Emerson 250-400kVA - Manual (Page 45)

SPECIFICATIONS
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4.0 S
PECIFICATIONS
4.1 Battery Operation
The separate battery manufacturer’s manual, available on the manufacturer’s Web site, provides the
necessary information for the installation, operation and maintenance of the battery. Use the battery
manual in conjunction with this manual.
The float charge voltage for a battery is equal to the number of cells in series making up the battery
multiplied by the charge voltage for each cell.
Because the charging voltage level is critical to proper battery operation, refer to your battery man-
ual, available on the manufacturer’s Web site, for information about your system.
For models with nominal 240-cell battery, the DC bus nominal float voltage range is 527 to 561VDC.
Maximum equalize voltage is 585VDC. Battery voltage at end of discharge is 386VDC at the UPS ter-
minals (389VDC at the battery). The number of battery cells required will range from 236 to 244,
depending on the application.
4.2 Environmental Conditions
Notes on Environmental Specifications
1. This category of electronic equipment is agency rated for use in an atmosphere free of conductive
particles. Some industrial facilities may require a room air filtration system to keep the UPS free
of excess moisture and contaminants.
2. The UPS system is designed to operate continuously at 104°F (40°C). However, design equipment
life expectancy will be extended with lower temperatures (25°C is recommended).
3. Ambient temperature is the maximum ambient temperature during any 24-hour period. For
operation at higher temperatures, consult your Liebert sales representative or call Liebert
Services at 1-800-LIEBERT.
4. Exercise care during installation to ensure unimpeded airflow through the UPS.
5. For operation at higher elevations, consult your Liebert sales representative or call Liebert
Services at 1-800-LIEBERT.
Table 5 Environmental specifications
Parameter Specification
Enclosure
The UPS is housed in a NEMA-1 enclosure. The enclosure is designed for indoor
use only and is not to be subjected to falling objects or precipitation.
Recommended Operating
Temperature, °F (°C)
77 (25) ambient
Maximum Operating
Temperature, °F (°C)
104 (40) ambient (design temperature) without derating; (see Notes 2 and 3).
Minimum Operating
Temperature, °F (°C)
0°C
Storage Temperature, °F (°C) -13 to 158 (-25 to 70)
Typical Battery
Temperature Requirements
Average annual temperature must not exceed 80°F (27°C). Peak temperature
must not exceed 109°F (43°C). See battery manufacturer’s recommendations.
Relative Humidity 0 to 95% without condensation
Operating Elevation Sea level to 4900 ft. (1500m) without derating
Storage Elevation Sea level to 50,000 ft. (15,240m)
Audible Noise,
5 Feet (1.5m) from Unit
68 dBA typical