Dynamic Cold Load Pick-Up Function (50C, 50Nc, 51Nc, 67C, 67Nc); Inrush Restraint - Siemens SIPROTEC 7SJ62 Instruction Manual

10.5

Dynamic Cold Load Pick-up Function (50c, 50Nc, 51Nc, 67c, 67Nc)

Timed Changeover
of Settings
Adjustment Rang-
es/ Resolution
10.6

Inrush Restraint

Adjustment Rang-
es/ Resolution
Function Limits
Crossblock
Crossblock
7SJ62 Manual
C53000-G1140-C121-1
Controlled Elements
Initiation Criteria
Timing
Current Control
Current Control"BkrClosed I MIN"
Time Until Changeover
To Dynamic Settings
Period Dynamic
Settings are Effective
After a Reclosure
Fast Reset Time
Dynamic Settings of Pickup
Currents and Time Delays
or Time Multipliers
1
) For I = 1 A, divide all limits and increments by 5.
N
Controlled Elements
Stabilization Factor
Second Harmonic
Lower Function Limit
Upper Function Limit, Adjustable
I , I , I
a b c
1
) For I = 1 A, divide all limits and increments by 5.
N
Directional and non-directional time over-
current protective elements (separate
phase andground settings)
Current Criteria"BkrClosed I MIN" or
Binary input controlled, for example, by
52/b contact
3 time levels (T
Current threshold "BkrClosed I MIN"
(reset on current falling below threshold:
monitoring with timer)
0.20 A to 5.00 A
T 0 s to 21600 s (= 6 h) (Increments 1 s)
CB Open
T 4 s to 21600 s (= 6 h) (Increments 1 s)
Active
T 1 s to 600 s (= 10 min) (Increments 1 s)
Stop
or ∞ (fast reset inactive)
Adjustable within the same ranges
and with the same increments
the directional and non-directional time
overcurrent protection
All 50, 50N, 51, 51N, 67, and 67N Elements
I /I 10 % to 45 %
2f
at least one phase current ≥ 1.25 A
1.50 A to 125.00 A
ON/OFF
Technical Data
, T , T )
CB Open Active Stop
1 1
) (Increments 0.05 A)
1
)
1
) as
(Increments 1 %)
1
)
1
)(Increments 0.05 A)
10-19
)
1
)