Inovance MD500

3 Installation and Wiring
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42
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3
4. DC bus terminals (+) and (-)
●
DC bus terminals, labeled (+) and (-), are terminals that carry a residual voltage for a period after the drive
has been switched off.
●
To avoid risk of equipment damage or re, when you select an external braking unit for use with an AC drive
of 90 kW and above, DO NOT reverse the poles (+) and (–).
●
Use a cable not exceeding 10 m to connect DC bus terminals to the external MDBUN braking unit. Use
twisted pair wires or close pair wires for this connection.
●
Fire risk! Do not connect the braking resistor directly to the DC bus.
5. Braking Resistors (+) and BR
●
Braking resistor terminals (+) and PB are only for the drive units up to 75 kW that are tted with an internal
braking unit.
●
To avoid risk of equipment damage, use a cable not exceeding 5 m to connect an external braking resistor.
●
To avoid risk of ignition due to overheating of the braking resistor, do not place anything combustible around
the braking resistor.
●
Set F6-15 (Braking use ratio) and F9-08 (Braking unit action initial voltage) correctly according to load after
connecting the braking resistor to the drive of up to 75 kW that is tted with an internal braking unit.
6. AC Drive Outputs UVW
Grounding clamp
for screen/shield
Main circuit cables
Cable support
bracket (optional
)
Use heatsink tube
or insulation tape
to terminate the
screen/shield
Screen/shield
Figure 3-33 Drain wire
The cable support bracket in Figure 3-33 is an optional accessory. You need to buy a bracket applicable to
MD500T160G and previous models. Installation of the bracket is shown below.
(
1) Remove the cover.
(2)
Unscrew two M4*12 screws on
the inlet plate.
1
2
(
3) Install the cable
support bracket to
the drive, and secure
it to the position 3
with three M4*12
screws.
3
(
4) Secure the two
positions with two
M4*12 screws.
4
(
5) Ret the cover.
5
Figure 3-34 Installation of cable support bracket