MiCOM range presents P991 Test Block packed with safe and configurable facilities that provides effective monitoring and secondary injection testing to any power system protection scheme when used in conjunction with the P992 multi-finger Test Plug. A single-finger test plug (type P993 is also available which provides a safe and isolated of verification of CT circuits.
The P991 Test Block provides visible automatic line CT shorting just prior to the breakage of relay CT circuit on insertion of a P992 multi-finger Test Plug. P991 Test Plug provides up to three stages of sequential contact operation. An included extraction stop facility prevents from any accidental tripping.