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Installation_Guide_SIAB110FC232AC_Rev. 01
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8.2. Self powering
8.2.1. Single phase minimum self-powering checking
Adjust the Sverker current generator with HOLD 160mA, and suddenly, inject it to the
relay, as it would happened in real situation when circuit breaker is close, powering
network line.
8.2.2. Three phase minimum self-powering checking
Adjust the Sverker current generator with HOLD 75mA, and suddenly, inject it to the relay,
as it would happened in real situation when circuit breaker is close, powering network line.
8.2.3. Verification of Leds/Signalling Outputs/LCD in self-powering conditions
Adjust the Sverker current generator with HOLD 160mA, and suddenly, inject it to the
relay, as it would happened in real situation when circuit breaker is close, powering
network line. Once the relay is switched up, increase current injection until 270mA is
reached. At this value, the Leds should be switched on:
8.3. Measurements
The accuracy of the measurement is ±2% on a band of ±20% over the nominal current
and ±4% or ± 5 mA over the rest of the measurement range.
It is shown some examples below:
-
Current inyected => I=1A
:→ ±2% accuracy is complied.
-
Current injected => I=2A as this current value is 20% higher than the nominal
curren
t → 4% accuracy is complied.
8.4. Protection functions
Current injection procedure:
Adjust the Sverker current generator with HOLD 0.2A, and suddenly, inject it to the relay,
as it would happened in real situation when circuit breaker is close, powering network line.
From this value, increase the current to achieve the function pick-up and the function trip.
