16
CONNECTIONS
Powerdrive MD2S Installation guide
4972 en - 2017.08 / d
3.1.2 - Connection terminal characteristics
Functions/
connections
Marking
Type of connection and tightening torque
100T to 150T
180T to 270T
340T to 1400T
270TH to 1500TH
AC power supply
L1, L2, L3,
or R, S, T
M10 screw bolt - 20 Nm
Motor outputs
U , V, W
Earth
PE
M10 bolt - 20 Nm
Braking resistor
(1)
BR1, BR2
M8 bolt - 12 Nm
Do not exceed the indicated maximum tightening torque.
(1) If the braking transistor option is installed.
3 - CONNECTIONS
• All connection work must be performed by
qualified electricians in accordance with the laws in force
in the country where the drive is installed. This includes
grounding to ensure that no directly accessible part of
the drive can be at the AC supply voltage or any other
voltage which may be dangerous.
• The drive must be supplied via an approved circuit-
breaking device so that it can be powered down safely.
• The optional switch supplied with the drive does
not isolate the drive input busbars. It must without
fail be associated with a circuit-breaking device in the
switchboard.
• The drive power supply must be protected against
overloads and short-circuits.
• Check that the voltage and current of the drive, the
motor and the AC supply are compatible.
• The voltages on the connections of the AC supply, the
motor, the braking resistor or the filter can cause fatal
electric shocks. The protective plates supplied with the
drive must always be installed correctly to protect the
user against direct electric shocks.
• Only one permanent magnet motor can be connected
to the drive output. It is advisable to install a circuit-
breaking device between the permanent magnet motor
and the drive output to eliminate the risk of hazardous
voltage feedback when performing maintenance work.
• Also comply with the recommendations in section 7.
3.1 - Power connections
3.1.1 - General
The power connections for the Powerdrive MD2S are detailed
for each model in section 3.1.4.
The Powerdrive MD2S versions with ratings higher than 570T
are obtained by connecting in parallel Powerdrive MD2S
versions with lower ratings.
•
In the -B version (without options), each drive cabinet has
its own U/V/W motor outputs and its own L1/L2/L3 line inputs.
•
In -O versions (with options) each drive cabinet has its
own U/V/W motor outputs; the R/S/T line inputs are contained
in the option cabinet.
• The cables for each of the motor U/V/W phases
must be distributed evenly over the U/V/W connection
plates in each drive cabinet.
•
In -B versions, the incoming line cables must be
distributed evenly over the L1/L2/L3 connection plates in
each drive cabinet.
