External Protective Devices - Siel SAFEPOWER-EVO-HF 10 kVA Manual De Instalacion Y Uso

E P
XTERNAL ROTECTIVE
MAGNETOTHERMAL
As explained previously, the UPS 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 B or C.
Please follow the indications in the table below:
UPS mod.
10 kVA
15 kVA
20 kVA
If the protective device upstream from the UPS interrupts the neutral wire, it must also interrupt all the phase
wires at the same time (four-pole switch).
Normal fuses (GI)
Normal switches (C curve)
Ultra-fast fuses (GF)
DIFFERENTIAL
In versions with no input separation transformer, the neutral from the mains power supply is connected to the UPS output
neutral; as a result, there will be no change to the neutral arrangements of the installation:
THE UPS 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 UPS 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 UPS 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
IV330 Rev.001 SIEL S.p.A.
Data di emissione: 2011-09-28
D
EVICES
Automatic external protective devices
Mains input
40A
63A
63A
Output protections (recommended values for discrimination)
In (Nominal current)/7
In (Nominal current)/7
In (Nominal current)/2
Separate bypass input (optional)
40A
63A
63A
In (Nominal current)/7
In (Nominal current)/7
In (Nominal current)/2
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