Littelfuse SE-135 Ground Fault Ground Check Monitor User Manual

: June 13, 2024
: Littelfuse

Table of Contents

Littelfuse SE-135 Ground Fault Ground Check Monitor
Product Usage Instructions
GENERAL
OPERATION
- GROUND-FAULT CIRCUIT
INDICATION
INSTALLATION
TECHNICAL SPECIFICATIONS
- CURRENT SENSORS
ORDERING INFORMATION
WARRANTY
TEST PROCEDURES
- GROUND-CHECK TRIP TESTS
MANUAL REVISION HISTORY
- REVISION 3-D-090816
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

Littelfuse SE-135 Ground Fault Ground Check Monitor

Littelfuse-SE-135-Ground-Fault-Ground-Check-Monitor-
product Product Information

The SE-135 is a ground-fault ground-check monitor designed to detect and monitor ground faults in electrical systems. It is manufactured by Littelfuse Startco and is printed in Canada. The monitor is equipped with a SE-TA12A- series termination assembly that provides the necessary compensation to meet system specifications.

Product Usage Instructions

Ground-Fault Circuit:
- GF Trip Time Setting: This setting allows you to adjust the trip time for ground-fault detection.
- GF Trip Level Setting: This setting allows you to adjust the trip level for ground-fault detection.
Testing Procedures:
- Latching Ground-Check Trip Test: Perform this test to check the latching ground-check trip functionality.
- Non-Latching Ground-Check Trip Test: Perform this test to check the non-latching ground-check trip functionality.
- Trip Relay Fail-Safe Mode Test: Perform this test to verify the fail-safe mode of the trip relay.
- Current-Sensor-Verification Test: Perform this test to verify the accuracy and functionality of the current sensors.
- SE-TA12A-Series Termination Assembly Tests: Perform these tests to ensure the proper functioning of the termination assembly.
- Ground-Fault Performance Test: Perform this test to evaluate the performance of the ground-fault detection system.
Additional Components:
- SE-134-SMA Surface Mount Adapter and SE-135 Surface-Mounting Details: Use these components for surface mounting of the SE-135 monitor.
- SE-IP65CVR-G Weatherproof Cover Outline and Installation: Use this weatherproof cover to protect the SE-135 monitor in outdoor installations.
- SE-CS10 and SE-CS40 Current Sensors: These current sensors are compatible with the SE-135 monitor for accurate current measurement.
- SE-TA12A and SE-TA12A-WL Termination Assemblies: These termination assemblies provide compensation required for system specifications.
- RK-132 Remote Indication and Reset Kit: This kit allows remote indication and reset functionality for the SE-135 monitor.
- PPI-600V Parallel-Path Isolator: Use this isolator for parallel-path protection in the electrical system.

Refer to the SE-135 Revision History in Appendix A for detailed information on product revisions.

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.

GENERAL

The SE-135 is a microprocessor-based, combination ground-fault and ground-wire monitor for resistance-grounded systems. It has a switching power supply that accepts a wide range of ac and dc voltages, and its specifications apply over an industrial temperature range at high humidity. The SE-135 meets the IEEE surge-withstand-capability tests (oscillatory and fast transient) for protective relays and relay systems. Isolated, normally open and normally closed contacts are provided for contactor control or for shunt or undervoltage operation in a breaker-trip circuit. All operating conditions are clearly annunciated and two Form C contacts are provided for remote indication. The SE-135 is housed in an anodized extruded-aluminum enclosure, and all connections are made with plug-in, wire-clamping terminal blocks. Provision is made for both panel and surface mounting. The ground-fault circuit detects fundamental-frequency, zero-sequence current with a window- type current sensor and it verifies that the current sensor is connected and not shorted. A definite-time characteristic with 11 trip levels and 11 trip times allows coordination in virtually any resistance-grounded system. Although other current sensors may satisfy the verification circuit, only SE- CS10-series and SE-CS40-series sensors have characteristics that meet system specifications. Current-sensor verification can be disabled for a ground- check-only application. The ground-check circuit has an open-circuit voltage of 30 Vdc, which is not a hazard to personnel, and it has an output drive current above 100 mA for optimum performance in slip-ring, commutated-load, and high-induced-ac applications. Features include an externally accessible ground-check fuse, a resistance-insertion test, 3-kV isolation between the ground-check loop and the monitor electronics, and a PPI-600V accessory for parallel-ground-path rejection. A PPI-600V will also eliminate intermachine arcing and prevent stray ac and dc currents from flowing in the monitored ground wire. Unlike ground-check circuits using other termination devices, and especially those with phase-reversal switches, a ground-check circuit using a termination device with a Zener characteristic is capable of loop measurements that are independent of current in the phase conductors. The SE-135 ground- check circuit recognizes the SE-TA12A-series 12-volt Zener characteristic as a valid end-of-line completion. This is the only passive characteristic that will satisfy the ground-check circuit’s multi-level drive, allow induced currents to circulate in the ground-check loop, survive a phase-to-ground- check fault, and clamp the ground-check voltage during the fault. Although a standard 12-volt Zener diode may engage the SE-135’s ground-check circuit, only an SE-TA12A-series termination assembly has the compensation required to meet system specifications.

OPERATION

GROUND-FAULT CIRCUIT

GF TRIP TIME SETTING

The ground-fault circuit has a definite-time characteristic with 11 settings from 0.1 to 2.5 seconds. Time-coordinated ground-fault protection requires the trip time to be longer than the trip time of downstream ground-fault devices.

GF TRIP LEVEL SETTING
The trip level of the ground-fault circuit is switch selectable with 11 settings from 0.5 to 12.5 A for the SE-CS10-series CT and from 2 to 50 A for the SE-CS40-series CT. A minimum tripping ratio of five is recommended to achieve at least 80% winding protection, and this requires the trip level to be no more than 20% of the grounding-resistor let-through current. A ground- fault trip is latched, requiring a reset. A current-sensor failure will also cause a ground-fault trip. See Section 3.1. If the SE-135 is operated in a ground-check-only application and an SE-CS10 is not connected, connect terminals 17 and 18 to disable sensor verification. See Fig. 1.

GROUND-CHECK CIRCUIT
The ground-check loop consists of the outgoing ground-check conductor, quick- coupler connections, the SE-TA12A-series termination assembly, the SE-TA12A connection to equipment frame or ground bus, the ground-return path, and the SE-135 cable-ground-terminal connection to substation ground. The SE-135 detects a valid ground-check loop when an SE-TA12A-series termination assembly is detected in the loop and loop resistance is less than 28 ohms (45 ohms for XGC option). The loop is not valid if open (or high resistance), or if the ground-check conductor is shorted to ground. When the ground-check loop is valid, the SE-135 ground-check circuit can be tested by pressing the GC TEST button or by shorting GC TEST terminals 11 and 12. This test invalidates the loop by inserting 47 ohms (75 ohms for XGC option) in the ground-check loop and a trip should occur in less than 250 ms. The ground-check circuit is usually operated in the non-latching mode; however, it can be operated in the latching mode by connecting terminals 14 and 15. The ground-check circuit is protected by a 1.5-A time-delay fuse (F1). If the SE-135 is used in a ground- fault-only application, an SE-TA12A must be connected to the ground-check and cable-ground terminals to validate the ground-check circuit. See Fig. 1. The typical maximum distance of a trailing cable is 5.0 km (3.1 miles) for the standard model and up to 10 km (6.3 miles) for the XGC option. Several factors may limit the maximum distance of the cable, including the ground-check wire gauge, and induced ac current in the ground-check loop.

RESET
All ground-fault trips are latching and ground-check trips can be latching or non-latching. To reset ground-fault trips or latching ground-check trips, press the RESET button or connect the RESET terminals 9 and 10. See Fig. 1. Cycling the supply voltage will also reset ground-fault trips; however, if the ground-check circuit is configured for latching fail-safe operation, the ground-check circuit will trip when supply voltage is applied. The single-shot reset circuit responds only to a momentary closure; a jammed or shorted button will not maintain a reset signal. The front-panel RESET button is inoperative when remote-reset terminals 9 and 10 are connected. See Section 4.5.

TRIP RELAY
Isolated, normally open (Trip A, terminals 24 and 25) and normally closed (Trip B, terminals 22 and 23) contacts are provided for use in a contactor- or breaker-control circuit. With no connection between terminals 12 and 13, the SE-135 trip relay operates in the fail-safe mode. This mode is used with undervoltage devices where the trip relay energizes and its normally open contact closes if the ground-fault and ground-check circuits are not tripped. This mode is recommended because:

Undervoltage devices release if supply voltage fails.
Undervoltage ground-check circuits do not allow the power circuit and open cable couplers to be energized until the ground-check loop is verified. The fail-safe mode of operation of the SE-135 trip relaycan be used for shunt-trip circuits with a stored-energy trip source. In this case, the normally closed trip contact is used—the contact opens when the SE-135 is energized and the ground-fault and ground-check circuits are not tripped. Care must be taken to ensure safe and correct operation during power up and power down. Connect terminals 12 and 13 for non-fail-safe trip relay operation with shunt-trip devices. In this mode, the normally open trip contact is used—the trip contact is closed when a ground-fault or ground-check trip occurs. Shunt-trip circuits are not fail-safe and are not recommended because:
Shunt-trip devices do not operate if supply voltage fails.
Shunt-trip ground-check circuits allow the power circuit and open cable couplers to be energized for a short interval after supply voltage is applied.

CAUTION: The SE-135 is not a lock-out device. Follow lock-out procedures for maintenance.

NETWORK COMMUNICATIONS
An IEEE 802.3 port with Modbus® TCP Ethernet protocol is available. The SE-135 default IP address is 10.0.0.1. Use SE-MON-GFGC to change the IP address, monitor connected SE-135 units, and to issue remote commands. SE-MON-GFGC can be downloaded from www.littelfuse.com/relayscontrols. If the computer running SE-MON-GFGC has more than one active network connection, SE-MON-GFGC may not detect the SE-135. Ensure SE-MON-GFGC is not blocked by Windows Firewall by adding it to the Firewall Exceptions list in the Windows Control Panel. On start-up SE-MON-GFGC scans the network for SE-135 units and displays them in a list. Select one from the list and click “Edit” to change the IP address, subnet mask, or description. When selecting an IP address, ensure it is not already in use. Click “Apply” to save the changes. SE-MON-GFGC will pause for five seconds and scan the network again. To view the status of an SE-135, select the unit and click “Monitor”. If a warning appears, the SE-135 may have been set to an IP address that is not accessible by the network. Table 1 shows the SE-135 coil addresses. Table 2 provides the holding registers in 16-bit format. A remote reset can be generated by writing DO1 high for one second and then writing it back to low.

TABLE 1. COIL ADDRESS

COIL ADDRESS	DESCRIPTION	NAME	ATTRIBUTE
00001	GC Status	DI0	Read
00002	GF Status	DI1	Read
00003	Trip Relay	DI2	Read
00018	Remote Reset	DO1	Read/Write

TABLE 2. HOLDING REGISTER ADDRESS

REGISTER ADDRESS	DESCRIPTION	ATTRIBUTE
40301	DI0 – DI11	Read
40303	DO0 – DO5	Read/Write

INDICATION

GROUND FAULT
A red TRIP LED indicates a ground-fault trip and the remote-indication relay GF is energized when the ground-fault circuit is not tripped (fail-safe indication-contact operation). A green SENSOR LED indicates a current sensor is correctly connected. If the SE-CS10- or SE-CS40-series current sensor is disconnected or shorted, the green LED will go out and the ground-fault circuit will trip. If the sensor fault is intermittent, the ground-fault circuit will trip and the green LED will flash to indicate that the trip was initiated by a sensor fault.

NOTE: The SE-CS10- and SE-CS40-series current sensors are 600-V-rated current transformers. When system voltage is above 600 V, ensure conductors passed through the sensor window are insulated to system voltage.

POWER
The green POWER LED indicates that the internal power supply is on.

DIAGNOSTIC ERROR
The red DIAGNOSTIC ERROR LED indicates that an internal error caused the SE-135 to trip. Return the SE-135 to the factory if a reset does not clear the trip. Induced ac current in the ground-check loop can cause the LED to flicker. This is a normal condition and does not indicate a diagnostic error; the ground-check monitoring circuit is not affected.

GROUND CHECK
A red TRIP LED indicates a ground-check trip. A green VALID LED indicates a valid ground-check loop and the remote-indication relay GC is energized when the ground-check loop is valid (fail-safe indication-contact operation). Two yellow LED’s indicate the status of an invalid ground-check loop. OPEN indicates the loop resistance exceeds the trip resistance and SHORT indicates the ground-check conductor is shorted to the ground conductor. A flashing yellow LED indicates the corrected cause of a latched ground-check trip.

INSTALLATION

GENERAL
This ground-fault ground-check monitoring system consists of an SE-135 Monitor, an SE-CS10- or SE-CS40-series Current Sensor, and an SE-TA12A-series Termination Assembly connected as shown in Fig. 1. If required, remote indication and reset can be implemented with standard pilot devices, or with an RK-132 Remote-Indication-and-Reset Kit.

MONITOR
Each SE-135 is packaged with both panel- and surface-mounting hardware. Outline and panel-cutout dimensions for the SE-135 are shown in Fig. 2. To panel mount the SE-135, insert it through the panel cutout and secure it with the four supplied 8-32 locknuts and flat washers.
If an optional SE-IP65CVR-G is used, follow the included installation instructions. See Figs. 4 and 5. All connections to the SE-135 are made through plug-in, wire-clamping terminal blocks for 24 to 12 AWG (0.2 to 2.5 mm2) conductors. Each plug-in terminal block can be secured to the monitor by two captive screws for reliable connections in high-vibration applications. Outline dimensions and mounting details for surface mounting an SE-135 are shown in Fig. 3. Fasten the SE-134-SMA Surface-Mount Adapter to the mounting surface and make connections to the adapter terminal blocks. Follow the instructions in Fig. 3 to install or remove the SE-135. Use terminal 1 (L1) as the line terminal on ac systems or the positive terminal on dc systems. Use terminal 2 (L2/N) as the neutral terminal on ac systems or the negative terminal on dc systems.

NOTE: On revision 4 and newer units, terminal 3 (SPG) is internally connected to terminal 4. For these units an external terminal-3-to-terminal-4 connection is not required, nor is it necessary to remove the terminal-3 connection for dielectric-strength testing.

CURRENT SENSORS
Outline dimensions and mounting details for the SE-CS10- and SE-CS40-series current sensors are shown in Fig. 6. Pass only phase conductors through the sensor window as shown in Fig. 1. If a shield, ground, or ground-check conductor enters the sensor window, it must be returned through the window before it is terminated. Connect the current sensor to terminals 16 and 17. Ground terminal 17. Current-sensor primary and secondary connections are not polarity sensitive. See Section 4.7.

TERMINATION ASSEMBLY
Outline dimensions and mounting details for the SE-TA12A, SE-TA12A-WL, and SE- TA12ASF-WL are shown in Figs. 7 and 8. Install the SE-TA12A at the load to complete the ground-check loop as shown in Fig. 1. Connect terminal G of the SE-TA12A to the equipment frame so that the ground-conductor-to-equipment- frame connection will be included in the monitored loop.

REMOTE OPERATION
Remote indication contacts and a reset input are provided as shown in Fig.

The optional RK-132 Remote Kit is shown in Fig. 9. Connect terminals of the green ground-check indicator to SE-135 terminals 26 and 27 and the red ground- fault indicator to terminals 19 and 21. For remote reset, connect the normally open push-button switch across terminals 9 and 10.

PARALLEL-PATH ISOLATION
A PPI-600V can be used for parallel-path rejection. A PPI-600V will also eliminate inter-machine arcing and prevent stray ac and dc currents from flowing in the monitored ground wire. See Figs. 10 and 11. See Technical Note GC-10 “Parallel Path Isolator” at www.littelfuse.com/relayscontrols, or contact Littelfuse Startco for application details.

FERRITE PLACEMENT
A ferrite kit is included with CE-compliant options only. Where CE compliance is desired, install each ferrite as shown in Fig. 12. If a current sensor is used, connect the shield wire as shown in Fig. 13. Littelfuse-SE-135-Ground-
Fault-Ground-Check-Monitor-fig-1 Littelfuse-SE-135-Ground-Fault-Ground-Check-Monitor-
fig-2 Littelfuse-
SE-135-Ground-Fault-Ground-Check-Monitor-fig-4

NOTES:

DIMENSIONS IN MILLIMETRES (INCHES).
RoHS COMPLIANCE PENDING.
EN 60044-1 COMPLIANT.

Littelfuse-SE-135-Ground-Fault-Ground-Check-Monitor-
fig-7

NOTES:

DIMENSIONS IN MILLIMETRES (INCHES).
MOUNTING SCREWS: M4 OR 8-32.
TERMINAL SCREWS 6-32 × 0.25.

NOTES:

DIMENSIONS SAME AS SE-TA12A.
WIRE LEADS #14 AWG (2.08 mm?).
CAN BE IMMERSED IN GLYCOL.

NOTES:

THE PARALLEL-PATH ISOLATOR IS NOT POLARIZED. EITHER FLANGE CAN BE CONNECTEDTO CHASSIS.
THE OUTGOING GROUND MUST BE ISOLATED FROM THE CHASSIS GROUND BUS. IF A FLANGE-MOUNTED RECEPTACLE IS USED, VERIFY THAT THE FLANGE IS ISOLATED FROMTHE GROUND PIN, AND
- USE A MATING PLUG WITH A NON-METALLIC HOUSING, OR
- ISOLATE THE FLANGE FROMTHE CHASSIS IF THE MATING PLUG HAS A METALLIC HOUSING.
CABLE PLUGS AND RECEPTACLES WITH GROUNDED METAL HOUSING MUST BE ISOLATED FROM GROUND TO PREVENT PARALLEL GROUND PATHS.
FOR SYSTEMS ABOVE 600 VAG, CONNECT A V131DA40 MOV ACROSS THE PPI-600V.

Littelfuse-SE-135-Ground-Fault-Ground-Check-Monitor-
fig-13

TECHNICAL SPECIFICATIONS

SE-135

Supply:

Option 0 …………………………… 25 VA, 120-240 Vac
- (+10, -45%), 50-400 Hz;
- 15 W, 110-250 Vdc
- (+10, -25%)
Option 1 ………………………… 15 W, 24-48 Vdc
- (+50, -25%);
- 20 VA, 48 Vac
- (+10, -55%), 50-100 Hz

Ground-Fault Circuit:

Digital Filter …………………… 50 to 60 Hz, Bandpass
- 3 dB Frequency Response … 30 to 90 Hz
Trip-Level Settings:
- SE-CS10-x ……………………. .50, .75, 1.0, 1.5, 2.0, 2.5, 3.0, 5.0, 7.5, 10.0, and 12.5 A
- SE-CS40-x ……………………. 2, 3, 4, 6, 8, 10, 12, 20, 30, 40, and 50 A
- Trip-Time Settings ………….. .10, .20, .30, .40, .50, .70, 1.0, 1.3, 1.6, 2.0, and 2.5 s

Thermal Withstand:

SE-CS10-x …………………… 150 A Continuous 1,000 A for 2.5 s (Ground-Fault Current)
SE-CS40-x ……………………. 600 A Continuous 4,000 A for 2.5 s (Ground-Fault Current)
Sensor Lead Resistance ……. 2 Ω maximum

Trip-Level Accuracy:

SE-CS10-x …………………… 5% or 0.1 A
SE-CS40-x …………………… 5% or 0.4 A
Trip-Time Accuracy ………… +50, -15 ms
Sensor Verification …………. Enabled or Disabled
Sensor-Fault Detection …….. Open and Short
Trip Mode ……………………… Latching

Ground-Check Circuit:

Open-Circuit Voltage ………. 30 Vdc
Output Impedance …………… 136 Ω
Loop Current ………………….. 105 mA
Induced-ac Withstand ……… 60 Vac Continuous,
- 120 Vac for 10 s,
- 250 Vac for 0.25 s
Pull-in Time …………………… ≤ 1.5 s

Trip Resistance:

Standard ………………………. 28 Ω ± 10%
XGC Option ………………… 45 Ω ± 10%

Trip Time:

Standard at 50 Ω …………… 220 ± 30 ms
XGC Option at 75 Ω …….. 220 ± 30 ms
Short Detection ………………. Yes
Isolation …………………………. 3 kV, 60 Hz, 1 s
Test ……………………………….. Front-Panel Button and Remote, N.O. Contact
Fuse Rating (F1) …………….. 1.5 A, 500 Vac, Time Delay
Fuse Part Number …………… FNQ 1½ Buss Fusetron
Trip Mode ……………………… Latching or Non-Latching

Trip Relay:

CSA/UL Contact Rating ….. 8 A Resistive 250 Vac,
- 5 A 30 Vdc,
- 0.25 HP,
- B300 Pilot Duty

Supplemental Contact Ratings:

Make/Carry (0.2 s) ……….. 30 A
- Break dc ……………………… 75 W Resistive,
- 35 W Inductive (L/R < 0.04)
Break ac ………………………. 2,000 VA Resistive,
- 1,500 VA Inductive
- (PF > 0.4)
Subject to maximums of 8 A and 250 V (ac or dc)
Contact Configuration ……… Isolated N.O. and N.C. Contacts
Operating Mode ……………… Fail-Safe or Non-Fail-Safe

Maximum Switching

Capacity ………………………… Fig. 14

Remote-Indication Relays:

CSA/UL Contact Rating ….. 8 A Resistive 250 Vac, 8 A 30 Vdc

Supplemental Contact Ratings:

Make/Carry (0.2 s) ……….. 20 A
Break dc ……………………… 50 W Resistive, 25 W Inductive (L/R < 0.04)
Break ac ………………………. 2,000 VA Resistive, 1,500 VA Inductive (PF > 0.4)
Subject to maximums of 8 A and 250 V (ac or dc)
Contact Configuration ……… N.O and N.C. (Form C)
Operating Mode ……………… Fail-Safe

Maximum Switching

Capacity ………………………… Fig. 15
Trip Reset …………………………… Front-Panel Button and Remote, N.O. Contact
Terminal Block Rating …………. 10 A, 300 Vac, 12 AWG (2.5 mm2)
PWB Conformal Coating ……… MIL-1-46058 qualified, UL QMJU2 recognized
Mounting Configuration ……….. Panel Mount and Surface Mount

Dimensions:

Height ……………………………… 213 mm (8.4”)
Width ………………………………. 99 mm (3.9”)
Depth ………………………………. 132 mm (5.2”)
Shipping Weight ………………….. 2.3 kg (5.1 lb)

Environment:

Operating Temperature ……… -40 to 60°C (-40 to 140°F)
Storage Temperature …………. -55 to 80°C (-67 to 176°F)
Humidity ……………………….. 85% Non-Condensing
IP Rating …………………………….. IP40 when panelmounted, IP20 otherwise
Surge Withstand ………………….. ANSI/IEEE 37.90.1-2002 (Oscillatory and Fast Transient)

EMC Tests:
Verification tested in accordance with EN 60255-26:2009.

Radiated and Conducted

Emissions ………………………. CISPR 22:2008-09 Class A
Current Harmonics and
Voltage Fluctuations ……….. 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, 80-1,000 MHz, 80% AM (1 kHz) 10 V/m, 1.0 to 2.7 GHz, 80% AM (1 kHz)
Fast Transient …………………. IEC 61000-4-4 Class A: ± 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
Power Frequency ……………. IEC 60255-22-7
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
Certification ………………………… CSA Canada and USA

To: 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 (3rd Edition) FCC CFR47, Part 15, Subpart B, Class A – Unintentional Radiators

Compliance …………………………. RoHS Pending

CURRENT SENSORS

Environment:

Operating Temperature ……. -40 to 60°C (-40 to 140°F)
Storage Temperature ……….. -55 to 80°C (-67 to 160°F)

SE-CS10-2.5:

Current Ratio ………………….. 1,000:5 A
Insulation ………………………. 600-V Class
Window Diameter …………… 63 mm (2.5”)
Shipping Weight …………….. 690 g (1.5 lb)

SE-CS10-4:

Current Ratio ………………….. 1,000:5 A
Insulation ………………………. 600-V Class
Window Diameter …………… 108 mm (4.2”)
Shipping Weight …………….. 1.9 kg (4.3 lb) SE-CS10-6:
Current Ratio ………………….. 1,000:5 A
Insulation ………………………. 600-V Class
Window Diameter …………… 160 mm (6.3”)
Shipping Weight …………….. 2.2 kg (4.8 lb)

SE-CS10-8:

Current Ratio ………………….. 1,000:5 A
Insulation ……………………….. 600-V Class
Window Diameter …………… 209 mm (8.2”)
Shipping Weight …………….. 2.2 kg (4.8 lb)

SE-CS40-6:

Current Ratio ………………….. 800:1 A
Insulation ……………………….. 600-V Class
Window Diameter …………… 160 mm (6.3”)
Shipping Weight …………….. 1.8 kg (4.0 lb)
Certification ………………………… CE(1), European Union
Compliance …………………………. IEC 60044-1 RoHS Pending

NOTES:

When connected to an SE-135.

TERMINATION ASSEMBLIES

SE-TA12A:

Characteristic …………………. 12-V Zener, Temperature Compensated
Circuit Type …………………… High-Current Shunt Regulator
Reverse Voltage ……………… 12 ±0.03 Vdc @ 100 mA
Forward Voltage …………….. 0.5 ±0.1 Vdc @ 100 mA
Operating Temperature ……. -40 to 60°C (-40 to 140°F)
Current Range ………………… 2 mA to 25 A

Maximum Clamping

Voltage ………………………….. 55 V @ 250 A, 5×20 μs Pulse
Power Rating ………………….. 50 W
Screw Terminal ………………. 6-32 x 0.25
Dimensions ……………………. 105 x 40 x 41.5 mm (4.13 x 1.57 x 1.63”)
Shipping Weight …………….. 300 g (0.7 lb)

SE-TA12A-WL:

Characteristic …………………. 12-V Zener, Temperature Compensated
Circuit Type …………………… High-Current Shunt Regulator
Reverse Voltage ……………… 12 ±0.03 Vdc @ 100 mA
Forward Voltage …………….. 0.5 ±0.1 Vdc @ 100 mA
Operating Temperature ……. -40 to 60°C (-40 to 140°F)
Current Range ………………… 2 mA to 25 A Maximum Clamping
Voltage ………………………….. 55 V @ 250 A, 5×20 μs Pulse
Power Rating ………………….. 50 W
Wire Leads …………………….. 14 AWG (2.08 mm2), 356 mm (14”)
Dimensions ……………………. 105 x 40 x 22.2 mm (4.13 x 1.57 x 0.87”)
Shipping Weight …………….. 300 g (0.7 lb)

SE-TA12ASF-WL:

Characteristic …………………. 12-V Zener, Temperature Compensated
Circuit Type …………………… High-Current Shunt Regulator
Reverse Voltage ……………… 12 ±0.03 Vdc @ 100 mA
Forward Voltage …………….. 0.5 ±0.1 Vdc @ 100 mA
Operating Temperature ……. -40 to 60°C (-40 to 140°F)
Current Range ………………… 2 mA to 15 A Maximum Clamping
Voltage ………………………….. 55 V @ 250 A, 5×20 μs Pulse
Power Rating ………………….. 12 W
Wire Leads …………………….. 18 AWG (0.82 mm2), 300 mm (11.8”)
Dimensions ……………………. 58.8 x 19 x 12.7 mm (2.32 x 0.75 x 0.5”)
Shipping Weight …………….. 45 g (0.1 lb)
Certification ………………………… CSA Canada and USA

NOTES:

When connected to an SE-135.

ORDERING INFORMATION

All options include CE/RCM unless otherwise stated. CE/RCM models include a ferrite kit.
CE/RCM not available.
Not available with Ethernet network communications option.

Ground-Check Termination:

SE-TA12A …………………….. 50-W Termination Assembly with Screw Terminals
SE-TA12A-WL ………………. 50-W Termination Assembly with Wire Leads
SE-TA12ASF-WL ………….. 12-W Small-Format Termination Assembly with Wire Leads

Current Sensors:

SE-CS10-2.5 ………………….. Current Sensor, 63 mm (2.5”) window
SE-CS10-4 …………………….. Current Sensor, 108 mm (4.2”) window
SE-CS10-6 …………………….. Current Sensor, 160 mm (6.3”) window
SE-CS10-8 …………………….. Current Sensor, 209 mm (8.2”) window
SE-CS40-6 …………………….. Current Sensor, 160 mm (6.3”) window

Parallel Path Isolator

PPI-600V ……………………….. For system voltages up to 600 Vac

Accessories:

RK-132 ………………………….. Remote Indication and Reset, includes two 24- 120-V pilot lights, a reset push button, and legend plates
SE-IP65CVR-G ……………… Hinged transparent cover, IP65
SE-134-SMA …………………. Surface-Mount Adapter, included with SE-135
SE-134-HDWR ………………. Hardware Kit (excludes ferrites and SE-134-SMA), included with SE-135

WARRANTY

The SE-135 Ground-Fault Ground-Check 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-135 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.

TEST PROCEDURES

GROUND-CHECK TRIP TESTS

LATCHING GROUND-CHECK TRIP TEST
Connect the monitor, current sensor and termination assembly as shown in Fig 16. Connect terminals 14 and 15 for latching operation. With supply voltage applied, the POWER, SENSOR, and VALID LED’s will be on. Open the ground-check loop by removing either the GC or G connection between the monitor and the termination assembly (pressing the faceplate GC TEST button will also perform an open-ground-check test). The monitor will trip. The trip contacts (terminals 22-23 and 24-25) and the ground-check indication contacts (terminals 26-27 and 26-28) will change state. The VALID LED will be off, and both the GROUND CHECK TRIP and the OPEN LED’s will be on. Reconnect the ground-check loop. The VALID and TRIP LED’s will be on and the OPEN LED will be flashing. The TRIP contacts (terminals 22-23 and 24-25) will remain latched and ground-check indication contacts (terminals 26-27 and 26-28) will change state. Reset the monitor. Short the ground-check loop by connecting G to GC. The monitor will trip. The trip contacts (terminals 22-23 and 24-25) and the ground-check indication contacts (terminals 26-27 and 26-28) will change state. The VALID LED will be off, and both the GROUND CHECK TRIP and the SHORT LED’s will be on. Remove the short from G to GC. The VALID and TRIP LED’s will be on and the SHORT LED will be flashing. The TRIP contacts (terminals 22-23 and 24-25) will remain latched and ground-check indication contacts (terminals 26-27 and 26-28) will change state. Reset the monitor.

NON-LATCHING GROUND-CHECK TRIP TEST
Connect the monitor, current sensor and termination device as shown in Fig. 16. With supply voltage applied, the POWER, SENSOR, and VALID LED’s will be on. Open the ground-check loop by removing either the GC or G connection between the monitor and the termination assembly (pressing the faceplate GC Test button will also perform an open circuit test). The monitor will trip. The trip contacts (terminals 22-23 and 24-25) and the ground-check indication contacts (terminals 26-27 and 26-28) will change state. The VALID LED will be off, and both the GROUND CHECK TRIP and the OPEN LED’s will be on. Reconnect the ground-check loop. The monitor will reset.Short the ground-check loop by connecting G to GC. The monitor will trip. The trip contacts (terminals 22-23 and 24-25) and the ground-check indication contacts (terminals 26-27 and 26-28) will change state. The VALID LED will be off, and both the GROUND CHECK TRIP and the SHORT LED’s will be on. Remove the short from G to GC. The monitor will reset.

TRIP RELAY FAIL-SAFE MODE TEST
Connect the monitor, current sensor and termination device as shown in Fig. 16. With supply voltage applied, the POWER, SENSOR, and VALID LED’s will be on. The output contacts between terminals 22 and 23 will be open and between 24 and 25 will be closed. Remove the supply voltage. The output contacts between terminals 22 and 23 will close and the output contacts between terminals 24 and 25 will open.

CURRENT-SENSOR-VERIFICATION TEST
Connect the monitor, current sensor and termination device as shown in Fig. 16. With supply voltage applied, the POWER, SENSOR, and VALID LED’s will be on. Open the current-sensor circuit by disconnecting one of the sensor leads. The monitor will trip. The trip contacts (terminals 22-23 and 24-25) and the ground-fault indication contacts (terminals 19-20 and 19-21) will change state. The GROUND FAULT TRIP LED will be on and the SENSOR LED will be off. Reconnect the current sensor. The GROUND FAULT TRIP LED will stay on and the SENSOR LED will flash. The output contacts will remain latched. Reset the monitor. Short the current sensor by connecting terminals 16 and The monitor will trip. The trip contacts (terminals 22-23 and 24-25) and the ground-fault indication contacts (terminals 19-20 and 19-21) will change state. The GROUND FAULT TRIP LED will be on and the SENSOR LED will be off. Remove the short from terminals 16 and 17. The GROUND FAULT TRIP LED will stay on and theSENSOR LED will flash. The output contacts will remain latched. Reset the monitor.

SE-TA12A-SERIES TERMINATION ASSEMBLY TESTS
Apply 24 Vdc across the series combination of a 100-Ω, 5-W current-limiting resistor and the termination assembly, as shown in Fig. 17. In the reverse biased test, the voltage should be 12 V across the termination assembly terminals. In the forward biased test, the voltage across the termination assembly terminals should be between 0.3 and 0.9 V.

GROUND-FAULT PERFORMANCE TEST

To meet the requirements of the National Electrical Code (NEC), as applicable, the overall ground-fault protection system requires a performance test when first installed. A written record of the performance test is to be retained by those in charge of the electrical installation in order to make it available to the authority having jurisdiction. A test-record form is provided for recordingthe date and the final results of the performance tests. The following ground-fault system tests are to be conducted by qualified personnel:

Evaluate the interconnected system in accordance with the overall equipment manufacturer’s detailed instructions.
Verify proper location of the ground-fault current sensor. Ensure the cables pass through the groundfault- current-sensor window. This check can be done visually with knowledge of the circuit. The connection of the current-sensor secondary to the SE- 135 is not polarity sensitive.
Verify that the system is correctly grounded and that alternate ground paths do not exist that bypass the current sensor. High-voltage testers and resistance bridges can be used to determine the existence of alternate ground paths.
Verify proper reaction of the circuit-interrupting device in response to a simulated or controlled ground-fault current. To simulate ground-fault current, use CT-primary current injection. Fig. 14 shows a test circuit using Littelfuse Startco Ground- Fault-Relay Test Units. The SE-400 has a programmable output of 0.5 to 9.9 A for a duration of 0.1 to 9.9 seconds. Set the test current to 120% of GF TRIP LEVEL. The SE-100T provides a test current of 0.65 or 2.75 A for testing 0.5- and 2.0-A trip levels. 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.
Record the date and the results of the test on the attached test-record form.

TABLE 3. GROUND-FAULT-TEST RECORD