Test Terminal Blocks

For each current circuits there are three terminal inserts each with entry at the top and back of the block for back connected test terminal blocks and entry from the top & bottom. A link bar, insulated from the terminal insert, is provided along the axis of the block, across each set of three inserts by means of three cheese headed screws in the A link bar for screw type test terminal blocks and two hooks shorting/ linking the three current terminals in case of links type blocks. The terminal inserts can be connected or disconnected as may be necessary for testing.

It is therefore possible to connect current coil of testing instruments in series with the meter without removing the connecting wires. Thus operating to testing conditions can be achieved without interrupting the current and voltage circuits. The voltage terminals are so designed that incoming and outgoing leads can be connected or disconnected by means of a moveable link. Large entries are provided in the bakelite case so that two or more wires can be connected if so required. The links are connected to the terminals by means of a screw.

When several meters are tested, their current coils should be connected in series. If meters are to be tested individually, separated Test Terminal Blocks are required for each meter.

RANGE

est Terminal Blocks available in 3 phase, 3 wire or 3 phase 4 wire front or back connected up to 50 Amps. Both link and screw type arrangements for CT shorting are manufactured by us. Test Terminal Blocks are provided with covers made of phenolic moulding powder for safety.

APPLICATIONS

The Test Terminal Blocks connected with ammeters, KWH meters, Maximum demand indicators, Trivector Meter etc. enables site testing to be made without disconnecting the existing wiring leading to the consumers or to the meters. Any connections like insertion of current or voltage coils of testing instruments or shorting of the CT secondary winding can be easily & quickly made. The Test Terminal Blocks are therefore principally intended for use in connection with stationary hih voltage measuring unit. With slight modifications they can also be used for testing relays and other testing equipment.

TECHNIAL DATA