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Single pole over current relay - JRC 912
Features
- Software based design
- Wide auxiliary supply
- Low burden
Application:
The relay provides over current protection of Generators, Motors, Transformers, Capacitors, Feeder etc.
Principle of Operation:
JRC 912 provides single pole over current protection forpower 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.
ACCURACY:
| Operating value |
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± 5% |
| Operating time |
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± 5% or ±20ms |
| Instantaneous time |
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Less than 40ms |
| Reset time |
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200 to 250ms |
RATINGS:
| Current rating |
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1A / 5A |
| Auxiliary Supply |
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20 to 60V DC |
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80 to 260V AC / DC |
CONTACT RATINGS:
| Contact 1 (Trip) |
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10A at 24V DC / 230V AC |
| Contacts 2&3 |
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5A at 24V DC / 230V AC |
CONTACT DURABILITY :
| Unloaded contact |
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1,000,000 Operations |
| Loaded contact |
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100,000 Operations |
MECHANICAL DESIGN :
| Weight |
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App. 550g |
| Case size |
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96 mm sq, depth 105mm |
| Installation |
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Flush mounting |
| Panel cutout |
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92x92 mm |
STANDARD COMPLIANCE
| Accuracy test |
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IEC 60255-3 |
| Insulation test |
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IEC 60255-5 |
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SETTINGS:
| O/C setting |
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50 to 125% in steps of 5 % |
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| Definite time setting |
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0.1 to 25s in steps of 0.1s |
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OVER LOAD RATING: |
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| Current input |
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2 times Rated continuous |
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20 times Rated for 3s |
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40 times Rated for 1s |
BURDEN :
| Current input |
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0.2VA at Rated 5A |
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0.05VA at Rated 1A |
| Aux. Supply |
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Less than 3W (Non Operated) |
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Less than 5W (Operated) |
ORDERING INFORMATION :
| Relay type |
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JRC 912 |
| Current rating |
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1A / 5A |
| Auxiliary Supply |
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20 to 60V DC |
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80 to 260V AC / DC |
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