DEFINITE TIME EARTH LEAKAGE RELAY JRC 974

OVERVIEW

    Features

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

Application:

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

DEFINITE TIME EARTH LEAKAGE RELAY JRC 974

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.

 

SPECIFICATIONS

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

     
 

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

     
 

DEFINITE TIME EARTH LEAKAGE RELAY JRC 974

DOWNLOADS

DEFINITE TIME EARTH LEAKAGE RELAY JRC 974

Catalogues:

DOWNLOAD

Operating Manual:

DOWNLOAD

 

DEFINITE TIME EARTH LEAKAGE RELAY JRC 974

 

ORDERING INFO.

Ordering Information:

Current rating

 

:

 

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

 

DEFINITE TIME EARTH LEAKAGE RELAY JRC 974

 

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