Functional Performance; Instrumentation; Real Time Clock - Siemens 7SR18 Solkor Manual

1.2.5.2 AC Performance
Attribute
Maximum peak current for
operation
Response time >115 V AC
RMS
Response time when programmed to energise an
output relay contact (i.e. includes output relay
operation)
For AC operation the BI pick-up delay should be set to 0 ms and the drop-off delay to 25 ms.
For AC operation wiring should be less than 10 metres in length.
1.3

Functional performance

1.3.1

Instrumentation

Instrument Value
I Current
V Voltage
W,Var,
Power, real and apparent
VA
pf Power factor
F Frequency
1.3.2

Real Time Clock

1.3.2.1 Internal Clock
The specification below applies only while no external synchronisation signal (e.g. 60870-5-103) is being
received.
Attribute
o o
Accuracy (-10 C to +55 C)
Unrestricted ©2018 Siemens Protection Devices Limited
Value
V = 19 V 1.5 mA
BI
< 16 ms
< 26 ms
Reference
0.1 xIn £ I £ 3.0 xIn
0.8 xVn £ V £ 1.2 xVn
V = Vn, I ³ 0.1 xIn, pf ³ 0.8
V = Vn, I ³ 0.1 xIn, pf ³ 0.8
F = 47.5 to 52.5Hz @ 50Hz
and 57 to 63Hz @60Hz
Value
± 3.5 p.p.m
7SR18 Performance Specification
Typical accuracy
± 1 % In
± 1 % Vn
± 3% Pn, where Pn = Vn x In
± 0.05
± 10mHz
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