5
Protection. Frequency tests
The requirement is specified in section 5.3.1, test procedure
in Annex A or B 1.3.3
Function
Setting
Trip test
“No trip tests”
Frequency
Time
delay
Frequency
Time
delay
Frequency /time
Confirm
no trip
U/F stage 1 47.5Hz
20s
47.5Hz
20.22
47.7Hz/ 25s
No trip
U/F stage 2 47Hz
0.5s
47.0Hz
0.543
47.2Hz/ 19.98s
No trip
46.8Hz/ 0.48s
No trip
O/F stage 1 51.5Hz
90s
51.5Hz
90.2
51.3Hz/95s
No trip
O/F stage 2 52Hz
0.5s
52.0Hz
0.528
51.8Hz/ 89.98s
No trip
52.2Hz/ 0.48s
No trip
Protection. Voltage tests
The requirement is specified in section 5.3.1, test procedure in
Annex A or B 1.3.2
Function
Setting
Trip test
“No trip tests”
Voltage
Time
delay
Voltage
Time
delay
Voltage /time
Confirm
no trip
U/V stage 1 200.1V
2.5s
198.1V
2.54
204.1V/3.5s
No trip
U/V stage 2 184V
0.5s
182V
0.526
188V/2.48s
No trip
180V/0.48s
No trip
O/V stage 1 262.2V
1.0s
264.2V
1.027
258.2V/2.0s
No trip
O/V stage 2 273.7V
0.5s
275.7V
0.528
269.7V/0.98s
No trip
277.7V/0.48s
No trip
Note for Voltage tests the Voltage required to trip is the setting ±3.45V. The time delay can
be measured at a larger deviation than the minimum required to operate the protection. The
No trip tests need to be carried out at the setting ±4V and for the relevant times as shown in
the table above to ensure that the protection will not trip in error.
