Structure
Static relay consists of following units for operation:
- Auxiliary Voltage Supply:24 V DC supply is required for energizing the circuitry of the static relay. This is obtained by converting 230 V AC to 24 V DC and in some cases station battery voltage of 110 V to 24 V DC.
- Comprator:It compares the actual quantity with the pre-set quantity. For example in an over-current relay it will compare the actual current supplied by CT with the pre-determined set current over which tripping is required.
- Time delay Elements:The required operation time is achieved here by adjusting the values of R and C.
- Logic Circuit:By using the gate circuits conditions of operation of relays are set and relay can only be operated when these conditions are satisfied.
- Output Device:The actual tripping of relay can be achieved by firing the SCR or operating the attracted armature type relay by feeding the signal coming from logic circuit output.
Read more about this topic: Static Relay
Famous quotes containing the word structure:
“The syntactic component of a grammar must specify, for each sentence, a deep structure that determines its semantic interpretation and a surface structure that determines its phonetic interpretation.”
—Noam Chomsky (b. 1928)
“If rightly made, a boat would be a sort of amphibious animal, a creature of two elements, related by one half its structure to some swift and shapely fish, and by the other to some strong-winged and graceful bird.”
—Henry David Thoreau (1817–1862)
“The verbal poetical texture of Shakespeare is the greatest the world has known, and is immensely superior to the structure of his plays as plays. With Shakespeare it is the metaphor that is the thing, not the play.”
—Vladimir Nabokov (1899–1977)