Trailing Cable Protection Relays
SE-134C Series
- Protects portable equipment from hazardous voltages
- Proven in monitoring trailing cables on large mobile equipment
- High-induced-ac rejection for applications with high voltages and long cables
Description
The Littelfuse SE-134C is a microprocessor-based, combination earth-wire monitor and earth-fault relay for resistance-earthed or solidly earthed systems. It continuously monitors the integrity of the earth conductor to protect portable equipment from hazardous voltages caused by earth faults.
The SE-134C 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.
We are the exclusive NSW supplier of Littelfuse protection relays and controls for the protection, safe control and distribution of electrical power in industrial applications.
Adjustable pickup (0.5 - 12.5 A)
Unit can be used on a wide variety of trailing cable applications.
Adjustable time delay (1 - 2.5 s)
Adjustable trip delay for quick protection and system coordination.
Output contacts
Separate annunciation of earth-fault and earth-check faults.
Earth-check LED indication
Indication of open or short earth-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 earth-check loop verification.
Fail-safe circuits
Ensures earth-check and earth-fault circuits remain safe even in the event of equipment failure.
Conformal coating
Additional coating protects circuit boards against harsh environments.
Data Sheets and Manuals
SE-134C Data SheetSE-134C ManualLittelfuse Protection Relays Earth-Fault Paper TNEarth-Fault Protection and Earth-Conductor Monitoring for Portable Mine-Power Cables
CAD Drawings and Models
SE-ta6a CAD DrawingSE-134r13 CAD Drawing
IEEE Device Numbers
Checking or Interlocking Relay (3GC), Earth fault (50G/N, 51G/N)
Input Voltage
65-265 Vac; 85-275 Vdc; 18-72 Vdc
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
C-Tick, CE
Conformally Coated
Standard feature
Warranty
5 years
Mounting
Panel, Surface
GC Trip Resistance
28Ω (Standard), 45Ω (XGC Option)
