The current criterion takes the currents of such side or measuring location to which the corresponding protec-
tive function is assigned. When using the breaker position criterion, the feedback information of the assigned
breaker must inform the device about the breaker position.
The time overcurrent protection for earth current allows the breaker criterion only if an unequivocal relation-
ship exists between its assigned side or measuring location and the feedback information of the breaker
(SwitchgCBaux S1, SwitchgCBaux S2 to SwitchgCBaux M5, addresses 831 to 840).
Timers
There are no specific procedures on how to set the delay times CB Open Time at addresses 1711), Active
Time (address 1712) and Stop Time (address 1713. These time delays must be based on the specific loading
characteristics of the equipment being protected, and should be set to allow short-term overloads associated
with dynamic cold load conditions.
Cold Load Pickup Values
The dynamic pickup values and time delays associated with the time overcurrent stages are set in the related
addresses of the stages themselves.
Settings
Addr. Parameter Setting Options Default Setting Comments
1701 COLDLOAD PICKUP OFF
ON
OFF Cold-Load-Pickup Function
1702 Start CLP Phase No Current
Breaker Contact
No Current Start Condition CLP for O/C Phase
1703 Start CLP 3I0 No Current
Breaker Contact
No Current Start Condition CLP for O/C 3I0
1704 Start CLP Earth No Current
Breaker Contact
No Current Start Condition CLP for O/C Earth
1705 Start CLP Ph 2 No Current
Breaker Contact
No Current Start Condition CLP for O/C Phase
2
1706 Start CLP Ph 3 No Current
Breaker Contact
No Current Start Condition CLP for O/C Phase
3
1707 Start CLP 3I0 2 No Current
Breaker Contact
No Current Start Condition CLP for O/C 3I0 2
1708 Start CLP 3I0 3 No Current
Breaker Contact
No Current Start Condition CLP for O/C 3I0 3
1709 Start CLP E 2 No Current
Breaker Contact
No Current Start Condition CLP for O/C Earth 2
1711 CB Open Time 0 .. 21600 sec 3600 sec Circuit Breaker OPEN Time
1712 Active Time 1 .. 21600 sec 3600 sec Active Time
1713 Stop Time 1 .. 600 sec; ∞ 600 sec Stop Time
Information List
No.
Information Type of
Informa-
tion
Comments
025.2413 I Dyn.set. ACT OUT Dynamic settings O/C Phase are ACTIVE
026.2413 IE Dyn.set. ACT OUT Dynamic settings O/C Earth are ACTIVE
049.2404 >BLOCK CLP SP >BLOCK Cold-Load-Pickup
2.6.3
2.6.4
Functions
2.6 Dynamic Cold Load Pickup for Time Overcurrent Protection
SIPROTEC 4, 7UT6x, Manual 175
C53000-G1176-C230-5, Edition 09.2016
To Next Page
Loading...
Need help?
General
