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18
6. Wiring
18
• Directions on this manual are for use with
standard three-phase motor made by Sumitomo Drive Technologies
.
Use the related motor manual when using
motor with brake
and
motor made by other companies
.
DANGER
●
Do not work on the unit with live wire. Always turn off the power before working on the unit. Otherwise, electric shock may
occur.
●
Connect following the diagram in shown in the terminal box or maintenance manual. Incorrect wiring may cause electric shock
or fire.
●
Do not force to bend, pull, or pinch power cable and motor leadwire. Otherwise, it may cause electric shock or fire.
●
Make sure to ground the ground terminal. Failure to do so may cause electric shock.
●
Follow the standards and regulations for electric facility, extension line, and explosion protection, in addition to maintenance
manual. Failure to do so may cause explosion, ignition, electric shock, injury, fire, or damage to the equipment.
CAUTION
●
Conduct wiring following the standards and regulations for electric facility and extension line.
●
Motor is not equipped with any protective device. But it is mandatory to attach an overload protector to by electric facility
standard. We also recommend installing other protection device such as earth leakage breaker in addition to overload protector.
●
Do not touch the terminal when measuring insulation resistance. Electric shock may occur otherwise.
●
Use electromagnetic switch on the primary side (3-contact type) when using
star delta starter
. Fire may occur otherwise.
●
Use a suppresser filter or reactor on the inverter side, or provide reinforced insulation on the motor side when using a
400V class inverter
to drive the motor. Otherwise, fire or damage may occur by insulation breakdown.
●
Always use the specified combination of motor and inverter when driving explosion protection motor with inverter. The approval
is only for the specific combination.
●
Make sure that there is no explosive atmosphere when measuring insulation resistance for explosion-protection motor. Explosion
or ignition may occur when any explosive gas or steam is near the unit.
• Voltage drops when the cable is long. Use cable with sufficient diameter to keep the voltage drop 2% or less.
• Make sure that there is no loose attachment bolt for terminal box after wiring. Then attach terminal cover for
outdoor type and
explosion proof type
.
6-1 How to Attach and Remove Terminal Cover (for 0.1~0.4kW Three-Phase Motor)
(1) Removal
Hold the side of the terminal box as in Fig. 24. Pull off toward yourself. The cover will come off.
Fig. 24
(2) Attachment
Place the terminal box cover on the terminal box casing. Push until the terminal box clicks back into place.
