Siemens 7SG164 Ohmega 400 Series Manual page 107

4.1.2 Operating Time Test
Using a test set with a constant source impedance model, and an SIR of ≤30, apply phase faults and earth faults
to the relay inside each of the zones of protection, on the line angle.
Check and record Zone 1, 2, 3 operating times for faults in the middle of reach zones.
Element
=
Zone 1
Phase Fault
=
=
Zone 2
Phase Fault
=
=
Zone 3
Phase Fault
=
Check operating time is ≤ 50ms for SIR ≤30
©2010 Siemens Protection Devices Limited
Time Delay Fault
Settings Type
A-E
Earth Fault
B-E
ms
C-E
A-B
B-C
ms
C-A
A-E
Earth Fault
B-E
ms
C-E
A-B
B-C
ms
C-A
A-E
Earth Fault
B-E
ms
C-E
A-B
B-C
ms
C-A
7SG16 Ohmega 402 60 Commissioning
Applied Measured Operating
Impedance (Ω)
Time (ms)
Checked
OK
Chapter 9 Page 9 of 19