Siemens 7SR157 Argus, Manual

Page: 62 / 180

7SR158 Technical Manual
Chapter 3 - Page 6 of 18 © 2022 Siemens Protection Devices Limited
AC supply loading
Attribute VA (RMS)
Voltage 100 110 115 120 200 230
Quiescent Relay (inc. ‘PROT HEALTHY’ LED) 7.5 7.5 7.5 7.5 8 9
Backlight 2 2 2 2 2.1 2.1
Per LED – (Red or Green) 0.06 0.06 0.06 0.06 0.06 0.06
Per LED – Yellow 0.10 0.10 0.10 0.10 0.10 0.10
Per Binary Output 0.6 0.6 0.6 0.6 0.7 0.7
Optional IEC 61850 Comms Interface 5 5 5 5 5.5 5.5
1.2.1.2 Operational Features
Attribute Value Comments
0% Dip Withstand Period 50ms
Dip Immunity Acquisition Period 5minutes
Typical time after switch on to
attain claimed immunity to dips
NOTE: Dips in supply that fall below the minimum voltage for a period greater than the
0% Dip With stand Period will invoke a relay reset.
During conditions of auxiliary input voltage variations which are not described (1) in section 1.2.1 and 1.4.3.1,
relays with HV or LV PSU modules 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, are examples of such auxiliary supply conditions.
1.2.2
AC Analogue Voltage
Attribute Nominal Operating Range
Vn 40 to 160 Vrms 0 to 200 Vrms
Fn 50, 60Hz 47.5 to 52.5Hz and 57.0 to 63.0Hz
1.2.2.1 Burden
Attribute Value
AC Burden 0.02 VA @ 63.5 V, ≤ 0.06 VA @ 110 Vrms
1.2.2.2 Thermal Withstand
Attribute Value
Overvoltage Withstand (Continuous) 300 Vrms