WIRE-ELECTRICAL 5P8106 - Caterpillar

Illustration 1 g01946036
UPS with common normal and bypass AC inputs
Illustration 2 g01946038
UPS system with separate normal and bypass AC inputsThe UPS will make an interrupted transfer, if the bypass source is beyond the conditions that are stated below. The transfer will not be more than 100 milliseconds in duration.
Bypass voltage greater than 15%, from the rated output voltage of the UPS.
Bypass frequency greater than 2 Hz from the rated output frequency of the UPS.
Illustration 3 g02162344
When sizing the upstream circuit breakers, the time and current curves for the UPS input and output fuses must be taken into account.
Table 1
Out of Tolerance Values for the UPS Short Circuit Current with the Inverter Coupled and the Bypass AC Source    
Sn     40KVA     50KVA     60KVA     80KVA     100KVA     130KVA    
In     48 A     60 A     72 A     96 A     120 A     156 A    
Limitation     230 A     230 A     230 A     260 A     435 A     435 A    
Table 2
Line Current Values    
Rated power of each UPS system     Continuous input current at 480 v     Input current at 480 v overload = 1.25 In limited to 10 min.     Input current at 480 v overload = 1.5 In limited to 1 min.     Fuse ratings    
40KVA     48 A     60 A     72 A     160 A    
50KVA     60 A     75 A     90 A     160 A    
60KVA     71 A     89 A     107 A     160 A    
80KVA     95 A     119 A     143 A     160 A    
100KVA     119 A     149 A     179 A     315 A    
130KVA     154 A     193 A     234 A     315 A    
Table 3
Normal AC source and Bypass AC source    
    UPS    
Uin     432 to 528 V    
Input voltage range is permitted by the standard.     310 to 528 V    
Fin     45 to 65 Hz    
Illustration 4 g02162345
Power is supplied as a function of the input voltage.
Illustration 5 g02162346
Permissible overloads of the UPS as a function of time
Table 4
General characteristics of the 60 Hz Battery UPS    
Power in kVA     40     50     60     80     100     130    
Normal AC input    
Number of conductors     Three phases and a ground    
Reference voltage at Pn     432 V to 528 V    
Reference frequency     45 Hz to 65 Hz    
THDI     Typically 3 percent at Pn    
Power factor     >0.99    
Bypass AC input    
Number of conductors     Three phases and a ground    
Reference voltage at Pn     432 V to 528 V    
Reference frequency     45 Hz to 65 Hz    
Load Output    
Number of conductors     Three phases    
Set