3 Phase, Vt Fuse Failure Relay
₹8,098.09
Product Code: JRV 123
Time line :Products will be shipped within 3 weeks from the date of order
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Product Description
Features
- Solid state reliability
- High speed operation
- Very high load impedance operation
APPLICATION
The relay monitors the healthiness of PT fuses.
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.
Ratings
OVER LOAD RATINGS
Burden
Rated voltage :
110V AC,50Hz. 3 phase
Operating time :
Less than 40 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
75 to 150V AC/DC
175 to 300V DC / 185 to 250V AC
Voltage :
120% of rated voltage continuously
Input voltage :
4 VA (maximum) at 110 V AC with zero load impedence
Auxiliary supply :
Less than 3W(Non operated)
Less than 6W(Operated)
Less than 6W(Operated)
Contact Ratings
Insulation
Rating :
10A at 24V DC/230V AC
- 2KV RMS, 50 Hz for 1 minute/ 2.5KV FOR 1 sec. Between all terminals and cases
- 1KV RMS, 50 Hz for 1 minute across open terminals
Weight :
Less than 2500 gms
Case Size :
144 sq mm(W x H) with depth of 117 mm
Installation :
Flush mounting
Panel cutout :
138 X 138 sq mm(W x H)
TERMINAL DIAGRAM
