PT FUSE FAILURE RELAY JRV 123

OVERVIEW

    Features

  • Solid state reliability
  • High speed operation
  • Very high load impedance operation

Application:

The relay monitors the healthiness of PT fuses.

PT FUSE FAILURE RELAY JRV 123

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.

 

SPECIFICATIONS

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 Ratings

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

     

Mechanical Design :

Weight

:

2500 gms. (approx)

Case Size Fascia
Installation

:
:

144sq mm, depth 117mm
Flush mounting

Panel cutout

:

138x138 mm

     

Standard Compliance

Accuracy test

:

IEC 60255-3

Insulation test

:

IEC 60255-5

     

Contact Durability :

Unloaded contact

:

1,000,000 Operations.

Loaded contact

:

100,000 Operations

     

Insulation:

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

PT FUSE FAILURE RELAY JRV 123

 

DOWNLOADS

PT FUSE FAILURE RELAY JRV 123

Catalogues:

DOWNLOAD

Operating Manual:

DOWNLOAD

 

PT FUSE FAILURE RELAY JRV 123

 

ORDERING INFO.

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

 

 

 

 

PT FUSE FAILURE RELAY JRV 123

 

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