Siemens 7SR12 Argus Manual page 121

AC supply loading
Attribute
Voltage
Quiescent Relay (inc. 'PROT HEALTHY' LED)
Backlight
Per LED – (Red or Green)
Per LED – Yellow
Per Binary Output
Optional IEC 61850 Comms Interface
1.2.1.2 Operational Features
Attribute
0% Dip Withstand Period
Dip Immunity Acquisition Period
NOTE: Dips in supply that fall below the minimum voltage for a period greater than the
During conditions of auxiliary input voltage variations which are not described
may enter a safety protection mode where a power supply shutdown occurs. This condition is designed to
protect the power supply from damage as well as prevent internal relay faults from developing into dangerous
situations.
Once the relay has entered this safety mode, it may be necessary to reduce the auxiliary input voltage to zero
volts for up to 30 seconds before re-application of the auxiliary supply will cause the relay to power up and
operate normally.
(1) Using fuses as on/off switches or allowing batteries to run at very low cell voltages for extended periods
and then attempting to re-charge them are examples of such auxiliary supply conditions.
©2017 Siemens Protection Devices Limited
100
7.5
2
0.04
0.08
0.6
5
Value
50ms
5minutes
0% Dip With stand Period will invoke a relay reset.
7SR11 & 7SR12 Performance Specification
VA (RMS)
110 115 120 200
7.5 7.5 7.5
2 2 2 2.1
0.04 0.04 0.04 0.04
0.08 0.08 0.08 0.08
0.6 0.6 0.6 0.7
5 5 5 5.5
Comments
Typical time after switch on to
attain claimed immunity to dips
(1)
in section 1.4.3.1, the relay
230
8 9
2.1
0.04
0.08
0.7
5.5
Chapter 3 Page 9 of 56