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
(2 páginas)
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