NELSTER WELCON is India's pioneer and the largest manufacturers and exporters of Test Terminal Blocks with the widest range to offer. Established in 1978 , we are an ISO-9001 : 2008 certified manufacturing plant offering a range of Test Terminal Blocks, Test Switches, Relay Test Blocks, Relay Test Plugs, Semaphore Indicators, Relay Test Systems & Plugs, Changeover Switches, By Pass Changeover switches, Switch disconnector, Air Break Switches, Gang Operated Switches etc.
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