Motor Overload Protection - Mitsubishi Electric FR-E700 Basic Instruction Manual

Appendix 3 Instructions for UL and cUL
(Standard to comply with: UL 508C, CSA C22.2 No. 14)
1. General Precaution
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.
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 above specifications.
Wiring protection
For installation in the United States, branch circuit protection must be provided in accordance with the National Electrical Code and
any applicable provincial codes.
For installation in Canada, branch circuit protection must be provided in accordance with the Canadian Electrical Code and any
applicable provincial codes.
Provide the appropriate UL and cUL listed Class T type fuse that is suitable for branch circuit protection in accordance with the table
below.
FR-E720- K
Rated fuse voltage(V)
Without power factor
Fuse Maximum
improving reactor
allowable rating
With power factor
(A)∗
improving reactor
Molded case circuit breaker (MCCB)
Maximum allowable rating (A)*
FR-E740- K
Rated fuse voltage(V)
Without power factor
Fuse Maximum
improving reactor
allowable rating
With power factor
(A)∗
improving reactor
Molded case circuit breaker (MCCB)
Maximum allowable rating (A)*
FR-E720S- K
Rated fuse voltage(V)
Without power factor
Fuse Maximum
improving reactor
allowable rating
With power factor
(A)∗
improving reactor
Molded case circuit breaker (MCCB)
Maximum allowable rating (A)*
FR-E710W- K
Rated fuse voltage(V)
Without power factor
Fuse Maximum
improving reactor
allowable rating
With power factor
(A)∗
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.
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
⋅ The cables used should be 75°C copper cables.
⋅ Tighten the terminal screws to the specified torques.
Undertightening can cause a short or misoperation.
Overtightening can cause the screws and unit to be damaged, resulting in a short or misoperation.
⋅ Use the UL approved round crimping terminals. Crimp the terminals with the crimping tool recommended by the terminal manufacturer.

5. Motor overload protection

When using the electronic thermal relay function as motor overload protection, set the rated motor current to Pr. 9 "Electronic thermal
O/L relay". (
Refer to page 41
138
0.1 0.2 0.4
15 15 15
15 15 15
15 15 15
0.4 0.75 1.5
6 10 15
6 10 10
15 15 15
0.1 0.2 0.4
240V or more
15 20 20
15 20 20
15 15 15
0.1 0.2 0.4
115V or more
20 20 40
20 20 30
15 15 25
)
0.75 1.5 2.2 3.7 5.5
240V or more
20 30 40 60 70
20 20 30 50 60
15 20 25 40 60
2.2 3.7 5.5 7.5 11
480V or more
20 30 40 70 80
15 25 35 60 70
15 20 30 40 50
0.75 1.5 2.2
30 40 60
20 30 50
20 25 40
0.75
60
50
40
7.5 11 15
80 150 175
70 125 150
80 110 150
15
90
90
70