DOWEL 7S4326 - Caterpillar

Normal AC Source
Table 1
Normal and Bypass AC Input    
Number of conductors     Three phases    
Rated voltage and tolerance     480 V +/- 10% (adjustable to +/-15%)    
Rated frequency and tolerance     60 Hz +/- 10%    The correct circuit breaker must be selected based on the following criteria.
The breaking capacity for the circuit breaker.
The expected short-circuit current at the installation site.
The need to protect the static-switch semiconductors, that is, the maximum permissible current for the static-switch semiconductors must be considered.
The selection must include the distinct needs for the UPS output fuses and protection devices on the load side of the UPS.
Table 2
Electrical Parameters for the Normal AC Source    
Rated UPS output in kVA     Normal AC source current    
Rated current (In) for unit For 25% overload (3)     For 50% overload (3)    
With battery at start of charge cycle (1) Without battery (2)    
150     245     236     295     354    
180     295     283     354     425    
225     332     320     400     480    
( 3 ) The normal AC source currents given for an overload of 25% or 50% are maximum values. The currents have been determined for a battery with a float charging voltage and a load power factor of 0.9. When choosing the circuit breaker rating, use the "rated current" column. Check that the circuit