WEBVTT

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A three-phase power contactor with L1, L2, L3

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At the bottom T1 to 3, the outputs (reverse connection allowed if specified in France)

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Finally an NO contact used for the control (often self-maintaining)

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A1 A2 the control terminals: the coil here 24 V DC. The + in A1. A2 is replicated at the bottom right

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Here is a block of 2 contactors, older but practical in the needs of 2 contactors (star / delta, reversal of direction ...)

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A more modern contactor in addition to an NC / NC connected to the bulb currently on. Below it is connected to the NO. The contactor is at rest.

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We have just verified that the circuits: power and control are totally electrically isolated!

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I turned the switch upside down! It includes a protection against the overvoltage of the coils ...

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That is restored!

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The switching of the illumination and therefore of the active output is observed when the contactor

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The difference with most relays is that I have 2 circuits to make an inverter available in 1 single RT on relay ...

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This contactor offers their control contacts here at the top!

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On the new contactors a double protection against the manual support (dangerous because slow and uncertain): obturation and hard point to close frankly ...