Filter
Top Products
62 Appendix A - Site Planning Data
12.0 APPENDIX A - SITE PLANNING DATA
500-750 kVA Single Module Systems
12.1 Notes
1. Nominal rectifier AC input current (considered continuous) is based on full rated output load.
Maximum current includes nominal input current and maximum battery recharge current
(considered noncontinuous). Continuous and noncontinuous current limit are defined in NEC
100. Maximum input current is controlled by current limit setting which is adjustable. Values
shown are for maximum setting of 125%. Standard factory setting is 115%.
2. Nominal AC output current (considered continuous) is based on full rated output load.
Maximum current includes nominal output current and overload for 10 minutes.
3. Bypass AC input current (considered continuous) is based on full rated output load.
4. Feeder protection (by others in external equipment) for rectifier AC input and bypass AC
input is recommended to be provided by separate overcurrent protection devices.
5. UPS output load cables must be run in separate conduit from input cables.
6. Power cable from module DC bus to battery should be sized for a total maximum 2.0 volt line
drop (measured at the module) at maximum discharge current.
7. Grounding conductors to be sized per NEC 250-95. Neutral conductors to be sized for full
capacity—per NEC 310-16, Note 10—for systems with 4-wire loads and half capacity for
systems with 3-wire loads.
8. Rectifier AC Input: 3-phase, 3-wire, plus ground
AC Output to Load: 3-phase, 3 or 4-wire, plus ground
Bypass AC Input: 3-phase, 3 or 4-wire, plus ground
Module DC Input from Battery: 2-wire, (positive and negative)
9. All wiring is to be in accordance with National and Local Electrical Codes.
10. Minimum clearance is 2 feet above UPS.
11. Top or bottom cable entry through removable access plates. Cut plate to suit conduit size.
12. Control wiring and power cables must be run in separate conduits. Control wiring must be
stranded conductors.
13. For systems with six-pulse rectifiers: 7% maximum input harmonic current and 0.92 lagging
input power factor at full load with optional input filter. 30% maximum input harmonic
current and 0.85 lagging input power factor at full load without optional input filter.
14. For systems with 12-pulse rectifiers: 4% maximum input harmonic current and 0.92 lagging
input power factor at full load with optional input filter. 9% maximum input harmonic
current and 0.85 lagging input power factor at full load without optional input filter.