KEB COMBIVERT F5 Instruction Manual

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

262.8.5.2 Braking resistor with overheat protectionThis circuit offers a direct protection with defective braking transistor (GTR7). The brakingresistor overheats and opens the terminals OH1 and OH2 with defective GTR7. The OHterminals open the holding circuit of the input contactor, so that the input voltage is switchedoff in error case. An error in inverter is released by opening the auxiliary contacts of K3. Re-generative operation is also secured by the internal fault disconnection. The input must beprogrammed and inverted to "external error". Automatic restarting after cooling of the brakingresistor is prevented by the self-holding circuit of K3.Info Terminals T1/T2 / braking resistor• If the PTC evaluation of the motor at terminals T1/T2 is not used, these terminals can beused instead of the programmable input.• The figure below is only an example and must be adapted to the application.T1 T2L1L2L3K32U V WL1 L2 L31436512111413G1R1+PAPBOH1OH2I10VOH1OH2PEDR1HF1FR2+24VS2I1G1K3GNDS1 K3 1112H10VR1DR1OH2OH1OH2OH1K3 1314Figure 14: Braking resistor with overheat protectionK3 Line contactor with auxiliary con-tactsR1 Braking resistor with temperature switchS1 Key for switch on R2 PTC sensor e.g. of the motorS2 Emergency stop circuit braker forswitch offDR1 Mains choke with temperature switch(optional)H1 Tripping control HF1 HF filterG1 Inverter with programmable input I1