Emerson 250-400kVA Battery Operation, Environmental Conditions, Environmental specifications

SPECIFICATIONS

4.0SPECIFICATIONS

4.1Battery 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.

4.2Environmental Conditions

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	77 (25) ambient
Temperature, °F (°C)
Maximum Operating	104 (40) ambient (design temperature) without derating; (see Notes 2 and 3).
Temperature, °F (°C)
Minimum Operating	0°C
Temperature, °F (°C)
Storage Temperature, °F (°C)	-13 to 158 (-25 to 70)
Typical Battery	Average annual temperature must not exceed 80°F (27°C). Peak temperature
Temperature Requirements	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,	68 dBA typical
5 Feet (1.5m) from Unit

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.

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