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Littelfuse SE-601 Series User Manual

Protection relays & controls, Ungrounded dc system description, Dc ground-fault monitor specifications

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Protection Relays & Controls

© 2013 Littelfuse Protection Relays & Controls

Littelfuse.com/se-601

Ungrounded DC System

Description

The SE-601 is a microprocessor-based ground-fault relay for

ungrounded dc systems. It provides sensitive ground-fault

protection without the problems associated with nuisance

tripping. Ground-fault current is sensed using an SE-GRM

Series Ground-Reference Module—a resistor network that

limits ground-fault current to 25 mA. The SE-601 is used

on ungrounded dc systems ranging from industrial 24-Vdc

control circuits to 1000-Vdc solar and transportation systems.

SE-601 SEriES (PGr-2601)

DC Ground-Fault Monitor

Specifications

IEEE Device Numbers

DC Overcurrent Relay (76G)

Input Voltage

See ordering information

Dimensions

H 75 mm (3.0”); W 55 mm (2.2”); D 115 mm (4.5”)

Trip Level Settings

1-20 mA

Trip Time Settings

0.05-2.5 s

Output Contacts

Isolated Form A and Form B

Contact Operating Mode Selectable fail-safe or non-fail-safe
Test Button

Local

Reset Button

Local and remote

Analog Output

0-5 V

Conformally Coated

Consult factory

Approvals

CSA certified, UL Listed (E340889),

CE (European Union), C-Tick (Australian)

Warranty

5 years

Mounting

DIN, Surface (standard)

Panel (with PMA-55 or PMA-60 adapter)

OrDErinG nUmbEr

COnTrOL POWEr

SE-601-OU

120/240 Vac/Vdc

SE-601-OD

12/24 Vdc

SE-601-OT

48 Vdc

aCCESSOriES

rEqUirEmEnT

SE-GRM SERIES

Required

PGA-0500

Optional

PMA-55

Optional

PMA-60

Optional

Note: For optional conformal coating please consult factory.

Ordering Information

Simplified Circuit Diagram

SE-GRM Series Ground-Reference Module

Required accessory, used to connect the

SE-601 DC Ground-Fault Monitor to the

DC bus.

PGA-0500 Analog % Current Meter

Optional panel-mounted analog meter displays

ground-fault current as a percentage of 22 mA.

FEaTUrES

bEnEFiTS

Adjustable pickup

(1 - 20 mA)

Ten settings provide a wide range of

low-level protection

Adjustable time delay

(50 ms - 2.5 s)

Adjustable trip delay allows quick protection or

delayed response

Output contacts

Form A and Form B output contacts for operation of

separate annunciation and trip circuits

Analog output

(0 - 5 V)

Provides means for connecting to a meter

(PGA-0500) or a control system

Non-volatile trip

Memory

Retains trip state when de-energized to simplify

troubleshooting

Selectable contact

operating mode

Selectable fail-safe or non-fail-safe operating

modes allow connection to shunt or undervoltage

breaker coil

Microprocessor based

No calibration required saves on maintenance cost

Features & Benefits

Accessories

A

GROUND-REFERENCE
MODULE

UNGROUNDED

SUPPLY

L2

SE-601

SE-GRM SERIES

L1

+

-

(DC Ground-Fault Monitor)

A

Rev: 4-C-050213

Based on Manual Rev 2-A-041913