Chapter 3) 7SR23 DAD Performance Specification
©2013 Siemens Protection Devices Limited
Chapter 3 Page 7 of 20
1.2.3 Binary (Digital) Outputs
Contact rating to IEC 60255-0-2
Attribute
Value
Carry continuously
5A AC or DC
for 0.5 s
20A AC or DC
Make and carry
(L/R 40 ms and V 300 V)
for 0.2 s
30A AC or DC
AC resistive
1250 VA
AC inductive
250 VA at p.f. 0.4
DC resistive
75 W
Break
( 5 A and 300 V)
DC inductive
30 W at L/R 40ms
50 W at L/R 10ms
Contact Operate / Reset 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
Nominal
Operating Range
19 VDC
17 to 290 VDC
V
BI
88 VDC
74 to 290 VDC
1.2.4.1
Performance
Attribute
Value
V
BI
= 19 V
1.5mA
Maximum DC current for
operation
V
BI
= 88 V
1.5mA
Reset/Operate voltage ratio
90 %
Response time
< 7ms
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.
Summary of Contents for 7SR23 DAD
Page 1: ...Answers for energy 7SR23 DAD High Impedance Protection Relay Reyrolle Protection Devices ...
Page 2: ......
Page 4: ...7SR23 DAD Contents 2013 Siemens Protection Devices Limited ...
Page 60: ...Chapter 3 7SR23 DAD Performance Specification 2013 Siemens Protection Devices Limited ...
Page 225: ......