Programmable directional inverse time current relay - JRP XXX

Features

  • Software based design
  • Programmable time current characteristics
  • Choice of four curves
  • Selectable characteristic angle
  • Programmable directional / Non-directional element
  • Draw - out case

Application:

The relay provides time graded phase and earth fault protection of Parallel transformers, Transformer feeders, Parallel feeders, ring main system etc.,

Principle of Operation:

The relay measures the line current from each of the phases and if it exceeds the set threshold, then relay extends a trip signal after an operating time. The relay's operating time is determined by selecting one of the four inverse time characteristics. The relay has facility to active / inhibit the high set protection feature. The relay output contacts are self reset . Relay operation without any fault current is determined by trip test facility.



ACCURACY:

Operating value : 105% to 120% of setting
Drop-off / pick-up : Between 80% to 95%
Operating Time : ±5% or ±30ms whichever is higher
High set operating value : ±5% or ±30ms whichever is higher
Phase angle : ±9º of the operating angle
High set operating time : Less than 30ms @ 2 times current setting
Reset Time : 160ms to 180ms

RATINGS:

Current rating ( In ) : 1A / 5A
Auxiliary Supply : 1) 20 to 60V DC
  : 2) 75 to 150V DC / AC
  : 3) 175 to 300V DC / 185 to 250V A

CONTACT RATINGS:

Relay rating : 10A at 24V DC/230V AC

CONTACT DURABILITY :

Loaded contact     : 10,000 operations min.
Unloaded contact : 100,000 operations min.

MECHANICAL DESIGN :

Weight : 2500 gms. (approx)
Case Size : 144sq mm, depth 232mm
Installation : Flush mounting
Panel cutout : 138mm x 138mm

INSULATION:

1. 2KV RMS, 50 Hz for 1 minute / 2.5 KV for 1 sec . Between all terminals and earth.
2. 1KV RMS, 50 Hz for 1 minute across open contacts as per IEC 60255-5

STANDARD COMPLIANCE:

Accuracy Test : IEC 60255-3
Insulation Test : IEC 60255-5

SETTINGS:

Operating characteristics : 1) 3.0s Normal Inverse
  :  2) 1.3s Normal Inverse
  : 3) 1.5s Very Inverse
  : 4) 0.8s Extremely Inverse
Phase O/c (IDMT) : 50 to 200% in steps of 10%
Earth fault (IDMT) : 5 to 80% in steps of 5%
TMS (separate for O/c & E/F) : 0.1 to 1.0 in steps of 0.01
Phase Hi-set : 200 to 3200% in steps of 200%
Earth fault Hi-set : 50 to 800% in steps of 50%

Char. Angel setting :

O/C setting : Lead 30º
  : Lead 45º
  : Lead 60º
E/F setting : Lag 12.5º
  : Lag 30º
  : Lag 45º

OVER LOAD RATING:

   
Current input : 2 times rated continuous
  : 20 times rated for 3 sec

BURDEN :

Current input : 0.2VA per phase (rated 5A)
  : 0.05VA per phase (rated1A)
Aux. Supply : Less than 8W (Non operated)
  : Less than 10W (Operated)

ORDERING INFORMATION :

Relay rating type : JRP 011(O/c relay)
  : JRP 012 (O/c with hiset relay)
  : JRP 021 (E/F relay)
  : JRP 022 (E/F with hiset relay)
Current rating : 1A / 5A
Aux supply : 20 to 60V DC
  : 75 to 150V DC / AC
  : 175 to 300V DC / 185 to 250V AC