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Picture in left says what is main figures in a relay. Relays are classified by the arrangement of their contacts. The two terminals are either connected together or disconnected from each other. A pair of contacts is said to be "closed" when current can flow from one to the other and the terms "make" for closure of contacts is "closed". When the contacts are separated by air gap, they are said to be "open",and no current can flow between them at normal voltages. The terms of "break" is"open". |
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POSITION | CONTACTS | Qty |
LEFT SIDE CONTACTS | MAKE(closed) | 1 |
BREAKE(open) | 3 | |
RIGHT SIDE CONTACTS | MAKE(closed) | 0 |
BREAKE(open) | 4 |
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