Improving Power Factor with Variable Speed AC Drives. Utility power plant generators are usually designed for a power factor (PF) of .8 to .9.
If demand-side PF is lower than the designed PF, the generator current will rise above the equipment's rated current or the active power output must be limited. As a result, these utilities put limits on reactive power consumed by their customers, who have to pay a penalty if their PF falls below certain limits, which can range from .8 to .97.
Electric motors connected to the power line are the main reason for reduced PF. The rated PF of a standard motor depends on its rated power and, typically, is around .85. However, it can be much lower if the motor is lightly loaded (Fig. 1). Fig. 1. Before examining its effects on motors, a discussion of PF is in order. The term power factor is often confused with cos φ (phi). Remember that cos φ is equal to power factor only when both system voltage (U) and system current (I) are sinusoidal and at the same frequency. Fig. 2. Fig. 3. The benefits of VSDs Fig. 4. Fact packs part2.pdf (application/pdf Object) VSD. Eaton H-Max Drive for HVAC, Pump and Fluid Applications. Sign In Customer Support USA | Worldwide Sites Home >...
> Variable Frequency Drives > HVAC Drives > H-Max Series Products & Solutions Industrial Clutches and Brakes Plastic Extrusion The Power of Eaton Markets Our Company Electrical Products & Services Follow the Charge Market Solutions Your Business How to Buy. Variable Frequency Drives for Motor Speed Adjustment. ABB Drives Range + NZ Capability 2012Q2v6.pdf. Press Release - Power+Factor+Improved+Via+AC+Drives+-+Release.pdf. Danfoss VSD I/O MI38B202 - (MCB109) - Analog I-O Option Operating Instructions.pdf. Danfoss CSD I/O MI38A102 - (MCB101) - General Purpose IO Operating Instruction.pdf. CAN in Automation (CiA) - CANopen Product Guide. Automation and Control - Schneider Electric. Altivar 61 Instruction Bulletin.pdf.
Altivar 61 - 30072-451-60.pdf (application/pdf Object) Altivar 61 - 30072-451-57.pdf (application/pdf Object) Altivar 61 technical description for altivar engineered drives.pdf (application/pdf Object) Harmonic distortion tables.xls. Motor Chokes dV/dT Filter - VW3A5104.pdf (application/pdf Object) VW3A5104 Telemecanique. EU Directive 2002/95/EC restricts the use of the 6 substances below in the manufacture of specified types of electrical equipment.
Whilst this restriction does not legally apply to components, it is recognised that component “compliance” is relevant to many customers. RS definition of RoHS Compliance: The product does not contain any of the restricted substances in concentrations and applications banned by the Directive, and for components, the product is capable of being worked on at the higher temperatures required by lead–free soldering The restricted substances and maximum allowed concentrations in the homogenous material are, by weight: The supplier of the item listed below has informed RS Components that the product is “RoHS Compliant”. RS Components has taken all reasonable steps to confirm this statement. Power Electronics VSDs. Drive Link September 2011 Ed 18.pdf.