Wye-Delta Contactor - Replacement

Applies to machines built from: 
January, 1998
AD0328 Rev E

WYE-Delta Contactor - Replacement - Introduction

This procedure tells you how to replace the Wye-Delta contactor.
Safety Notes
Caution: When you do maintenance or repair on CNC machines and their components, you must always follow basic safety precautions. This decreases the risk of injury and mechanical damage.

Do these steps before you do work in the machine or in the control cabinet:
  • Set the main circuit breaker to the OFF position.
  • Use an approved lock with an approved safety tag. Always follow lock-out procedures in accordance to local government rules.
  • After turning off the machine, wait at least 5 minutes before working in the control cabinet, to allow power to dissipate. Wait for the voltage indicator LED on the vector drive to go off completely.
  • Always turn off the main air supply when you work on any part of the pneumatic system.
  • Make sure to rest the spindle head on a block of wood when work is done on a vertical axis. This will prevent any unintended movement that could result in the axis falling.
  • Never alter any safety circuits on the machine.
You should not do machine repair or service procedures unless you are qualified and knowledgeable about the processes. Serious damage to the machine components can result in costly repairs. The service technicians at your Haas Factory Outlet (HFO) have the training and experience, and are certified to do these tasks safely and correctly. The repair and service work performed by your HFO is protected with a limited warranty.
danger: Some service procedures can be dangerous or life-threatening. DO NOT attempt a procedure that you do not fully understand. If you have any doubts about doing a procedure contact your Haas Factory Outlet (HFO) and schedule a service visit.

Machine Compatibility

Do this procedure for these machines:
  • All machines.

Parts Included

93-32-5208
QTY: 1
WYE-DELTA, ASSEMBLY 10HP W/BUS BAR (DS)
93-32-5109
QTY: 1
WYE-DELTA, ASSEMBLY 20HP W/BUS BAR (NGC-CONTROL)
93-32-5209
QTY: 1
WYE-DELTA, ASSEMBLY 20HP W/BUS BAR (DS)
93-32-5008
QTY: 1
WYE-DELTA, ASSEMBLY 10HP W/BUS BAR
93-32-5009
QTY: 1
WYE-DELTA, ASSEMBLY 20HP W/BUS BAR
93-32-5002
QTY: 1
WYE-DELTA, ASSEMBLY 10HP W/BUS BAR (SUB-SPINDLE)
93-32-5099
QTY: 1
WYE-DELTA, ASSEMBLY 30HP W/BUS BAR (HIGH TORQUE, XP40)
93-32-5858
QTY: 1
WYE-DELTA, ASSEMBLY 30HP
93-32-5850A
QTY: 1
WYE-DELTA, ASSEMBLY 10HP (PRE I/O-S)
93-32-5851B
QTY: 1
WYE-DELTA, ASSEMBLY 10HP (POST I/O-S)
93-32-5864B
QTY: 1
WYE-DELTA, ASSEMBLY 20HP (SL-30/40, 50T MILLS)

WYE-Delta Contactor - Replacement

Step 1

Push POWER OFF.

Set the main circuit breaker to the OFF position.

Lock the main circuit breaker. Use an approved lock with an approved safety tag. Wait (5) minutes.

Step 2

The Wye‑Delta contactor [1] is in the electrical cabinet.

note:

For Sub-Spindles, SL Lathes and some ST Lathes - The Wye‑Delta contactor is near the spindle motor.

Remove the cover plate [2].

Step 3

Put a label on each cable connected to the Wye‑Delta contactor. Loosen the (6) screws in the holes [1]. Disconnect the (6) cables [2] from the Wye‑Delta contactor. Make sure you disconnect all other cables.

Remove the installed Wye‑Delta contactor. Install the new Wye‑Delta and connect all of the cables.

Make sure all of the cables are installed tightly. Torque the screws to 30 in-lbs (339 N-cm).

Set the main circuit breaker to the ON position.

Push POWER ON.

Be aware: Many service and repair procedures should be done only by authorized personnel. The service technicians at your Haas Factory Outlet (HFO) have the training, experience, and are certified to do these tasks safely and correctly. You should not do machine repair or service procedures unless you are qualified and knowledgeable about the processes.

Danger: Some service procedures can be dangerous or life-threatening. DO NOT attempt a procedure that you do not completely understand. Contact your Haas Factory Outlet (HFO) and schedule a service technician visit if you have any doubts about doing a procedure.

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