We are offering Single Pole Sensitive Earth Fault Relay (JRC022).
FEATURES
• Software based design
• Wide setting range
• Wide auxiliary supply
• Low burden
APPLICATION
The relay provides earth fault protection of Generators, Motors, Transformers, Feeder etc., and where definite time protection is required.
PRINCIPLE OF OPERATION
The relay provides earth fault protection for power systems. Relay operating time is determined by set definite time. The relay measures the current from input CT and if it exceeds the set threshold, it extends a trip signal after the operating time, which is determined by set definite time. The relay output contacts are self reset type. TEST button facilitates testing of relay contacts for trip and alarm circuits.
TECHNICAL DATA
| RATINGS | |
| Current rating | 1A/5A |
| Auxiliary Supply | 20 to 60V DC |
| | 75 to 175V AC/DC |
| | 175 to 300V DC |
| | 185 to 250V AC |
| SETTINGS | |
| Earth fault setting | 1 to 16% in steps of 1 % |
| Definite time setting | 0 to 25s in steps of 0.1s |
| OVER LOAD RATINGS | |
| Current input | 2 times Rated continuous |
| | 20 times Rated for 3 s |
| | 40 times Rated for Is |
| BURDEN | |
| Current input | 0.2VA at Rated 5A |
| | 0.05VA at Rated 1A |
| Aux. Supply | Less than 3W (Non Operated) |
| | Less than 5W (Operated) |
| ACCURACY | |
| Operating value | ± 5% |
| Operating Time | ± 5% or ±20ms |
| Instantaneous time | Less than 40ms |
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