Klockner Moeller Electric Parts from KlocknerMoeller.net
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1-877-595-9616
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Largest Authorized Stocking USA Distributor
Representing
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All about Motors
Multi speed switch for three-phase motors |
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| Tapped winding, non-reversing, 2 speeds |
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Multi-speed contactors UPSDAINL
Star-delta starting at low speed
Fuseless
Without overload relay
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Rating of switchgear
Q1, Q17 = I1
(low speed)
Q2, Q21 = I2
(high speed)
Q19, Q23 = 0,5 × I2
With fuses and overload relay
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Rating of switchgear
F2, Q17 = I1
(low speed)
F21, Q21 = I2
(high speed)
Q19, Q23 = 0,5 × I2
F1 = I2
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Method of operation
Actuation of pushbutton I energizes the coil of star contactor Q23, and its normally open contact 13–14 energizes the coil of contactor Q17. The
motor runs in star at low speed. The contactors are maintained via auxiliary contact Q17/13–14. At the same time, timing relay K3 cuts in.
When the set time has elapsed, K3/15–16 opens the circuit of Q23. Q23 drops out, the coil of delta contactor Q19 is energized and maintains
itself via Q19/13–14. The timing relay is de-energized via normally closed contact Q19/32–31.
The motor runs in delta at low speed. Actuation of pushbutton II de-energizes the coil of Q17 and via Q17/22–21 energizes the coil of
Q21. This state is maintained by Q21/43–44: The coil of star contactor Q23 is re-energized by normally open contact Q21/14–13. The motor runs
at high speed.
Pushbutton 0 (= Stop) effects disconnection.
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