Short-circuitable terminal board

The 10E 6I-4T-EPI short-circuitable terminal board is an indispensable tool for attaching meters or measuring instruments on threephase lines downstream from voltage and current transformers. It is equipped with 10 clamps that are fully segmented longitudinally (between input and output) with sliding bridges contained in the block and able to integrate a visual signal in case of open circuit. In addition, another three sliding bridges are available for releasing the “cross connection” (between a terminal block and the next one) in order to make a local short-circuit for the current circuits. The terminal board was designed to meet the requirements of the new version of Standard EN 60947-7-x.

The following can be created using the terminal boards:

• Sectioning of measurement instruments
• Insertion of a sample unit, before or after the measurement instrument.
• Derivation using common outlets for all connection clamps
• Step voltage from current input to the crimper through a jumper to be prepared.

During normal operation, the voltage and current inputs are inserted on the lower, respectively, of clamps 1-2-3-N and clamps R-RR, S-SS, T-TT. The instruments are connected to the high part of the terminal
board. The vertical sliding bridges are closed while the ones with a horizontal slide are open.

Inserting control units is done as follows:

• The volt meters are derived through normal 4mm pins on terminals 1-2-3 and N
• The measurement device ammeter R is inserted on the two sockets on terminal R (and similarly for the other phases)
• The corresponding vertical sliding terminals are sectioned.