SE-330-21-11 [LITTELFUSE]

NGR MONITOR 48VDC D-NET NC CE/C-;


型号：	SE-330-21-11
厂家：	LITTELFUSE
描述：	NGR MONITOR 48VDC D-NET NC CE/C- 监视器
文件：	总2页 (文件大小：419K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Protection Relays

Neutral-Grounding-Resistor Monitoring

SE-330, SE-330HV SERIES

Neutral-Grounding-Resistor Monitor

Description

The SE-330 is an advanced ground-fault and neutral-grounding-

resistor monitoring relay that is compliant with Rule10-302 of the

2018 Canadian Electrical Code Part I (CE Code). It measures neutral

current, neutral-to-ground voltage, and neutral-to-ground resistance.

It provides continuous monitoring of the neutral-to-ground path to

verify that the neutral-grounding resistor (NGR) is intact and that it

has not been bypassed or shorted. An open NGR renders current-

sensing ground-fault protection inoperative and could result in a false

belief that the system is functioning properly. A shorted NGR results

in higher-than-expected ground-fault current.The SE-330 can be used

with low- and medium-voltage transformers and generators with

low- or high-resistance grounding used in processing, manufacturing,

chemical, pulp and paper, petroleum, and water-treatment facilities.

For high-voltage applications, use the SE-330HV. For applications that

require conformance to Australian standards, use the SE-330AU.

Simpliﬁed Circuit Diagram

Resistor Monitoring

The SE-330 combines the measured values of resistance, current,

and voltage to continuously determine that an NGR is intact. It is

able to detect an open or shorted resistor with or without a ground

fault present. Sensing resistors are matched to the system voltage

and are used to monitor NGRs on systems up to 72 kV.

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Ground-Fault Monitoring

SE-330 SERIES

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The SE-330 uses an application-appropriate current transformer to

reliably detect ground-fault currents as small as 100 mA. Discrete-

FourierTransform (DFT) ﬁltering ensures that false trips due to

harmonic noise from adjustable-speed drives do not occur. Should

the resistor open and a ground fault subsequently occur, the SE-330

will detect the fault through voltage measurement, while other

current-only sensing relays would be ineffective.

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For detailed wiring diagram, see adjacent page.

Ordering Information

POWER

SUPPLY

K4 UNIT HEALTHY

ORDERING

NUMBER

COMM

CONTACT

Pulsing Ground-Fault Location

The SE-330 is capable of controlling a pulsing contactor, which is

used to switch the NGR resistance in a pulsing-compatible NGR

package.The resulting ground-fault current is distinguishable from

charging currents and noise and will only appear upstream of the

ground fault, making fault location fast and easy, even without

isolating feeders or interrupting loads.

SE-330

0=USB Only

1=DeviceNet

3=EtherNet

(Dual RJ45)

SE-330

for applications

35 kV or less

4=EtherNet

(SC Fiber & RJ45)

0=120/240

Vac/Vdc

0=Normally Open

1=Normally Closed

5=EtherNet

(Dual SC Fiber)

6=IEC61850

(Dual RJ45)

Accessories

SE-330HV

for 72 kV

applications

2=48 Vdc

ER Series Sensing Resistor

Required interface between the power system and the

SE-330/SE-330HV. Eliminates hazardous voltage levels at

the relay.

7=IEC61850

(SC Fiber & RJ45)

8=IEC61850

(Dual SC Fiber)

ELCT5 Series Ground-Fault CurrentTransformer

Sensitive ground-fault current detection (5 A primary).

NOTE: For Australian applications, see the SE-330AU.

ACCESSORIES

ER Series Sensing Resistor

Current Transformer

SE-IP65CVR-G

SE-MRE-600

RK-332

NGRM-ENC

PGA-0520

SE-330-SMA

REQUIREMENT

Required

Optional

ELCT30 Series Ground-Fault CurrentTransformer

Sensitive ground-fault current detection (30 A primary).

Other CurrentTransformer

For low-resistance NGRs choose a CT primary

approximately equal to the NGR rating. Inputs are

provided for 1- and 5- A- secondary CTs.

SE-IP65CVR-G HingedTransparent Cover

Watertight cover, tamper resistant, IP65 protection.

Littelfuse reserves the right to make product changes, without notice. Material in this document is as accurate as known at the time of publication. Visit Littelfuse.com for the most up-to-date information.

Rev: 4-D-042519

Based on SE-330 Manual Rev: 11-A-063018

Based on SE-330 HV Manual Rev: 5-M-101817

Littelfuse.com/se-330 Littelfuse.com/se-330hv

Protection Relays

Neutral-Grounding-Resistor Monitoring

SE-330, SE-330HV SERIES

Neutral-Grounding-Resistor Monitor

Features & Beneﬁts

FEATURES

IEEE #

BENEFITS

Continuous NGR monitoring

Shorted NGR detection

Detects resistor failure within seconds, reduces transient-overvoltage risk, removes risk of ground-fault-detection failure

Detects a ground fault on the neutral that could bypass the resistor, ensures fault current is not higher than expected

Main or backup protection to detect a ground fault anywhere on the monitored system

Select greatest sensitivity without false operation, adjustable in 1% increments (MEM setting)

Adjustable trip delay allows quick protection and system coordination

Ground-fault detection

50G/N, 51G/N, 59N

Adjustable pickup (2-100%)

Adjustable time delay (0.1-10 s)

Universal CT compatibility

Programmable output contacts

Allows the use of a CT that gives required ground-fault settings

Two programmable Form C and One programmable Form A (Ground Fault, Resistor Fault, Unit Health)

Selectable contact

operating mode

Selectable fail-safe or non-fail-safe operating modes allows connection to shunt or undervoltage breaker

coil or alarm circuit (K1, K2, and K3 output contacts)

Analog output (4-20 mA)

Pulsing output (SE-330 only)

Trip records

Connect an optional PGA-0520 meter or control system

Control the operation of a pulsing ground-fault-location circuit

On-board 100-event (with date and time) recorder helps with system diagnostics

Eliminate false trips due to harmonic noise from ASDs

Harmonic ﬁltering (DFT)

Local communications

Data logging

Mini USB port to view measured values, conﬁgure settings, and check event records

On-board microSD card (included) can be used for long-term data logging

Remotely view measured values and event records, reset trips, and cause a remote trip

Available Protocol Options:

IEC 61850 - with dual RJ45, SC Fiber and RJ45, or Dual SC Fiber Interface

Modbus TCP and Ethernet/IP - with dual RJ45, SC Fiber and RJ45, or Dual SC Fiber Interface

DeviceNet - with CAN interface

Network communications

Software

PC-interface software (SE-MON330) is available at Littelfuse.com/RelaySoftware

Selectable latching or auto-reset operation

Selectable reset mode

Unit-healthy output

Conformal coating

Veriﬁes SE-330 is operating correctly, available as Form A or Form B output contact

Internal circuits are conformally coated to protect against corrosion and moisture

TypicalValues

NEUTRAL-GROUNDING RESISTOR

SENSING RESISTOR

RESISTANCE

(SWITCH S5 SETTING)

GROUND-FAULT

PICKUP LEVEL

(AMPERES)

SYSTEM VOLTAGE

(VOLTS)

V_NPICKUP LEVEL

(VOLTS)

CURRENT

RESISTANCE

(OHMS)

MODEL

(AMPERES)

480

600

2,400

4,160

7,200

14,400

277

480

416

554

ER-600VC

ER-5KV

ER-15KV

20 k

100 k

2.5

170

200

800

1,700

170 x 5 = 850

340 x 5 = 1,700

DISCLAIMER: The above table is for illustrative purposes only. Actual values may differ based on a variety of individual system considerations, such as capacitive charging current and coordination study results.

Speciﬁcations

Wiring Diagram

IEEE Device Numbers

Input Voltage

Ground Fault (50G/N, 51G/N, 59N), Checking Relay (3), Lockout Relay (86)

See ordering information

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Dimensions

H 213 mm (8.4"); W 98 mm (3.9"); D 132 mm (5.2")

2-100% of CT-Primary Rating in 1% increments

0.1-10 s

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GF Trip-Level Settings

GF Trip-Time Settings

Vn Trip-Level Settings

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20-2,000 Vac (≤5 kV systems) 100-10,000 Vac (>5 kV systems)

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SE-330 SERIES

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ER SERIES

Contact Operating Mode Selectable fail-safe or non-fail-safe (K1, K2, K3)

Harmonic Filtering

Reset Button

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Standard feature

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Standard feature

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Output Contacts

Pulsing Circuit

Approvals

Two Form A and two Form C

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1.0-3.0 s in 0.2 s increments (SE-330 only)

CSA certiﬁed, UL Listed (E340889), CE (European Union), RCM (Australian)

Mini USB (standard); DeviceNet (optional), IEC 61850 (optional),

Modbus TCP and EtherNet/IP (optional)

4-20 mA, self or loop powered

Standard feature

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Communications

EFCT FAMILY

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Analog Output

Conformally Coated

Warranty

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5 years

Panel and Surface (optional)

Mounting

Rev: 4-D-042519

Based on SE-330 Manual Rev: 11-A-063018

Based on SE-330 HV Manual Rev: 5-M-101817

Littelfuse.com/se-330 Littelfuse.com/se-330hv

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