L2275
Emax UL
64/132
Doc. N°
Mod.
RH0109002
Apparatus
Scale
Page N°
15.2.2 Electrical characteristics
Nominal operating frequency
50/60 Hz ±10%
Pass band
1200 Hz max
Peak factor
2.1 max @ 4 In
MTBF (MIL-HDBK-217E)
15 years @ 45°C
15.2.2.1
Self-supply
All the protection functions are operational without an external auxiliary power supply. In fact, self-supply is guaranteed by the CTs installed in
the power circuit breaker.
Minimum busbar current for turning the trip unit on:
– 0.35xIn with single-phase current
– 0.20xIn with two-phase current
– 0.15xIn with three-phase current
Minimum busbar current for turning the display on (not rear-lit):
– 0.50xIn with single-phase current
– 0.30xIn with two-phase current
– 0.20xIn with three-phase current
The display lighting up time is about 3 seconds.
15.2.2.2
Auxiliary power supply
The Auxiliary power supply guarantees operation of the PR113 in any condition, even with the power circuit breaker open or with circulating current
lower than the values mentioned in the previous paragraph.
A sudden drop or loss of the Vaux does not have any effect on the protection functions, since, if involved in a fault current, this guarantees self-
supply.
The Vaux is necessary for some special functions/performances (e.g. SdZ, communication, rear illumination of the display … ).
The time for reaching normal running of the PR113, from the moment of connection of the Vaux is about 5 s.
Since a Vaux insulated from ground is required, it is necessary to use “galvanically separate converters” conforming to the
IEC 60950 (UL 1950) Standards or their equivalent [which guarantee a common mode current or leakage current (see IEC
478/1, CEI 22/3) not higher than 3.5mA], IEC 60364-41 and CEI 64-8.
Characteristics
PR113/P-A Version
Power supply voltage
24V DC ±20%
Maximum ripple
5%
Inrush Current @ 24 V
~3A for 30 ms
Start-up Current @ 24 V
~1.0A for 150 ms
Continuous current rating @ 24 V
~200mA
Nominal Power @ 24 V
~5W
15.2.3 Environmental characteristics
Operating temperature
-25°C ... +70°C
Storage temperature
-40°C ... +90°C
Relative Humidity
0% ... 98% with condensation
Degree of protection (with PR113 installed in the power circuit breaker) IP 30