SE-MRE-600 [LITTELFUSE]
ER-600VC MOISTURE-RESISTANT ENCL;型号: | SE-MRE-600 |
厂家: | LITTELFUSE |
描述: | ER-600VC MOISTURE-RESISTANT ENCL |
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
X
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
-
X
X
-
0
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
A
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)
B
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
Required
Optional
Optional
Optional
Optional
Optional
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
© 2019 Littelfuse Protection Relays & Controls
©
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
3
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
3
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)
VN PICKUP LEVEL
(VOLTS)
CURRENT
RESISTANCE
(OHMS)
MODEL
(AMPERES)
480
600
2,400
4,160
7,200
14,400
5
5
5
5
10
15
55
69
277
480
416
554
ER-600VC
ER-600VC
ER-5KV
ER-5KV
ER-15KV
ER-15KV
20 k
20 k
20 k
20 k
100 k
100 k
Ω
Ω
Ω
Ω
Ω
Ω
2.5
2.5
2.5
3
2
3
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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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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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
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
© 2018 Littelfuse Protection Relays & Controls
©
Littelfuse.com/se-330 Littelfuse.com/se-330hv
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