Abstract: A test system and method for relay connection and testing of a power transmission and distribution grid including a fixed connection block connected to the power transmission and distribution grid, and a mobile plug which connects the fixed connection block or a mobile test block with the relay when the mobile plug is inserted into the fixed connection block or the mobile test block. The mobile test block provides a connection to an external relay testing device when the mobile test plug is inserted into the mobile test block, the fixed connection block provides internal shorting that is activated when the mobile plug is not inserted into the fixed connection block and is deactivated when the mobile plug is inserted into the fixed connection block, and the fixed connection block, mobile plug, and the mobile test block provides an interaction between a power transmission and distribution grid side and a relay side. This allows a quick recovery when relays are damaged in a cyber-attack.

Abstract: A test system and method for relay connection and testing of a power transmission and distribution grid including a fixed connection block connected to the power transmission and distribution grid, and a mobile plug which connects the fixed connection block or a mobile test block with the relay when the mobile plug is inserted into the fixed connection block or the mobile test block. The mobile test block provides a connection to an external relay testing device when the mobile test plug is inserted into the mobile test block, the fixed connection block provides internal shorting that is activated when the mobile plug is not inserted into the fixed connection block and is deactivated when the mobile plug is inserted into the fixed connection block, and the fixed connection block, mobile plug, and the mobile test block provides an interaction between a power transmission and distribution grid side and a relay side. This allows a quick recovery when relays are damaged in a cyber-attack.

Abstract: An interface test device for testing a circuit, the interface test device including a module configured to open and close a medium to high voltage monitoring circuit, the module having at least one pair of contacts biased towards each other that are electrically connected and in line with the medium to high voltage monitoring circuit; at least one pair of insulated jacks, wherein the at least one pair of insulated jacks is connected to the medium to high voltage monitoring circuit before or substantially simultaneously with the medium to high voltage monitoring circuit being opened; at least one disconnect plug that is insertable into the module through at least one parking opening into at least one parking position and insertable into the module through at least one disconnect opening into at least one disconnect position.