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E
XTERNAL
P
ROTECTIVE
D
EVICES
MAGNETOTHERMAL
As explained previously, the TRIPOWER X31 HE has protection devices for output faults as well as for internal faults.
In order to set up the power line, install a magnetothermal switch upstream from the UPS with intervention curve C. Please follow
the indications in the table below:
Automatic external protections
UPS Model
Mains input
Separate bypass input (P+N)
Single-phase input (P+N)
Three-phase input (3P+N)
TriPower X31 HE
10 – 12 – 15 – 20 kVA
100A
100A
N.D.
TriPower X31 HE with
separate bypass
15 – 20 kVA
100A
63A
100A
TriPower X31 HE with
separate bypass
10 – 12 kVA
63A
40A
100A
If the protective device upstream from the TRIPOWER X31 HE interrupts the neutral wire, it must also interrupt all
the phase wires at the same time (four-pole switch).
Output protections (recommended values for discrimination)
Normal fuses (GI)
In (Nominal current)/7
In (Nominal current)/7
Normal switches (C curve)
In (Nominal current)/7
In (Nominal current)/7
Ultra-fast fuses (GF)
In (Nominal current)/2
In (Nominal current)/2
DIFFERENTIAL
In versions with no input separation transformer, the neutral from the mains power supply is connected to the TRIPOWER X31
HE output neutral; as a result, there will be no change to the neutral arrangements of the installation:
THE TRIPOWER X31 HE INPUT NEUTRAL IS CONNECTED TO THE UPS OUTPUT NEUTRAL
THE DISTRIBUTION SYSTEM THAT POWERS THE UPS IS NOT MODIFIED BY THE UPS
The neutral condition is only modified if an isolation transformer is present or when the TRIPOWER X31 HE works
with a neutral isolated upstream.
Make sure that the equipment is connected correctly to the input neutral because as damage may be caused
to the UPS.
During operation with the mains supply present, a differential switch (RCD) at the input to the TRIPOWER X31 HE will activate
should a fault occur on the output side as the output circuit is not isolated from the input circuit.
In any case, other differential switches may still be installed on the output, preferably in coordination with those present at the
input.
The differential switch located upstream must have the following characteristics:
Differential current adjusted to the sum of UPS + Load; we recommend a suitable margin be kept to prevent unwanted
activation (100mA min. - 300mA recommended)
Type B or type A
Delay of at least 0.1s
Summary of Contents for Tri Power X31 HE
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