip accessory is used to trip the circuit breaker from a remote

location by using a trip coil energized from a separate electrical source.

When energized by a push button or other pilot device, the shunt trip

causes the circuit breaker to trip. The handle moves to the tripped position

and the Visi-Trip indicator appears. The trip coil has a coil clearing contact

to break the coil circuit when the circuit breaker trips. Shunt trips operate at

75% or more of rated voltage. See the wiring diagram in Figure 6.

Coil Clearing Switch

(opens when circuit

breaker is shunt tripped)

Shunt Trip Housing

S

Accessory Terminals

Shunt Trip Coil

Circuit Breaker

12

09/2005

QOU Miniature Circuit Breakers and Switches

Accessories

Figure 7:

Auxiliary Switch Accessory

Auxiliary Switch

The auxiliary switch accessory monitors the circuit breaker contact status

and provides a remote signal indicating whether the circuit breaker

contacts are open or closed. When the circuit breaker is OFF or tripped, the

auxiliary switch with an “A” contact is open and the auxiliary switch with a

“B” contact is closed. When the circuit breaker is on, the auxiliary switch

with an “A” contact is closed and the auxiliary switch with a “B” contact is

open. See the wiring diagram in Figure 7.

Circuit Breaker ON

"A" Contact

"B" Contact

Circuit Breaker OFF or Tripped

"A" Contact

"B" Contact

Figure 8:

Alarm Switch Accessory

Alarm Switch

The alarm switch accessory monitors the circuit breaker trip status and is

used to provide a remote warning signal indicating that the circuit breaker

has tripped. This signal can be a horn, pilot light, or some other indicator.

The contact on the standard alarm switch is open when the circuit breaker is

in the off or on position and is closed when the circuit breaker is in the tripped

position.

Normally-open Alarm Switch

Circuit Breaker (Tripped)

Alarm switches are actuated when the circuit breaker has tripped as a result

of an overload, short circuit or shunt trip operation. See the wiring diagram

in Figure 8.

Circuit Breaker (OFF or ON)

13

09/2005

QOU Miniature Circuit Breakers and Switches

Accessories

Field-installed Accessories

Table 6:

Field-installed Accessories

Accessory

Description

Catalog Number

Ties two 1-pole circuit breakers together.

QO1HT

QO3HT

QO1LO

HLO1

Handle Tie

Ties three 1-pole circuit breakers together; includes lock-off for California Title 24.

Clamp for holding QOU single-pole handle in ON or OFF position.

Attaches to 1-, 2-, or 3-pole circuit breaker handles.

Handle Lock-off (Clamp)

For padlocking 1-pole circuit breaker in “OFF” or “ON” position. Attaches to circuit breaker escutcheon—Fixed QOU1PA

For padlocking 2- and 3-pole circuit breaker in “OFF” or “ON” position. Attaches to circuit breaker

escutcheon—Fixed

QOU1PL

For padlocking 1-pole circuit breaker in “OFF” position only

QOU1PAFLA

Handle Padlock Attachment

Mechanical Interlock

For padlocking 2- and 3-pole circuit breaker in “OFF” position only (1- and 2-pole 10–70 A, 3-pole 10–60 A)

One-pole circuit breakers. Attaches to circuit breaker handle—Removable

Two-and 3-pole circuit breakers. Attaches to circuit breaker handle—Removable

Interlocks two 2-pole or one 2-pole and one 1-pole QOU circuit breakers

QOU2PAFLA

QOHPL

QO1HPL

QO2DTILA

Mechanical Interlock with

Retaining Kit

For interlocking two adjacent back-fed circuit breakers in dual power supply applications. Interlocks two 2-pole

or one 2-pole and one 1-pole QOU circuit breakers.

QO2DTIM

QOUMF1

QOUMF2

QOUMF3

For mounting 1-, 2-, or 3-pole circuit breakers (Two mounting feet required per circuit breaker)

Mounting Feet

Tapped mounting foot for QOU, 1- and 2-pole 10–70 A, 3-pole 10–60 A (Two mounting feet required per pole) QOUMFS1

For forward or reverse wiring of 60 A maximum circuit breakers

For end connection wiring of 60 A maximum circuit breakers

For 10–70 A 1- and 2-pole 10–60 A 3-pole circuit breakers (Two covers required per pole)

For 80–100 A 1-, 2-, and 3-pole circuit breakers (Two covers required per pole)

4-pole jumper bar with front wiring, base, cover, and screw

4-pole jumper bar with wiring, base, cover, and screw to left

4-pole jumper bar with wiring, base, cover, and screw to right

4-pole, 100 A jumper bar base with front wiring

4-pole, 100 A jumper bar base with left-side wiring

4-pole, 100 A jumper bar base with right-side wiring

4-pole jumper bar cover

QOUFR

Quick Connectors

Finger Safe Cover

QOUEC

QOULFSC1

QOUHFSC1

QOU14100JBAF

QOU14100JBAL

QOU14100JBAR

QOU14100BAFB

QOU14100BALB

QOU14100BARB

QOU14100CAB

QOUQCMSB

QOU16150JBAF

QOU16150BAFB

QOU16150BALB

QOU16150BARB

QOU16150CAB

QOUCP2

Jumper Bars for 2-pole Low

Ampere QOUs

Mounting screw for jumper bar cover

6-pole jumper bar with front wiring, base, cover, and screw

6-pole, 150 A jumper bar base with front wiring

6-pole, 150 A jumper bar base with left-side wiring

6-pole, 150 A jumper bar base with right-side wiring

6-pole jumper bar cover

For one 2-pole circuit breaker

For one 3-pole circuit breaker

QOUCP3

Cover Plates

For two 2-pole circuit breakers

QOUCP4

For three 2-pole circuit breakers

QOUCP6

Vertical cover for 2- and 3-pole circuit breakers

Horizontal cover for 2-pole circuit breakers

BCV

Rainproof Cover

BCH

Ring Tongue Terminal

Adapter

For ring tongue terminal wiring of 60 A maximum circuit breakers

QOURT

14

09/2005

QOU Miniature Circuit Breakers and Switches

Accessories

Handle Tie

The handle tie accessory converts any adjacent 1-pole QOU circuit breaker

to one independent-trip multi-pole circuit breaker.

Handle Lock-off

HLO-1

QO1HT

QO1LO

Handle Lock-off

Handle Tie

Handle Lock-off

The handle lock-off accessories fasten the handle in the on or off position.

The mechanism will still be able to trip and open the contacts even if the

handle is held on. The handle lock-off cannot be padlocked.

Handle Padlock Attachment

QOU1PA

Padlock Attachment

The handle padlock attachments allow padlocking the circuit breaker

handles in the on or off position. The mechanism will still be able to trip and

open the contacts even if the handle is held on.

QO1HPL

Padlock Attachment

QOU1PL

Padlock Attachment

Mechanical Interlock Attachment

The mechanical interlock attachment locks the handles of two adjacent

circuit breakers to prevent both circuit breakers from being on at the same

time. Both circuit breakers may be switched to the off position with the

mechanical interlock in place. The mechanism will still be able to trip and

open the contacts even if the handle is held on.

QOU2DTILA

Mechanical Interlock Attachment

Mounting Feet

Mounting feet are available to mount 1-, 2-, and 3-pole circuit breakers. Two

brackets (two kits) are required to mount each circuit breaker.

Tapped Mounting Feet

QOUMF1

suffix -3100 or QOUMFSI

Mounting Foot

Tapped Mounting Foot

Tapped versions of the mounting feet are available to mount 1-, 2-, and 3-

pole circuit breakers. Two brackets (one kit) are required to mount each

circuit breaker.

Jumper Bars

For added wiring convenience, jumper bars are available for common

connections to two 2-pole or three 2-pole 60 A maximum QOU circuit

breakers. Jumper bars are available with front, left-side, or right-side wiring

bases and covers.

ON

Cover Plates

Jumper Bar

Base

OFF

Cover plates are available to fit one 2-pole, one 3-pole, two 2-pole, or three

2-pole circuit breakers. The cover plates fasten to the escutcheon and

provide 1 in. (25.4 mm) per pole finish trim to cover the circuit breaker.

Cover Plate

AC.

.

0

V

E

.

R

.

X

O

F

L S

A

E

B

A

N

M

CAUTION 24

MP

V

E

R

A

O

T

0

C

E

L

I

M

A

I

N

A

M

0C

M

10

R

0

T

G

E

I

141

L

G

I

N

U

F

L

E

L

O

A

S

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S

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T

I

N

Z

O. Q

4100B

1

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I

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O

Q

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R

A

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T. N

O

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3

Q

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LY

E

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EM

SS

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A

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IN

R

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SC

M

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B

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IT

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Jumper Bar

Cover

15

09/2005

QOU Miniature Circuit Breakers and Switches

Accessories

Finger Safe Covers

Finger safe covers are installed over the top of the terminal connections to

prevent accidental contact with energized parts. Two covers are required

per pole of each circuit breaker.

QOUHFSC1

High-amp Finger Safe Cover

QOULFSC1

Low-amp Finger Safe Cover

Rainproof Covers

Ring-tongue

Terminal Adapter

Rainproof Covers

Rainproof covers plates are available for vertical mounted 2- and 3-pole

circuit breakers and horizontal mounted 2-pole circuit breakers.

Ring-tongue Terminal Adapters

Ring-tongue terminal adapters are available for ring tongue terminal wiring

of 60 A maximum circuit breakers.

Reversible Lugs

For added wiring convenience, QOUR 10–70 A 1- and 2-pole, and 10–60 A

3-pole QOUR circuit breakers have reversible lugs. Removing the wire

binding screw allows the captive lug body to be rotated and the wire binding

screw reinstalled. This permits the circuit breaker to be flush mounted and

then conveniently wired from the back.

End Quick

Connector

Forward or Reverse

Quick Connector

Quick Connectors

In addition to the reversible lugs previously described, 10–70 A 1- and 2-

pole, and 10–60 A 3-pole A QOU circuit breakers have optional field

installable quick connectors.

Quick connectors provide a convenient way to attach two wires using two

standard, 0.25 in. insulated quick connectors per terminal (30 A maximum

per connector). Quick connectors are not furnished with the circuit breakers,

but are commercially available. Connectors suitable for wire sizes up to

AWG #10 can be selected for use with these circuit breakers.

Table 7:

Optional Terminations

Type

Wiring Method

Quantity

Catalog Number

Field-installed Quick Connectors

Forward or Reverse

End Connection

1

QOUFR

QOUEC

Factory-installed Quick Connectors

One each end of QOU for end connection

—

QOUQ prefix

Available only on 10–60 ampere circuit breakers.

16

09/2005

QOU Miniature Circuit Breakers and Switches

UL Requirements

UL REQUIREMENTS

A UL label on the QOU miniature circuit breaker indicates that the circuit breaker meets the

requirements of UL Standard 489 for molded case circuit breakers.

Underwriters Laboratories Inc. (UL), the Canadian Standards Association (CSA), the National Electrical

Manufacturers Association (NEMA), and the National Electrical Code (NEC) all define a circuit breaker as “a

device designed to open and close a circuit by non-automatic means and to open the circuit automatically at

a predetermined overcurrent without damage to itself when properly applied within its rating.”

A molded case circuit breaker is one “that is assembled as an integral unit in a supportive and

enclosing housing of insulated material.”

A UL label also means the production procedure is monitored by UL inspectors for continuing

conformance to UL performance requirements. These requirements are based on sound engineering

principles, research, records of test and field experience, and information gathered from users and

inspection authorities.

UL 489 and CSA 22.2 #5-02 Test Procedures

Limited Available Fault Current Tests

UL and CSA require a series of tests on a single set of sample circuit breakers for compliance with UL

Standard 489. The tests for thermal-magnetic circuit breakers are described below and conducted in

the order presented.

Since QOU switches are derivatives of QOU miniature circuit breakers,they do not have to go through

an overload test. They have to complete a withstand test (paragraph 11.1.7).

200% Thermal Calibration

Each pole of the circuit breaker must trip within a specified time limit when carrying 200% of its ampere

rating.

135% Thermal Calibration

With all poles connected in series, the circuit breaker must trip within a specified time limit when

carrying 135% of its ampere rating.

Overload

The circuit breaker is operated making and breaking 600% of its ampere rating, but not less than

150 A. For circuit breakers through 100 A, the number of 600% operations is 35 manual open and

close and 15 manual close and automatic open. For 125 A circuit breakers, the number of operations is

50 manual open and close.

Temperature Rise

While carrying 100% of rated current at a 104° F (40° C) ambient temperature and mounted in open

air, the circuit breaker is checked for temperature rise on a wiring terminal. The temperature rise must

not exceed a 122° F (50° C) rise above ambient temperature and must be within specified limits.

Endurance

The circuit breaker must successfully complete the number of switching operations shown in the table

below. One switching operation includes a motion to turn the circuit breaker on and a motion to turn the

circuit breaker off.

Table 8:

QOU Circuit Breaker Switching Operations

Amperes

Full Load Operations No Load Operations

0–100 A

125 A

6000

4000

17

09/2005

QOU Miniature Circuit Breakers and Switches

UL Requirements

Calibration Retest

Both the 200% and 135% thermal calibration tests are repeated.

Short Circuit

For circuit breakers rated 240 V, two short-circuit tests per pole and one test with all poles connected in

series are performed. For example, a three-pole circuit breaker receives seven short-circuit tests. For

circuit breakers rated 120/240 V, three tests are made with all poles connected in series. The circuit

breaker is connected to the test circuit using wire correctly sized for the rating of the circuit breaker.

The line leads are not more than 4 ft. (1.22 m) in length and the load leads are not more than 10 in.

(25.4 cm) in length.

NOTE: Successful testing requires that the current be interrupted while maintaining the integrity of all

conductors and connections.

Trip Out

The 200% thermal calibration test is repeated following the short-circuit tests.

Dielectric

The circuit breaker must withstand, for one minute, twice its rated voltage plus 1000 V:

•

Between line and load terminals with the circuit breaker open, that is, with the circuit breaker either

tripped or off.

•

Between terminals of opposite polarity with the circuit breaker open.

Between live parts and the overall enclosure with the circuit breaker both open and closed.

No conditioning of the circuit breaker can take place during or between tests. There also can be no

failure of functional parts at the conclusion of the sequences.

High Available Fault Current Tests

After qualifying a set of circuit breakers to the standard tests, a manufacturer can have additional

circuit breaker samples tested on higher than standard available fault currents.

The following performance requirements apply:

200% Thermal Calibration

Each pole of the circuit breaker must trip within a specified time limit when carrying 200% of its

continuous current rating.

Short Circuit

With the load side terminals connected by 10 in. (25.4 cm) lengths of specified wire, the circuit breaker

is exposed to a short-circuit current. After successful interruption, the circuit breaker is reset and

closed again on the short circuit. An additional short-circuit bus-connected test is required for frame

sizes or construction groups below 100 A.

Trip Out

Each pole of the circuit breaker must trip within a specified time limit when carrying 250% of its

continuous current rating.

Dielectric Withstand

The circuit breaker is subjected to twice its rated voltage, but not less than 900 V.

18

09/2005

QOU Miniature Circuit Breakers and Switches

Circuit Breaker Tripping Characteristics (Trip Curves)

CIRCUIT BREAKER TRIPPING CHARACTERISTICS (TRIP CURVES)

The tripping characteristics of thermal-magnetic circuit breakers are represented by a characteristic

tripping curve that plots tripping time versus current level. See page 20. The curve shows the amount

of time required for a circuit breaker to trip for overcurrent through the entire tripping range of the circuit

breaker. Manufacturing tolerances result in a curve that is a band bound by minimum and maximum

values of total clearing time. Total clearing time is the sum of the sensing time, unlatching time,

mechanical operating time, and arcing time of the circuit breaker. For currents in excess of 135 percent

of the circuit breaker rating at ambient temperature (40°C/104°F), the circuit breaker will automatically

open the circuit within limits specified by the band.

Thermal Tripping Characteristics

The upper left portion of the characteristic tripping curve displays the thermal response of the circuit

breaker. On overcurrent levels, up to the instantaneous tripping level, thermal tripping occurs when the

bimetal in the circuit breaker responds to the heat associated with the overcurrent. The bimetal

deflects, unlatching the mechanism and mechanically causing the circuit breaker to trip and open the

circuit. The larger the overcurrent, the faster the circuit breaker operates to open the circuit (inverse

time).

Magnetic (Instantaneous) Tripping Characteristics

The lower right portion of the characteristic tripping curve displays the magnetic (instantaneous)

tripping response of the circuit breaker. This takes place when overcurrents of sufficient magnitude

operate the magnetic tripping mechanism. Magnetic tripping occurs with no intentional delay.

19

09/2005

QOU Miniature Circuit Breakers and Switches

Tripping Curves

TRIPPING CURVES

Curve 730-1

MULTIPLES OF RATED CURRENT

10000

9000

8000

10000

9000

8000

7000

QO MOLDED CASE CIRCUIT BREAKERS

CHARACTERISTIC TRIP CURVE NO 730-1

7000

6000

5000

CIRCUIT BREAKER INFORMATION

5000

4000

Circuit Breaker

Prefix

Continuous

Ampere Rating

Maximum

AC Voltage

Number

of Poles

4000

3000

QO, QOU

QO, QO-EM

QO

10

120/240

240

1,2

3

3000

120/240

240

1

2

3

QO-K

120

1

2000

1500

2000

1500

QO-SWN

120

2

120/240

3

This curve is to be used for application and coordination purposes only. The

EZ-AMP overlay feature at the bottom of the page should be used during

coordination studies.

1000

900

800

1000

900

800

700

600

All time/current characteristic curve data is based on 40

˚C ambient cold start.

600

500

Terminations are made with conductors of appropriate length and ratings.

500

400

300

200

150

200

150

MAXIMUM SINGLE POLE TRIP TIMES AT 25¡C

BASED ON NEMA AB-2, 1980

100

90

100

90

80

70

80

70

60

50

60

50

40

30

40

30

20

15

20

15

10

9

10

9

8

7

8

7

6

5

6

5

4

3

4

3

2

1.5

1

.9

.8

.7

.8

.7

.6

.5

.6

.5

.4

.3

.4

.3

.2

.15

.1

.09

.08

.07

.08

.07

.06

.05

.06

.05

.04

.03

.04

.03

MAXIMUM CLEARING TIME

(AT 50 HZ)

(AT 60HZ)

.02

1 CYCLE

(50 HZ)

1 CYCLE

(60 HZ)

.015

1

.01

.009

.008

.01

.009

.008

₂CYCLE

(50 HZ)

1

2

CYCLE

(60 HZ)

.007

.006

.007

.006

.005

10

MULTIPLES OF RATED CURRENT

Curve No.0730TC8701

Drawing No. B48095-730-01

Copyright

20

09/2005

QOU Miniature Circuit Breakers and Switches

Tripping Curves

Curve 730-2

MULTIPLES OF RATED CURRENT

10000

9000

8000

10000

9000

8000

7000

QO MOLDED CASE CIRCUIT BREAKERS

CHARACTERISTIC TRIP CURVE NO 730-2

7000

6000

5000

CIRCUIT BREAKER INFORMATION

5000

4000

Circuit Breaker

Prefix

Continuous

Ampere Rating

Maximum

AC Voltage

Number

of Poles

4000

3000

QO-K

15

120

120/240

1

QO, QOU, QO-VH, QH

3000

2000

1500

2000

1500

This curve is to be used for application and coordination purposes only. The

EZ-AMP overlay feature at the bottom of the page should be used during

coordination studies.

All time/current characteristic curve data is based on 40˚C ambient cold start.

Terminations are made with conductors of appropriate length and ratings.

1000

900

1000

900

800

700

600

500

400

300

MAXIMUM SINGLE POLE TRIP TIMES AT 25¡C

BASED ON NEMA AB-2, 1980

300

200

150

200

150

100

90

100

90

80

70

80

70

60

50

60

50

40

30

40

30

20

15

20

15

10

9

10

9

8

7

8

7

6

5

6

5

4

3

4

3

2

1.5

1

.9

.8

.7

.8

.7

.6

.5

.6

.5

.4

.3

.4

.3

.2

.15

.1

.09

.08

.07

.08

.07

.06

.05

.06

.05

.04

.03

MAXIMUM CLEARING TIME

(AT 50 HZ)

(AT 60HZ)

.03

.02

1 CYCLE

(50 HZ)

1 CYCLE

(60 HZ)

.015

1

.01

.009

.008

.01

.009

.008

₂CYCLE

(50 HZ)

1

2

CYCLE

(60 HZ)

.007

.006

.007

.006

.005

15

Curve No.0730TC8702

Drawing No. B48095-730-02

MULTIPLES OF RATED CURRENT

Copyright

21

09/2005

QOU Miniature Circuit Breakers and Switches

Tripping Curves

Curve 730-3

MULTIPLES OF RATED CURRENT

10000

9000

8000

10000

9000

8000

7000

QO MOLDED CASE CIRCUIT BREAKERS

CHARACTERISTIC TRIP CURVE NO 730-3

7000

6000

5000

CIRCUIT BREAKER INFORMATION

5000

4000

Circuit Breaker

Prefix

Continuous

Ampere Rating

Maximum

AC Voltage

Number

of Poles

4000

3000

QO-K

QO, QOU, QO-VH, QH

QO-PL

20

120

120/240

240

1

1, 2

3

3000

QO-PL

2000

1500

2000

1500

This curve is to be used for application and coordination purposes only. The

EZ-AMP overlay feature at the bottom of the page should be used during

coordination studies.

All time/current characteristic curve data is based on 40˚C ambient cold start.

Terminations are made with conductors of appropriate length and ratings.

1000

900

1000

900

800

700

600

500

400

300

200

150

200

MAXIMUM SINGLE POLE TRIP TIMES AT 25¡C

BASED ON NEMA AB-2, 1980

150

100

90

100

90

80

70

80

70

60

50

60

50

40

30

40

30

20

15

20

15

10

9

10

9

8

7

8

7

6

5

6

5

4

3

4

3

2

1.5

1

.9

.8

.7

.8

.7

.6

.5

.6

.5

.4

.3

.4

.3

.2

.15

.1

.09

.08

.07

.08

.07

.06

.05

.06

.05

.04

.03

MAXIMUM CLEARING TIME

(AT 50 HZ)

(AT 60HZ)

.03

.02

1 CYCLE

(50 HZ)

1 CYCLE

(60 HZ)

.015

.01

.009

.008

.01

.009

.008

1

₂CYCLE

(50 HZ)

1

2

CYCLE

(60 HZ)

.007

.006

.007

.006

.005

20

MULTIPLES OF RATED CURRENT

June, 1995

Order No.0730TC8703R5/95

(Replaces 0730TC8703)

Drawing No. B48095-730-03

©

1995 Square D

22

09/2005

QOU Miniature Circuit Breakers and Switches

Tripping Curves

MULTIPLES OF RATED CURRENT

Curve 730-4

10000

9000

8000

10000

9000

8000

®

QO MOLDED CASE CIRCUIT BREAKERS

CHARACTERISTIC TRIP CURVE NO. 730-4

7000

6000

7000

6000

5000

CIRCUIT BREAKER INFORMATION

5000

4000

Continuous

Ampere

Rating

Maximum

AC

Voltage

Number

of

Poles

Circuit Breaker Prefix

4000

3000

QO-K

QO-H, QO-HVH

25

15–25

120

240

1

2

QO-HM, QO-HID, QO-EM, QOU-HM, QOU-VH

QO, QOU, QO-HID, QO-EM, QO-VH, QH, QOU-VH

QO, QOU, QO-HID, QO-VH, QH, QOU-VH

QO-EM

QO, QOU, QO-HID, QO-VH, QH, QOU-VH

15 & 20

25

120/240

240

120/240

240

1

2

3

1, 2

2

3

2000

1500

2000

1500

QO-WH

QO-SWN

15–25

120/240

120

120/240

2

3

1000

900

800

1000

900

800

QO-PL

25

120/240

240

2

3

700

600

700

This curve is to be used for application and coordination purposes only. The

EZ-AMP overlay feature at the bottom of the page should be used during

coordination studies.

600

500

400

All time/current characteristic curve data is based on 40°C ambient cold start.

Terminations are made with conductors of appropriate length and ratings.

300

200

150

200

150

MAXIMUM INDIVIDUAL POLE TRIP TIMES

AT 25°C BASED ON NEMA AB-4, 1991

100

90

100

90

80

70

60

50

60

50

40

30

20

15

20

15

10

9

10

9

8

7

6

5

6

5

4

3

2

1.5

1

.9

.8

.7

.6

.5

.6

.5

.4

.3

.2

.15

.1

.09

.08

.07

.06

.05

.06

.05

MAXIMUM CLEARING TIME

.04

(AT 50 Hz)

(AT 60 Hz)

25 A

20 A

15 A

.03

.02

1 CYCLE

(50 Hz)

1 CYCLE

(60 Hz)

.015

.01

.009

.008

¹/2 CYCLE

(50 Hz)

.01

.009

.008

¹/2 CYCLE

(60 Hz)

.007

.006

.007

.006

.005

TM

MULTIPLES OF RATED CURRENT

25 20 15

Curve No. 0730TC0504

September 2005

Drawing No. 48095-730-04

(Replaces 0730TC8704R5/95)

23

09/2005

QOU Miniature Circuit Breakers and Switches

Tripping Curves

MULTIPLES OF RATED CURRENT

Curve 730-5

10000

9000

8000

10000

9000

8000

®

QO MOLDED CASE CIRCUIT BREAKERS

CHARACTERISTIC TRIP CURVE NO. 730-5

7000

6000

7000

6000

5000

CIRCUIT BREAKER INFORMATION

5000

4000

Circuit Breaker

Prefix

Continuous

Ampere Rating

Maximum

AC Voltage

Number

of Poles

4000

QO-K

30

120

120/240

240

1

1, 2

2

3000

QO-VH, QH, QOU-VH

QO-H

QO-HID, QO-VH, QH, QOU-VH

240

3

QO, QOU, QO-HID, QOU-VH

QO-PL

30–40

30 & 40

120/240

240

120

120/240

2

3

2

3

2000

1500

2000

1500

QO, QOU

QO-SWN

QOU-VH

35–40

120/240

1

1000

900

800

1000

900

800

This curve is to be used for application and coordination purposes only. The

EZ-AMP overlay feature at the bottom of the page should be used during

coordination studies.

700

600

700

600

500

All time/current characteristic curve data is based on 40°C ambient cold start.

Terminations are made with conductors of appropriate length and ratings.

500

400

300

200

150

200

150

MAXIMUM INDIVIDUAL POLE TRIP TIMES

AT 25ꢀC BASED ON NEMA AB-4, 1991

100

90

100

90

80

70

60

50

60

50

40

30

20

15

20

15

10

9

10

9

8

7

6

5

6

5

4

3

2

1.5

1

.9

.8

.7

.6

.5

.6

.5

.4

.3

.2

.15

.1

.09

.08

.07

40 A

.06

.05

.06

.05

35 A

MAXIMUM CLEARING TIME

30 A

.04

(AT 50 Hz)

(AT 60 Hz)

.03

.02

1 CYCLE

(50 Hz)

1 CYCLE

(60 Hz)

.015

1

/

.01

.009

.008

.01

.009

.008

2

CYCLE

1

/

(50 Hz)

2

CYCLE

(60 Hz)

.007

.006

.005

TM

MULTIPLES OF RATED CURRENT

40 30

35

Curve No. 0730TC0505

September 2005

Drawing No. 48095-730-05

(Replaces 0730TC0105)

24

09/2005

QOU Miniature Circuit Breakers and Switches

Tripping Curves

Curve 730-6

MULTIPLES OF RATED CURRENT

10000

9000

8000

10000

9000

8000

7000

QO MOLDED CASE CIRCUIT BREAKERS

CHARACTERISTIC TRIP CURVE NO 730-6

7000

6000

5000

CIRCUIT BREAKER INFORMATION

5000

4000

Circuit Breaker

Prefix

Continuous

Ampere Rating

Maximum

AC Voltage

Number

of Poles

4000

3000

QO-HID

QO-EM

QO, QOU

QO

50

50-60

50-70

50

120/240

240

1,

2

3000

1,

3

QOU

240

3

2

3

2

3

QO-SWN

QO-PL

50

120

2000

1500

2000

1500

50

40-60

120/240

240

This curve is to be used for application and coordination purposes only. The

EZ-AMP overlay feature at the bottom of the page should be used during

coordination studies.

1000

900

1000

900

800

700

All time/current characteristic curve data is based on 40˚C ambient cold start.

Terminations are made with conductors of appropriate length and ratings.

700

600

500

400

300

MAXIMUM SINGLE POLE TRIP TIMES AT 25¡C

BASED ON NEMA AB-2, 1980

300

200

150

200

150

100

90

100

90

80

70

80

70

60

50

60

50

40

30

40

30

20

15

20

15

10

9

10

9

8

7

8

7

6

5

6

5

4

3

4

3

2

1.5

1

.9

.8

.7

.8

.7

.6

.5

.6

.5

.4

.3

.4

.3

70

60

A

.

.2

A

.15

50A.

.1

.09

.08

.07

.08

.07

.06

.05

.06

.05

.04

.03

MAXIMUM CLEARING TIME

(AT 50 HZ)

(AT 60HZ)

.03

.02

1 CYCLE

(50 HZ)

1 CYCLE

(60 HZ)

.015

.01

.009

.008

.01

.009

.008

1

₂CYCLE

(50 HZ)

1

2

CYCLE

(60 HZ)

.007

.006

.007

.006

.005

70

50

60

MULTIPLES OF RATED CURRENT

June, 1995

Order No.0730TC8706R5/95

(Replaces 730-6 dated 5/87)

Drawing No. B48095-730-06

©

1995 Square D

25

09/2005

QOU Miniature Circuit Breakers and Switches

Tripping Curves

Curve 730-7

MULTIPLES OF RATED CURRENT

10000

9000

8000

10000

9000

8000

7000

6000

QO MOLDED CASE CIRCUIT BREAKERS

CHARACTERISTIC TRIP CURVE NO 730-7

6000

5000

4000

CIRCUIT BREAKER INFORMATION

4000

3000

Circuit Breaker

Prefix

Continuous

Ampere Rating

Maximum

AC Voltage

Number

of Poles

3000

QO, QOU

80-100

120/240

240

2

3

2000

1500

2000

1500

This curve is to be used for application and coordination purposes only. The

EZ-AMP overlay feature at the bottom of the page should be used during

coordination studies.

All time/current characteristic curve data is based on 40˚C ambient cold start.

Terminations are made with conductors of appropriate length and ratings.

1000

900

800

1000

900

800

700

600

500

400

300

MAXIMUM SINGLE POLE TRIP TIMES AT 25¡C

BASED ON NEMA AB-2, 1980

200

150

200

150

100

90

100

90

80

70

80

70

60

50

60

50

40

30

40

30

20

15

20

15

10

9

10

9

8

7

8

7

6

5

6

5

4

3

4

3

2

1.5

1

.9

.8

.7

.8

.7

.6

.5

.6

.5

.4

.3

.4

.3

.2

100A.

.15

90A.

.1

.09

.1

.09

80

A.

.08

.07

.08

.07

.06

.05

.06

.05

.04

.03

MAXIMUM CLEARING TIME

(AT 50 HZ)

(AT 60HZ)

.03

.02

1 CYCLE

(50 HZ)

1 CYCLE

(60 HZ)

.015

.01

.009

.008

.01

.009

.008

1

₂CYCLE

(50 HZ)

1

2

CYCLE

(60 HZ)

.007

.006

.007

.006

.005

80

100

90

MULTIPLES OF RATED CURRENT

Curve No. 730-7

5-87 Replaces Curve No. 730-7 dated 5/85

Copyright

26

09/2005

QOU Miniature Circuit Breakers and Switches

Tripping Curves

Curve 730-9

MULTIPLES OF RATED CURRENT

10000

9000

8000

10000

9000

8000

7000

QO MOLDED CASE CIRCUIT BREAKERS

CHARACTERISTIC TRIP CURVE NO 730-9

7000

6000

5000

CIRCUIT BREAKER INFORMATION

5000

4000

Circuit Breaker

Prefix

Continuous

Ampere Rating

Maximum

AC Voltage

Number

of Poles

4000

3000

QO, QOU

125

120/240

2

3000

This curve is to be used for application and coordination purposes only. The

EZ-AMP overlay feature at the bottom of the page should be used during

coordination studies.

2000

1500

2000

1500

All time/current characteristic curve data is based on 40˚C ambient cold start.

Terminations are made with conductors of appropriate length and ratings.

1000

900

1000

900

800

700

600

500

400

300

200

150

200

150

100

90

100

90

80

70

80

70

60

50

60

50

40

30

40

30

20

15

20

15

10

9

10

9

8

7

8

7

6

5

6

5

4

3

4

3

2

1.5

1

.9

.8

.7

.8

.7

.6

.5

.6

.5

.4

.3

.4

.3

.2

.15

.1

.09

.08

.07

.08

.07

.06

.05

.06

.05

.04

.03

MAXIMUM CLEARING TIME

(AT 50 HZ) (AT 60HZ)

.03

.02

1 CYCLE

(50 HZ)

1 CYCLE

(60 HZ)

.015

.01

.009

.008

.01

.009

.008

1

₂CYCLE

(50 HZ)

1

2

CYCLE

(60 HZ)

.007

.006

.007

.006

.005

125

MULTIPLES OF RATED CURRENT

Curve No. 0730TC8709

Drawing No. B48095-730-09

Copyright

27

09/2005

QOU Miniature Circuit Breakers and Switches

Dimensions

DIMENSIONS

1 & 2 pole 10A - 70A and 3 pole 10A -60A QOU Circuit Breakers

2.95

(75)

2.03

(51)

0.35

(9)

2.63

(67)

0.38

(10)

1.15

(29)

Typical

0.24

(6)

0.68

(17)

Both Ends

0.63

(16)

0.36

(9)

1.37

4.05

(103)

2.25

(57)

(35)

0.26

(7)

5.00

(127)

0.61

(16)

0.13

(3)

0.18

(5)

Mounting Brackets to be

installed on both ends as shown.

Catalog Numbers:

One-Pole—QOUMF1

Two-Pole—QOUMF2

Three-Pole—QOUMF3

0.75

(19)

0.75

(19)

1.50

(38)

0.75

(19)

0.76

(19)

1.18

(30)

Typical

Both Ends

ON

1.19

ON

(30)

15

OFF

35 x 7.5 mm DIN Rail

0.75

(19)

Visi-Trip Window

2.12

(54)

1.37

(35)

0.33

(8)

Typical

Both Ends

0.62

(16)

2.25

(57)

Accessory Package Typical Any Circuit Breaker

(Shunt Trip, "A" or "B" Switch, Bell Alarm)

Dim. :in. / pulg / po

mm

28

09/2005

QOU Miniature Circuit Breakers and Switches

Dimensions

80A - 125A Circuit Breakers

0.45

(11)

5.14

(130)

0.58

(15)

0.17

(4)

3.21

(82)

Auxiliary

Device

0.62

(16)

6.30

(160)

0.24

(6)

0.75

(19)

0.74

(19)

2.59

(66)

0.91

(23)

1.50

(38)

0.75

(19)

26˚

Reset

2.07

(53)

22˚

On

21˚

Off

2.25

(57)

1.32

(34)

1.00

(25)

0.58

(15)

3˚

Tripped

0.07

(2)

0.59

(15)

0.09

(2)

1.89

(48)

1.20

(30)

COMMON

TRIP

0.63

(16)

2.96

(75)

0.26

(7)

1.72

(44)

2.37

(60)

0.82

(21)

0.82

(21)

0.74

(19)

1-Pole

1.09

(28)

0.39

(10)

1.48

(38)

2-Pole

4.45

(113)

2.21

(56)

3-Pole

6.78

(172)

Dim: in. / pulg/ po

mm

29

09/2005

QOU Miniature Circuit Breakers and Switches

QYU One-Pole 277 Vac Supplementary Protectors

QYU ONE-POLE 277 VAC SUPPLEMENTARY PROTECTORS

Description

QYU 277 Vac supplementary protectors are available for surface, flush or DIN-rail mounting in 1-pole

construction. Supplementary protectors are 3/4 in. (19.05 mm) wide.

Table 9:

Selection Data

UL Component Recognized Interrupting 5000 RMS Symmetrical Amperes

1-Pole—277 Vac

Ampere Rating

Catalog Number

Terminal Lug Wire Size (AWG)

10

20

25

30

QYU110

QYU120

QYU125

QYU130

1—#14–2 Cu or Al

Applications

One-pole QYU 277 Vac supplementary protectors are UL Recognized Component (meets UL 1077) to

be applied on systems where the maximum phase-to-ground voltage is 277 Vac or less, including use

of 240 Vac corner grounded delta “grounded B” systems.

These devices are designed to provide supplemental overcurrent protection in accordance with Article

240-10 of the 2005 NEC, which states that thermal-magnetic supplementary protectors cannot be

used to replace the primary branch-circuit protection in an application. When used in combination with

branch-circuit protection, as required in Article 210 of the 2005 NEC, these supplementary protectors

can be used to protect lighting fixtures, appliances and other equipment or internal circuits and

components of equipment.

Tripping Characteristics

The QYU trip characterstics are identical to those of the same amperage QOU circuit breaker. See trip

curves 730-1, -3, -4 and -5.

30

09/2005

QOU Miniature Circuit Breakers and Switches

Dimensions

DIMENSIONS

QYU One-pole 277 Vac Supplementary Protectors

2.95

(75)

2.03

(51)

0.35

(9)

2.63

(67)

0.38

(10)

1.15

(29)

Typical

0.24

(6)

0.68

(17)

Both Ends

0.63

(16)

0.36

(9)

1.37

(35)

2.25

(57)

4.05

(103)

0.26

(7)

5.00

(127)

0.61

(16)

0.13

(3)

0.18

(5)

Mounting Brackets to be

installed on both ends as shown.

Catalog Numbers:

One-Pole—QOUMF1

0.75

(19)

0.76

(19)

1.18

(30)

Typical

Both Ends

ON

15

OFF

Dim. :in. / pulg / po

0.62

(16)

mm

31

09/2005

Schneider Electric USA

3700 Sixth St. SW

Cedar Rapids, IA 52404

USA

1-888-Square D

1-888-778-2733

Replaces 0720CT9401 dated 08/1994

09/2005


型号：	QOU245VH
厂家：	ETC
描述：	QOU Miniature Circuit Breakers and Switches Unit Mount (Cable-in/Cable-out)
文件：	总32页 (文件大小：1230K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

QOU245VH [ETC]

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