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Over Current Relay - 9XX
Features
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Software based design
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DIP switch settings
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Choice of four curves
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Instantaneous high set
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Very low burden
Application:
Time graded protection of generators, Transformers, capacitors etc;
ACCURACY:
| Operating value |
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105 to 120% of set current |
| Resetting value |
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80 to 97% of the pickup value |
| High set operating value |
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±5% |
| Inverse operating time |
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±5% or ± 30ms (which ever is higher) |
| High set operating time |
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< 40ms @ 2 times the set current |
| Reset time |
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200 to 250ms |
| Over shoot time |
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Less than 100ms |
RATINGS:
| Current rating (In) |
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1A or 5A |
| Auxiliary Supply |
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20 to 60V DC or |
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80 to 260V AC/DC |
CONTACT RATINGS:
| For JRC 951P,JRC 952,JRC 962P, JRC 964 relays |
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Trip – 10A at 24V DC/ 230V AC
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Alarm – 5A at 24V DC/ 230V AC
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| For JRC 953 & JRC 966 relays |
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5A at 24V DC/230V AC |
OUTPUT CONTACTS:
| For JRC 951P,JRC 952, JRC 962P,JRC 964 relays |
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Trip – 1N/O
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Alarm –2N/O
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| For JRC 953 & JRC 966 relays |
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2N/O contacts |
MECHANICAL DESIGN :
| Weight |
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550gms approx. |
| Case Size |
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96sqmm, Depth 105mm |
| Installation |
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Flush mounting |
| Panel cutout |
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92mm x 92mm |
STANDARD COMPLIANCE :
| Accuracy test |
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IEC 60255-3 |
| Insulation test |
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IEC 60255-5 |
| 1MHz HFD test |
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IEC 60255-22-1 |
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CURRENT SETTING (INVERSE TIME):
| Over current (I>) |
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50 to 200% in steps of 10% |
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| Instantaneous high set |
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2 to 16 times 1> set value |
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OPERATING CHARACTERISTICS:
| Inverse time Characteristics |
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3s Normal inverse |
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1.3s Normal inverse |
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1.5s Very inverse |
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0.8/0.6s Extremely inverse |
| Time multiplier setting (TMS) |
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0.01 to 1.6 in two ranges |
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1st range : 0.01to 0.32 in steps of 0.01 |
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2nd range : 0.05 to 1.6 in steps of 0.05 |
OVER LOAD RATING: |
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| Current input |
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2 times the rated continuously |
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20 times the rated for 3s |
BURDEN :
| Auxiliary circuit |
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3W (Non-operated) |
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6W ( Operated) |
| Current input circuit |
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1A – 0.05 VA (max) at rated current |
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5A – 0.2 VA (max) at rated current |
ORDERING INFORMATION :
| Current rating |
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1A or 5A |
| Curve selection |
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0.8 or 0.6s Extremely inverse |
| Relay type |
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JRC 966 - 3 Pole IDMT With High set |
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JRC 953 - 3 Pole IDMT Without High set |
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JRC 964 - 2 Pole IDMT With High set |
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JRC 952 - 2 Pole IDMT Without High set |
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JRC 962P - 1 Pole IDMT With High set |
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JRC 951P - 1 Pole IDMT Without High set |
| Auxiliary Supply |
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20 to 60V DC or 80 to 260V AC/DC |
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