KEB COMBIVERT F5 Instruction Manual

Also see for COMBIVERT F5: INSTALLATION GUIDELINE Installation manual Instruction manual Instruction manual Installation manual

252.8.5 Connection of a braking resistorWarning Very high surface temperaturesBraking resistors dissipate the produced energy of the motor into heat during generatoricoperation. Thus braking resistors can cause very high surface temperatures. During assem-bly pay attention to appropriate protection against contact and fire.Info Regenerative unitThe use of a regenerative unit is reasonable for applications which produce a lot of regener-ative energy. Regeneration of excess energy into the mains.Attention Technical information• The mains voltage must always be switched off in order to guarantee fire protection incase of a defective braking transistor.•The frequency inverter remains in operation in spite of switched off power supply in gen-eratoric operation. An error must be released by external wiring which switches the mod-ulation off in the inverter. This can occur e.g. at terminals T1/T2 or via digital input. Thefrequency inverter must be programmed accordingly in each case.•No braking resistor may be connected for control type "Basic" at an input rated voltage of480 Vac. The response threshold of the braking transistsor (Pn.69) for all other controls with-out safety technology (A, E, G, H, M) must be adjusted at least to 770 Vdc (see annex D).2.8.5.1 Braking resistor without temperature monitoringIntrinsically safe braking resistor without temperature monitoring+PAPBR B G1Figure 13: Braking resistor without temperature monitoringAttention Only "intrinsically safe" braking resistors are permissible for operationwithout temperature monitoring.