Inrush Detector; Control & Logic; Autoreclose Prot'n - Siemens Argus 7SR21 Technical Manual

3.5.6.

Inrush Detector

Description
Gn 81HBL2 Element
Selects whether the phase inrush detector 81HBL2 is enabled
Gn 81HBL2 Bias
Selects the bias method used for magnetising inrush. Phase –
Segregated, each phase blocks itself. Cross – Blocked, each phase can
block the operation of other phases. Sum - Of Squares, each phase
blocks itself using the square root of the sum of squares of the 2nd
harmonic.
Gn 81HBL2 Setting
The magnetising inrush detector operates when the 2nd harmonic current
exceeds a set percentage of the fundamental current
3.6. Control & Logic
3.6.1.

Autoreclose Prot'n

Description
Gn 79 P/F Inst Trips
Selects which phase fault protection elements are classed as
Instantaneous elements and start an autoreclose sequence. These will be
blocked from operating during Delayed autoreclose sequences. See
autoreclose section of manual for detail of what elements can cause only
Delayed protection to be used.
Gn 79 E/F Inst Trips
Selects which earth fault protection elements are classed as
Instantaneous elements and start an autoreclose sequence. These will be
blocked from operating during Delayed autoreclose sequences. See
autoreclose section of manual for detail of what elements can cause only
Delayed protection to be used.
Gn 79 SEF Inst Trips
Selects which sensitive earth fault protection elements are classed as
Instantaneous elements and start an autoreclose sequence. These will be
blocked from operating during Delayed autoreclose sequences. See
autoreclose section of manual for detail of what elements can cause only
Delayed protection to be used.
Gn 79 P/F Delayed Trips
Selects which phase fault protection are classed as Delayed elements,
any selected elements operating will start an autoreclose sequence.
Gn 79 E/F Delayed Trips
Selects which earth fault protection are classed as Delayed elements,
any selected elements operating will start an autoreclose sequence.
Gn 79 SEF Delayed Trips
Selects which sensitive earth fault elements are classed as Delayed
elements, any selected elements operating will start an autoreclose
sequence.
Gn 79 P/F HS Trips
Selects which phase fault elements are classed as High Set elements,
any selected elements operating will start an autoreclose sequence.
Gn 79 E/F HS Trips
Selects which earth fault elements are classed as High Set elements, any
selected elements operating will start an autoreclose sequence.
Unrestricted ©2018 Siemens Protection Devices Limited
Range
Disabled, Enabled
Phase, Cross, Sum
0.1, 0.11 ... 0.49, 0.5
Range
Combination of ( 51-1, 51-2, 50-1,
50-2 )
Combination of ( 51N-1, 51N-2,
50N-1, 50N-2, 51G-1, 51G-2, 50G-
1, 50G-2 )
Combination of ( 51SEF-1, 51SEF-
2, 50SEF-1, 50SEF-2 )
Combination of ( 51-1, 51-2, 50-1,
50-2 )
Combination of ( 51N-1, 51N-2,
50N-1, 50N-2, 51G-1, 51G-2, 50G-
1, 50G-2 )
Combination of ( 51SEF-1, 51SEF-
2, 50SEF-1, 50SEF-2 )
Combination of ( 50-1, 50-2 )
Combination of ( 50N-1, 50N-2,
50G-1, 50G-2 )
7SR210 Settings Guide
Default
Disabled
Cross
0.2 xI
Default
----
--------
----
51-1, 51-2, 50-1,
50-2
51N-1, 51N-2,
50N-1, 50N-2,
51G-1, 51G-2,
50G-1, 50G-2
51SEF-1, 51SEF-
2, 50SEF-1,
50SEF-2
--
----
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