Product Profile of Relay Test Blocks And Relay Test Plug

Relay Test Blocks and Relay Test Plug is a multi finger test plug when inserted and open circuits the contacts in the Test Blocks. This Test Plug consists of 28, 4 mm diameter sockets. Each socket corresponds to the numbered case terminal and is identified by identical number. Relay Test Blocks and Relay Test Plug is manufactured by Nelster Welcon which is an ISO 9001: 2008 accredited company

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 NWRTP-01 Test Plug when inserted into the Test Blocks is securely retained by means of two knurled knobs. Shorting wire links are also provided with the NWRTP - 01 test blocks.

NWRTP-01 Test Plug is provided with the following accessories:

• Four 150 mm long cable consisting of 4 mm plugs at both ends

• Four 50 mm long cable consisting of 4 mm plugs at both ends

• Six 4 mm plugs which accepts flexible insulated cable up to 2.5 mm2 for test lead purposes


This Relay Test Blocks and Relay Test Plug can withstand high voltage. For NWRTS-01/NWRTS-02/NWRTS-03/NWRTS-04 the voltage is 2.5 kV rms for 1 minute between all case terminals connected together and case earth terminal. For NWRTP-01/ NWRTP-02 the voltage is 2 kV rms for 1 minute between incoming and outgoing contacts when inserted. It also withstands high current. For NWRTS-01/ NWRTS-02 / NWRTS-03/ NWRTS-04 all contact circuits are rated for 20 A continuous or 300A for 1s, AC or DC. For NWRTP-01/ NWRTP-02 all contacts are rated for 20Acontinuous.

This Relay Test Blocks and Relay Test Plug have a varied temperature range. For storage and transit the temperature range is -25 Degree C to + 70 Degree C and for operating the temperature range is -25 Degree C to – 50 Degree Celsius. It has humidity tested for 56 days at 90% RH & + 40 degree Celsius.