1. PREPARATIONS FOR INTRODUCING THE MACHINE
48
1.3T Wiring (for towel weaving machine)
NOTE:
For the wiring of the looms other than the label weaving machine with separate inverter, refer
to page 33.
1.3.1
In-plant Electric Facilities
The in-plant electric facilities shall be set up as specified below to make the most of the loom perfor-
mances while maintaining safety.
For details, consult with electric specialists or electric companies.
[ 1 ] Power Requirements
The power supply voltage fluctuation shall be the contracted voltage ±5%, the frequency fluctuation
shall be 50/60 Hz ±2.5% and the voltage unbalance between phases shall be within 3% continu-
ously. Be especially careful in the electric set-up work so that the supply voltage and frequency do
not go out of the specified ranges above even instantaneously.
[ 2 ] Earth leakage breaker
Install an earth leakage breaker in the power supply circuit to prevent hazards which may be caused
by leakage current.
Select the earth leakage breaker in consideration of the high frequency component generated by
the inverter. Please consult with a specialized company.
[ 3 ] Class D grounding
Connect the grounding wires to the grounding terminal (marked PE) in the control box.
[ 4 ] Capacities of non-fuse circuit breakers on switch board
When starting the machine, a rush current at approx. 6 to 7 times the motor rated current flows
instantaneously. Insufficient capacity will cause tripping easily.
[ 5 ] Cable size selection
Frequent warp miss or loom malfuction may occur upon starting of the loom in the delta mode
because of instantaneous voltage drop.
Select a cable size so that the total of supply voltage fluctuation and the voltage drop by the cable is
within 10% of the contracted voltage.
