Three pole, Differential Protection Relay (JRD 013)
₹18,991.83
Product Code: JRD 013
Time line :Products will be shipped within 3 weeks from the date of order
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Product Description
Features
- Software based design
- Very sensiytive and wide setting range
- Insensitive to currents at harmonic frequencies
- Trip test facility
APPLICATION
Restricted earth fault protection of transformers, generators
and motors differential protection of bus bars, motors
and generators.
PRINCIPLE OF OPERATION
The Relay JRD 013 are current operated Microprocessor based, Three pole, Differential
Protection Relay which work on the high impedance principle. An external series stabilizing
resistor is used with this relay to make it a voltage operated relay. The voltage setting of the relay
is adjusted to be higher than that developed by the current transformers used for maximum
external fault condiytions.
The sensing current is converted to voltage by an internal resistor and this voltage is fed to a
harmonic network which is tuned to fundamental frequency. The output of filter is fed to voltage
comparator. When the sensing current signal at the fundamental frequency exceeds the set
value,the comparator gates a train of pulses to the processor. The program residing in the CPU
performs the funcytion of control and also gives output signals for relay and LED driver circuits.
The operaytion of the relay is indicated by the glowing of a 'Red' LED, which has to be reset manually
by means of a 'RESET' push button provided on the front of the relay. A 'Trip Test' push button
is also provided in the relay to enable tesyting of the trip and alarm circuits. When this push
button is pressed, the output element of the relay is energized and its contacts close to energize
the trip and alarm circuits.
The relay will not oper ated at third harmonic currents upto 25 times the setting.
TECHNICAL DATA RATING
SETTINGS
IMPEDENCE
EXTERNAL STABILIZING RESISTORS
OVER LOAD RATING
Burden
Accuracy
Voltage rating:
1A/5A
Definite time setting :
20 to 60V DC
75 to 150V DC
175 to 300V DC/185-250V AC
75 to 150V DC
175 to 300V DC/185-250V AC
Operating value :
2.5 to 80% in steps of 2.5%
1A rated :
200 milli Ohms
5A rated :
20 milli Ohms
1A rated :
0 – 600 Ohms 100W adjustable
5A rated :
0 – 100 Ohms 100W adjustable
Current input :
2 times rated continuously
20 times rated for 3s
20 times rated for 3s
Input voltage :
Less than 0.2VA at Rated 1A
Less than 0.5VA at rated 5A
Less than 0.5VA at rated 5A
Auxiliary supply :
Less than 3W(Non operated)
Less than 5W(Operated)
Less than 5W(Operated)
Operating value :
+/- 5%
Operating time :
+/- 5% or +/- 30ms
Contact Ratings
Contact Durability
Insulation
Mechanical Design
Rating :
10A at 24V DC/230V AC
Loaded contact :
10,000 operations
Unloaded contact :
20,000 operations
- 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
Accuracy test :
IEC 60255-151
Insulation test :
IEC 60255-27
Weight :
Less than 1500 gms
Case size :
144 sq mm with depth of 117 mm
Installation :
Flush mounting
Panel cutout :
138 X 138 mm
Ordering Information
Relay Type :
JRD 013
Rated Current :
1A/ 5A
Auxiliary supply :
20 to 60V DC
75 to 159V DC
175 to 300V DC/185-250V AC
75 to 159V DC
175 to 300V DC/185-250V AC