Safety
Symbols Used In This Manual
The following symbols appear in this User's Manual:
CAUTION/DANGER - Caution indicates risk of bodily harm. Danger indicates that a risk of elec- trical shock is present and the associated proce- dures should be followed carefully.
“STAND BY MODE” - The system enable switch, and the input circuit breaker use the “stand by” mode. When either of these are switched to“stand by,” the Power Array is disconnected from utility input voltage. In this mode, the system appears to be off, although the utility power is still connected to the system. For this reason, the standby mode is unsafe for servicing the system. Always follow the five step Total Power Off procedure before servic- ing the Power Array. (See procedure at right.)
“OFF POSITION” - The maintenance bypass switch is the only switch that can be placed in the “off” position. When switched to the “off ” posi- tion, the Power Array functions normally, receiv- ing power from the utility source, and delivering conditioned power to the load equipment.
“ON POSITION” - All three switches (The sys- tem enable switch, the maintenance bypass switch and the input circuit breaker) can be placed in the “on” position. See the description for each of these switches in chapter 1.
SAFETY EARTH GROUND - Indicates the pri- mary safety ground.
IMPORTANT SAFETY INSTRUCTIONS
νSAVE THESE INSTRUCTIONS - This manual contains important instructions that should be followed during installation and maintenance of the Power Array, and for installation or replacement of the battery and power mod- ules.
CONSERVER CES INSTRUCTIONS. CETTE NOTICE CONTIENT DES INSTUCTIONS IMPORTANTES CONCERNANT LA SÉCURITÉ.
νConnection to the branch circuit (mains) must be per- formed by a licensed electician.
νInstallation of the power and battery modules can be per- formed by any individual with no previous technical ex- perience.
νOperation of the equipment can be performed by any individual with no previous technical experience.
νThe protective earth conductor for the SymmetraTM car- ries the leakage current from the load devices (computer equipment). Therefore, the size of the conductor must be at least as large as the wire required by IEC 950. IEC 950 states the following nominal
-2.5 mm2 for rated current between 17 & 25 A
-6 mm2 for rated current between 33 & 40 A
-10 mm2 for rated current between 41 & 63 A
-16 mm2 for rated current between 64 & 80 A
νFIVE STEP TOTAL POWER OFF PROCEDURE
To remove all power from the Power Array (Total Power Off), the following series of events must occur in the or- der listed:
1. Set system enable switch to the “stand by” position.
2. Set input circuit breaker to the “stand by” position.
3. Remove all battery modules from the Power Array.
4. Disconnect external battery cabinet (if present).
5. Disconnect the mains/branch circuit breaker.