Connection Of A Braking Resistor; Connection Of A Braking Resistor Without Temperature Monitoring - KEB COMBIVERT F5 Instruction Manual

Connection Power Unit

2.6.8 Connection of a braking resistor

Braking resistors dissipate the produced energy of the motor into heat during generatoric ope-
ration. Thus braking resistors can cause very high surface temperatures. During assembly pay
attention to appropriate protection against contact and fire.
The use of a regenerative unit is reasonable for applications which produce a lot of regenerative
energy. Regeneration of excess energy into the mains.
The mains voltage must always be switched off in order to guarantee fire protection in case of a
defective braking transistor.
The frequency inverter remains in operation in spite of switched off power supply in generatoric
operation. An error must be released by external wiring which switches the modulation off in the
inverter if no GTR7 evaluation is installed (GTR7 evaluation only at water-cooled units). This can
occur e.g. at terminals T1/T2 or via digital input. The frequency inverter must be programmed
accordingly in each case.

2.6.8.1 Connection of a braking resistor without temperature monitoring

Picture 2.6.8.1 Intrinsically safe braking resistor without temperature monitoring
Only "intrinsically safe" braking resistors are permissible for operation without temperature moni-
toring.
+PA
R
B
PB
G1
GB - 33