Relay Test Block And Relay Test Plug
Owing to perfection and quality oriented approach, we have carved niche in the industry by offering an enormous grade array of Relay Test Block. Provided test block is used for monitoring and secondary injection testing of Power system. Our offered block is manufactured with quality assured raw material and the latest manufacturing techniques by our deft team of professionals. To meet needs of our prestigious clients this Relay Test Block is provided at market leading prices within stipulated time frame.
Terminal no. 13 and 14 on NWRTS - 01 and NWRTS - 02 should not be used for CT connections since this will pose a safety hazard. As the related NWRTP-01 test plug contact is shorter than the others, it would result in an open circuit path on the NWRTS-02.Connections to the other related equipments viz. CTs, VTs, DC supplies etc. should be made to odd numbered terminals on the Test Block. This is to ensure that when the Test Plug NWRTP-01 is used, the sockets in the white half of the Test Plug are the isolated Relay circuits and the sockets in the orange half are connected to the potentially live supplies.
NELSTER Relay Test Plugs Series NWRTP-01.
This is a multi finger Test Plug when inserted, open circuits the contacts in the Test Block. The Test Plug consists of 28 nos. 4mm. 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 Plug, it is securely retained by means of 2 nos. knurled knobs.
Shorting wire links are also provided with the NWRTP-01 test blocks.The following accessories are provided with each NWRTP-01 Test Plug. :
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 is connected to its test leads, before inserting a test plug to measure current.
NELSTER Test Plug Series NWRTP-02
This is a single finger Test Plug that can be inserted into individual test positions.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.