SHENZHEN INVT ELECTRIC CO., LTD. CHV160 Operation Manual
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reactor in the input side, which can also improve the power factor of input side.
4.5.1.4 Noise Filter at Input Side
As inverter in operation can produce interference to nearby equipment through its cables,
noise filter can be used to minimize this interference, as shown in following diagram.
Figure 4-6 Wiring Diagram at Power Supply Side of Main Circuit
4.5.2 Wiring at inverter Side of Main Circuit
4.5.2.1 DC Reactor
CHV series (larger than 15KW) has built-in DC reactor which can improve power factor,
and prevent rectifier damage because of excessively heavy current input to the inverter which
is installed with a large size transformer, and as well prevent rectification circuit damage
caused by sudden variation of power grid voltage or harmonic wave generated by phase
control overloading.
4.5.2.2 Braking Unit and Braking Resistor
• CHV invertor of 15kW and below has braking unit installed inside. In order to release
the feedback energy generated during braking, braking resistor must be installed and
connected at the (+) and PB terminal.
• Braking resistance should have a wire length less than 5M.
• As braking resistor can release energy and increase the temperature, safety protection
and good ventilation should be provided when the braking resistor is being installed.
• CHV inverter of 18.5kW or higher has external braking unit. In order to release the
feedback energy generated during braking, braking units must be installed and connected at
(+) and (-) terminals, and braking resistor must be installed and connected at the (+) and PB
terminals.
• The wire connecting (+), (-) terminals of inverter and (+), (-) terminals of braking unit
should have a length less than 5 meters. The wire for (+), PB terminals of braking unit and
braking resistor should have a length less than 10 meters.
Caution: Be sure of electric polarity of
(+), (-)
, and DO NOT misconnect them; it is
not allowed to directly connect
(+), (-) terminals to braking resistor, otherwise there will be a
risk of inverter damage or fire.
4.5.3 Wiring at Motor side of Main Circuit
4.5.3.1 Output Reactor