Chapter 4 Wiring of Inverter
ET/EP/EH Series Intelligent Flexible Driver Manual
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Use the inverter-dedicated noise wave filter.
4.3.4.4 External braking resistor terminals (B1, B2)
All power models of intelligent flexible drivers have the built-in braking units. In order to
release the energy fed back during motor braking, an external braking resistor must be
connected. The specifications of braking resistor are shown in Table 2-2 400 V Class
Resistor Configuration.
Install the braking resistor between terminal B1 and terminal B2.
To make the braking resistor work normally, it requires fully considering the radiating
conditions of the braking resistor to ensure its good ventilation.
The wiring length of the braking resistor shall not be greater than 5 meters.
For the connection of the external braking resistor, see Figure 4-11.
Figure 4-11 Diagram of external braking resistor connection
4.3.4.5 External braking unit terminals (B+, B-)
When an external braking unit needs to be connected, the ○＋ and ○－ terminals of the
braking unit correspond to the inverter (B+, B -) terminals one by one, and the BR1 and
BR2 terminals of the braking unit is connected to the breaking resistor.
The wiring length between the inverter (B+, B -) end and the braking unit○＋, ○－end shall
be less than 5 m, and the wiring length between the braking unit BR1, BR2 and the
braking resistor shall be less than 10 m.
The polarities of B+ and B - shall not be reversed; the B+ and B - terminals
are not allowed to be directly connected to the braking resistor, otherwise it may damage the inverter
or cause the risk of fire.
4.3.4.6 Connection of energy feedback unit (DC+, DC -)
The company's RG series energy feedback unit can feed the electricity generated by the motor in the
regenerative braking state back to the grid. RG series energy feedback unit adopts IGBT as rectifier
to feed back, compared with the traditional three-phase reverse parallel bridge rectifier unit, the
harmonic distortion component fed back to the grid is less than 5% of the fundamental wave, and the
pollution to the grid is very limited.
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