Eaton BladeUPS 5 kVA to 60 kVA (N+1) User’s Guide 164201649—Rev 14 77
Figure 62. BladeUPS Hardwired Terminal Block
Table 9. BladeUPS Hardwired Wiring Specifications
Wire Function Terminal Position
Terminal Wire Size
Rating*
Tightening Torque
Ground Gnd
6 AWG
14 LB.IN. (1.6 Nm)
Phase3– Output L3
Phase2– Output L2
Phase1– Output L1
Neutral- Output N
Neutral- Input N
Phase3– Input L3
Phase2– Input L2
Phase1– Input L1
Protective Earth PE
* Use 75C copper wire minimum. Suggested wire size is based on full load ratings applied to NEC Code Table 310.16.
NOTE If a 4-pole Automatic Transfer Switch (ATS) is used to connect the UPS to a generator or alternative input source, it
may interrupt the UPS input neutral during its transition between sources. This UPS should always have an input
source neutral connected at the bypass input terminals. This neutral must be continuous and uninterrupted; even if
there are no phase-to-neutral loads connected to the UPS output. If the UPS is fed from a 4-pole ATS that interrupts
the neutral, a delta-to-wye isolation transformer, with its secondary neutral bonded to ground, must be placed in line
with the bypass input of the UPS. This will provide an uninterrupted neutral to the UPS, regardless of the position of
the ATS neutral contact. If an overlapping neutral or make-before-break ATS switch is used, the neutrals must
overlap for a minimum of 50 msec during the transition. In these cases, a transformer is not needed. For the
BladeUPS a neutral break of over 50ms may be acceptable Please consult with Eaton engineering resources to
confirm this is will not create an operational issue.
9. Replace the input box access cover and secure with the four screws removed in Step 4.
Hardwired Installation
To Next Page
Loading...
