Daikin WMC Specifications download pdf (Page 40)

40 Catalog 602-2

The power line noise emissions associated with

variable frequency and variable speed drives can

cause disturbances in nearby equipment. Typical

disturbances include:

 Dimmer and ballast instability

 Lighting disturbances such as flashing

 Poor radio reception

 Poor television reception

 Instability of control systems

 Flow meter totalizing

 Flow metering fluctuation

 Computer system failures loss of data

The IEEE 519-1991 Standard

The Institute of Electrical and Electronics

Engineers (IEEE) has developed a standard that

defines acceptable limits of system current and

voltage distortion. A simple form is available from

McQuay International that can be used to perform

a harmonics analysis and to determine compliance

with IEEE 519-1991.

Line reactors, isolation transformers, or phase-

shifting transformers can be required on some

installations.

 Radar disruption

 Sonar disruption

 Thermostat control problems

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Daikin WMC Specifications Page 40