FUNCTIONAL DESCRIPTION OF PETROLEUM LABORATORY
SUPPORT SYSTEMS - continued.
POWER PANEL NO. 2. This panel is located in the mechanical room. It receives an input of 208V,
60Hz, 3-phase power from MAIN POWER PANEL via circuit breaker A1CB2. POWER PANEL NO. 2 houses
12 circuit breakers. There are six 20-amp circuit breakers, one of which supplies 110 V, 60Hz, single-phase
power to the water Chiller and four which supply 208V, 60Hz, 3-phase power to the four environmental control
units via control relays located in the explosion proof Distribution Box A13. The other 20-amp circuit breaker
supplies 208V, 60Hz, 3-phase power to the air compressor. One 45-amp circuit breaker in the POWER PANEL
NO. 2 supplies 208V, 60Hz, 3-phase power to the low pressure boiler and its pump. The remaining five circuit
breakers are 15-amp and supply 1lOV, 60Hz, single-phase power to the vacuum pump, the water pump, the
fume and gum bath exhaust blowers, convenience outlets, and the mechanical room lighting
Lighting System. Lighting for the Petroleum Laboratory is provided by 15 fluorescent ceiling light fixtures.
Thirteen are located in the laboratory compartment and two are in the mechanical room. Power for the
laboratory compartment lights is provided by circuit breakers AICB9, A1CB11, and AICB13 located in the MAIN
POWER PANEL. A1CB9 provides phase A power via rear and curbside door interlock switches S1, and rear and
curbside light switches S9 and S12 to lights DS6, DS7, DS8 DS9, and DS10O. A1CBll provides phase B power
via door interlock switches S3 and light switches S10 and 13 to lights DS1, DS2, DS3, DS4 and DS5. AICB13
provides phase C power via door interlock switch S4 and light switches S11 and 14 to lights DS11, DS12, and
DS13. Power for lighting in the mechanical room is phase B power provided by circuit breaker A15CB10 via
door interlock switch S1 and light switch S3 to lights DS14 and DS15.
Blackout Lighting. The center lamp in each of the light fixtures is covered with a blue filter. When
an access door is opened, its door interlock switch is activated. This will turn off all white lights and
leave energized all blue filtered lights. When the access door is closed, the interlock switch is again
activated, returning power to the white lights.
Emergency Lighting. Emergency lighting is provided to the laboratory compartment by light
fixtures DS7 and DS13 and two emergency light ballast boxes A26 and A27. When normal power is
available, phase A power continually charges the battery device in ballast box A26. The device in ballast
box A27 receives its charge from phase C power. When normal power is lost, power from ballast box
A26 will be provided to DS7 via the Forward Emergency Light Switch S17 in the ON position. Power
from ballast box A27 will be provided to DS13 via the Rear Emergency Light Switch S18 in the ON
Purge System (Refer to Figure 1-5 and FO-1). The purge system is used to exhaust potentially dangerous
contaminated air from inside the Petroleum Laboratory. The system consists of the following components:
A1K1 power control relay located in the MAIN POWER PANEL.
A3K1 time delay relay located in explosion proof Distribution Box A3.