3.2
Connecting the Cable
11
Preparation before connecting the cable
Important
When connecting the UPS to a three-phase power supply system, be sure
to connect the grounding phase of the three-phase power supply system
to the electrode of a grounding side of the AC input of the UPS.
If connecting to an un-grounding power supply, there is a possibility of becoming the
cause of the malfunction.
When using a generator temporarily during the rolling blackouts, use a
generator satisfying the following specification.
If connecting a generator not satisfying the following specification to the input part of
the UPS, there is a possibility of becoming the cause of the malfunction or damage of
the UPS.
Voltage variation: 85 to 138 VAC
Frequency variation: within rated frequency ± 5% (1Hz/sec.)
Voltage waveform distortion: within 5%
Voltage zero-cross condition: Zero-cross must not occur twice or more in 1
cycle.
1.
Confirm the input power supply. The input power supply which can connect with
this UPS is as follows.
UPS model
Breaker
capacity
Input
capacity
Input
voltage
Input
frequency
Number of
phase
M-UPS
050AD1C
M-UPS050
AD1B
75A or
more
5kVA
85 to 138 VAC
50/60Hz
± 5% (Note)
Single-phase
two-wire
Remarks If the input voltage and the frequency are out of this range, the UPS may
become the following state or be damaged.
When the UPS is turned on:
The UPS will become the “input error at startup”. In this case, the UPS
cannot be started up.
While the UPS is operating:
“
Abnormalities of input voltage” is detected and the battery operation
is performed. If the UPS is connected to an input power supply which
gets out of this range frequently, by repeating the charge and discharge
of the battery, the battery will be in an empty state or will become the
cause of damage.
Note) The input frequency is automatically chosen according to the area in which
the UPS is used.
Summary of Contents for M-UPS050AD1B
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