Protection Relays & Controls

© 2014 Littelfuse Protection Relays & Controls

Rev: 4-D-102214

SE-134C Based on Manual Rev: 7-C-100114

SE-135 Based on Manual Rev: 3-C-100314

Littelfuse.com/se-134c, Littelfuse.com/se-135

Trailing Cable Protection–Ground-Fault Ground-Check Monitoring

SE-134C, SE-135 SERIES

Ground-Fault Ground-Check Monitor

Description

The SE-134C/SE-135 is a microprocessor-based, combination

ground-wire monitor and ground-fault relay for resistance-

grounded or solidly grounded systems. It continuously

monitors the integrity of the ground conductor to protect

portable equipment from hazardous voltages caused by ground

faults. The SE-134C/SE-135 is field proven in monitoring trailing

cables on large mobile equipment such as drag-lines, mining

shovels, shore-to-ship power cables, dock-side cranes, stacker-

reclaimers, submersible pumps, and portable conveyors.

Specifications

IEEE Device Numbers

Checking or Interlocking Relay (3GC),

Ground fault (50G/N, 51G/N)

Input Voltage

65-265 Vac; 85-275 Vdc; 18-72 Vdc

Dimensions

H 213 mm (8.4"); W 99 mm (3.9"); D 132 mm (5.2");

Trip Level Settings

0.5-12.5 A for SE-CS10, 2 - 50 A for SE-CS40

Trip Time Settings

0.1-2.5 s

Contact Operating Mode

Selectable fail-safe or non-fail-safe

Harmonic Filtering

Standard feature

Test Button

Standard feature

Reset Button

Standard feature

Output Contacts

Isolated Form A and Form B, Two Form C

Approvals

CSA certified, UL Listed (E340889),

Conformally Coated

Standard feature

Warranty

5 years

Mounting

Panel, Surface

GC Trip Resistance

28Ω (Standard), 45Ω (XGC Option)

ORDERING

NUMBER

OPTION

POWER SUPPLY

COMM

SE-134C

Blank or

XGC

0=120/240

Vac/Vdc

0=None

SE-135

Blank or

XGC

0=120/240

Vac/Vdc

0=None

Ordering Information

(1) CE/C-Tick not available.

(2) Not available with Ethernet option 3.

(3) See ordering information.

See Current Transformer Selection Guide and Accessory Information.

Simplified Circuit Diagram

SE-CS10 or SE-CS40 Series Ground-Fault

Current Transformer

Required zero-sequence current transformer

detects ground-fault current.

SE-TA6A Series, SE-TA12A Series

Termination Assembly

Required termination assembly; temperature

compensated.

Accessories

A

B

FEATURES

BENEFITS

Adjustable pickup

(0.5-12.5 A for SE-CS10)

(2 - 50 A for SE-CS40)

Unit can be used on a wide variety of trailing cable

applications

Adjustable time delay

(0.1-2.5 s)

Adjustable trip delay for quick protection and system

coordination

Output contacts

Separate annunciation of ground-fault and ground-

check faults

Ground-check

LED indication

Indication of open or short ground-check wire

makes it easier to find faults

CT-loop monitoring

Alarms when CT is not connected

High-induced-ac

rejection

Makes unit suitable for applications with high

voltages and long cables

DFT (Harmonic) filter

Prevents false operation

Zener-characteristic

termination assembly

Provides reliable ground-check loop verification

Fail-safe circuits

Ensures ground-check and ground-fault circuits

remain safe even in the event of equipment failure

Conformal coating

Additional coating protects circuit boards against

harsh environment

XGC option

Increases maximum cable length for ground-check

monitoring (10 km typical)

Features & Benefits

ACCESSORIES

REQUIREMENT

SE-CS10 Series

Required

SE-CS40 Series (for SE-135)

Optional

SE-TA6A Series (for SE-134C)

Required

SE-TA12A/SE-TA12B

Combination (for SE-134C)

Optional

SE-TA12A Series (for SE-135)

Required

SE-IP65CVR-G

Optional

RK-132

Optional

PPI-600V

Optional

TRAILING

CABLE

CT

L2

L1

TERMINATION

DEVICE

A

G

GC

C

B

GROUNDED

SUPPLY

M

SE-134C SERIES

SE-135 SERIES

(Ground-Fault

Ground-Check

Monitor)

B

A