v
Wiring
• If no zero-phase current (earth leakage current) detective device such as a ground-fault relay is
installed in the upstream power supply line in order to avoid the entire power supply system's
shutdown undesirable to factory operation, install a residual-current-operated protective device
(RCD)/earth leakage circuit breaker (ELCB) individually to inverters to break the individual inverter
power supply lines only.
Otherwise, a fire could occur.
• When wiring the inverter to the power source, insert a recommended molded case circuit breaker
(MCCB) or residual-current-operated protective device (RCD)/earth leakage circuit breaker (ELCB)
(with overcurrent protection) in the path of each pair of power lines to inverters. Use the
recommended devices within the recommended current capacity.
• Use wires of the specified size.
• Tighten terminals with specified torque.
Otherwise, a fire could occur.
• When there is more than one combination of an inverter and motor, do not use a multi-conductor
cable for the purpose of running the leads together.
• Do not connect a surge absorber to the inverter's output (secondary) circuit.
Doing so could cause a fire.
• Be sure to connect an optional DC reactor (DCR) when the capacity of the power supply
transformer exceeds 500 kVA and is 10 times or more the inverter rated capacity.
Otherwise, a fire could occur.
• Ground the inverter in compliance with the national or local electric code.
• Be sure to ground the inverter's 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.
Otherwise, an electric shock could occur.
• Be sure to perform wiring after installing the inverter unit.
Otherwise, an electric shock or injuries could occur.
• Ensure that the number of input phases and the rated voltage of the product match the number of
phases and the voltage of the AC power supply to which the product is to be connected.
Otherwise, a fire or an accident could occur.
• Do not connect the power supply wires to output terminals (U, V, and W).
• When connecting a DC braking resistor (DBR), never connect it to terminals other than terminals
P(+) and DB.
Doing so could cause fire or an accident.
• In general, the insulation 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 may break down, which would
expose the signal wire to the 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.
Содержание EQ7 Series
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Страница 29: ...2 6 Unit inch mm Refer to Section 2 3 3 9 ...
Страница 94: ...4 25 Table B Motor Parameters Continued Three phase 460 V series EQ7 4_ _ _ C ...
Страница 152: ...4 83 Examples of Sequence Circuits 1 Standard sequence 2 Sequence with an emergency switching function ...