Wiring
• Do not connect the DC terminals (P(+) and N(-)) to the connection terminals on the inverter side in mistake for the
polarity
(
+ and –
)
.
• Use wires in the specified size.
• Tighten terminals with specified torque.
Otherwise, a fire could occur.
• Be sure to ground the grounding terminals ( G).
Otherwise, an electric shock or a fire could occur.
• Qualified electricians should carry out wiring.
• Be sure to perform wiring after turning the power OFF.
• Be sure to perform wiring after installing the inverter unit.
Otherwise, an electric shock could occur.
• In general, sheaths of the control signal wires are not specifically designed to withstand a high voltage (i.e.,
reinforced insulation is not applied). Therefore, if a control signal wire comes into direct contact with a live
conductor of the main circuit, the insulation of the sheath might break down, which would expose the signal wire to
a high voltage of the main circuit. Make sure that the control signal wires will not come into contact with live
conductors of the main circuit.
Doing so could cause an accident or an electric shock.
• Before changing the slide switches on the control printed circuit board,
turn the power OFF, wait at least ten
minutes,
and make sure that the charging lamp are turned OFF. Further, make sure, using a multimeter or a similar
instrument, that the DC link bus voltage between the terminals P(+) and N(-) has dropped to the safe level (+25 VDC
or below).
An electric shock could occur.
• The PWM converter, inverter, motor and wiring generate electric noise. Be careful about malfunction of the nearby
sensors and devices. To prevent them from malfunctioning, implement noise control measures.
Otherwise an accident could occur.
Operation
• Be sure to mount the front cover before turning the power ON. Do not remove the cover when the inverter power is
ON.
Otherwise, an electric shock could occur.
• Do not operate switches with wet hands.
• Do not touch the terminals of the dynamic braking unit in energized state of the inverter even if the inverter has
stopped.
Doing so could cause electric shock.
• Do not touch the heat sink because it becomes very hot.
Doing so could cause burns.
• The braking with this dynamic braking unit cannot function as mechanical holding.
Injuries could occur.
iv
Содержание BUC S-69D
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