7PG21 Solkor Rf Performance Specification
Thermal Withstand (AC current) Multiple of rated current
Continuous 2x
20 minutes 2.8x
10 minutes 3.5x
5 minutes 4.7x
3 minutes 6.0x
2 minutes 7.3x
3 seconds 60x
1 second 100x limited to 400A
Operating Time R Mode 5kV Rf Mode 15kV Rf Mode
3x fault setting 60ms
5x fault setting 45ms 40ms
10x fault setting 45ms
Indication Hand Reset Flag
Contact Arrangement 3 N/O
Contact Rating Make and carry for 0.2s a burden of 6600VA with a maximum of 30A
R Mode Rf Mode
Maximum output of CT required
to operate relay
1.2VA 3VA
4.2 Pilot Supervision Equipment
Auxiliary Supply
Send End 110/220/240V ac 50/60Hz
Receive End 30V dc
50V dc
125V dc
240V dc
Burdens
AC Supervision Supply 10VA approx.
AC supply fail relay 3 to 5VA
Receive Repeat Relay 1W
Contact Arrangements
Pilot Supervision
Relay(B75)
1NO self reset
Repeat relay B74 2NO & 2NC
Supervision supply fail relay 2NO & 2NC
Contact Ratings
Type B22, B74 and B75
Make & Carry
Continuously
1500VA ac or 1500W dc within limits of 660V and 3A.
Make and carry 8A for 3 secs or 16A for 1 second.
Break 300VA ac or 75W dc (inductive L/R -0.04) within limits of 250V and 5A
Indication Flag indicators shown on de-energisation
©2010 Siemens Protection Devices Limited Chapter 2 Page 4 of 5
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