The reason being that twelve lead motors can be used in almost any situation. Speed: Single Phase: 3 Typical Voltage: Dual 230/460 Winding: "Y" Start: "Delta" Run Special Feature: 12 Leads To put it simple, you are applying a lower voltage (wye or "Y") across the motor to start … The motor … wye start delta run motor wiring diagram - What is a Wiring Diagram? This is why the motor stopped when it switched to delta run.) Any soft starter will do, especially for a centrifugal pump, but I would steer clear of the super cheap ones that only have SCRs on two of the three phases (the third pole is a piece of bus bar internally), they are not good for the motor and run a risk of frying it. I mean, you couldn't just use a 12 lead motor and make it Y/Delta. Wye Start Delta Run. In this lesson we'll examine Y start-Delta run reduced voltage starters designed to limit inrush current and reduce mechanical stresses to the driven load. 12 lead motors are becoming more available and some motor manufacturers are selling 12 lead exclusively. the motor is using for induced draft fan. Units rated for single voltage may have 12 leads and be suitable for wye-delta or part-winding starts. In US 12 lead motor with wye delta starting is sparingly used unlike in Europe. If leads are numbered 1 to 12, the motor is typically rated for two voltages and could be used with a wye-delta starter at either voltage, or a part-winding starter for low voltage only. They are the same cost, they both use the same hardware, 3 starters, to accomplish the wye/delta, or double delta, to provide soft start. Then we would need a 'special'(higher voltage) motor for Y Start/Delta Run. The 12-lead motor can be connected to four different voltages: wye-delta, one-delta start, two-wye run, and variations of part-winding start methods. Soft start's, Drives, wye/delta starting,ect.... Wye/Delta starting is the most common. Figure 5.57 is the two-delta connection, which has the lowest voltage rating. Wye-Delta starter was the wrong thing all along for that motor, was never going to work. The name plate says for high voltage: L1-T1 L2-T2 L3-T3 T4-T7 T5-T8 T6-T9 T10-T11-T12 and it mentions nothing for a delta connection. Wye/Delta Motor starter. ... For example, a 20-amp circuit must have 12-gauge wiring, which can be rated for 20 amps. MOTOR WIRING DIAGRAM 466703 12 Lead, Single Voltage, Wye Start – Delta Run or Part Winding Start Revised: 1/8/2014 NIDEC MOTOR CORPORATION 1. "Y" Start: Delta Run (12 Leads) name for this kind of "soft" motor starting is Wye-Delta altho Star-Delta is common. now drive is in trouble we tried to switching the motor with star delta starter but it is tripping continuously. ... 7/12/2013 01:03:39 am. Name: 3 phase motor wiring diagram 12 leads – Typical Connection Diagrams Three Phase Motors "Y" Start Delta Run 12 Leads U S MOTORS File Type: JPG Source: pinterest.com Wye Start Delta Run Motor Wiring Diagram Sample. The application where star connected 12 lead motor … This method is actually reduced voltage but is accomplished by changing the motor phase connections such that a winding that is designed to run with phase voltage equal to line voltage on delta connection is wye connected for starting … we closed all the dampers and started the motor with STAR/DELTA starter by setting the star time as 9SEC anf relay set point 390A and PAUSE TIME 90mili SEC. The application is UL listed motor in fire pumps. 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