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2.3.7
Instructions for UL, cUL
(Standard to comply with: UL 508C, CSA C22.2 No. 14)
(1) Installation
Design the enclosure so that the ambient temperature, humidity and
ambience of the inverter will satisfy the above specifications. (Refer
to page 194.)
Branch circuit protection
For installation in the United States, branch circuit protection must be provided, in
accordance with the National Electrical Code and any applicable local codes.
For installation in Canada, branch circuit protection must be provided in accordance
with the Canada Electrical Code and any applicable provincial codes.
(2) Wiring of the power supply and motor
Use the UL-listed cables (rated at 75°C (167°F)) and round crimping terminals to wire
the input (R (L
), S (L
1
terminals with the crimping tool recommended by the terminal manufacturer.
(3) Short circuit ratings
Suitable For Use In A Circuit Capable of Delivering Not More Than 5kA rms
Symmetrical Amperes.
(4) Motor overload protection
When using the electronic thermal relay function as motor overload protection, set the
rated motor current in Pr. 9 "electronic thermal O/L relay".
When connecting two or more motors to the inverter, install external thermal relays for
individual motors
.
Reference: Motor overload protection characteristics
50% setting
100% setting
(Note 1, 2)
(Note 2)
240
180
120
60
0
50
100
150 180200
Inverter output current (%)
(% to rated inverter output current)
), T (L
)) and output (U, V, W) terminals of the inverter. Crimp the
2
3
Protection activating range
Range on the right of characteristic curve
30Hz or higher
Normal operating range
(Note 3)
Range on the left of characteristic curve
20Hz
10Hz
(Note 1) When you set the 50% value (current
Electronic overcurrent
(Note 2) The % value denotes the percentage of
protection for transistor
protection
(Note 3) This characteristic curve will be described
INSTALLATION AND WIRING
value) of the rated inverter output current.
the current value to the rated inverter
output current, not to the rated motor current.
even under operation of 6Hz or higher
when you set the electronic overcurrent
protection dedicated to the Mitsubishi
constant-torque motor.
45
2
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