Features

Software based design

Wide auxiliary supply

Low burden

Principle of Operation:

JRC 932 provides earth fault protection for power systems. Relay operating time is determined by the set definite time. The relay measures the current from the input CT and if it exceeds the set threshold, it extends a trip signal after the operating time, which is determined by set definite time. The relay output contacts are self reset type. TEST button facilitates the testing of relay contacts for the trip and alarm circuits.

Application:

The relay provides over current protection of Generators,Motors, Transformers, Capacitors, Feeder etc.

Description

Ratings

Current rating	1A / 5A
Auxiliary Supply	20 to 60V DC 80 to 260V AC / DC

Settings:

O/C setting	50 to 125% in steps of 5 %
Definite time setting	0.1 to 25s in steps of 0.1s

Over Load Rating:

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

Burden:

Current input	0.2VA at Rated 5A 0.05VA at Rated 1A
Aux. Supply	Less than 3W (Non Operated) Less than 5W (Operated)

Accuracy:

Operating value	±5%
Operating time	± 5% or ±20ms
Instantaneous time	Less than 40ms
Reset time	200 to 250ms

Contact Ratings:

Contact 1 (Trip)	10A at 24V DC / 230V AC
Contacts 2 & 3	5A at 24V DC / 230V AC

Contact Durability:

Unloaded contact	1,000,000 Operations
Loaded contact	100,000 Operations

Standard Compliance:

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

Mechanical Design :

Weight	Approximately 500g
Case Size Fascia	96 mm sq, depth 105mm
Installation	Flush mounting
Panel cutout	92×92 mm

Ordering Information

Relay type	JRC 912
Relay type	1A / 5A
Auxiliary supply	110V / 220V AC
CBCT Dimension	20 to 60V DC 80 to 260V AC / DC

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DEFINITE TIME SINGLE POLE OVER CURRENT RELAY JRC 912

Features

Principle of Operation:

Application:

Description