Sai Creations

NUMERICAL LOCAL BREAKER BACKUP RELAY JNC 154

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Features

  • Wide over current setting
  • Fast reset time
  • History of 5 latest faults

Principle of Operation:

The relay is designed to trip the feeder end CB if the protective relay at the distribution end operates but its corresponding CB fails to operate. The current is derived from line CT. The instantaneous trip output contact operate when the over current exist and protective relay operated. The protective relay contact (PRC) input is required. The delayed output contact operates after selected definite time.

Application:

JNC 154 is a numerical local breaker backup relay. The relay is used to check the operation of feeder breaker and to trip all the breaker feeding fault in the event of feeder breaker fail to trip.

20 in stock

Description

Ratings

Primary current rating 1A / 5A ( Site selectable)
Aux. Supply 1) 20 to 60V DC
2) 80 to 260V AC / DC
Aux. Supply 20 – 60V DC
75 – 150V AC /DC
175 – 300V DC or
185 – 250V AC

Settings:

Over current 5 to 200% in steps of 5%
Definite time 50ms to 1.25s in steps of 10ms.

Over Load Rating:

Current input 2 times rated continuous
20 times rated for 3s
40 times rated for 1s

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)

Operating Time

Instantaneous operating time Less than 10 ms.
Reset time Less than 30 ms.

Accuracy:

Current protection ± 5%
Operating Time ± 5%

Contact Ratings:

Make & carry 1250VA with max. current 5A or
max. Voltage 660V AC
1000W with max. current 5A or
max. Voltage 250V DC
Break 2500 VA with max current 10A or
max. Voltage 660V AC
200 W (resistive) 100 W (inductive) with max.
current 10A or max. Voltage 250V DC

Contact Durability :

Loaded contact 10,000 operations minimum
Unloaded contact 100,000 operations minimum

Insulation

  1. 2KV RMS, 50 Hz for 1 minute / 2.5 KV for 1 sec . Between all terminals and cases as per IEC 602555.
  2. 1KV RMS, 50 Hz for 1 minute across open contacts as per IEC 602555

Mechanical Design :

Weight Approx. 5 Kgs.
Case Size Fascia 152 x 296 mm, Depth 250 mm
Installation Flush mounting
Panel cutout 146 x 264 mm

Burden:

Current input 0.4VA per phase (Rated 5A)
0.05VA per Phase (Rated 1A)
Aux. Supply Less than 8W (Non operated)
Less than 12W (Operated)

Ordering Information

Current rating 1A / 5A
Auxiliary supply 1) 30V DC or
2) 110V AC/DC or
3) 220V AC/DC

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