Settings For Frequency Protection - Siemens SIPROTEC 7SJ62 Instruction Manual

Functions
Delays
Minimum Voltage

6.12.2.1 Settings for Frequency Protection

For 60 Hz systems:
Addr. LCD-Text
5401 FCT 81 O/U
5402 Vmin
5404 81–1 PICKUP
5405 81–1 DELAY
5407 81–2 PICKUP
5408 81–2 DELAY
5410 81–3 PICKUP
5411 81–3 DELAY
5413 81–4 PICKUP
5414 81–4 DELAY
For 50 Hz systems:
Addr. LCD-Text
5401 FCT 81 O/U
5402 Vmin
5403 81–1 PICKUP
5405 81–1 DELAY
5406 81–2 PICKUP
5408 81–2 DELAY
5409 81–3 PICKUP
5411 81–3 DELAY
5412 81–4 PICKUP
5414 81–4 DELAY
6-122
The time delays (Definite Time) entered at addresses  , , and ,
allow the device to prioritize or order corrective actions based on the degree to which
the actual system frequency departs (upward or downward) from the nominal system
frequency.
The minimum voltage is set at address  9PLQ. If the positive sequence voltage
is less than this value, the frequency protection is blocked.
Setting Options
OFF
ON
~
40 120 V
~
55.50 64.50 Hz
~
0.00 100.00 sec.
~
55.50 64.50 Hz
~
0.00 100.00 sec.
~
55.50 64.50 Hz
~
0.00 100.00 sec.
~
55.50 64.50 Hz
~
0.00 100.00 sec.
Setting Options
OFF
ON
~
40 120 V
~
45.50 54.50 Hz
~
0.00 100.00 sec.
~
45.50 54.50 Hz
~
0.00 100.00 sec.
~
45.50 54.50 Hz
~
0.00 100.00 sec.
~
45.50 54.50 Hz
~
0.00 100.00 sec.
Default Setting
OFF 81 Over/Under
Frequency Protection
65 V Minimum required
voltage for operation
59.50 Hz 81-1 Pickup
60.00 sec. 81-1 Time Delay
59.00 Hz 81-2 Pickup
30.00 sec. 81-2 Time Delay
57.50 Hz 81-3 Pickup
3.00 sec. 81-3 Time delay
61.00 Hz 81-4 Pickup
30.00 sec. 81-4 Time delay
Default Setting
OFF 81 Over/Under
Frequency Protection
65 V Minimum required
voltage for operation
49.50 Hz 81-1 Pickup
60.00 sec. 81-1 Time Delay
49.00 Hz 81-2 Pickup
30.00 sec. 81-2 Time Delay
47.50 Hz 81-3 Pickup
3.00 sec. 81-3 Time delay
51.00 Hz 81-4 Pickup
30.00 sec. 81-4 Time delay
Comments
Comments
7SJ62 Manual
C53000-G1140-C121-1