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Connection
4.3 Connecting the braking resistor
Note
"Overvoltage" fault
Even when the response threshold is set to a low value, the DC-link voltage can still reach
the maximum voltage value (hardware shutdown threshold), thus triggering the
"Overvoltage" fault. This can occur, for example, in cases where there is too much
regenerative energy for the available braking power.
To prevent the DC-link voltage from exceeding the threshold, the Vdc-max controller must be
enabled (p1240) and the device supply voltage set accordingly (p0210).
4.3
Connecting the braking resistor
Electric shock caused by the connected voltage and residual charge of the DC link
capacitors on the braking module
Contact with live connections on the Braking Module can result in death or serious injury.
• Only connect the Braking Module after the Power Module has been disconnected from
• Only connect the Braking Module after 5 minutes have elapsed. Measure the voltage
Fire caused by ground fault / short-circuit for non-protected connections to the braking
resistor
Inadequate installation of the cables to the braking resistor can result in a ground
fault/short-circuit and place persons at risk as a result of the associated smoke and fire.
• Comply with local installation regulations that enable this fault to be ruled out.
• Protect the cables from mechanical damage.
• In addition, apply one of the following measures:
34
DANGER
the power supply.
before starting work on the DCP and DCN DC-link terminals.
WARNING
– Use cables with double insulation.
– Maintain adequate clearance, e.g. by using spacers.
– Lay the cables in separate cable ducts or conduits.
Braking Module / braking resistor
Operating Instructions, 11/2017, A5E00331454A
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