Littelfuse SE-703 User manual

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SE-703 MANUAL
EARTH-LEAKAGE MONITOR
REVISION 12-B-092117
Copyright © 2017 by Littelfuse Startco
All rights reserved.
Document Number: PM-1045-EN
Printed in Canada.

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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 Filter Selection ............................................... 1
2.2 Front-Panel Controls.................................................. 1
2.2.1 Earth-Leakage Trip Level.............................. 1
2.2.2 Earth-Leakage Trip Time .............................. 1
2.2.3 Reset ............................................................... 1
2.2.4 Test .................................................................1
2.3 Front-Panel Indication ............................................... 1
2.3.1 Power.............................................................. 1
2.3.2 Trip .................................................................1
2.3.3 CT Verification .............................................. 1
2.4 Analog Output............................................................ 5
2.5 Self Diagnostics ......................................................... 5
3 Installation ................................................................ 5
4 Technical Specifications ........................................13
5 Ordering Information ...........................................15
6 Warranty.................................................................15
7 Earth-Fault Performance Test.............................15
Appendix A SE-703 Revision History ........................ 17
LIST OF FIGURES
FIGURE PAGE
1A SE-703-0X-00 Outline and Mounting Details .......... 2
1B SE-703-0X-02 Outline and Mounting Details.......... 3
1C SE-703-0X Outline and Mounting Details ............... 4
2 Typical Connection Diagrams................................... 5
3 Typical Three-Phase Starter Connection .................. 6
4 EFCT-1 Outline and Mounting Details..................... 7
5 EFCT-2 Outline and Mounting Details..................... 8
6 EFCT-26 Outline and Mounting Details................... 9
7 PMA-55 Panel-Mount Adapter ...............................10
8 PMA-60 Panel-Mount Adapter ...............................11
9 PGA-0500 Analog Percent Current Meter..............12
10 TRIP Relays Maximum Switching Capacity.......... 12
11 Earth-Fault-Test Circuit........................................... 16
LIST OF TABLES
TABLE PAGE
1Earth-Fault-Test Record ..........................................16
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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1. GENERAL
The SE-703 is a microprocessor-based earth-leakage
monitor for ac power supply systems incorporating earth-
fault current limitation. The SE-703 has two isolated
Form-C relays for use in independent control circuits.
Additional features include LED trip and power
indication, latching trips with front-panel and remote
reset, trip memory, test button, self diagnostics, 0 to 5-V
analog output, CT verification with LED indication,
digital selector switches, and switch-selectable algorithms
for fixed-frequency or variable-frequency applications.
Earth-leakage current is sensed by an EFCT-series
core-balance earth-fault current transformer (CT). The
trip level of the earth-leakage circuit is digital-switch
selectable from 25 to 500 mA. Trip time is digital-switch
selectable from INST (instantaneous) to 500 ms.
Ordering option SE-703-0x-00 is AS/NZS 2081:2011
compliant. Its output relays operate in the fail-safe mode for
undervoltage applications.
Ordering option SE-703-0x-02 is AS/NZS 2081:2002
compliant. Its output relays operate in the fail-safe or non-
fail-safe mode for undervoltage or shunt-trip applications.
2. OPERATION
2.1 CONFIGURATION-SWITCH SETTINGS
See Figs. 1A, 1B and 1C.
2.1.1 RELAY OPERATING MODE
The output relays for ordering option SE-703-0x-00
operate only in the fail-safe mode for undervoltage
applications.
The output relays for ordering option SE-703-0x-02
operate in the fail-safe or non-fail-safe mode for
undervoltage or shunt-trip applications.
Switch 1 is used to set the operating mode of the output
relays (for SE-703-0x-02 only).
In the fail-safe mode, the output relays energize when
the earth-leakage circuit is not tripped. Non-volatile
memory retains the trip status of the SE-703. If tripped,
and the supply voltage is cycled, the SE-703 will remain
tripped, with the trip relay de-energized and the TRIP
LED on, until reset.
In the non-fail-safe mode, the output relays energize
when a ground-fault trip occurs. Trip status is not
retained in non-volatile memory.
2.1.2 FILTER SELECTION
Switch 2 is used to select the filtering algorithm for a
fixed-frequency (50/60 Hz) or variable-frequency
application. The FIXED FREQUENCY setting uses a
DFT filter that allows lower trip levels to be used by
rejecting harmonics that can cause nuisance tripping.
The VARIABLE FREQUENCY setting uses a peak-
detection algorithm with a wider bandwidth for fault
detection in variable-frequency drive applications.
2.2 FRONT-PANEL CONTROLS
2.2.1 EARTH-LEAKAGE TRIP LEVEL
The LEVEL (mA) selector switch is used to set the
earth-leakage trip level. For earth-leakage detection, the
earth-leakage trip level must be substantially below the
prospective earth-fault current. To avoid sympathetic
tripping, the trip level must be above the charging current
of the protected feeder.
2.2.2 EARTH-LEAKAGE TRIP TIME
The SE-703 has a definite-time trip characteristic. The
TIME (ms) selector switch is used to set the earth-leakage
trip time for coordination with upstream and downstream
earth-fault devices. Coordination requires the same trip
level for all earth-leakage devices in a system and the trip
time to progressively increase upstream. The amount of
equipment removed from the system will be a minimum
if the first earth-leakage device to operate is the one
immediately upstream from the fault.
2.2.3 RESET
A trip remains latched until the RESET button is
pressed or the remote-reset terminals (6 and 7) are
momentarily connected.
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 the
remote-reset terminals are connected.
2.2.4 TEST
The TEST button is used to test the earth-leakage
circuit, the indication, and the output relays. When the
TEST button is pressed for one second, a test signal is
applied to the earth-leakage-detection circuit, the circuit
will trip, the TRIP LED will light, and the output relays
will operate.
2.3 FRONT-PANEL INDICATION
2.3.1 POWER
The green LED labelled PWR indicates presence of
supply voltage.
2.3.2 TRIP
The red LED labelled TRIP indicates a trip. A solid red
LED indicates an earth-leakage trip and a flashing LED
indicates a trip initiated by a CT fault. Two fast flashes of
the TRIP LED indicate a diagnostic trip. See Section 2.5.
2.3.3 CT VERIFICATION
The green LED labelled CT indicates that an EFCT-series
sensor is connected.

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SE-703 Earth-Leakage Monitor Rev. 12-B-092117
FIGURE 1A. SE-703-0X-00 Outline and Mounting Details.

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SE-703 Earth-Leakage Monitor Rev. 12-B-092117
FIGURE 1B. SE-703-0X-02 Outline and Mounting Details.

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SE-703 Earth-Leakage Monitor Rev. 12-B-092117
FIGURE 1C. SE-703-0X Outline and Mounting Details.

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SE-703 Earth-Leakage Monitor Rev. 12-B-092117
2.4 ANALOG OUTPUT
The non-isolated, 0- to 5-V analog output indicates earth-
leakage current sensed by the EFCT. The output is 5 V when
earth-leakage current is 500 mA. Use a PGA-0500 Analog
Percent Current Meter with the PGA-05CV Voltage
Converter to indicate earth-leakage current. See Figs. 2, 3,
and 9.
2.5 SELF DIAGNOSTICS
A diagnostic trip is indicated by two fast flashes of the
TRIP LED. It can be caused by a problem detected by an
incorrect reading from non-volatile memory. Press RESET
or cycle supply voltage. If the problem persists, consult
Littelfuse Startco.
3. INSTALLATION
NOTE: Mounting, terminal-block connections, and wiring
must conform to applicable local electrical codes. Check
all applicable codes prior to installation
This earth-leakage monitoring system consists of an
SE-703 Earth-Leakage Monitor and an EFCT-series current
sensor connected as shown in Figs. 2 and 3.
An SE-703 can be surface or DIN-rail mounted. See
Figs. 1A, 1B and 1C. Panel mounting requires a PMA-55 or
PMA-60 Panel-Mount Adapter. See Figs. 7 and 8. A PMA-
60 meets the AS/NZS 2081:2011 IP53 requirement and
includes tamper-resistant security screws to prevent changes
to the SE-703 front-panel settings.
Use terminal 11 (L1) as the line terminal on ac systems or
the positive terminal on dc systems. Use terminal 10 (L2/N)
as the neutral terminal on ac systems or the negative terminal
on dc systems. Connect terminal 9 ( ) to earth.
Pass the phase conductors through the EFCT window
and position them in the centre of the opening¾for
4-wire and single-phase systems, also pass the neutral
conductor through the EFCT window, as shown in Figs. 2
and 3.Do not pass earth conductors through the EFCT
window. In applications that require shields or drain wires
to pass through the EFCT window, return them through the
EFCT window before connecting them to earth. Connect
the EFCT current sensor to terminals 4 and 5, connect the
shield to terminal 5, and earth terminal 5. See Figs. 4, 5,
and 6 for EFCT-series current-sensor dimensional
drawings.
Remove the connection to terminal 9 for dielectric-
strength testing.
FIGURE 2. Typical Connection Diagrams.

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SE-703 Earth-Leakage Monitor Rev. 12-B-092117
FIGURE 3. Typical Three-Phase Starter Connection.

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FIGURE 4. EFCT-1 Outline and Mounting Details.

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FIGURE 5. EFCT-2 Outline and Mounting Details.

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FIGURE 6. EFCT-26 Outline and Mounting Details.

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FIGURE 7. PMA-55 Panel-Mount Adapter.

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FIGURE 8. PMA-60 Panel-Mount Adapter.

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FIGURE 9. PGA-0500 Analog Percent Current Meter.
FIGURE 10. TRIP Relays Maximum Switching Capacity.

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4. TECHNICAL SPECIFICATIONS
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%)
03 Option...............................2.5 VA, 24 Vac,
(+15%, -40%), 50/60 Hz
Trip-Level Settings......................25, 30, 45, 60, 80, 110,150,
200, 300, and
500 mA
Trip-Time Settings ......................INST, 100, 150, 200, 250,
300, 350, 400, 450, and 500
ms
Accuracies: (1)
Trip Level:(2)
SE-703-0x...........................10% of setting
SE-703-0x-00 .....................10% of setting
SE-703-0x-02 .....................+0, -20% of setting
Trip Time (3) ...........................+0, -20% of setting
INST Setting ............... < 50 ms
Discrimination Time................ ³75% of trip time setting,
Minimum off time 25 ms
Input:
Algorithms.............................DFT Digital or Peak
DFT 3 dB
Frequency Resp.....................32 to 86 Hz
Peak 3 dB
Frequency Resp.....................20 to 420 Hz
CT ..........................................EFCT Series
Thermal Withstand:
Continuous ........................ 25 A Earth-Fault Current
1-Second............................ 400 A Earth-Fault Current
Analog Output:
Range.....................................0 to 5 V, 10 mV per mA
Output Impedance.................220 W
Reset ............................................Front-Panel Button and
Remote, N.O. Contact
Functional Test............................Front-Panel Button
Output Relay 1 and Relay 2:
Contact Configuration
SE-703-0x.........................Relay 1 only, Isolated N.O.
and N.C.
SE-703-0x-00,
SE-703-0x-02 ...................N.O. and N.C. (Form-C),
Isolated
Operating Mode
SE-703-0x.........................Fail-Safe
SE-703-0x-00 ...................Fail-Safe
SE-703-0x-02 .....................Fail-Safe or Non-Fail-Safe
CSA/UL Contact Rating ..... 8 A General Use,
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
Trip Mode....................................Latching
Terminals.....................................Wire Clamping,
24 to 12 AWG
(0.2 to 2.5 mm2) conductors
Tightening Torque...............0.40 N·m (3.54 lbf·in)
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)

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Rev. 12-B-092117
Humidity................................93% Non-Condensing
Altitude ..................................5,000 m (16,404’)
maximum
Overvoltage Category ...........II
Pollution Degree....................2
Enclosure Rating ...................IP20
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 IEC 60255-26:2013
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
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....IEC 61000-4-8
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
Compliance:
Option SE-703-0x................AS/NZS 2081:2011
Option SE-703-0x-00 ..........AS/NZS 2081:2011
Option SE-703-0x-02 ..........AS/NZS 2081:2002
Certification.................................CSA, Canada and USA
UL Listed
Australia
FCC
CE, European Union
CSA C22.2 No.14 Industrial Control Equipment
UL 508 Industrial Control Equipment
UL 1053 Ground Fault Sensing and Relaying Equipment
Australia, Regulatory Compliance Mark (RCM)
CE Low Voltage Directive
IEC 61010-1:2010/AMD1:2016
FCC CFR47, Part 15, Subpart B,
Class A – Unintentional Radiators
NOTES:
(1) At 50 or 60 Hz.
(2) Maximum lead resistance of 2 W.
(3) Trip Time at 1.5 x trip-level setting.

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5.ORDERING INFORMATION
EFCT-1 .....................................Earth-Fault Current Sensor,
82 mm (3.2”) window
EFCT-2 .....................................Earth-Fault Current Sensor,
with Flux Conditioner 139
mm (5.5”) window
EFCT-26......................................Earth-Fault Current Sensor,
26 mm (1.0”) window
EFCT-1FC...................................Flux Conditioner, 70 mm
(2.7”) window
PGA-0500....................................Analog Percent Current
Meter (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(1)and
two thumb screws.
AC700-HW-00............................TR20 tamper-resistant Torx,
0.25” insert bit
AC700-HW-01............................TR20 tamper-resistant Torx
driver
PMA-3 .........................................Adapter Plate, GEC/MCGG
PMA-6 .........................................Adapter Plate,
FPL-GFRM
PMA-15 .......................................Adapter Plate, MGFR
Consult factory for custom mounting adapters.
Startco Pty. Australian Current Sensors
EFCT-5RF ................................Earth-Fault Current Sensor,
60 mm (2.4”) window
EFCT-6RF ................................Earth-Fault Current Sensor,
85 mm (3.3”) window
EFCT-7RF ................................Earth-Fault Current Sensor,
112 mm (4.4”) window
EFCT-8RF ................................Earth-Fault Current Sensor,
140 mm (5.5”) window
EFCT-9RF...................................Earth-Fault Current Sensor,
160 mm (6.3”) window
EFCT-10RF.................................Earth-Fault Current Sensor,
200 mm (7.9”) window
For additional information and to order EFCT-XRF sensors,
contact [email protected].
NOTES:
(1) Tamper-resistant screws must be used for AS/NZS
2081:2011 compliance.
6. WARRANTY
The SE-703 Earth-Leakage 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-
703 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.
7.EARTH-FAULT PERFORMANCE TEST
Some jurisdictions require periodic earth-fault
performance tests. A test-record form is provided for
recording the date and the results of the performance tests.
The following earth-fault system tests are to be conducted by
qualified personnel:
a) Evaluate the interconnected system in accordance with the
overall equipment manufacturer’s detailed instructions.
b) Verify proper location of the earth-fault current sensor.
Ensure the cables pass through the earth-fault-current-
sensor window. This check can be done visually with
knowledge of the circuit. The connection of the current-
sensor secondary to the SE-703 is not polarity sensitive.
c) Verify that the system is correctly earthed and that
alternate earth paths do not exist that bypass the current
sensor. High-voltage testers and resistance bridges can be
used to determine the existence of alternate earth paths.
d) Verify proper reaction of the circuit-interrupting device in
response to a simulated or controlled
earth-fault current. To simulate earth-fault current, use
CT-primary current injection. Fig. 11 shows a test circuit
using an SE-400 Ground-Fault-Relay Test Unit. The SE-
400 has a programmable output of 0.5 to 9.9 A for a
duration of 0.1 to 9.9 seconds.
Fig. 11 shows the use of resistors that reduce the injected
current to 10% of the SE-400 setting. Set the test current
to 120% of the SE-703 setting. Inject the test current
through the current-sensor window for at least 2.5
seconds. Verify that the circuit under test has reacted
properly. Correct any problems and re-test until the
proper reaction is verified.

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e) Record the date and the results of the test on the attached
test-record form.
NOTE: Do not inject test current directly into CT-input
terminals 4 and 5.
FIGURE 11. Earth-Fault-Test Circuit.
TABLE 1. EARTH-FAULT-TEST RECORD
DATE
TEST RESULTS
Retain this record for the authority having jurisdiction.