Siemens 7SR158 Argus, Technical Manual

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Chapter 3) 7SR158 Performance Specification
Chapter 3 - Page 8 of 24 ©2013 Siemens Protection Devices Limited
1.2.3
Binary (Digital) Outputs
Contact rating to IEC 60255-0-2
Attribute Value
Carry continuously 5A AC or DC
Make and carry
(L/R 40 ms and V 300 V)
for 0.5 s 20A AC or DC
for 0.2 s 30A AC or DC
Break
( 5 A and 300 V)
AC resistive 1250 VA
AC inductive
250 VA at p.f. 0.4
DC resistive 75 W
DC inductive
30 W at L/R 40ms
50 W at L/R 10ms
Contact Operate / Release Time 7ms / 3ms
Minimum number of operations 1000 at maximum load
Minimum recommended load 0.5 W at minimum of 10mA or 5V
1.2.4
Binary (Digital) Inputs
DC operation EATS48-4
Nominal Operating Range
V
BI
19 VDC 17 to 320 VDC
88 VDC 74 to 320 VDC
AC operation
Nominal Operating Range
V
BI
19 VDC 92 to 138 V
RMS
AC
1.2.4.1 DC Performance
Attribute Value
Maximum DC current for
operation
V
BI
= 19 V 1.5mA
V
BI
= 88 V 1.5mA
Reset/Operate voltage ratio 90 %
Response time < 9ms
Response time when programmed to energise an
output relay contact (i.e. includes output relay
operation)
< 20ms
The binary inputs have a low minimum operate current and may be set for high speed operation. Where a binary
input is both used to influence a control function (e.g. provide a tripping function) and it is considered to be
susceptible to mal-operation due to capacitive currents, the external circuitry can be modified to provide immunity
to such disturbances.
To comply with EATS 48-4, classes ESI 1 and ESI 2, external components / BI pick-up delays are required as
shown in fig. 1-1.
To achieve immunity from AC interference, a BI pick-up delay of typically one-cycle can be applied.