User guide

Chapter 4: Using the PDU
33
 AP: This indicates the selected inlet's active power.
 UL: This represents the selected inlet or outlet's Unbalanced Load,
which is only available for a three-phase PDU.
During the firmware upgrade, some Dominion PX models may show bx in
the two-digit row to indicate the relay or meter board numbered x is being
updated.
Automatic Mode
When left alone, the LED display cycles through the line readings and
circuit breaker readings at intervals of 10 seconds, as available for your
Dominion PX. This is the Automatic Mode.
Manual Mode
You can press the Up or Down button to enter the Manual Mode so that a
particular line or circuit breaker can be selected to show specific readings.
To operate the LED display:
1. Press the Up or Down button until the desired line or circuit breaker
number is selected in the two-digit row. Or you can press either button
to select the inlet's active power, which is shown as AP.
 Pressing the
(UP) button moves up one selection.
 Pressing the
(DOWN) button moves down one selection.
2. Current of the selected component is shown in the three-digit row.
Simultaneously the CURRENT(A) LED is lit. See LEDs for
Measurement Units (on page 32).
3. Whe
n selecting a line, you can press the Up and Down buttons
simultaneously to switch between voltage, active power and current
readings.
 The voltage appears in this format: XXX (V). It is displayed for
about five seconds, after which the current reading re-appears.
When the voltage is displayed, the VOLTAGE(V) LED is lit.
 The active power appears in one of the formats: X.XX, XX.X, and
XXX (kW). It is displayed for about five seconds, after which the
current reading re-appears. When the active power is displayed,
the POWER(kW) LED is lit.
4. When selecting the inlet (AP), it displays the active power reading.
 The active power appears in one of the formats: X.XX, XX.X, and
XXX (kW). When the active power is displayed, the POWER(kW)
LED is lit.
Note: The LED display returns to the Automatic Mode after 20 seconds
elapse since the last time any button was pressed.