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Monday Technical Q & A

Mar 09, 2020

Motors Wire Configuration – Star or Delta 

Star or Y Connection

For a motor with terminal markings as W1, U1, V1 and W2, U2, V2 respectively, proceed as follows:

Short-circuit the terminals W2, U2 and V2 and connect the mains to the W1, U1 and V1 to get a star(Y)-connection. See diagram below:


Delta(Δ) Connection

When connecting the end of a phase to the start of another phase you get a delta(Δ)-connection. Connect W2 to U1, U2 to V2, V1 to W1 as shown below:


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