Protective Relay Wiring Diagram. 4 a protective relay in which the response to the input quantities is primarily a function of the electrical circuit. Distance relay response characteristic when presented on an r x impedance diagram will have an operating area dependent on the manner in which the input quantities are processed and compared.
The purpose of an 86 relay is to serve as an intermediary element between one or more protective relays and one or more control devices both expanding the number of control elements. The first element is emblem that indicate electric element from the circuit. It can be a high impedance type as shown in figure 4 or a biased low impedance type.
This is a unit protection scheme for one winding of the transformer.
An important type of accessory relay especially for legacy electromechanical protective relays is the so called auxiliary or lockout relay designated by the ansiieee number code 86. An important type of accessory relay especially for legacy electromechanical protective relays is the so called auxiliary or lockout relay designated by the ansiieee number code 86. 76 dc overcurrent relay 78 phase angle measuring or out of step relay 79 ac reclosing relay 81 frequency relay 83 automatic selective control or transfer relay 84 operating mechanism 85 carrier or pilot wire receiver relay 86 lockout relay 87 differential protective relay 89 line switch 90 regulating device. Output circuit i.