1/12/2009 11:01 AM | |
Posts: 22 Rating: (7) |
Hi, Load : 200 KW, 341.1 A; 1483 r.p.m motor connected to gearbox for conveyor belt application. Used: 3RW4447-6BC44 with V+C limit. Resistance across L1 & T1 -- 2.2M ohms ; L2 & T2 -- 2.1M ohms; L3 & T3--2.2 Mohms. Soft starter was commissioned and now eachtime switching ON the soft starter in both load coupled & de-coupled , the incomer HT breaker trips within some msecand no reason found for this. In the fault history,ground fault is registered each time. Same motor was started with 3RW44536BC44 and it is starting fine and running continously. All parameters were attached. Internal wirings were also cheked. Found normal. Also this 3RW4447 softstarter was cheked with low rating motor 75 KW and this time HT breaker did not trip, but the motor is not rotating. Any reasons for this failure? Regards, Santhosh. Attachment3RW44 Soft Starter.pdf (571 Downloads) |
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