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MBM INSTALLATION PLAN AND UNPACKING
Eaton 9395 Maintenance Bypass Module Installation and Operation Manual
S
164201719 Rev 3
www.eaton.com/powerquality
3-12
External MBM rectifier and bypass input overcurrent protection is not provided by this
product, but is required by codes. Refer to Table 3‐4 through Table 3‐7 on pages 3-6
through 3-9 for wiring requirements.
Table 3‐10 lists the recommended maximum rating for rectifier input circuit breakers
and Table 3‐11 lists the maximum recommended rating for bypass input circuit
breakers.
Table 3‐10. Recommended Maximum MBM Rectifier Input Circuit Breaker Ratings
MBM Model
UPS Rating
Input Rating
Load Rating
480V
Eaton 9395 275 kVA MBM
225 kVA
80% Rated
400A
100% Rated
350A
275 kVA
80% Rated
500A
100% Rated
400A
Eaton 9395 550 kVA MBM
450 kVA
80% Rated
800A
100% Rated
600A
500 kVA
80% Rated
1000A
100% Rated
700A
550 kVA
80% Rated
1000A
100% Rated
800A
C
A
U
T
I
O
N
To reduce the risk of fire, connect only to a circuit provided with maximum input circuit breaker current
ratings from Table 3‐10 in accordance with the National Electrical Code, ANSI/NFPA 70.
Table 3‐11 lists the maximum rating for bypass input circuit breakers. When wiring a single‐feed
UPS input, the rating requirements for the bypass input circuit breakers are superceded by the ratings listed
in Table 3‐10.
Table 3‐11. Recommended Maximum MBM Bypass Input Circuit Breaker Ratings
MBM Model
UPS Rating
Input Rating
Load Rating
480V
Eaton 9395 275 kVA MBM
225 kVA
80% Rated
350A
100% Rated
300A
275 kVA
80% Rated
450A
100% Rated
350A
Eaton 9395 550 kVA MBM
450 kVA
80% Rated
700A
100% Rated
600A
500 kVA
80% Rated
800A
100% Rated
700A
550 kVA
80% Rated
1000A
100% Rated
700A