26
NOTES:
The neutral conductor should be sized for 1,5 times the output/bypass phase current. The Earth
conductor should be sized at 2 times the output/bypass conductor (this is dependent on the fault
rating, cable lengths, type of protection etc.) These recommendations are for guideline purposes only
and are superceded by local regulations and codes of practice.
5.7.5 Safety Earth
The safety earth cable must be connected to the earth BUS BAR and bonded to each cabinets in the system
and also the earthing and neutral bonding arrangements must be in accordance with the local laws.
ATTENTION!!!
Failure to follow adequate earthing procedures can result in electric shock hazard to
personnel, or the risk of fire.
5.7.6 Cable Connections
ATTENTION!!!
All the cable connections of the ups must be done by the authorized service personnel.
Once the equipment has been finally positioned and secured, connect the power cables as described in the
following procedure:
1.
Verify that the UPS’s switches are totally at “0” position.
2.
Connect the A.C. input supply cables between the mains distribution panel to the B terminals as in Fig. 5-2.
ATTENTION!!!
ENSURE CORRECT PHASE SEQUENCE
If there is a phase sequence fault, A21/A39 “ROTATE PHASE” message appears on
the front panel and the UPS can’t work.
3.
Connect the UPS output cables from the output terminals to the load distribution panel.
4.
Make the connection of the battery groups. Please look at the 5.4.3 Battery Installation item for it.
ATTENTION!!!
Remove the battery fuse before making the connection of the battery circuit
Breaker during the battery installation. (Turn off into “0” (OFF) position)
5.
Connect the copper earth bus, which is under the safety earth and the cables power connection.
Note:
The earth and the neutral connections must be in accordance to the local Rules.
6.
If the REMOTE STOP option is going to be used, you should connect the remote stop button (normally
open), to the pins 4 and 5 of the remote stop connector (CN3) on the PCB ITF3.
Summary of Contents for T-3250
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