G-Tec Sirius 20 kVA, Руководство пользователя

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17
E
XTERNAL
P
ROTECTIVE
D
EVICES
AUTOMATIC CIRCUIT BREAKER
As illustrated previously, the UPS is equipped with protective devices for failures both inside and at the output.
When connecting the mains power supply, ensure that a type B or C (time curve) breaker is installed upstream of the
UPS in accordance with the EN 60947-2 standard, as indicated in the table below:
Automatic external protective devices
UPS mod. Mains input Separate bypass input (optional)
10 40A 40A
12 40A 40A
15 63A 63A
20 63A 63A
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).
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 the standard version, with no separating transformer at the input, the neutral from the power supply network is
connected to the neutral of the UPS output, the neutral condition of the system is not modified:
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.
Avoid connecting the output neutral to the input neutral or the earth as this could cause damage to the
UPS.
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 adequate for the sum of the 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