Mitsubishi Electric FR-E720-0.4K Instruction Manual page 54

Appendix 2 Instructions for UL and cUL
(Standard to comply with: UL 508C, CSA C22.2 No. 274)
1. 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,
and check for residual voltage between terminal P/+ and N/- with a meter etc., to avoid a hazard of electrical shock.
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.
2. Installation
The below types of inverter have been approved as products for use in enclosure and approval tests were conducted under the
following conditions. Design the enclosure so that the surrounding air temperature, humidity and ambience of the inverter will satisfy
the specifications. (Refer to page 45.)
Branch Circuit Protection
Integral solid state short circuit protection does not provide branch circuit protection. Branch circuit protection must be provided in
accordance with the National Electrical Code for the U.S. or the Canadian Electrical Code for Canada and any additional codes. As
specified, UL Class T, Class J, Class CC fuses, or any faster acting fuse with the appropriate rating or listed UL 489 molded case
circuit breaker (MCCB), or Type E combination motor controller must be employed.
FR-E720-K
Rated fuse voltage(V)
Without power factor
improving reactor
Fuse allowable
rating (A)
With power factor
improving reactor
Molded case circuit breaker (MCCB)
Maximum allowable rating (A),
Maximum current rating (A)
Type E combination
motor controller
Maximum SCCR (kA)
FR-E740-K
Rated fuse voltage(V)
Without power factor
improving reactor
Fuse allowable
rating (A)
With power factor
improving reactor
Molded case circuit breaker (MCCB)
Maximum allowable rating (A),
Maximum current rating (A)
Type E combination
motor controller
Maximum SCCR (kA)
FR-E720S-K
Rated fuse voltage(V)
Without power factor
improving reactor
Fuse allowable
rating (A)
With power factor
improving reactor
Molded case circuit breaker (MCCB)
Maximum allowable rating (A),
FR-E710W-K
Rated fuse voltage(V)
Without power factor
improving reactor
Fuse allowable
rating (A)
With power factor
improving reactor
Molded case circuit breaker (MCCB)
Maximum allowable rating (A),

Maximum allowable rating by 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.

For UL/cUL certification, use the following product.
Model
MMP-T32

Suitable for use in a circuit capable of delivering not more than 50 or 25 kA rms symmetrical amperes, 480Y/277 volts maximum when protected by the Type
E combination motor controllers indicated in the above table.
3. Short circuit ratings
• 100V class
Suitable for use in a circuit capable of delivering not more than 100 kA rms symmetrical amperes, 132 V maximum.
200V class
•
Suitable for use in a circuit capable of delivering not more than 100 kA rms symmetrical amperes, 264 V maximum.
• 400V class
Suitable for use in a circuit capable of delivering not more than 100 kA rms symmetrical amperes, 528 V maximum.
4. Wiring
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 crimp terminals. Crimp the crimp terminals with the crimping tool recommended by the terminal maker.
50
0.1 0.2
15 15
15 15
15 15
1.6 4
50 50
0.4 0.75
6 10
6 10
15 15
4 6.3
50 50
0.1 0.2
15 20
15 20
15 15
0.1 0.2
115V or more
20 20
20 20
15 15
Manufacturer Rated Voltage, Vac
Mitsubishi Electric Corp. 480Y/277
0.4 0.75 1.5 2.2 3.7
240V or more
15 20 30 40 60
15 20 20 30 50
15 15 20 25 40
6.3 10 13 18 25
50 50 50 50 25
1.5 2.2 3.7 5.5 7.5
480V or more
15 20 30 40 70
10 15 25 35 60
15 15 20 30 40
8 10 18 25 32
50 50 50 25 25
0.4 0.75 1.5 2.2
240V or more
20 30 40 60
20 20 30 50
15 20 25 40
0.4 0.75
40 60
30 50
25 40
5.5 7.5 11 15
70 80 150 175
60 70 125 150
60 80 110 150
   
   
11 15
80 90
70 90
50 70
 
 