Mitsubishi Electric FR-D700 Series Instruction Manual page 52

 For branch circuit protection, select an appropriate UL and cUL listed fuse with a cut-off speed of Class T, Class J, Class
CC, or faster, or a UL 489 molded case circuit breaker (MCCB) in accordance with the following table.
FR-D720-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-D740-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-D720S-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-D710W-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.
 When using the electronic thermal relay function as motor overload protection, set the rated motor current in Pr. 9
Electronic thermal O/L relay.
Pr. 9 = 50% setting of inverter rating*1, 2
70
30Hz
or more
*3
20Hz
60
10Hz
6Hz
0.5Hz
50
240
180
120
60
105%
52.5%
50
Inverter output current (%) (% to the inverter rated current)
NOTE
 The electronic thermal memory retention function is not provided by the drive.
 Short circuit current ratings
 100V class
Suitable for use in a circuit capable of delivering not more than 5kA rms symmetrical amperes, 132V maximum.
 200V class
Suitable for use in a circuit capable of delivering not more than 5kA rms symmetrical amperes, 264V maximum.
 400V class
Suitable for use in a circuit capable of delivering not more than 5kA rms symmetrical amperes, 528V maximum.
48
0.1 0.2
15 15
15 15
15 15
0.4 0.75
6 10
6 10
15 15
0.1 0.2
240V or more
15 20
15 20
15 15
0.1 0.2
115V or more
20 20
20 20
15 15
Pr. 9 = 100% setting of inverter rating*2
30Hz or more
*3
20Hz
Operation range
10Hz
Range on the right of characteristic curve
Non-operation range
6Hz
Range on the left of characteristic curve
0.5Hz
Characteristic when electronic thermal
relay function for motor protection is turned OFF
(when Pr. 9 setting is 0 (A))
Range for
transistor
protection
100
150 200
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
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
0.4 0.75 1.5 2.2
20 30 40 60
20 20 30 50
15 20 25 40
0.4 0.75
40 60
30 50
25 40
This function detects the overload (overheat)
of the motor, stops the operation of the
inverter's output transistor, and stops the
output.
(The operation characteristic is shown on the
left)




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
When using the Mitsubishi
constant-torque motor
1) Set "1" or any of "13", "50", "53" in Pr. 71.
(This provides a 100% continuous torque
characteristic in the low-speed range.)
2) Set the rated current of the motor in Pr. 9.
When 50% of the inverter rated output current
(current value) is set in Pr. 9
The % value denotes the percentage to the
inverter rated output current. It is not the
percentage to the motor rated current.
When you set the electronic thermal relay
function dedicated to the Mitsubishi Electric
constant-torque motor, this characteristic curve
applies to operation at 6Hz or higher.
(For selection of the operation characteristic,
refer to Chapter 4 of the Instruction Manual.)
Electric