Protection Relays & Controls
Ungrounded DC System
SE-601 SEriES (PGr-2601)
DC Ground-Fault Monitor
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
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
Simplified Circuit Diagram
+
UNGROUNDED
SUPPLY
A
SE-GRM SERIES
GROUND-REFERENCE
MODULE
bEnEFiTS
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
No calibration required saves on maintenance cost
-
SE-601
Accessories
A
L1
L2
(DC Ground-Fault Monitor)
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.
Ordering Information
OrDErinG nUmbEr
COnTrOL POWEr
Specifications
120/240 Vac/Vdc
12/24 Vdc
48 Vdc
rEqUirEmEnT
SE-601-OU
SE-601-OD
SE-601-OT
aCCESSOriES
SE-GRM SERIES
PGA-0500
PMA-55
PMA-60
Required
Optional
Optional
Optional
IEEE Device Numbers
Input Voltage
Dimensions
Trip Level Settings
Trip Time Settings
Output Contacts
Contact Operating Mode
Test Button
Reset Button
Analog Output
Conformally Coated
Approvals
Warranty
Mounting
Note: For optional conformal coating please consult factory.
DC Overcurrent Relay (76G)
See ordering information
H
75 mm (3.0”);
W
55 mm (2.2”);
D
115 mm (4.5”)
1-20 mA
0.05 -2.5 s
Isolated Form A and Form B
Selectable fail-safe or non-fail-safe
Local
Local and remote
0-5 V
Consult factory
CSA certified, UL Listed (E340889),
CE (European Union), C-Tick (Australian)
5 years
DIN, Surface (standard)
Panel (with PMA-55 or PMA-60 adapter)
Rev: 4-C-050213
Based on Manual Rev 2-A-041913
© 2013 Littelfuse Protection Relays & Controls
Littelfuse.com/se-601
PCB Design
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