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7SR10 Description of Operation
©2018 Siemens Protection Devices Limited Chapter 1 Page 28 of 77
Operation of the time delayed overcurrent elements can be inhibited from:
Inhibit 51-n
A binary or virtual input.
79 P/F Inst Trips:
51-n
When ‘delayed’ trips only are allowed in the auto-reclose sequence
(
79 P/F Prot’n Trip n
=
Delayed
).
51c
Activation of the cold load settings.
51-n Inrush Action: Block
Operation of the inrush current detector function.
51-n VTSAction:
Inhibit
Operation of the VT Supervision function.
≥
1
≥
1
General Pickup
51-n
51-n Setting
51-n Charact
51-n Time Mult
51-n Delay (DTL)
51-n Reset
c
Forward
Reverse
51-n Dir Control
Non-Dir
≥
1
&
&
≥
1
&
&
≥
1
&
&
51-n Follower DTL
L1 Dir En
L2 Dir En
L3 Dir En
L1 Dir En
L2 Dir En
L3 Dir En
IL1 Fwd
IL1 Rev
IL2 Fwd
IL2 Rev
IL3 Fwd
IL3 Rev
&
&
&
≥
1
≥
1
≥
1
Non Dir
51-n VTS Action
Off
Inhibit
VT Fail
&
51-n Min. Operate Time
&
IL1
IL2
IL3
50/51
Measurement
&
See Voltage Controlled
Overcurrent (51V)
L1 81HBL2
51c
51-n Inrush
Action
Off
Inhibit
&
L3
L2
L1
L2 81HBL2
L3 81HBL2
&
&
&
&
&
c
Pickup
trip
c
Pickup
trip
c
Pickup
trip
Inhibit 51-n
51-n Element
Enabled
Disabled
&
79 P/F Inst Trips
= 51-n
79 P/F Prot’n Trip n
= Delayed
AUTORECLOSE
If directional elements are not
present this block is omitted and all
'Lx Dir En' signals are set TRUE.
Figure 3-3 Logic Diagram: Time Delayed Overcurrent Element
Содержание 7SR10 Argus Series
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