Liebert GXTTM - Manual (Page 19)

17
AIRFLOW DISSIPATION
OUTPUT
RATING
INPUT CURRENT
Amps max
Cfm m
3
h Watts K Btu/hr VA Watts
Including mains
variation/battery charge
130 221 504 1.7 6000 4200 GXT6000 = 33 amps
270 459 840 2.8 10000 7000 GXT10000= 54 amps
ELECTRICAL INSTALLATION CONSIDERATIONS
This UPS must be installed by competent electrical personnel and wired in
accordance with local/national electrical codes.
The following information is provided for your guidance.
On start-up, the UPS will take a half cycle inrush current of up to 3 times the
rated current. This must be taken into account when selecting the overload
protection device at the input mains supply distribution point. To avoid random
tripping on start-up, we recommend that the input mains supply be protected with
an MCB capable of withstanding this initial inrush. An MCB specified as being
“TYPE 4” (British standard) or “CURVE D” (IEC standard) is suitable for this
purpose.
The mains input supply cable must be connected to the UPS via a wall mounted
double pole circuit breaker, rated to carry the current in table 1 and be capable of
breaking the maximum prospective short circuit current of this branch circuit. The
breaker is to be mounted within two metres of the UPS and be readily accessible
to the operator.
WARNING
This UPS does not incorporate automatic backfeed protection.
A warning label must be fitted to all primary power isolators stating:
ISOLATE UNINTERRUPTIBLE POWER SYSTEM BEFORE WORKING ON
THIS CIRCUIT.
CAUTION
This UPS is fitted with EMC suppression filters. Earth leakage
exceeds 35mA. Transient and steady state earth leakage currents,
which may occur when starting the UPS, should be taken into
account when selecting instantaneous RCCB or RCCD devices. Note
also that the earth leakage currents of the load will be carried by this
RCCB or RCCD.
WARNING
HIGH EARTH LEAKAGE CURRENT- EARTH CONNECTION IS
ESSENTIAL BEFORE CONNECTING THE MAINS SUPPLY. Earth in
accordance with local electrical codes.