1.3 Wiring (for looms other than towel weaving machine)
35
1.3.2
Circuit Breakers
*1
Group inverter 2 is not installed in case of individual inverter specification. The inverter, inverter
breaker and related wiring shown here, therefore, are unnecessary.
[ 1 ] Capacity of non-fuse circuit breaker
for inverter
Provide one non-fuse circuit breaker on the inlet side for each inverter.
(1) The capacity of the non-fuse circuit breaker on the inlet side of the inverter shall be determined
according to 1.5 times the rating of the inverter used (inverter overload endurance limit), the type and
length of the cable to be used and the capacity of the power supply transformer in the plant.
(2) The capacities of non-fuse circuit breakers obtained by the rough calculation formula. Please check if the
installed cable can be protected by the non-fuse circuit breaker selected according to the following table:
Non-fuse circuit breaker capacity
(rated current A)
Inverter
model
Inverter rating
(kVA)
Power supply voltage
400 V or above 380-350 V
200/220V
7P5L
11
30A
30A
50A
Rough calculation formula
A
≥
×
1.5
011L
16
40
40
75
018L
26
60
75
125
022L
32
75
100
150
*1
1: Plant switchboard
2: Group inverter
3: Loom line A
4: Loom line B
5: Loom line C
: Non-fuse circuit breaker(s) for inverter(s)
: Non-fuse circuit breaker(s) for loom(s)
①
: Cable between the switchboard breaker and the inverter
②
: Cables between the inverter and looms
③
: Cables between switchboard breakers and looms
Inverter rating
×
Power supply voltage
3
