KR series（6-10kVA）user’s manual
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Altitude: meet GB/T 7260.3-2003;
Verticality: no shock with orthogonal rake not exceeding 5;
Pollution rank: Class Ⅱ;
The UPS should be installed in the environment where exists enough ventilation, coolness, not
too high temperature and without dust. The recommended work temperature is 20~25℃ and the
humidity should be controlled around 50％.
Note: Not allowed to install at environment with dust of metal conduction.
4.3.1.2 Power supply requirements
1．Grounding preparation.
Grounding terminals are ready, and voltage between Zero line and ground line is less than 5 V.
2．AC input voltage and load capacity of incoming line of mains supply
Before installing UPS, please ensure the AC input voltage and load capacity of incoming line of mains
supply meet the requirements of devices, to take the decreased in current carrying capacity by aging of wire
into account.
3．Equip Breaker protection for AC input
Install breaker or power distribution boxes that match with the power of mainframe before the input cable of
mainframe to isolate mainframe and mains supply. Taking into account the impulse current of power on
moment, the breaker be selected must be 1.5~2 Times of Maximum current of Mainframe, and breaker
should not with leakage protection to avoid improper operation of breaker. Selection of breaker please see
details at table 4.3 -1：
Table 4.3 -1 Recommended value of breaker
4． Selection of Input and output cable
Selection of Conductor sectional for the input&output cables of UPS and battery cable, please refer to
corresponding recommended value listed on table 4.3-2.
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