Precautions On Wiring Main Circuit - Panasonic VF200 Instruction Manual

3.3.2 Precautions on Wiring Main Circuit

■ Precautions on Wiring
To avoid mistakes in wiring and operation, be sure to observe the following
guides.(Failure to do so may damage the unit.)
·Always connect the power source to input terminals (R/L1, S/L2, T/L3), and
connect the motor to output terminals (U,V,W).
·Use round crimp terminals with sleeve for power source and motor
connections. Select crimp terminals according to wire sizes and screw sizes.
·After wiring main circuit, confirm the tightening condition of terminals.
·Main circuit must be wired prior to control circuit. Otherwise, re-tightening
operation is not possible after control circuit wiring is completed.
·When connecting directly to a transformer of large capacity (500 kVA or more),
always install an AC reactor on the input side of the inverter.
Note 1: It is recommended to use teflon insulated wire (600 V, Class 2,
allowable operating temperature up to 75 °C) for main circuit wiring.
Note 2: Use wires with larger diameter if the wiring distance is long.
Note 3: If the overcurrent trip of the circuit breaker is magnetic type, the
device could become overheated due to higher harmonics. Use a
load rate of 50% or lower in this case.
Note 4: If a circuit breaker for motor protection is in use, remove it.
Note 5: Always connect protective devices against overcurrent, short-circuit
and current leakage on the input side.
■ Precautions on Using Regenerative Brakes
·When using regenerative brakes, set the parameter P019 to "0". Since the
factory setting is "1", the brakes will not be activated.
·Specifications for regenerative brakes are shown as follows. Carefully
consider the operation conditions before using them. Note that the inverter
could be damaged if a brake outside specifications is used.
Max. duty factor (%ED): 5% ·Max. operating time: 5 s ·Max. torque: 100%
3. Wiring