Relay Test Block and Relay Test Plug

• Nelster Welcon
• Mumbai

Relay Test Block and Relay Test Plug

Relay Test Plug is a multi finger Test Plug when inserted, open circuits the contacts in the Test Block. The Test Plug consists of 28 nos. 4 mm. dia. sockets. Each socket corresponds to the numbered case terminal and is identified by identical number. NWRTP-01 Test Plug when inserted into the Test Block it is securely retained by means of 2 nos. knuurled knobs. Shorting wire links are also provided with the NWRTP - 01 test block. Before inserting the Test Plug NWRTP- 01 into the Test Block NWRTS- 01 it is essential that sockets in NWRTP-01 that corresponds to the current transformer secondary windings are shorted using external shorting wire links. This is to avoid dangerously high voltages. It is also essential to ensure that the ammeter is on the correct range and that it is connected to its test leads, before inserting a test plug to measure current.
Test Plug. Series NWRTP-02 is a single finger Test Plug that can be inserted into individual test positions as shown in figure # 1. NWRTP-02 consists of two contacts which are insulated from one another. Each contact is connected to a lead wire. For polarity identification, one core is red and the other black. Each NWRTP-02 Test Plug is provided with 1.0 mm2-twin flexible cable of 1.5 metre length. It is essential that adequate precautions and safety measures are taken before proceeding with the measurements and testing. When using for voltage measurements, it is possible to access hazardous live voltages via the single finger Test Plug. While monitoring secondary CT current, the leads from the single finger Test Block must never be open Circuited. If done, it can generate lethal level voltages.