Relay Test Blocks facilitates easy in-situ, on-load testing of relays, metering and controlling panels without disrupting load circuit. These Relay Test Blocks have robust housing with high grade phenolic moulding capable of long, trouble free performance in varied climatic conditions. Relay Test Blocks are manufactured by Nelster Welcon which is ISO-9001: 2008 accredited.
Nelster Welcon also manufactures relay test blocks, relay test plugs, semaphore indicators, relay test systems & plugs, changeover switches, by pass changeover switches, air break switches, gang operated switches etc. The Relay Test Blocks are designed and manufactured for indoor application. The terminals of this Relay Test Blocks are brass made and duly nickel plated. The contacts are spring loaded, silver plated and supported by phosphor bronze strips. Each contact is separated with a SRBP shroud. These Relay Test Blocks have screws provided at the rear for terminations. Alternatively, studs with nuts and washers could also be provided. Sealing holes on cover studs are provided to prevent unauthorized access. The front cover can be removed for test purpose and replaced, thereafter. This cover is fitted with a silver plated contact finger to close the trip contact, when inserted otherwise the trip contact would remain open. Thus the contact finger on the cover completes the entire circuit. Isolation of the trip circuit is feasible by removing the contact finger fitted to cover thus avoiding unwarranted tripping under test conditions. These Relay Test Blocks have rugged construction and substantially reduces commissioning and routine maintenance. These Relay Test Blocks are also compatible with other popular brands of test plugs. The height and width of the Relay Test Blocks are 100 mm and 180 mm respectively and has depth of 88 mm. These Relay Test Blocks with terminal screws have added 25 mm dimension and Relay Test Blocks with terminal studs has added 25 mm dimension.
