A monitored test block for use in medium and high voltage electrical monitoring circuits such as found in substation facilities that signals via a communication protocol the operational status of potential, current and signal secondary circuits when connected to protection and monitoring devices (or test devices) such as protective relays, fault recorders or any other monitoring and controlling device. The monitored test block includes various safety features to prevent damage to the equipment or harm to a technician. The monitoring circuits may be located in the front for ease of access.