5.1.3.2  AC Power

The AC power is really three different systems.

1.

AC power for the air conditioning system, fans, and the outer perimeter of the hall (i.e. the outlets). This power is supplied from a transformer which is isolated from the power used for instrumentation.

2.

AC power (1800 Amps) for power supplies and instrumentation on the spectrometer. This power is distributed to various panels (all marked), and supplies power for all pumps etc.

3.

AC clean power

• fed from separate transformer which is interlocked to the VESDA systems.
• only supplies power to detectors in the huts of HRS EA and HRS HA.
• also supplies power to racks near power supplies (except racks 1-2).

For specifics of the AC power, see the attached of electrical drawings (AC Power Distribution 65740-D-42000-00 Sheets 1-3, Utility Power Panels 65740-D-42000-01 Sheet 1 of 1, Clean Power Distribution 65740-D-42001-00 Sheet 1 of 1, Clean Power Panels 65740-D-42001-01 Sheet 1 of 1). There are circuit breakers located in several places around Hall A. If you encounter equipment that seems unpowered it is always worth checking the breakers. All outlets in hall A have a label that indicates which breaker box feeds it. Boxes are located on the east side of the ahll behind the balcony. Racks in the room adjacent to the truck ramp, along the side of the HRS EA/HA spectrometers, upstairs in the counting house.

The fire safety (VESDA) system, may also be responsible for loss of AC clean power. For more information see the section on fire in this manual.

Aside from the resetting of circuit breakers you should not attempt to solve any other problems associated with AC power distribution without consulting responsible personnel.

Anyone working on AC power in Hall A must be familiar with the EH&S manual and must contact one of the responsible personnel listed in Chapter ?? of this document.