Nelster Welcon     D & B Certificate
Nelster Welcon
Nelster Welcon

Test Switch

Relay Test Block

Test Switches, Nelster Welcon Test Switch Manufacturer, Exporter in India

We Nelster Welcon are Manufacturers, Exporters & Leading Suppliers of Test Switch / Test Switches Located in Mumbai, India.

FEATURES :

  • Facilitates easy in-situ, onload testing of relays, metering and control panels without disrupting load circuit.
  • Easy and safe for technicians to isolate protection relays, inject test signals and verify system performance.
  • Rugged Construction
  • Substantially reduces commissioning and routine maintenance
  • Compatible with other popular brands of test plugs.

DESCRIPTION :

We are Manufacturers, Exporters & Leading Suppliers of Test Switch / Test Switches Located in Mumbai, India. The housing is robust, high grade phenolic moulding, capable of long, trouble free performance in varied climatic conditions. It is designed and manufactured for indoor application. The terminals are brass, duly nickel plated. The contacts are spring loaded, silver plated and supported by phosphor bronze strips. Each contact is separated with a SRBP shroud. Screws are 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.



Test switch drawing

INSULATION

  • Conforms to requirements of IS-3231
  • Tested for 2.5 KV. IR Value - 100

MOUNTING

Test block can be projecting or flush mounted

OVERALL DIMENSIONS

  • Height - 100 mm Width - 180 mm Depth - 88 mm
  • Add 25mm for blocks with terminal screws or add 40 mm for blocks with terminal studs.
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