Name: JRV 123 PT fuse failure relay - Sai Creations
Availability: InStock

Features

Solid state reliability

High speed operation

Very high load impedance operation

Principle of Operation:

The relay consists of sensing the voltage across each of the fuses separately. In normal condition, the potential across the fuses is nearly zero. On opening out of the fuse the potential across the particular fuse goes up. This potential drives current through the LED of the opto-coupler. The opto-coupler gets switched on due to the current in the opto-coupler provides circuit path for external LED indication and as well for the electromagnetic relay. The sensing circuit comprising of the opto-coupler and the associated driving circuit is separate for each phase. However, the electromagnetic relay providing potential free contacts for alarm and control is common for all the 3 phases.

Application:

The relay monitors the healthiness of PT fuses.

Description

Ratings

Voltage rating	110V AC, 50Hz. 3 phase
Load impedance	Load impedance between phases should not be more than 20K Ohms
Operating time	Less than 10 milli seconds between the opening of fuse and closing of the open contact of electromagnetic relay
Auxiliary supply	20 to 60V DC 75 to 150V AC / DC 175 to 300V DC / 185 to 250V AC

Settings:

Voltage setting	105 to 170% in steps of 5%
Definite time	0 to 25s in steps of 0.1s.

Over Load Rating:

Voltage input	120% of rated voltage continuously

Burden:

Voltage input	4 VA (maximum) at 110V AC with zero load impedance
Aux. Supply	Less than 3W (Non Operated) Less than 6W (Operated)

Accuracy:

Operating value	± 5%
Operating time	± 5% or ± 20msec
Instantaneous Time	Less than 40msec

Contact Ratings:

Rating	10A at 24V DC / 230V AC

Contact Durability :

Unloaded contact	1,000,000 Operations.
Loaded contact	00,000 Operations

Mechanical Design :

Weight	2500 gms. (approx)
Case Size Fascia	144sq mm, depth 117mm
Installation	Flush mounting
Panel cutout	138×138 mm

Standard Compliance

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

Insulation:

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

Ordering Information

Voltage rating	110V AC, 50Hz. 3Phase
Relay type	JRV 123
Auxiliary supply.	20 to 60V DC 75 to 150V AC / DC 175 to 300V DC / 185 to 250V AC

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JRV 123 PT fuse failure relay

Features

Principle of Operation:

Application:

Description