Operating instructions

Safety Precautions 7
1.0 SAFETY PRECAUTIONS
Read this manual thoroughly before working with the static transfer switch.
Be sure to review the warning under Important Safety Instructions on page 1.
Refer to the Handling Considerations on page 9 before attempting to move the unit.
Under typical operation and with the doors closed, only normal safety precautions are necessary.
The area around the static transfer switch should be kept free from puddles of water, excess mois-
ture and debris. The vent grate in the front of the system should not be obstructed in order to
ensure a smooth air flow through the unit for cooling.
ONLY qualified service personnel should perform maintenance on the static transfer switch. When
performing maintenance on any part of the equipment under power, service personnel and test
equipment should be located on rubber mats. The service personnel should wear insulating shoes
for isolation from direct contact with the floor.
Unless all power is removed from the input sources to the unit, one person should never work
alone. A second person should be on hand to assist and summon help, should an accident occur.
Three types of messages are used throughout this manual to stress important text. Carefully read
the information below each Warning, Caution and Note and use professional skills and prudent
care when performing the actions described in that text.
A Warning indicates the presence of a possible serious, life-threatening condition. For example:
A Caution indicates a condition that could seriously damage the equipment and possibly injure per-
sonnel. For example:
A Note emphasizes important text. If the instructions are not properly followed, the equipment
could be damaged or may not properly operate. For example:
!
WARNING
THE UNIT IS SUPPLIED BY MORE THAN ONE POWER SOURCE.
THE UNIT CONTAINS HAZARDOUS VOLTAGES IF ANY OF THE
INPUT SOURCES IS ON, EVEN WHEN THE UNIT IS IN BYPASS.
TO ISOLATE THE UNIT, TURN OFF AND LOCK OUT ALL INPUT
POWER SOURCES.
VERIFY THAT ALL INPUT POWER SOURCES ARE DE-
ENERGIZED AND LOCKED OUT BEFORE MAKING
CONNECTIONS INSIDE UNIT.
LETHAL VOLTAGES EXIST INSIDE THE UNIT DURING
NORMAL OPERATION. ONLY QUALIFIED SERVICE
PERSONNEL SHOULD PERFORM MAINTENANCE ON THE
STATIC SWITCH.
!
CAUTION
RISK OF UNIT DAMAGE
THE INPUT SOURCES TO THE STATIC SWITCH MUST BE
GROUNDED-WYE SOURCES. INPUT SOURCES OTHER THAN
SOLIDLY GROUNDED-WYE SOURCES MAY CAUSE DAMAGE TO
THE SWITCH.
NOTE
Read the entire manual before installing and operating the unit.