Instruction manual

20
INSTALLATION AND WIRING
2.2.2 Wiring of the Main Circuit
(1) Wiring instructions
1) It is recommended to use insulation-sleeved crimping terminals for power supply and
motor cables.
2) Application of power to the output terminals (U, V, W) of the inverter will damage the
inverter. Never perform such wiring.
3) After wiring, wire off-cuts must not be left in the inverter.
Wire off-cuts can cause an alarm, failure or malfunction. Always keep the inverter clean.
When drilling mounting holes in a control box etc., be careful so that chips and others
do not enter the inverter.
4) Use thick cables to make the voltage drop 2% or less.
If the wiring distance is long between the inverter and motor, a main circuit cable voltage
drop will cause the motor torque to decrease, especially at the output of a low frequency.
(A selection example for the wiring length of 20m (65.62 feet) is shown on page 22.)
5) The overall wiring length should be 500m (1640.40feet) maximum.
Especially for long distance wiring, the fast-response current limit may be misactivated
under the influence of a charging current due to the stray capacitance of the wiring.
The fast-response current limit must be turn off by Pr.156 when the total wiring length
is more than the indicated value in the following table for M4500E-001 to 010.
(Unit: m (feet))
Even though the fast-response current limit is turned off , in more long distance wiring
situations the over current protection may be misactivated or the devices connected
to the output side may misoperate or become faulty under the influence of a charging
current due to the stray capacitance of the wiring.
Therefore, the maximum overall wiring length should be as indicated in the following
table. (When two or more motors are connected to the inverter, the total wiring length
should be within the indicated value.)
Inverter Capacity
001 002 003 005 007.5 010
Non-low acoustic
noise mode
100
(328.08)
100
(328.08)
100
(328.08)
200
(656.16)
400
(1312.34)
500
(1640.40)
Low acoustic
noise mode
100
(328.08)
100
(328.08)
100
(328.08)
200
(656.16)
300
(984.24)
400
(1312.34)
Inverter Capacity
001 002 003 005 or more
Total wiring length
100 (328.08) 200 (656.16) 300 (984.24) 500 (1640.40)
(Unit: m (feet))
Overall wiring length (005 or more)
500m (1640.40 feet)
maximum
300m
(984.24 feet)
300m
(984.24 feet)
300m (984.24 feet)+300m (984.24 feet)=600m (1968.48 feet)
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