Littelfuse SE-601 User Manual

Protection Relays & Controls

Ungrounded DC System

SE-601 SERIES (PGR-2601)

DC Ground-Fault Monitor

Simplified Circuit Diagram

+

A

UNGROUNDED

SUPPLY

SE-GRM SERIES

GROUND-REFERENCE
MODULE

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.

Features & Benefits

FEATURES BENEFITS

Adjustable pickup
(1 - 20 mA)

Adjustable time delay
(50 ms - 2.5 s)

Output contacts

Analog output
(0 - 5 V)

Non-volatile trip
Memory

Selectable contact
operating mode

Microprocessor based No calibration required saves on maintenance cost

Ten settings provide a wide range of
low-level protection

Adjustable trip delay allows quick protection or
delayed response

Form A and Form B output contacts for operation of
separate annunciation and trip circuits

Provides means for connecting to a meter
(PGA-0500) or a control system

Retains trip state when de-energized to simplify
troubleshooting

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

-

SE-601

L1

L2

Ordering Information

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 o ptiona l conformal coating p lease consult factory.

(DC Ground-Fault Monitor)

Accessories

A

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.

Specifications

IEEE Device Numbers DC Overcurrent Relay (76G)
Input Voltage See ordering information
Dimensions
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

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

Warranty 5 years
Mounting DIN, Surface (standard)

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

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

CSA certified

, UL Listed (E340889),

© 2013 Littelfuse Protection Relays & Controls
Littelfuse.com/se-601

Based on Manual Rev 2-A-041913

Rev: 4-C-050213