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5.3. CONNECTIONS.
This chapter is about how to wire the input and output of the UPS
and its connection with the EBM/BM-R/PDU and the parallel card.
Always keep a free space of 500 mm at the rear of the UPS.
Check that the indications on the name plate located on the
top cover of the UPS match the AC power source and the
true electrical consumption of the total load.
5.3.1. Input/Output wiring specifications.
Before wiring the UPS, the input switch and backfeed
protection contactor must be set to prevent power backfeed
to the input.
The installer or qualified personnel must add a "backfeed voltage
hazard" warning label to the contactor or backfeed device.
Before operating, disconnect the UPS input and check the voltage
at all terminals in order to avoid dangerous voltages. The backfeed
contactor rated current must be higher than the UPS input rated
current.
The following figure shows how to wire the input and output of
the UPS:
The breaker also can be used as
disconnect device
PE N
L
Fig. 36. UPS I/O connection diagram.
Danger
The rated current of the input protection circuit breaker
must be higher than the input current of the UPS, otherwise it
may burn.
Recommended upstream protection and downstream switch:
Power
Input circuit breaker
4000-6000 VA
D Curve - 63 A (1 phase)
8000-10000 VA
D Curve - 100 A (1 phase)
Fig. 37. Protection rating.
Read the safety instructions regarding backfeed protection
requirements.
68
Contactor
Breaker
Coil
backfeed
contactor
63 A (1 phase) 40 A (1 phase)
100 A (1 phase) 63 A (1 phase)
Recommended minimum wiring sections:
Wiring
Earth wire
Input wire L, N
Output wire L, N
Battery cable
Fig. 38. Wiring sections.
It is recommended that the length of the output cable does not
exceed 10 metres in order to avoid radio interference. If a longer
length is requested, consult the Distributor for more details.
5.3.2. Input/Output wiring.
High leakage current:
It is essential to connect the earth before connecting
the supply.
This type of connection must be made by qualified
electricians.
Before making any connection, check that the upstream protection
devices (mains and bypass circuit breaker) are open "O" (Off).
Always connect the earth wire first.
AC Input
L
N
UPS
PE
Remove the cover of the connection terminal.
1.
Connect the AC cable to the connection terminal.
2.
It is important to respect the polarity indicated in Fig. 39
and Fig. 40, depending on the model, before connecting the
power.
Output
switch
NOTE: The UPS charges the battery as soon as it is
connected to the AC power source, even if the power
button is not pressed.
Once the UPS is connected to the AC power source, a minimum of
8 hours of charging is required before the battery can provide the
nominal backup time.
Do not connect loads that in their entirety exceed the
specifications of the device, as this would cause
inconvenient cuts in the power supply of the loads connected to the
output.
4/5/6 kVA models
8/10 kVA models
(standard + B1)
(standard + B1)
10 mm
2
6 mm
2
AC Output
Switch
L
N
PE
10 mm
2
Load
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