Chapter 3 - 7SR157 Performance Specification
© 2022 Siemens Protection Devices Limited
Chapter 3 - Page 7 of 18
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 ENATS48-4
Type (maximum threshold) Nominal Voltage
Minimum threshold Maximum withstand
V
BI
19 VDC
24, 48, 60 110, 220 V DC 17 VDC
320 VDC
88 VDC
110, 220 V DC
68.75 VDC
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 can be set for high speed operation. To achieve
immunity from AC interference, a BI pick-up delay of typically one-cycle can be applied. This setting is applied by
default.
1.2.4.2 AC Performance
Attribute
Value
Maximum peak current for
operation
V
BI
= 19 V
1.5mA
Response time @115V
RMS
AC
< 16ms
Response time when programmed to energise an
output relay contact (i.e. includes output relay
operation)
< 26ms
For AC operation the BI pick-up delay should be set to 0ms and the drop-off delay to 25ms.
For AC operation wiring should be less than 10 metres in length.
Содержание 7SR157 Argus
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