Installation and Wiring
20
⑥
Connect the ground to the “
” terminal of the terminal block. Use D class grounding for the ground.
⑦
Connect the utility power supply to the “INPUT L and N” input terminals.
⑧
Connect the customer’s load devices to the “OUPUT L and N“ output terminals.*
⑨
When you have finished the wiring, check that the connections are not loose.
⑩
Attach the upper cover of terminal block cover with four screws removed in step 3.
See the table below, and connect wires of the specified sizes.
Wire Size
Terminal Type
Label
Torque
mm
2
AWG
Input terminals
INPUT L,N
3 N
・
m
8 8
Ground terminal
3 N
・
m
5.5 10
Output terminals
OUTPUT L,N
3 N
・
m
8 8
⑧
Connect the
load device
⑦
Connect the
utility power
supply
⑥
Connect
the
ground
Terminal Connection Procedure
1. Strip about 16mm(0.63in.) of insulation each wire. Insert the wire into the terminals.
2. Tighten the screw hole in the upper of the terminal block with the specified tightening torque
(3 N
・
m) by using a flat-bladed screwdriver.
When disconnecting wires, disconnect the ground last.
Be careful with regards to the polarity of the input power when performing wiring work.
Make sure you connect the ground phase to the N terminal.
Notes on wiring terminal block
Do not connect the following types of load device to the UPS.
Load Devices
Reason
Laser printers, plain paper fax
machines, copy machines, overhead
projectors, vacuum cleaners, dryers,
etc.
Since such devices are subject to high transient current
surges, the UPS will detect current surges and the battery
backup operation will become no longer possible when a
power outage occurs. There is also the danger of the UPS
malfunctioning.
Medical instruments, control devices
for elevators, computer systems
upon which public infrastructure
depends
Special considerations need to be given to operation,
maintenance, and management, such as system
redundancy and the installation of emergency power
generation facilities.
Unsuitable load devices
A breaker for a branch circuit protection of output is needed between the UPS and the customer’s load.
The breaker should be compliant with UL489 and proper for the customer’s load and wiring.
The breaker capacity should be 35A.
*Note
OUTPUT wires
INPUT wires
Ground wire
Tighten the screw
hole from upper side
to connect the wires
using a flat-bladed
screwdriver.
L
N
N
L
⑩
Attach the upper cover of
terminal block cover using
four screws removed in
step 3.
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