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Rockwell Automation Publication 20Y-TG002C-EN-P - April 2017
77
Precharge Component Section
Chapter 6
The 24V DC power supply (T10) can require replacement if these
measurements continue to be outside of the ±10% tolerance.
For AFE in IP21 Rittal Enclosure
To test the control transformer (T4) and 24V DC power supply (T10) in an
IP21 Rittal enclosure, follow these steps.
1. If present, remove the protective barriers.
Remove AFE Protective Barriers on page 44
.
2. Locate the control transformer (T4) and 24V DC power supply (T10).
The control transformer (T4) is located behind the control frame. The
24V DC power supply (T10) is on a subpanel in front of the
components that are shown in the front view.
3. Use a digital voltmeter to test the control transformer (T4).
a. Measure the primary AC line voltage, which is at the 400…480V AC
or 600…690V AC system voltage.
b. Measure the control transformer (T4) output voltage, which is
approximately 230V AC.
ATTENTION:
Perform these tests only with qualified personnel.
During these tests, the AFE is powered. Take proper precautions to
avoid injury from electric shock.
Front View
(shown with enclosure doors removed)
Control transformer (T4) is
mounted directly behind
control frame assembly.
24V DC Power Supply (T10) is mounted on
this DIN rail that is on a subpanel mounted
behind the control frame assembly.