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T640 Three-Phase Delta and Wye AC Power Supply LEDs

 

Figure 1 shows the LEDs on each three-phase delta AC power supply faceplate. The three-phase wye AC power supply has the same LEDs. The LEDs in Table 1 indicate the status of the power supply. In addition, a power supply failure triggers the red alarm LED on the craft interface.

Figure 1: Delta AC Power Supply LEDs
Delta AC Power Supply LEDs

Table 1: Delta AC Power Supply LEDs

LED

Color

State

Description

AC OK—One per power supply

Green

On steadily

The AC terminal block is receiving voltage.

–

Off

The AC terminal block is not receiving voltage.

DC OK—One per power supply

Blue

On steadily

Power supply is functioning normally.

Blinking

Power supply is starting up, or is not functioning or operating properly, or is not properly installed.

–

Off

The power supply fails or the AC terminal block is not receiving voltage.

OVER TEMP—One per power supply

Yellow

On steadily

Power supply has exceeded recommended temperature.

–

Off

If the DC OK and AC OK are on steadily, this LED indicates that power supply is within the recommended temperature.

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