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DESIGNATIONS FOR DIAGRAMS:
PT - Motor overcurrent protection
K - Contactor
PZ - Control button ON
PW - Control button OFF
B, BS - Fuses
WS - Service switch
Fig.1 Example electric connnection diagram of WD16-TD, WD20-TD, WD25-TD; WD31,5-TD fans
with two speed three phase motors (Y/Y connection).
DESIGNATIONS FOR DIAGRAMS:
PT - Motor overcurrent protection
K - Contactor
PZ - Control button ON
PW - Control button OFF
B, BS - Fuses
WS - Service switch
Fig. 2 Example electric connnection diagram of WD-40-T with single speed three phase motors (only
star connection).