Siemens Solkor 7PG2113 Technical Manual page 211

Measured fault setting
(amps)
Typ Primary Secondary
e of current current
fault
At At At
end end end
1 2 1
A-E
B-E
C-E
A-B
A-C
C-A
3 P
If it is convenient to permit operation of the circuit breaker at this stage, repeat one of the tests with the trip links
inserted. Increase the primary current to the setting of the protection; the circuit breaker should then operate thus
proving the tripping circuit.
Repeat the tests at the other end of the feeder.
When all the tests have been completed at both ends of the feeder, compare results between ends. Check that
the most sensitive earth fault setting at each end refers to the same phase, i.e. the red phase, the next sensitive
the Yellow phase and the least sensitive the Blue phase.
It should be noted that primary fault settings vary slightly with the current transformers used and the capacitance
of the pilots. With average current transformers the fault settings at zero pilot capacitance are as given in Table 3.
Values are expressed as percentages of relay rating.
Fault settings will be practically unchanged for pilot capacitance values between zero and approximately 80% of
the maximum capacitance values specified in Table
effect of increasing the fault settings.
A
B
C
Figure 1.4-1 -Connections for Overall Fault setting Tests by Primary Injection
©2012 Siemens Protection Devices Limited
Relay
operating
current
Type
m/amps D.C.
fault
At At At
end end end
2 1 2
A-E
B-E
C-E
A-B
A-C
C-A
3 P
Table 1.4-1
1.3-2.
E
7PG2113/4/5/6 Commissioning & Maintenance
Solkor Rf without isolating
transformers
of
R mode Rf mode
N1 N N1
tap tap tap
16 22 18
18 27.5 21
22 37 25
110 125
110 125
55 62
63 72
Test of fault settings
Values of pilot capacitance higher than this have the
Fault settings
Solkor Rf with isolating
transformers
R mode Rf mode
N N1 N N1
tap tap tap tap
25 22 31 25
32 22 31 30
42 31 52 35
155
155
77.5
89
E
Chapter 6 Page 13 of 77
N
tap
35
44
59
177
177
88.5
101