Table of Contents
Advertisement
The line-to-line unbalanced output capability of the UPS is limited only by the full load per phase current values
for AC output to critical load shown in Table 3-4. The recommended line-to-line load unbalance is 50% or less.
Bypass and output overcurrent protection and bypass and output disconnect switches are to be supplied by
the customer. Table 3-8 lists the recommended rating for output circuit breakers.
Table 3-8. Recommended Output Circuit Breaker Ratings
UPS Model
Eaton 93PM-50-1
Eaton 93PM-50-2 (N+1)
Eaton 93PM-50-1
Eaton 93PM-50-2 (N+1)
Eaton 93PM-50-1
Eaton 93PM-50-2 (N+1)
Eaton 93PM-50-1
Eaton 93PM-50-2 (N+1)
A manual DC disconnect device is provided within the UPS when internal batteries are installed. No manual DC
disconnect device is provided within the UPS when only external batteries are used.
Battery voltage is computed at 2 volts per cell as defined by Article 480 of the NEC. Rated battery current is
computed based on 2 volts per cell.
External DC input overcurrent protection and disconnect switch is to be supplied by the customer. Table 3-9
lists the maximum ratings for continuous-duty rated circuit breakers satisfying the criteria for both.
Recommended disconnect size is based on a maximum full load discharge time less than 3 hours. For longer
discharge times a larger disconnect may be required.
Table 3-9. Recommended DC Input Battery Disconnect Circuit Breaker Ratings (240 Cell)
UPS Model
Eaton 93PM-50-1
Eaton 93PM-50-2 (N+1)
Eaton 93PM-50-1
Eaton 93PM-50-2 (N+1)
Eaton 93PM-50-1
Eaton 93PM-50-2 (N+1)
Eaton 93PM-50-1
Eaton 93PM-50-2 (N+1)
Eaton 93PM UPS (20–50 kW, 480V Four Wire – 50 kW Frame) Installation and Operation Manual P-164000540—Rev 4
UPS Rating
Load Rating
80% Rated
20 kW
100% Rated
80% Rated
30 kW
100% Rated
80% Rated
40 kW
100% Rated
80% Rated
50 kW
100% Rated
UPS Rating
20 kW
100% Rated
30 kW
100% Rated
40 kW
100% Rated
50 kW
100% Rated
UPS Installation Plan and Unpacking
Output Rating
480V
30A
25A
45A
40A
60A
50A
80A
60A
Output Rating
480V
60A
90A
125A
150A
www.eaton.com/powerquality
3-19
Advertisement
Table of Contents
