Menu
The ITS is a flush-mount test block engineered to establish safe interfacing between substation devices, such as protection relays, fault recorders, revenue meters, and various components within the power grid’s system side, including voltage and current transformers.
Complementing the ITS test blocks, the STP is a purpose-designed test plug precisely matched to the specific configuration of ITS test blocks. Upon insertion into the corresponding test block, the STP plug effectively isolates the substation devices from the system side equipment. Simultaneously, it facilitates the connection of test equipment, enabling the execution of secondary injection tests with precision and accuracy.
Closed circuit
An ITS test block contains between 7 and 20 modular units (or poles) each allocated to a current, voltage, signal or trip circuit. Each circuit is connected through the block via two silver-plated copper contacts, pressed securely together by two pressure springs to create a highly conductive electrical connection. In this situation, an electrical connection is established between the device side (B) and the system side (A).
Open Circuit
When testing, the corresponding STP test plug is inserted into the test block. In this position, the device and system sides of the test block are isolated from each other. The test plug includes internal shorting bridges for the current circuits. When the test plug is removed from the test block, the internal springs force the contacts back together, returning the circuits to their normally-closed position.
Signal Injection
Banana jacks in the test plug allow the connection of a test set to the device side of the test block and the associated signal injection. Access to the system side is also provided.
For technical documentation and product details, please reach out via email or our contact form.
Click here to connect with our team.
