Dynamic Cold Load Pickup - Siemens 7SC80 Manual

Technical Data

4.6 Dynamic Cold Load Pickup

4.6 Dynamic Cold Load Pickup
Time-controlled cold load pickup
Controlled elements
Initiation criteria
Timing
Current Control
Setting Ranges / Increments
Current Control
Time Until Changeover To Dynamic Settings T
Period Dynamic Settings are Effective After a Reclo-
sure T
Active
Fast Reset Time T
Dynamic Settings of Pickup Currents and Time
Delays or Time Multipliers
530
directional and non-directional overcurrent protection, separated by
phases and ground (setting values including characteristic selection for
the inverse time elements)
Current criterion BkrClosed I MIN
Interrogation on the circuit breaker position
Automatic reclosing function ready
Binary input
3 time elements
(T , T
CB open
Current threshold "BkrClosed I MIN"
(reset on current falling below threshold: monitoring with timer)
for Ι
N
for Ι
N
Stop
, T
Active Stop)
= 1 A 0.04 A to 1.00 A
= 5 A 0.20 A to 5.00 A
0 s to 21600 s (= 6 h)
CB Open
1 s to 21600 s (= 6 h)
1 s to 600 s (= 10 min) or ∞ (fast
reset inactive)
Adjustable within the same ranges and with the same
increments as the directional and non-directional time
overcurrent protection
Increments
0.01 A
Increments 1 s
Increments 1 s
Increments 1 s
SIPROTEC Compact, 7SC80, Manual
E50417-G1140-C486-A8, Edition 07.2017