Programmable Directional Inverse Time Current Relay JRP 011

Additional Details

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.

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.,

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: 0.1 to 1.0 in steps of 0.01 (separate for O/c & E/F)

Phase Hi-set : 200 to 3200% in steps of 200%

Earth fault Hi-set: 50 to 800% in steps of 50%

Burden:

Current input :

0.2VA per phase (rated 5A)

0.05VA per phase (rated 1A)

Aux. Supply:

Less than 8W (Non operated)

Less than 10W (Operated)

Contacts Durability:

Loaded contact : 10,000 operations min.

Unloaded contact : 100,000 operations min.

Char. Angel setting

O/C setting: Lead 30º / Lead 45º /Lead 60º

E/F setting : Lag 12.5º / Lag 30º / Lag 45º

Ratings:

Aux. Supply :

1) 20 to 60V DC

2) 75 to 175V AC / DC

3) 175 to 300V DC

    185 to 250V AC

Rated Voltage : OVER CURRENT 110V AC / EARTH FAULT 63.5V AC