Raritan PX3-3000 series, User Manual

Page: 147 / 875

Chapter 5: Introduction to PDU Components
123
PX3-iX7 models:
Circuit Breakers
PX3 models rated over 20A (North American) or 16A (international)
contain overcurrent protectors for outlets, which are usually branch
circuit breakers. These circuit breakers automatically trip (disconnect
power) when the current flowing through the circuit breaker exceeds its
rating.
If a circuit breaker switches off power, the LCD display shows
open
. To
find which circuit breaker is open (trips), select Alerts or OCPs in the
Main Menu. See
Operating the Dot-Matrix LCD Display
(on page 94).
When a circuit breaker trips, power flow ceases to all outlets connected
to it. You must manually reset the circuit breaker so that affected outlets
can resume normal operation.
Depending on the model you purchased, the circuit breaker may use a
button- or handle-reset mechanism.
Resetting the Button-Type Circuit Breaker
Your button-type circuit breakers may look slightly different from the
images shown in this section, but the reset procedure remains the same.
To reset the button-type breakers:
1. Locate the breaker whose ON button is up, indicating that the
breaker has tripped.
2. Examine your PX3 and the connected equipment to remove or
resolve the cause that results in the overload or short circuit. This
step is required, or you cannot proceed with the next step.