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Chapter 4 Wiring
4-1 Main Circuit Wiring
4-1-1 Peripheral Devices Description
(1) AC power supply
Use within the permissible power supply specifications of the
inverter.
(2) Moulded case circuit breaker: (MCCB)
When the power supply voltage is low or the input terminal short
circuit occurs, the breaker can provide protection, during inspection,
maintenance or the inverter is not running, you can cut off the
breaker to separate the inverter from the power supply.
(3)Magnetic contractor(MC)
The contractor can turn on and turn off the power of the inverter to
ensure safety.
(4) AC current reactor
a: Suppress high harmonic to protect the inverter.
b: Improve the power efficiency.
(5) Brake resistor
When the motor is braking, the resistor can avoid DC bus high
voltage of the inverter, and improve the braking ability of the internal
brake unit.
15KW or less the brake unit is built-in, please confirm it.
To select the brake resistor, please refer to section 4, chapter 9:
Appiled Braking resistor speeification.
U
V
W
B
1
B
2
Brake resistor
4-1-2 Main Circuit Wiring Notice
The S900 E series is a highly reliable product, but incorrect
peripheral circuit making or operation / handing method may shorten
the product life or damage the product.