7SR210 & 7SR220 Description of Operation
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©2018 Siemens Protection Devices Limited
Figure 4.10-1 Voltage Detector Operation
Live and Dead outputs are provided for each voltage input:
A Live, B Live, C Live, A Dead, B Dead, C Dead, X Live, Y Live, Z Live, X Dead, Y Dead & Z Dead,
Combined outputs are also provided separately to indicate ALL phases Live or Dead:
ABC Live, ABC Dead, XYZ Live & XYZ Dead
4.11 Circuit Breaker
This menu includes relay settings applicable to both manual close (MC) and auto-reclose (AR) functionality.
CB Controls Latched
CB controls for closing and tripping can be latched i.e. until confirmation that the action has been completed i.e.
binary input is edge triggered when latched.
Close CB Delay
The Close CB Delay is applicable to manual CB close commands received through a
Close CB
binary input or
via the Control Menu. Operation of the
Manual Close CB
binary output is delayed by the
Close CB Delay
setting.
NB: During the close countdown period the operation can be terminated by pressing ‘Cancel’ on the fascia.
Close CB Pulse
The duration of the
CB Close Pulse
is settable to allow a range of CBs to be used. The Close pulse will be
terminated if any protection pick-up operates or a trip occurs. This is to prevent Close and Trip Command pulses
existing simultaneously. A
79 Close On Fault
Output is given if a pick-up or trip operates during the Close Pulse.
This can be independently wired to Lockout.
‘CB Failed To Open’ and ‘CB Failed to Close’ features are used to confirm that a CB has not responded correctly
to each Trip and Close Command. If a CB fails to operate, the AR feature will go to lockout.
’79 CB Close Fail’ is issued if the CB is not closed at the end of the close pulse,
CB Close Pulse
.
Reclaim Timer
The ‘Reclaim time’ will start each time a Close Pulse has timed out and the CB has closed.
Where a protection pickup is raised during the reclaim time the relay advances to the next part of the reclose
sequence.
The relay goes to the Lockout state if the CB is open at the end of the reclaim time or a protection operates during
the final reclaim time.
Summary of Contents for Argus 7SR21
Page 1: ...Energy Management 7SR21 7SR22 Argus Overcurrent Relay Reyrolle Protection Devices ...
Page 2: ......
Page 4: ...Contents 7SR11 and 7SR12 Page 2 of 2 2018 Siemens Protection Devices Limited ...
Page 185: ...7SR210 Settings Guide Unrestricted 2018 Siemens Protection Devices Limited Page 61 of 61 ...
Page 277: ...7SR220 Settings Guide Unrestricted Page 72 of 107 2013 Siemens Protection Devices Limited ...
Page 382: ...7SR220 Technical Manual Chapter 4 Page 2 of 96 2017 Siemens Protection Devices Limited ...
Page 386: ...7SR220 Technical Manual Chapter 4 Page 6 of 96 2017 Siemens Protection Devices Limited ...
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