Catalogs > Industrial Controls Catalog > Supplemental Motor Protection > Ground Fault Detection System
Ground Fault Detection System
| Introduction |  |
Standards Compliance and Certifications | |
Product Selection | |
Specifications | |
Typical Wiring Diagrams | |
Approximate Dimensions | |
| Product Overview |
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| Arcing Ground Fault Relay Cat. No. 1409-DOBD |
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| Arcing Ground Fault Sensor Cat. No. 1409-N2 |
Bulletin 1409 — Arcing Ground Fault Detection System
- Adjustable trip from 1…6 A for maximum sensitivity without nuisance tripping
- Output Form C contact (single-pole double-throw) for application flexibility
- Time delay of 50 ms nominal to minimize nuisance tripping and allow time for high current inhibit
- Test circuit is built into test system for proper operation
The Bulletin 1409 Arcing Ground Fault Detection Systems are intended for equipment protection only. These systems are not Ground-Fault Circuit-Interrupters for personnel protection as defined in Article 100 of the U.S. National Electric Code.
Bulletin 1409 is available in two designs, Class I and Class II. The Class I systems are intended for use with shunt-trip circuit breakers or medium voltage controllers. These Class I systems do not contain a high-current inhibit circuit.
The Class II Systems are designed for use with motor starters or contactors to interrupt low-level ground faults. They incorporate a high-current inhibit circuit that guards against the controller opening when the fault current exceeds the controller interrupting capacity. Ground fault currents exceeding the interrupting rating of the controllers are designed to be cleared by the short circuit protection device (fuse or circuit breaker).
Both Class I and Class II Systems consist of two parts — a relay and a sensor. The relay contains all the detection, adjustment and output circuitry. The sensor is a special two-winding current transformer. Operation of the ground fault detection system is indicated by the relay toggle.