4
Installation
Braking resistors
Operating Instructions – MOVIDRIVE
®
modular
104
4.8 Braking resistors
Observe the following points if braking resistors are installed:
• The supply cables to the braking resistors carry a high pulsed DC voltage during
rated operation.
DANGER
Dangerous pulsed DC voltage of up to 970V.
Severe or fatal injuries from electric shock.
To prevent electric shocks:
• Disconnect the application inverter from the supply system and wait 10 minutes
before working on a braking resistor or its supply cables.
• Never operate the application inverter without touch guards and installed closing
covers.
• Braking resistors get very hot during operation.
WARNING
The surfaces of the braking resistors will reach temperatures of up to 250 °C when
the braking resistors are loaded with the nominal power.
Severe burns.
To prevent burns:
• Do not touch any braking resistor.
• Select a suitable installation location for the braking resistors such as the control
cabinet roof.
24748536/EN – 11/2017
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