Hello all,
In attach you can find standard (recomended) circuit diagram of DC drive with dynamic braking.
Drive is ABB DCS800, 4Q, 3300A, 690VAC
Motor is 700 VDC, 2300A, 225 rpm, separate excitation.
Dynamic breaking will be used in case of drive or network failure so question is:
I DONT plan to put breaker Q2 (in DC circuit) and I dont see any problems but maybe somebody will tell me that I am wrong.
I know what are advantages using DC breaker but in my case it will be to expensive so I am only interesting will there be problems during dynamic braking because in ABB recomandations breaker first disconnect drive from motor armature before close contactor K1. My plan that contactor is switching by NC contact of main AC breaker (Q1).
Thanks in advance,
Milovan Milosevic
In attach you can find standard (recomended) circuit diagram of DC drive with dynamic braking.
Drive is ABB DCS800, 4Q, 3300A, 690VAC
Motor is 700 VDC, 2300A, 225 rpm, separate excitation.
Dynamic breaking will be used in case of drive or network failure so question is:
I DONT plan to put breaker Q2 (in DC circuit) and I dont see any problems but maybe somebody will tell me that I am wrong.
I know what are advantages using DC breaker but in my case it will be to expensive so I am only interesting will there be problems during dynamic braking because in ABB recomandations breaker first disconnect drive from motor armature before close contactor K1. My plan that contactor is switching by NC contact of main AC breaker (Q1).
Thanks in advance,
Milovan Milosevic