KE RT Series UPS 6-10kVA UL 208-220-230-240Vac User Guide English 20180130 This manual is for qualified personnel only
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To monitor the UPS by the software, connect RS232 or USB cable between the computer and the UPS
respectively.
CAUTION
Typical battery performance data are quoted for an operating temperature between
20°C and 25°C. Operating it above this range will reduce the battery life while
operation below this range will reduce the battery capacity.
CAUTION
An unused battery must be recharged every 3months.
Temporarily connecting the
UPS to a suitable AC supply and activating it for the time required for recharging
the batteries.
The highest altitude that UPS may work normally with a full load is 1500 meters. The load capacity
should be reduced when this UPS is installed at an altitude higher than 1500 meters. Load coefficient
equals max load at altitude divided by nominal power of the UPS.
Altitude (m
）
1500
2000
2500
3000
3500
4000
4500
5000
Load coefficient
100%
95%
90%
85%
80%
75%
70%
65%
4.4
External Protective Devices
For safety, it is necessary to install an external circuit breaker at the input AC supply and another at the
battery. This chapter provides guidelines for authorized personnel and qualified installers - knowledge
of local wiring codes and laws is essential.
External Battery
The UPS and its associated batteries are protected against the effect of over-current through a DC
compatible thermo-magnetic circuit-breaker (or a set of fuses) located close to the battery.
UPS Output
Any external distribution board used for load distribution shall be fitted with protective devices that
protect the UPS from becoming overloaded.
Over-Current
Protection devices shall be installed at the distribution panel of the incoming mains supply.
CAUTION
Select a thermo magnetic circuit-breaker with an IEC 60947-2 trip curve C
(normal) for 125% of the current as listed below.
