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I-Gard SIGMA-MD Ground Fault Relay Manuals
Manuals and User Guides for I-Gard SIGMA-MD Ground Fault Relay. We have
1
I-Gard SIGMA-MD Ground Fault Relay manual available for free PDF download: Instruction Manual
I-Gard SIGMA-MD Instruction Manual (28 pages)
GROUND FAULT RELAY
Brand:
I-Gard
| Category:
Relays
| Size: 1.86 MB
Table of Contents
Table of Contents
2
General Information
4
Description
5
Method of Operation
5
Components of the System
5
Neutral Grounding Resistor Monitoring
6
Ground Fault Detection
6
Installation Instructions
7
The SIGMA-MD Monitor Relay
7
Zero Sequence Current Sensor (ZSCS)
8
Ngrs-XX Sensing Resistor
9
Configuration of SIGMA-MD Monitor Relay and NGR
9
Trip Relay and Auxiliary Fault Relay
10
Led Indicators and Diagnostics
11
Start-Up and Reset Indications
11
Power on Led (Green)
12
Ground Fault Led (Red)
12
NGR Fault Led (Red)
12
Zone Ground Led (Red)
13
Self-Test
13
Relay Settings
14
Trip Relay Operating Modes
14
Trip Memory Setting
15
Ground Fault Trip Time Delay
15
Ground Fault Trip Current Level
16
System Frequency
16
NGR Set Let-Through Current
16
SIGMA-MD Monitor Relay Configuration Switches
16
Technical Specifications
20
Catalogue Numbers
23
Appendix A High-Pot and Dielectric Testing
23
Appendix B CAN/CSA M421-00 Use of Electricity in Mines (Excerpts)
24
Applications Examples
24
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