APPENDIX
141
Appendix 3 Instructions for UL and cUL
(Standard to comply with: UL 508C, CSA C22.2 No.274-13)
General precaution
CAUTION - Risk of Electric Shock -
The bus capacitor discharge time is 10 minutes. Before starting wiring or inspection, switch power off, wait for more than 10
minutes.
ATTENTION - Risque de choc électrique -
La durée de décharge du condensateur de bus est de 10 minutes. Avant de commencer le câblage ou l’inspection, mettez
l’appareil hors tension et attendez plus de 10 minutes.
Installation
The below types of inverter have been approved as products for a UL type 12 enclosure that is suitable for Installation in a
Compartment Handling Conditioned Air (Plenum).
Install the inverter so that the ambient temperature, humidity and ambience of the inverter will satisfy the specifications. (Refer
to page 18.)
The drive must be installed in clean air according to enclosure classification.
Cooling air must be clean, free from corrosive materials and electrically conductive dust regarding the UL Type 12 enclosure.
This enclosure provides protection from airborne dust and light sprays or splashing water from all directions.
Branch circuit protection
For installation in the United States, Class T, Class J, or Class CC fuses, or UL 489 Molded Case Circuit Breaker (MCCB)
must be provided, in accordance with the National Electrical Code and any applicable local codes.
For installation in Canada, Class T, Class J, or Class CC fuses, or UL 489 Molded Case Circuit Breaker (MCCB) must be
provided, in accordance with the Canadian Electrical Code and any applicable local codes.
Maximum allowable rating by the US National Electrical Code. Exact size must be chosen for each installation.
Select an appropriate molded case circuit breaker with a rating that is suitable for the size of the cable.
Wiring to the power supply and the motor
Refer to the National Electrical Code (Article 310) regarding the allowable current of the cable. Select the cable size for 125%
of the rated current according to the National Electrical Code (Article 430).
For wiring the input (R/L1, S/L2, T/L3) and output (U, V, W) terminals of the inverter, use the UL listed copper, stranded wires
(rated at 75°C) and round crimping terminals. Crimp the crimping terminals with the crimping tool recommended by the
terminal maker.
Short circuit ratings
• 400 V class
Suitable for use in a circuit capable of delivering not more than 100 kA rms symmetrical amperes, 500 V maximum.
FR-A846-[]
00023
(0.4K)
00038
(0.75K)
00052
(1.5K)
00083
(2.2K)
00126
(3.7K)
00170
(5.5K)
00250
(7.5K)
00310
(11K)
00380
(15K)
00470
(18.5K)
Rated fuse voltage (V) 500 V or more
Fuse allowable rating (A) 6 10 10 15 25 35 60 70 90 100
Molded case circuit breaker (MCCB)
Maximum allowable rating (A)
15 15 15 20 30 40 60 70 90 100
FR-A846-[]
00620
(22K)
00770
(30K)
00930
(37K)
01160
(45K)
01800
(55K)
02160
(75K)
02600
(90K)
03250
(110K)
03610
(132K)
Rated fuse voltage (V) 500 V or more
Fuse allowable rating (A) 125 150 175 200 250 300 350 400 500
Molded case circuit breaker (MCCB)
Maximum allowable rating (A)
150 175 225 250 450 450 500 ――
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