Output Config - Siemens 7SG164 Ohmega 400 Series Manual

Start AUX DC SOTF
Input connected to CB auxiliary contact to initiate DC SOTF from this source.
Switch Settings Grp
When this SI is energised, the relay will switch groups, from the currently active group to the Alternate Setting
Group defined in the System Config Menu. The relay will remain in the alternate setting group until the SI is de-
energised, when the relay will revert to the previous setting group.
Inhibit Group Switch
Energising this status input will prevent the relay from changing groups when the Switch Settings group Input is
energised.
Inverted Inputs
Any inputs which are selected here will be inverted, i.e. de-energisation of the input will be considered as a logical
'1' input to their applicable logic diagram.

2.7 Output Config

Depending upon the configuration of the relay there are a large number of signals which can be mapped to output
contacts.
Protection Healthy
This output monitors the condition of the relay and dc power supply to the relay. This is usually mapped to one of
the changeover outputs, and connected to the normally closed contact (by default relay 1). When this function is
selected it will permanently operate the selected relay. By using a normally closed contact if there is any failure
then this contact will close giving a fail-safe alarm condition.
Zone 1
Zone 2
Zone 3
Zone 4
Indicates the Zones involved in the fault. Note these outputs are not starters – they will have the same time-
delayed operation as the zones themselves.
Zone 1 Start
Zone 2 Start
Zone 3 Start
Zone 4 Start
Indicates the Zones involved in the fault. This will indicate the non-time delayed operation of the zones, ie. the
zone starters.
Phase A Fault
Phase B Fault
Phase C Fault
Indicates the phase(s) involved in the fault condition
Earth Fault
Operates when the fault involves an earth path.
Trip Output
This is used as the initiation for the tripping of the local circuit breaker. Depending on the settings of the relay, this
may be operated by any of the distance elements, Highset Overcurrent, etc.
Aided Trip
Operates when the relay operation was aided by the active scheme, i.e. indicates whether it was a simple time
stepped distance trip or not.
High Set
Indicates operation of the Highset Overcurrent element.
Stub Protection
Indicates Operation of the Stub Protection.
Z2 TD Override Trip
If the zone 2 TD Override feature is used, when the status input assigned to Z2 TD Override is energised, this
output contact will operate.
©2013 Siemens Protection Devices Limited
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7SG1641 Ohmega 402 60 Relay Settings
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Chapter 4 Page 16 of 20