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 mains (utility) input voltage. In this mode, the system appears to be off, although the mains (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 servicing 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 mains (utility) power, and delivering condi- tioned 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
nSAVE THIS USER MANUAL - This manual contains im- portant instructions that should be followed during in- stallation 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.
nConnection to the branch circuit (mains utility power source) must be performed by a licensed electician.
nInstallation of the power and battery modules can be per- formed by any individual with no previous technical ex- perience.
nOperation of the SymmetraTM can be performed by any individual with no previous technical experience.
nThe 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
nFIVE STEP TOTAL POWER OFF PROCEDURE
To remove all power from the Power Array (Total Power Off), the following events must occur in the order 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 XR external battery cabinet (if present).
5. Disconnect the mains/branch circuit breaker.