Littelfuse Startco SE-601 User manual

3714 Kinnear Place Saskatoon, SK Canada S7P 0A6 Ph: [phone] Fx: [phone] www.littelfuse.com/relayscontrols
SE-601 MANUAL
DC GROUND-FAULT MONITOR
REVISION 2-B-073014
Copyright © 2014 by Littelfuse Startco
All rights reserved.
Document Number: PM-1000-EN
Printed in Canada.

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SE-601 DC Ground-Fault Monitor Rev. 2-B-073014
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SE-601 DC Ground-Fault Monitor Rev. 2-B-073014
TABLE OF CONTENTS
SECTION PAGE
1 General....................................................................... 1
2 Operation................................................................... 1
2.1 Configuration-Switch Settings................................... 1
2.1.1 Relay Operating Mode................................... 1
2.1.2 Reset Mode..................................................... 1
2.2 Front-Panel Controls .................................................. 1
2.2.1 Ground-Fault Trip Level................................ 1
2.2.2 Ground-Fault Trip Time ................................ 1
2.2.3 Reset ............................................................... 1
2.2.4 Test.................................................................. 1
2.3 Front-Panel Indication................................................ 3
2.3.1 Power ............................................................... 3
2.3.2 Trip................................................................... 3
2.4 Analog Output ............................................................ 3
2.5 Self Diagnostics.......................................................... 3
3 Installation................................................................. 3
3.1 SE-601 ........................................................................ 3
3.2 Ground-Reference Modules ...................................... 3
4 SE-601 Compatibility............................................... 9
5 Technical Specifications........................................ 10
5.1 SE-601 ...................................................................... 10
5.2 Ground-Reference Modules ....................................11
6 Ordering Information............................................ 12
7 Warranty................................................................. 13
8 Ground-Fault Performance Test .........................13
Appendix A SE-601 Revision History......................... 15
LIST OF FIGURES
FIGURE PAGE
1 SE-601 Outline and Mounting Details...................... 2
2 Typical Connection Diagram .................................... 3
3 SE-GRM-Series Ground-Reference Modules –
24 to 125 V................................................................. 4
4 SE-GRM-Series Ground-Reference Modules –
250 to 600 V............................................................... 5
5 SE-GRM-Series Ground-Reference Modules –
780 to 1,000 V............................................................ 6
6 PMA-55 Panel-Mount Adapter ................................. 7
7 PMA-60 Panel-Mount Adapter ................................. 8
8 PGA-0500 Analog Percent Current Meter. ............ 9
9 Ground-Fault Test Circuit...................................... 13
10 System Ground-Fault Test.................................. 14
LIST OF TABLES
TABLE PAGE
1 SE-601 Trip Levels and Fault-Resistance Values.... 1
2 Trip-Features Comparison......................................... 9
3 Ground-Fault-Test Record....................................... 14
DISCLAIMER
Specifications are subject to change without notice.
Littelfuse Startco is not liable for contingent or
consequential damages, or for expenses sustained as a
result of incorrect application, incorrect adjustment, or a
malfunction.

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SE-601 DC Ground-Fault Monitor Rev. 2-B-073014
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Page 1
SE-601 DC Ground-Fault Monitor Rev. 2-B-073014
1. GENERAL
The SE-601 is a microprocessor-based ground-fault
monitor for ungrounded dc systems. Its output relay can
operate in the fail-safe or non-fail-safe mode for
undervoltage or shunt-trip applications. The SE-601 has
one output relay with isolated normally open and normally
closed contacts for use in independent control circuits.
Additional features include LED power and faulted-bus
indication, autoreset or latching trips with front-panel and
remote reset, trip memory, test button, self diagnostics,
0- to 5-V analog output, and digital selector switches. The
SE-601 can be DIN-rail, surface, or panel mounted.
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 trip level of the ground-
fault circuit is selectable from 1 to 20 mA. Trip time is
selectable from 0.05 to 2.5 s.
2. OPERATION
2.1 CONFIGURATION-SWITCH SETTINGS
See Fig. 1.
2.1.1 RELAY OPERATING MODE
Switch 1 is used to set the operating mode of the output
relay. In the fail-safe mode, the output relay energizes when
the SE-601 is energized and the ground-fault circuit is not
tripped. If tripped, and the supply voltage is cycled, the
SE-601 will remain tripped, with the trip relay de-energized
and a TRIP LED on, until reset.
In the non-fail-safe mode, the output energizes when a
ground-fault trip occurs. In the non-fail-safe mode, trip
status is not retained in non-volatile memory.
2.1.2 RESET MODE
Switch 2 is used to select autoreset or latching trips. See
Section 2.2.3.
2.2 FRONT-PANEL CONTROLS
2.2.1 GROUND-FAULT TRIP LEVEL
The LEVEL (mA) selector switch is used to set the
ground-fault trip level.
Ground-fault current is a function of fault resistance,
system voltage, and the SE-GRM-series Ground-Reference
Module. Table 1 lists the SE-601 trip levels and fault-
resistance values for 24-, 48-, 125-, 250-, 500-, 780-, and
1000-Vdc systems.
2.2.2 GROUND-FAULT TRIP TIME
The SE-601 has a definite-time trip characteristic. The
TIME (s) selector switch is used to set the ground-fault trip
time.
2.2.3 RESET
If the Reset Mode switch is in the LATCHING position,
a trip remains latched until the RESET button is pressed or
the remote-reset terminals (6 and 7) are momentarily
connected. In the non-fail-safe mode, cycling the supply
voltage will also reset the SE-601.
If the Reset Mode switch is in the AUTORESET
position, a trip will reset when the fault is removed.
The reset circuit responds only to a momentary closure so
that a jammed or shorted button will not prevent a trip. The
front-panel RESET button is inoperative when remote-reset
terminals are connected.
2.2.4 TEST
The TEST button is used to test the ground-fault circuit,
trip indication, and the output relay. When the TEST button
is pressed for one second, a test signal is applied to the
ground-fault-detection circuit, the circuit will trip, both
“-BUS” and “+BUS” TRIP LED’s will light, and the output
relay will operate.
TABLE 1. SE-601 TRIP LEVELS AND FAULT-RESISTANCE VALUES
FAULT RESISTANCE (k

)
TRIP
LEVEL
(mA)
24-Vdc
SYSTEM
SE-GRM024
48-Vdc
SYSTEM
SE-GRM048
125-Vdc
SYSTEM
SE-GRM125
250-Vdc
SYSTEM
SE-GRM250
500-Vdc
SYSTEM
SE-GRM500
780-Vdc
SYSTEM
SE-GRM780
1000-Vdc
SYSTEM
SE-GRM1000
1
2
3
4
5
6
8
10
15
20
11.5
5.5
3.5
2.5
1.9
1.5
1.0
0.7
0.3
0.1
22.3
11.0
7.0
5.0
3.8
3.0
2.0
1.4
0.6
0.2
60.0
28.7
18.3
13.1
10.0
7.9
5.3
3.7
1.6
0.6
120.0
57.5
36.6
26.2
20.0
15.8
10.6
7.5
3.3
1.2
240.0
115.0
73.3
52.5
40.0
31.7
21.3
15.0
6.7
2.5
374.2
179.2
114.2
81.7
62.2
49.2
32.9
23.2
10.2
3.7
480.0
230.0
146.7
105.0
80.0
63.3
42.5
30.0
13.3
5.0

Page 2
SE-601 DC Ground-Fault Monitor Rev. 2-B-073014
.50
.05
.40
.30
.20
.10
1.0
1.5
2.0
2.5
SE-601
5
4
3
2
8
10
15
20
6
1
+
-
DC GROUND-FAULT MONITOR
TEST RESET
TIME (s)
LEVEL (mA)
PWR TRIP
BUS
LITTELFUSE STARTCO
8.7
(0.34)
55.0
(2.17)
37.5
(1.48)
NOTE 2
61.2
(2.41)
75.0
(2.95)
6.9
(0.27)
MOUNTING DETAIL
118.0 (NOTE 3)
(4.65)
110.0
(4.33) 6.3
(0.25)
TOP
55.0
(2.17)
75.0
(2.95)
FRONT
BOTTOM
SIDE
NOTES:
1. DIMENSIONS IN MILLIMETRES (INCHES).
2. MOUNTING SCREWS: M4 OR 8-32.
3. OVERALL DIMENSIONS WHEN MOUNTED ON
DIN EN50022 35 mm x 7.5 mmTOP-HAT RAIL.
4. ADJUSTMENT KNOBS ARE REMOVABLE.
OFF KEEP IN OFF POS.
FAIL-SAFE
LATCHING
NON-FAIL-SAFE
AUTORESET
3
4
5
2
1
CONFIGURATION
SWITCHES
RESET MODE
UNUSED
RELAY OPERATING MODE
OFF KEEP IN OFF POS.
UNUSED
OFF KEEP IN OFF POS.
UNUSED
CONFIGURATION
SWITCHES
RESET MODE
UNUSED
UNUSED
UNUSED
RELAY OPERATING MODE
LATCHING
OFF
OFF
OFF
FAIL-SAFE
AUTORESET
KEEP IN OFF POS.
NON-FAIL-SAFE
5
4
3
2
1
KEEP IN OFF POS.
KEEP IN OFF POS.
FIGURE 1. SE-601 Outline and Mounting Details.

Page 3
SE-601 DC Ground-Fault Monitor Rev. 2-B-073014
2.3 FRONT-PANEL INDICATION
2.3.1 POWER
The green LED labelled PWR indicates presence of the
supply voltage.
2.3.2 TRIP
The red TRIP LED's indicate a ground-fault trip. The
“-BUS” TRIP LED indicates a ground fault on the negative
dc bus. The “+BUS” TRIP LED indicates a ground fault on
the positive dc bus. Two fast flashes indicate a diagnostic
trip. See Section 2.5
2.4 ANALOG OUTPUT
The non-isolated, 0- to 5-V analog output indicates
ground-fault current. The output is 5 V when ground-fault
current is 20 mA. Use a PGA-0500 Analog Percent Current
Meter with the PGA-05CV Voltage Converter to indicate
ground-fault current. See Figs. 2 and 8.
2.5 SELF DIAGNOSTICS
A diagnostic trip is indicated by two fast flashes of the
TRIP LED’s. It can be caused by a diagnostic problem
detected by an incorrect reading from non-volatile memory.
Press RESET or cycle supply voltage. If problems persist,
contact Littelfuse Startco.
3. INSTALLATION
3.1 SE-601
An SE-601 can be surface or DIN-rail mounted. See
Fig. 1. Panel mounting requires a PMA-55 or PMA-60
Panel-Mount Adapter. See Figs. 6 and 7.
Connect the SE-601 DC Ground-Fault Monitor and
SE-GRM-series Ground-Reference Module as shown in
Fig. 2.
Remove the connection to terminals 5 and 9 for
dielectric-strength testing—all inputs and outputs have
ANSI/IEEE C37.90 surge-protection circuits that conduct
above 300 Vac.
3.2 GROUND-REFERENCE MODULES
Outline and mounting dimensions for the SE-GRM-series
Ground-Reference Modules are provided in Figs. 3, 4, and
5.
The SE-GRM780 and SE-GRM1000 dissipate
approximately 9.6 and 12.5 W respectively under normal
conditions and 19.2 and 25.0 W respectively at maximum
when a ground fault is present at 780 V or 1000 V. If the
system is to be operated for more than two minutes with a
ground fault present, an additional heat sink is required.
This can be achieved by applying thermal compound
(silicone grease) to the Ground-Reference Module’s
mounting surface, then securely fastening it to an aluminum
panel with minimum dimensions of 300 mm (12”) x 300
mm (12”) x 3 mm (0.120”)
G
UNGROUNDED
DC SYSTEM
SE-GRMXXX
+
-
+
-
S
L1/(V+) L2/(V-)
REMOTE RESET
LEAKAGE
NOTE 1
11
13
15
6
7
8
L1 S
4
L2/N 10
14
16
NOTE 2
SE-601
RS
ANALOG
OUTPUT
59
GROUND
FAULT
C
NOTES:
1. USE OPTIONAL PGA-0500 ANALOG
PERCENT CURRENT METER WITH
PGA-05CV CURRENT VOLTAGE
CONVERTER TO DISPLAY FAULT CURRENT
AS A PERCENT OF 20 mA.
2. OUTPUT RELAY CONTACTS SHOWN IN THE
DE-ENERGIZED STATE.
3. L1/L2 MAY BE CONNECTEDTO DC BUS FOR
BUS VOLTAGES NOT EXCEEDING SUPPLY
VOLTAGE OPTION SPECIFIED.
4. DO NOT EXCEED OUTPUT-RELAY CONTACT
RATINGS.
I
PGA-0500PGA-05CV
G
R
R
PWR
- BUS
+ BUS
INDICATION
FIGURE 2. Typical Connection Diagram.

Page 4
SE-601 DC Ground-Fault Monitor Rev. 2-B-073014
SE-GRM024TO SE-GRM125
40.0
(1.57)
105.0
(4.13)
41.5
(1.63)
22.2
(0.87)
10.5
(0.41)
10.5
(0.41)
40.0
(1.57)
19.0
(0.75)
TAP M4
OR 8-32
105.0
(4.13)
89.0
(3.50)
8.0
(0.31)
4.5 (0.18) DIA
C’BORE 10.0 (0.39) DIA
3.2 (0.13) DEEP
FRONT SIDE MOUNTING DETAIL
NOTES:
1. DIMENSIONS IN MILLIMETRES (INCHES).
2. MOUNTING SCREWS: M4 OR 8-32.
SE-GRMXXX
XXX VDC
GROUND
REFERENCE
MODULE
+
S
-
UNFAULTED GROUND
FAULT
FAULT
CURRENT
DUTY
CYCLE
MODULE
SE-GRM024 0.3 W 0.6 W MAX 24 mA CONTINUOUS
SE-GRM048 0.6 W 1.2 W MAX 24 mA CONTINUOUS
SE-GRM125 1.6 W 3.2 W MAX 24 mA CONTINUOUS
CONTACT FACTORY FOR OTHER VOLTAGES
FIGURE 3. SE-GRM-Series Ground-Reference Modules – 24 to 125 V.

Page 5
SE-601 DC Ground-Fault Monitor Rev. 2-B-073014
+
-
S
SE-GRMXXX
XXX VDC GROUND
REFERENCE MODULE
+
-
S
63.5
(2.50)
95.0
(3.74)
41.5
(1.63)
22.2
(0.87)
63.5
(2.50)
49.0
(1.93)
7. 3
(0.29)
7. 3
(0.29)
95.0
(3.74)
79.0
(3.11)
8.0
(0.31)
TAP M4
OR 8-32
4.5 (0.18) DIA
C’BORE 10.0 (0.39) DIA
3.2 (0.13) DEEP
NOTES:
1. DIMENSIONS IN MILLIMETRES (INCHES).
2. MOUNTING SCREWS: M4 x 25 OR 8-32 x 1.00.
FRONT SIDE MOUNTING DETAIL
UNFAULTED GROUND
FAULT
FAULT
CURRENT
DUTY
CYCLE
MODULE
SE-GRM250 3.1 W 6.3 W MAX 25 mA CONTINUOUS
SE-GRM300 3.6 W 7.2 W MAX 24 mA CONTINUOUS
SE-GRM400 4.4 W 8.9 W MAX 22 mA CONTINUOUS
SE-GRM500 6.3 W 12.5 W MAX 25 mA CONTINUOUS
SE-GRM600 7.2 W 14.4 W MAX 24 mA CONTINUOUS
SE-GRM250TO SE-GRM600
CONTACT FACTORY FOR OTHER VOLTAGES
FIGURE 4. SE-GRM-Series Ground-Reference Modules – 250 to 600 V.

Page 6
SE-601 DC Ground-Fault Monitor Rev. 2-B-073014
CAUTION XXX V
SE-GRMXXX
SE-GRM780TO SE-GRM1000
91.7
(3.61)
78.5
(3.09)
14.1
(0.56)
63.5
(2.50)
5.0
(0.20)
203.2
(8.00)
212.7
(8.37)
MOUNTING DETAILSIDEFRONT
NOTES:
1. DIMENSIONS IN MILLIMETRES (INCHES).
2. MOUNTING SCREWS: M4 OR 8-32.
3. ADDITIONAL HEAT SINK REQUIRED IF OPERATED MORETHAN TWO MINUTES WITH A GROUND FAULT.
XXX VDC
GROUND
REFERENCE
MODULE
+
-
S
UNFAULTED GROUND
FAULT
FAULT
CURRENT
DUTY
CYCLE
MODULE
SE-GRM780 9.6 W 19.2 W MAX 24.6 mA CONTINUOUS
SE-GRM1000 12.5 W 25 W MAX 25 mA CONTINUOUS
CONTACT FACTORY FOR OTHER VOLTAGES
FIGURE 5. SE-GRM-Series Ground-Reference Modules – 780 to 1,000 V.

Page 7
SE-601 DC Ground-Fault Monitor Rev. 2-B-073014
85.0
(3.35)
109.0
(4.29)
PANELTHICKNESS
1.6 (0.06)TO 4.8 (0.19)
75.0
(2.95)
85.0
(3.35)
42.5
(1.67)
FRONT VIEW
BEZEL
SIDE VIEW
BRACKET 55 mm (2.2) WIDE
MONITOR
.50
.05
.40
.30
.20
.10
1.0
1.5
2.0
2.5
SE-601
5
4
3
2
8
10
15
20
6
1
+
-
DC GROUND-FAULT MONITOR
TEST RESET
TIME (s)
LEVEL (mA)
PWR TRIP
BUS
LITTELFUSE STARTCO
85.0
(3.35)
72.0
(2.83)
60.0
(2.36)
6.0
(0.24)
6.0
(0.24)
9.5
(0.37)
42.5
(1.67)
30.0
(1.18)
60.0
(2.36)
79.0
(3.11)
9.5
(0.37)
2.0 (0.08) RAD
MAXIMUM
3.8 (0.15) DIA
8.4 (0.33) DIA
4.2 (0.16) RAD
ALTERNATE
CONFIGURATIONS
PANEL CUTOUT DETAIL
INSTALLATION INSTRUCTIONS:
1. REMOVE BEZEL AND LATCH MONITORTO
BRACKET.
2. INSERT BRACKET THROUGH FRONT OF PANEL
CUTOUT AND SECURE WITH FLAT WASHERS AND
LOCKNUTS PROVIDED.
3. CONNECT WIRINGTOTERMINALS.
4. INSTALL BEZEL USING 6-32 x 0.31 SCREWS
PROVIDED.
NOTES:
1. DIMENSIONS IN MILLIMETRES (INCHES).
FIGURE 6. PMA-55 Panel-Mount Adapter.

Page 8
SE-601 DC Ground-Fault Monitor Rev. 2-B-073014
M4
M4
.50
.05
.40
.30
.20
.10
1.0
1.5
2.0
2.5
SE-601
5
4
3
2
8
10
15
20
6
1
+
-
DC GROUND-FAULT MONITOR
TEST RESET
TIME (s)
LEVEL (mA)
PWR TRIP
BUS
LITTELFUSE STARTCO
99.0
(3.90)
88.0
(3.46)
44.0
(1.73)
FRONT VIEW
116.0
(4.57)
PANELTHICKNESS
1.6 (0.06)TO 4.8 (0.19)
75.0
(2.95)
SIDE VIEW
BRACKET 55 mm (2.2) WIDE
MONITOR
TRANSPARENT
COVER (NOTE 2)
99.0
(3.90)
72.0
(2.83)
60.0
(2.36)
6.0
(0.24)
6.0
(0.24)
9.5
(0.37)
44.0
(1.73)
30.0
(1.18)
60.0
(2.36)
79.0
(3.11)
9.5
(0.37)
2.0 (0.08) RAD
MAXIMUM
4.5 (0.18) DIA
8.7 (0.34) DIA
4.3 (0.17) RAD
ALTERNATE
CONFIGURATIONS
PANEL CUTOUT DETAIL
INSTALLATION INSTRUCTIONS:
1. WITH COVER REMOVED LATCH MONITORTO
BRACKET.
2. INSERT BRACKET THROUGH FRONT OF PANEL
CUTOUT AND SECURE WITH FLAT WASHERS
AND LOCKNUTS PROVIDED.
3. CONNECT WIRINGTOTERMINALS.
4. ATTACH COVER USING SECURITY SCREWS
OR THUMB SCREWS PROVIDED.
NOTES:
1. DIMENSIONS IN MILLIMETRES (INCHES).
2. MEETS NEMA3, IP53.
3. INCLUDESTWOTR20TAMPER-RESISTANT
TORX SCREWS (M4-0.7x16 mm, INSTALLED)
ANDTWOTHUMB SCREWS.
FIGURE 7. PMA-60 Panel-Mount Adapter.

Page 9
SE-601 DC Ground-Fault Monitor Rev. 2-B-073014
%
100
0
20
40
80
60
®
67.5
(2.657)
R1.25(0.049)
MAXIMUM
67.5
(2.657)
66.0
(2.598)
48.0
(1.890)
TOP MOUNTING CUTOUT
71.0
(2.795)
65.0
(2.559)
ANALOG % CURRENT METER
PGA-0500
REARSIDE
FRONT
NOTE 1
NOTES:
1. CONVERSION KIT FOR 0-5 V ANALOG
OUTPUT. SEE PGA-0500 DOCUMENTATION.
2. DIMENSIONS IN MILLIMETRES (INCHES).
FIGURE 8. PGA-0500 Analog Percent Current Meter.
4. SE-601 COMPATIBILITY
The current SE-601 has been enhanced with the
addition of non-volatile trip memory for the fail-safe
relay operating mode. Prior to hardware revision 01, a
mechanical flag was used instead of non-volatile
memory. The current revision of the SE-601 can directly
replace previous revision-00 units. The hardware-
revision number is listed on the SE-601 model/serial-
number label affixed to the SE-601 enclosure. Both
generations are compared in Table 2.
TABLE 2. TRIP-FEATURES COMPARISON
HARDWARE REVISION
00 01
LED trip indication Yes Yes
Mechanical flag trip indication Yes No
Non-volatile trip memory No Yes
Device state after supply voltage cycled
when tripped (ground-fault removed)
Fail-safe
Trip LED: Off
Trip relay: Energized
Trip flag: Red
Trip LED: On
Trip relay: De-energized
Non-fail-safe
Trip LED: Off
Trip relay: De-energized
Trip flag: Red
Trip LED: Off
Trip relay: De-energized

Page 10
SE-601 DC Ground-Fault Monitor Rev. 2-B-073014
5. TECHNICAL SPECIFICATIONS
5.1 SE-601
Supply:
0U Option ........................... 5 VA, 120 to 240 Vac
(+20, -55%), 50/60 Hz,
2 W, 100 to 240 Vdc
(+20, -25%)
0D Option ........................... 2 W, 12 to 30 Vdc
(+20, -25%)
0T Option............................ 2 W, 40 to 55 Vdc
(+20, -25%)
Trip-Level Settings......................1, 2, 3, 4, 5, 6, 8, 10, 15,
and 20 mA
Trip-Time Settings ................... 0.05, 0.10, 0.20, 0.30,
0.40, 0.50, 1.0, 1.5, 2.0,
and 2.5 s
Accuracies: (1)
Trip Level ..............................5% of setting,
0.15 mA minimum
Trip Time
(2) ...........................5% of setting,
15 ms minimum
Trip Mode ....................................Latching or Autoreset
Analog Output:
Range .....................................0 to 5 V, 0.25 V per mA
Output Impedance .................220 
Reset.............................................Front-Panel Button and
Remote, N.O. Momentary
Contact
Functional Test ............................Front-Panel Button
Relay Contacts:
Configuration ........................Isolated N.O. and N.C.
Operating Mode.....................Fail-Safe or Non-Fail-
Safe
CSA/UL Rating ....................8 A resistive, 250 Vac
8 A resistive, 30 Vdc
0.25 HP, 120/240 Vac
Supplemental Contact Ratings:
Carry Current ................... 8 A, maximum
Break:
30 Vdc........................... 240 W Resistive,
170 W Inductive
(L/R = 7 ms)
120 Vdc......................... 24 W Resistive,
17 W Inductive
(L/R = 7 ms)
ac ...................................2,000 VA Resistive,
875 VA Inductive
(PF = 0.4)
(Subject to maximums of 8 A and 250 Vac/
30 Vdc or 200 mA at 120 Vdc)
Terminals..................................Wire-clamping 24 to
12 AWG (0.2 to
2.5 mm2) conductors
Dimensions:
Height.....................................75 mm (3.0”)
Width......................................55 mm (2.2”)
Depth......................................113 mm (4.5”)
Shipping Weight..........................0.45 kg (1 lb)
Environment:
Operating Temperature:
Altitude:
≤1,000 m (3,281’)...........-40 to 60C (-40 to 140°F)
3,000 m (9,843’)..............-40 to 55C (-40 to 131°F)
5,000 m (16,404’)............-40 to 50C (-40 to 122°F)
Storage Temperature .............-55 to 80C (-67 to 160°F)
Humidity ................................85% Non-Condensing
Altitude ..................................5,000 m (16,404’)
maximum
PWB Conformal Coating ............MIL-1-46058 qualified
UL QMJU2 recognized
Surge Withstand ..........................ANSI/IEEE 37.90.1-1989
(Oscillatory and Fast
Transient)
Vibration ......................................EN60255-21-1
(Vibration, Shock, and
Seismic)
EN60255-21-2 (Shock
and Bump)
EMC Tests:
Verification tested in accordance with EN 50263:2000
Radiated and Conducted
Emissions............................CISPR 11:2009,
CISPR 22:2008,
EN55022:2010
Class A
Current Harmonics and
Voltage Fluctuation.............IEC 61000-3-2 and
IEC 61000-3-3
Class A

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SE-601 DC Ground-Fault Monitor Rev. 2-B-073014
Electrostatic Discharge........ IEC 61000-4-2
± 6 kV contact discharge
(direct and indirect)
± 8 kV air discharge
Radiated RF Immunity........ IEC 61000-4-3
10 V/m, 80-1000 MHz,
80% AM (1 kHz)
10 V/m, 900 MHz,
200 Hz pulse modulated
Fast Transient...................... IEC 61000-4-4
4 kV on AC mains and
I/O lines
Surge Immunity .................. IEC 61000-4-5
Zone B
± 1 kV differential mode
± 2 kV common mode
Conducted RF Immunity .... IEC 61000-4-6
10 V, 0.15-80 MHz,
80% AM (1 kHz)
Magnetic Field Immunity ... IEC61000-4-8
50 Hz and 60 Hz , 30 A/m
and 300 A/m
Voltage Interruption ........... IEC 61000-4-11,
IEC 61000-4-29,
0% for 5, 10, 20, 50,
100 & 200 ms 3x each
Power Frequency ................ IEC 61000-4-16
Zone A: differential
mode 150 Vrms
Zone A: common mode
300 Vrms
1 MHz Burst ....................... IEC 61000-4-18
± 1 kV differential mode
(line-to-line)
± 2.5 kV common mode
RFI Compliance ....................... FCC Part 15, Subpart B,
Class A – Unintentional
Radiators
Certification .................................CSA, Canada and USA
LR 53428
USC
R
ULListed
Australia
N11659
FCC
CE, European Union
Complies to IEC 61010-1:2001 (2nd Edition);
EN 61010-1:2001 (2nd Edition) Safety Requirements for
Electrical Equipment for Measurement, Control, and
Laboratory Use – Part 1.
NOTES:
(1) Over operating temperature range of -40 to 60C (-40
to 140°F).
(2) Trip time at 3 × trip-level setting.
5.2 GROUND REFERENCE MODULES
Nominal Current..........................12.5 mA
Maximum Fault Current..............25 mA
Duty Cycle ...................................Continuous
Environment:
Operating Temperature .......40 to 60C (-40 to
140°F)
Storage Temperature...........55 to 80C (-67 to
160°F)
Humidity ................................85% Non-Condensing
SE-GRM024:
Power Dissipation
At 24 Vdc...........................Unfaulted 0.3 W,
Ground Fault 0.6 W
maximum
Shipping Weight...................300 g (0.7 lb)
SE-GRM048:
Power Dissipation
At 48 Vdc...........................Unfaulted 0.6 W,
Ground Fault 1.2 W
maximum
Shipping Weight...................300 g (0.7 lb)

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SE-601 DC Ground-Fault Monitor Rev. 2-B-073014
SE-GRM125:
Power Dissipation
At 125 Vdc .........................Unfaulted 1.6 W,
Ground Fault 3.2 W
maximum
Shipping Weight....................300 g (0.7 lb)
SE-GRM250:
Power Dissipation
At 250 Vdc .........................Unfaulted 3.1 W,
Ground Fault 6.3 W
maximum
Shipping Weight....................500 g (1.6 lb)
SE-GRM300:
Power Dissipation
At 300 Vdc .........................Unfaulted 3.6 W,
Ground Fault 7.2 W
maximum
Shipping Weight....................500 g (1.6 lb)
SE-GRM400:
Power Dissipation
At 400 Vdc .........................Unfaulted 4.4 W,
Ground Fault 8.9 W
maximum
Shipping Weight....................500 g (1.6 lb)
SE-GRM500:
Power Dissipation
At 500 Vdc .........................Unfaulted 6.3 W,
Ground Fault 12.5 W
maximum
Shipping Weight....................500 g (1.6 lb)
SE-GRM600:
Power Dissipation
At 600 Vdc .........................Unfaulted 7.2 W,
Ground Fault 14.4 W
maximum
Shipping Weight....................500 g (1.6 lb)
SE-GRM780:
Power Dissipation
At 780 Vdc .........................Unfaulted 9.6 W,
Ground Fault 19.2 W
maximum
Shipping Weight....................2.1 kg (4.5 lb)
SE-GRM1000:
Power Dissipation
At 1000 Vdc .......................Unfaulted 12.5 W,
Ground Fault 25.0 W
maximum
Shipping Weight....................2.1 kg (4.5 lb)
6. ORDERING INFORMATION
SE-601-0 -
Supply:
U – Universal 120/240-Vac/Vdc Supply
D – 12/24-Vdc Supply
T – 48-Vdc Supply
Conformal Coating:
Blank – Partial Conformal Coating
CC – Full Conformal Coating
SE-GRM024 ....... Ground-Reference Module for 24-Vdc
system
SE-GRM048 ....... Ground-Reference Module for 48-Vdc
system
SE-GRM125 ....... Ground-Reference Module for 125-Vdc
system
SE-GRM250 ....... Ground-Reference Module for 250-Vdc
system
SE-GRM300 ....... Ground-Reference Module for 300-Vdc
system
SE-GRM400 ....... Ground-Reference Module for 400-Vdc
system
SE-GRM500 ....... Ground-Reference Module for 500-Vdc
system
SE-GRM600 ....... Ground-Reference Module for 600-Vdc
system
SE-GRM780 ....... Ground-Reference Module for 780-Vdc
system
SE-GRM1000..... Ground-Reference Module for 1000-Vdc
system
Consult factory for other ground-reference modules.
PGA-0500 ........... Analog Percent Current Meter, 0 to
100% range (PGA-05CV included)
PMA-55 ............. Panel-Mount Adapter NEMA 1
PMA-60 .............. Panel-Mount Adapter, NEMA 3, IP53.
Includes two TR20 tamper-resistant
Torx screws and two thumb screws.
Consult factory for custom mounting adapters

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SE-601 DC Ground-Fault Monitor Rev. 2-B-073014
7. WARRANTY
The SE-601 DC Ground-Fault Monitor is warranted to
be free from defects in material and workmanship for a
period of five years from the date of purchase.
Littelfuse Startco will (at Littelfuse Startco’s option)
repair, replace, or refund the original purchase price of
an SE-601 that is determined by Littelfuse Startco to be
defective if it is returned to the factory, freight prepaid,
within the warranty period. This warranty does not
apply to repairs required as a result of misuse,
negligence, an accident, improper installation, tampering,
or insufficient care. Littelfuse Startco does not warrant
products repaired or modified by non-Littelfuse Startco
personnel.
8. GROUND-FAULT PERFORMANCE TEST
A test record form is provided for recording the date
and the final results of the performance tests. The
following ground-fault system test is to be conducted by
qualified personnel.
a) Evaluate the interconnected system in accordance
with the overall equipment manufacturer’s detailed
instructions.
b) Verify proper reaction of the device in response to a
simulated or complete system test.
c) To simulate a ground fault, power down the entire
system and remove the connection to terminal 4 (S).
Ensure that terminal 5 is connected to ground. Using
a 24 Vdc source, 50 kΩvariable resistor, fixed 1 kΩ
resistor, and an ammeter, connect the circuit as
shown in Fig. 9. Select a trip current on the SE-601,
and slowly vary the resistance until the monitor trips.
Never exceed 30 mA through the monitor.
d) For a system ground-fault test, install a fixed or
variable resistance and switch that is suitably rated
for the system. Install a fuse rated to protect the test
circuit. The fixed test resistance can be sized to
cause a ground-fault current just above the trip level
setting. See Fig. 10. For a reference of fault-
resistance values, see Table 1.
e) Record the date and the results of the test on the
attached test record form.
G
L1/(V+) L2/(V-)
REMOTE RESET
LEAKAGE
11
13
15
6
7
8
L1 S
4
L2/N 10
14
16
SE-601
RS
ANALOG
OUTPUT
59
I
PGA-0500PGA-05CV
A
24 Vdc
1 kΩ
50 kΩ
FIGURE 9. Ground-Fault Test Circuit.

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SE-601 DC Ground-Fault Monitor Rev. 2-B-073014
G
UNGROUNDED
DC SYSTEM
SE-GRMXXX
+
-
+
-
S
L1/(V+) L2/(V-)
REMOTE RESET
LEAKAGE
11
13
15
6
7
8
L1 S
4
L2/N 10
14
16
SE-601
RS
ANALOG
OUTPUT
59
GROUND
FAULT
C
I
PGA-0500PGA-05CV
R
L
FIGURE 10. System Ground-Fault Test.
TABLE 3. GROUND-FAULT-TEST RECORD
DATE TEST RESULTS
Retain this record for the authority having jurisdiction.

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SE-601 DC Ground-Fault Monitor Rev. 2-B-073014
APPENDIX A
SE-601 REVISION HISTORY
MANUAL
RELEASE DATE MANUAL REVISION PRODUCT REVISION (REVISION NUMBER ON PRODUCT LABEL)
July 30, 2014 2-B-073014 03
April 19, 2013 2-A-041913
MANUAL REVISION HISTORY
REVISION 2-B-073014
S
ECTION 5
Updated to include altitude and vibration specifications.
S
ECTION 8
Ground-fault performance test added.
A
PPENDIX A
Revision history updated.
REVISION 2-A-041913
S
ECTION 3
Fig. 2 updated to include PGA-05CV.
S
ECTION 5
Environment section updated to include Fahrenheit temperature range. SE-601 dimensions added.
A
PPENDIX A
Revision history added.
PRODUCT REVISION HISTORY
REVISION 03
Firmware: Improved operation of front-panel test button.

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