Timer input
OC_STR
OC_OPR
Operate timer
A
Load shed blocking signal
(From Block logic module)
INHIBIT_TRG
SLS_DISABLE
OR
A
Where,
Slow load shed mode
“Disable”
Operate delay time
GUID-E69F65A3-5F47-4CD0-8D85-7AC58244EC44 V1 EN
Figure 170:
Operating effect of the slow load shed disable signal
Activation of
INHIBIT_TRG
or
SLS_DISABLE
or load-shed
blocking conditions of power source PSCSWI function does not reset
the timer
9.2
Current-based inverse definite minimum time (IDMT)
characteristics
9.2.1
IDMT curves for overcurrent protection
The inverse-time modes, the operation time depends on the momentary value of the
current: the higher the current, the faster the operation time. The operation time
calculation or integration starts immediately when the current exceeds the set
Start
value
and the
OC_STR
output is activated.
Section 9
1MRS757256 F
General function block features
324
PML630/Compact Load-Shedding Solution
Technical Manual
Summary of Contents for Relion 630 Series
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