Справочник Пользователя для Mitsubishi Electronics FR-D720S-0.1K to 2.2K
13
(2) Total wiring length
The overall wiring length for connection of a single motor or multiple motors should be within the value in the table below.
100V, 200V class
400V class
When driving a 400V class motor by the inverter, surge voltages attributable to the wiring constants may occur at the motor
terminals, deteriorating the insulation of the motor. Take the following measures 1) or 2) in this case.
terminals, deteriorating the insulation of the motor. Take the following measures 1) or 2) in this case.
1) Use a "400V class inverter-driven insulation-enhanced motor" and set frequency in Pr. 72 PWM frequency selection
according to wiring length
2) Connect the surge voltage suppression filter (FR-ASF-H/FR-BMF-H) on the inverter output side.
2.3.4
Wiring of control circuit
(1) Control circuit terminal layout
Pr. 72 PWM frequency selection Setting
(carrier frequency)
0.1K
0.2K
0.4K
0.75K
1.5K or
higher
1 (1kHz) or less
200m
200m
300m
500m
500m
2 to15
(2kHz to 14.5kHz)
30m
100m
200m
300m
500m
Pr. 72 PWM frequency selection Setting
(carrier frequency)
0.4K
0.75K
1.5K
2.2K
3.7K or
higher
1 (1kHz) or less
200m
200m
300m
500m
500m
2 to15
(2kHz to 14.5kHz)
30m
100m
200m
300m
500m
Wiring Length
50m or less
50m to 100m
Exceeding 100m
Carrier frequency
14.5kHz or less
8kHz or less
2kHz or less
NOTE
y
Especially for long-distance wiring, the inverter may be affected by a charging current caused by the stray
capacitances of the wiring, leading to a malfunction of the overcurrent protective function, fast response current limit
function, or stall prevention function or a malfunction or fault of the equipment connected on the inverter output side.
If malfunction of fast-response current limit function occurs, disable this function. If malfunction of stall prevention
capacitances of the wiring, leading to a malfunction of the overcurrent protective function, fast response current limit
function, or stall prevention function or a malfunction or fault of the equipment connected on the inverter output side.
If malfunction of fast-response current limit function occurs, disable this function. If malfunction of stall prevention
function occurs, increase the stall level. (
Refer to Pr. 22 Stall prevention operation level and Pr. 156 Stall prevention
operation selection in the chapter 4 of the Instruction Manual (applied))
y
When using the automatic restart after instantaneous power failure function with wiring length exceeding below,
select without frequency search (Pr. 162 = "1, 11"). (
Refer to Chapter 4 of the Instruction Manual (Applied))
Recommend wire size:
0.3mm
0.3mm
2
to 0.75mm
2
Motor capacity
0.1kW
0.2kW
0.4kW or higher
Wiring length
20m
50m
100m
STF STR
PC
SD
RH
RM
RL
FM
C
B
A
10
2
5
4
RUN SE
S1 S2 SC
SO
SD