7SR210 & 7SR220 Commissioning & Maintenance Guide
Page 40 of 82
© 2013 Siemens Protection Devices Limited
Apply 2x setting current if possible and record operating time
Phase
Is
(Amps)
DTL
(sec)
P.U. Current
Amps
Tolerance
Operate Time
2 x Is
Tolerance
REF
It is also desirable to check the operating voltage achieved with the setting resistor and all parallel CTs connected
but de-energised. A higher capacity test set will be required for this test. Adequate current must be supplied to
provide the magnetising current of all connected CTs. Precautions should be taken to ensure that no personnel
are at risk of contact with any of the energised secondary wiring during the test.
Settings Data Voltage Setting
Measured
To complete testing of the REF requires primary injection through the phase and residual (REF) CT in series to
simulate an out of zone fault and ensure stability of the relay. The test can then be repeated with the REF CT
secondary connections reversed to prove operation.
1.1.1.1
Element Blocking
The Restricted Earth Fault element can be blocked by Binary Input Inhibit. This functionality should be checked.
Element
BI Inhibits
64H
Check correct indication, trip output, alarm contacts, waveform record.
Check that any shorting links are removed after testing.
Summary of Contents for Argus 7SR21
Page 1: ...Energy Management 7SR21 7SR22 Argus Overcurrent Relay Reyrolle Protection Devices ...
Page 2: ......
Page 4: ...Contents 7SR11 and 7SR12 Page 2 of 2 2018 Siemens Protection Devices Limited ...
Page 185: ...7SR210 Settings Guide Unrestricted 2018 Siemens Protection Devices Limited Page 61 of 61 ...
Page 277: ...7SR220 Settings Guide Unrestricted Page 72 of 107 2013 Siemens Protection Devices Limited ...
Page 382: ...7SR220 Technical Manual Chapter 4 Page 2 of 96 2017 Siemens Protection Devices Limited ...
Page 386: ...7SR220 Technical Manual Chapter 4 Page 6 of 96 2017 Siemens Protection Devices Limited ...
Page 398: ...7SR220 Technical Manual Chapter 4 Page 18 of 96 2017 Siemens Protection Devices Limited ...
Page 414: ...7SR220 Technical Manual Chapter 4 Page 34 of 96 2017 Siemens Protection Devices Limited ...
Page 466: ...7SR220 Technical Manual Chapter 4 Page 86 of 96 2017 Siemens Protection Devices Limited ...
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Page 643: ...Unrestricted ...