Appendices 81
will trip causing outlets 6 through 10 to shutdown. This does not affect outlets 1 through 5, which are controlled by the second circuit breaker.
As the PM10i-32A has the controller powered from the line side of one of the circuit breakers, the whole unit will be inoperative only if both circuit breakers trip, but the controller will still function.
When either circuit breaker trips, only the power outlets of that segment will be affected, and half of the outlets remain operative.
PM20-L30A IPDU
The PM20-L30A IPDU has two 15-amp circuit breakers. The first circuit breaker controls outlets 11 through 20; the second controls outlets 1 through 10 as well as the power supply to the logic board. In the event that the total current flow to outlets 11 through 20 exceeds 15 amps due to equipment connected to these outlets, then the first circuit breaker will trip causing outlets 11 through 20 to shutdown. This does not affect outlets 1 through 10 which is controlled by the second circuit breaker.
If, however, current overload causes the second circuit breaker to trip, then the entire power unit shuts down because the power supply is also tied to the second circuit breaker.
Refer to Table C.1, “Circuit Breaker Trip Time,” on page 83 to determine the time it takes for the circuit breaker to trip based on the amount of current overload.
Figure C.3: PM20-L30A IPDU Circuit Breakers
PM20i-L30A IPDU
The PM20i-L30A IPDU has two 15-amp circuit breakers. The first circuit breaker controls outlets 11 through 20; the second controls outlets 1 through 10. In the event that the total current flow to outlets 11 through 20 exceeds 15 amps due to equipment connected to these outlets, then the first circuit breaker will trip causing outlets 11 through 20 to shutdown. This does not affect outlets 1 through 10 which are controlled by the second circuit breaker.
As the PM20i-L30A IPDU has the controller (see Control Board in the figure below) powered from the line side of one of the circuit breakers, the whole unit will become inoperative only when both circuit breakers trip; however, the controller will remain functioning.
