Alpha Power Supply Module Test: High Voltage
To make an Alpha Power Supply Module (regular voltage) show “_ _” on the display and 600 volts DC output across the buss:
Step 1
Kill power, let the charge lights go out, and then check for a DIRECT SHORT between the top and bottom buss bars.
Step 2
If you have a DIRECT SHORT, disconnect modules until the short goes away.
Step 3
If you do not have a DIRECT SHORT, follow the steps below.
Step 4
Be sure to measure the leg-to-leg AND leg-to-ground voltage into the power supply module.
If you do not have a DIRECT SHORT:
Step 1
Supply 3-phase input into L1, L2, and L3 bottom of power supply (400-480V AC leg-to-leg & 200-260V AC leg-to-ground).
Step 2
Supply 200 volts input into CX1A connector.
Step 3
Jumper out the top and bottom pins of the three pins on the CX3/MCC cable coming into the PSM.
Step 4
Jumper out the top two pins of the three pins on the CX4/ESP E-Stop connector on the PSM.
Step 5
Have all screws on the DC buss installed and tight.
With these things done you should have “_ _” on the display and 600 volts dc across the buss. If you do not, then replace power supply.
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