Eaton 9EHD Series, Manual

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UPS Installation Plan and Unpacking
Eaton 9EHD UPS (80-200 kVA, 380/400/415V) Installation and Operation Manual 3
Table 3-8. Recommended Bypass Circuit Breaker, Output Circuit Breaker and Bypass
Fuse
Ratings
Circuit Breaker Rating
Fuse parameters
UPS Model Load Derating 400V current/Min I2T/Max
9EHD-33-80 80% Derated
144A
160A 361000A2s
100% Rating
115A
9EHD-33-100 80% Derated
180A
200A 361000A2s
100% Rating
144A
9EHD-33-150 80% Derated
271A
300A 432000A2s
100% Rating
217A
9EHD-33-200 80% Derated
361A
400A 1805000A2s
100% Rating 289A
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 3-5. The recommended line-to-line load unbalance is 50% or less.
Readily accessible disconnect devices (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 bypass
and output circuit breakers.
There is no DC disconnect device within the UPS. A battery disconnect switch is recommended, And may be
required by local codes when batteries are remotely located. The battery disconnect switch should be installed
between the battery and the UPS
External DC input overcurrent protection and disconnect switch for the remote battery location is to be
provided by the user. Table 3-9 lists the maximum rating for continuous-duty rated circuit breakers satisfying the
criteria for both.
Battery voltage is computed at 2 volts per cell. Rated battery current is computed at 2 volts per cell. The battery
wiring used between the battery and the UPS should not allow a voltage drop of more than 1% of nominal DC
voltage at rated battery current. If the conductors used for DC input from the battery cabinets to the UPS are
those provided by the UPS manufacturer, and the UPS and battery cabinets are manufactured by the same
supplier, then it is acceptable if they do not meet the noted minimum conductor sizes.
Table 3-9. Recommended DC input circuit breaker rating
Circuit Breaker Rating
UPS Model Load Derating
Rated battery voltage
(DC 480V, External battery 40 blocks)
9EHD-33-80
80% Derated
206A
100% Rating
165A
9EHD-33-100
80% Derated
240A
100% Rating
206A
9EHD-33-150
80% Derated
386A
100% Rating
309A
9EHD-33-200
80% Derated
515A
100% Rating
412A