Sai Creations

DEFINITE TIME EARTH LEAKAGE RELAY JRC 974

 0.00

Features

  • Bar graph indication of leakage current
  • Remote reset and test facility
  • Wide range of settings
  • Low burden

Principle of Operation:

JRC 974 provides earth leakage protection for power systems. The relay operating time is determined by a programmable definite time delay. The relay measures the earth leakage current from the CBCT and if it exceeds the set threshold, it extends a trip signal after the operating time. The relay output contacts are self reset type. TEST button facilitates verification of relay contacts.

Application:

The relay provides time graded earth leakage protection for generators, transformers, capacitors, feeder etc

20 in stock

Description

Ratings

Current rating ( In ) 0.03 to 0.1A /0.3 to 1.0
0.03 to 0.1A / 0.15 to 0.50A
0.3 to 1.0A/ 1.5 to 5.0A
110V/220V AC

Settings:

Operating characteristics 0.03 to 0.1A in steps of 0.01A
0.3 to 1.0A in steps of 0.1A
0.03 to 0.1A in steps of 0.01A
0.15 to 0.5 in steps of 0.05A
0.3 to 1.0A in steps of 0.1A
1.5 to 5.0A in steps of 0.5A

Over Load Rating:

Current input 10 times the rated continuosly

Burden:

Auxiliary circuit £ 3W ( Non-operated) £ 6W ( operated)
Current input circuit £ 2VA at rated current

Accuracy:

Operating value ±5%
Operating time ± 5% or + 30ms (which ever is higher)

Contact Ratings:

Output contacts – 1&2 10A at 24V DC / 230V AC

Contact Rating

For JRC 951P, JRC 952, Trip – 10A at 24V DC/ 230V AC
JRC 962P, JRC 964 relays Alarm – 5A at 24V DC/ 230V AC
For JRC 953 & JRC 966 relays 5A at 24V DC/230V AC

Mechanical Design :

Weight Approximately 500g
Case Size Fascia 96mm x 96mm x 105mm
Installation Flush mounting
Panel cutout 92mm x 92mm

Standard Compliance:

Accuracy test IEC 60255-3
Insulation test IEC 60255-5

Ordering Information

Relay type 0.03 to 1.0A
0.03 to 0.5A
0.3 to 5.0A
Relay type JRC 974
Auxiliary supply 110V / 220V AC
CBCT Dimension 35, 70 or 100mm Dia

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