1. PREPARATIONS FOR INTRODUCING THE MACHINE
36
[ 2 ] Capacity of non-fuse breaker
for loom
(1) The non-fuse circuit breaker for loom is required to be installed on the switchboard for disconnecting the
power for loom maintenance, inspection or troubleshooting.
(2) It is recommended to provide one non-fuse circuit breaker for each weaving machine.
(3) Frequent tripping will occur if the capacity is insufficient.
(4) Determine the capacity of the non-fuse circuit breaker according to the current flowing through the
weaving machine (see Subsect. 1.3.3, [2] and [3]), the types of installed power transformer and power
supply, and the wiring length.
(5) The capacities on non-fuse circuit breakers obtained by the rough calculation formula are shown in the
table below for reference. Please check if the installed cable can be protected by the breaker selected
according to the tables below.
Shedding motion other than electronic one
Electronic shedding motion
Rough calculation formula
•
Shedding motion for 8 frames
A = Motor rated current In
×
2.5 +
×
1.3
•
Shedding motion for 10 frames
A = Motor rated current In
×
2.5 +
×
1.3
•
Shedding motion for 12 frames
A = Motor rated current In
×
2.5 +
×
1.3
•
Shedding motion for 16 frames
A = Motor rated current In
×
2.5 +
×
1.3
(See page 38, [3] for the motor rated current.)
Non-fuse breaker capacity
(rated current A)
Motor capacity
(kW)
Power supply voltage
350 V or more
200/220 V
2.6
30A
45A
Rough calculation formula
A = Motor rated current
×
4
(See page 38, [3] for the motor rated current.)
3.0
30
60
3.5
50
100
4.0
50
100
5.0
60
100
Non-fuse breaker capacity (rated current A)
Motor
capacity(kW)
No. of heald frames
Power supply voltage (V)
200
220
350
380
400
415
440
500
550
575
1.8
Shedding motion for
8 frames
50
50
30
30
30
30
30
30
30
30
Shedding motion for
10 frames
60
50
30
30
30
30
30
30
30
30
Shedding motion for
12 frames
60
60
40
30
30
30
30
30
30
30
6500
×
Power supply voltage
(V)
3
7300
×
Power supply voltage
(V)
3
8000
×
Power supply voltage
(V)
3
9500
×
Power supply voltage
(V)
3
