TDJ1 two-in-one roof-mounted equipment
   Such product is TDVC-660/25G vacuum circuit breaker, which is integrated with THJB-1000/25G high-voltage earthing switch on a base-plate, thus, installation space on roof will be efficiently saved, equipment lay-out on roof will be optimized, electric field distribution will be improved; meanwhile, ingenious combination of these two products will enable electrical performance to highly improve and be applicable to outdoor high-speed EMUs and various newly manufactured locomotive and reconstructed locomotive.
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