7SR21 & 7SR22 Performance Specification
Unrestricted © 2013 Siemens Protection Devices Limited
Page 11 of 68
1.2.1.3
Operational Features
Attribute
Value
Comments
0% Dip Withstand Period
100 ms
Dip Immunity Acquisition Period
5 minutes
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 Withstand Period, will
invoke a relay reset.
During conditions of auxiliary input voltage variations which are not described
(1)
in section 1.4.3.1, the relay
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.
1.2.2 AC Current
Nominal
Measuring Range
In
1 A, 5 A Phase and earth
80 x
In
fn
50 Hz, 60 Hz
47 Hz to 62 Hz
Sample Rate
32 cycles / sec @ 50 Hz
Note. 1 A and 5 A nominal inputs are user selectable on each model.
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 ...
Page 398: ...7SR220 Technical Manual Chapter 4 Page 18 of 96 2017 Siemens Protection Devices Limited ...
Page 414: ...7SR220 Technical Manual Chapter 4 Page 34 of 96 2017 Siemens Protection Devices Limited ...
Page 466: ...7SR220 Technical Manual Chapter 4 Page 86 of 96 2017 Siemens Protection Devices Limited ...
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Page 472: ...7SR220 Technical Manual Chapter 4 Page 92 of 96 2017 Siemens Protection Devices Limited ...
Page 643: ...Unrestricted ...