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EMC and VFDs in New Zealand

Poor VFD design and/or poor VFD installation causes electromagnetic interference which typically takes the form of conducted emissions.

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EMC and VFDs in New Zealand | vfd-emc.co.nz Reviews
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EMC and VFDs in New Zealand | vfd-emc.co.nz Reviews

https://vfd-emc.co.nz

Poor VFD design and/or poor VFD installation causes electromagnetic interference which typically takes the form of conducted emissions.

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vfd-emc.co.nz vfd-emc.co.nz
1

EMC and VFDs - Installation on submersible pumps.

http://vfd-emc.co.nz/sub-pump-install.php

VFDs generate conducted EMC. Using Screened Cable to minimise EMC. Submersible Pump VFD Install. VFDs in Cow Sheds. VFDs in Hazardous regions. VFD EMC Test Results. Submersible Pump VFD installation for minimum EMC problems. Determine the environmental requirements for the EMC levels. High sensitivity area will require installation to domestic levels. Standard environment in remote area will require industrial levels. The Variable Frequency Drive shall be connected to the well head terminal box via one o...

2

EMC and VFDs in Cow Sheds

http://vfd-emc.co.nz/cow-shed.php

VFDs generate conducted EMC. Using Screened Cable to minimise EMC. Submersible Pump VFD Install. VFDs in Cow Sheds. VFDs in Hazardous regions. VFD EMC Test Results. VFDs in Cow Sheds (Dairy Parlors). VFDs are used in Cow Sheds (Dairy Parlors). VFDs are commonly used in cow sheds for a number of applications:. Milk Pump. VFDs are becoming commonly used to control the milk pump with the speed adjusted to match the milk flow. Stray Voltage in Cow Sheds (Dairy Parlors). Stray voltages in cow sheds have been ...

3

EMC and VFDs in New Zealand

http://vfd-emc.co.nz/index.php

VFDs generate conducted EMC. Using Screened Cable to minimise EMC. Submersible Pump VFD Install. VFDs in Cow Sheds. VFDs in Hazardous regions. VFD EMC Test Results. EMC is an acronym for ElectroMagnetic Compatibility. There are two types of emissions, radiated emissions and conducted emissions. Radiated emissions are generally high frequency emissions above several megahertz and the conducted emissions are the lower frequency emissions. (below ten megahertz). What does EMI do? An example of EMI, is the b...

4

EMC and VFDs

http://vfd-emc.co.nz/vfd-emc-tests.php

VFDs generate conducted EMC. Using Screened Cable to minimise EMC. Submersible Pump VFD Install. VFDs in Cow Sheds. VFDs in Hazardous regions. VFD EMC Test Results. EMC Tests of VFDs. Test 1 : Measure the relative EMC voltages for different types of VFD - Motor connection. The voltage between the frame of the motor and the frame of the reference VFD are measured using a 100MHz oscilloscope with a 470 ohm termination resistor. EMC Screened Cable with EMC Glands to VFD and Motor. Be used on ALL. Good resul...

5

EMC and VFDs in New Zealand - News

http://vfd-emc.co.nz/news.php

VFDs generate conducted EMC. Using Screened Cable to minimise EMC. Submersible Pump VFD Install. VFDs in Cow Sheds. VFDs in Hazardous regions. VFD EMC Test Results. Latest EMC and VFD News in New Zealand. SNZ HB 6117:2014 Electrical installations in dairy sheds has been released. This standard also covers the installation of VFDs in dairy sheds for reducing high frequency stray voltages. MED publish PIB 49. Guide to installing VFDs. Cow Shed Stray Voltage page added. NO BS EMC Guide added.

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LINKS TO THIS WEBSITE

powersaver.co powersaver.co

Useful Links

http://www.powersaver.co/links.php

Domestic PFC - FAQ. Advanced Motor Control Ltd. New Zealand based supplier of premium motor control equipment. The correct installation of VFDs minimises the EMC generated. EMC from incorrectly installed VFDs cause severe interference with communications equipment and can damage sensitive electronic circuits. New Zealand based supplier of premium GSM, SMS and text messaging control equipment. Mirus Lineator Harmonic Filters. Guaranteed to meet NZ standards. General Motor Control discussion forum website.

pump-control.co.nz pump-control.co.nz

AMC Pump Controller - NZ Links

http://www.pump-control.co.nz/link-page.php

New Zealand owned and operated, NO B.S. Advanced Motor Control Ltd. New Zealand based supplier of premium motor control equipment. The correct installation of VFDs minimises the EMC generated. EMC from incorrectly installed VFDs cause severe interference with communications equipment and can damage sensitive electronic circuits. New Zealand based supplier of premium GSM, SMS and text messaging control equipment. Mirus Lineator Harmonic Filters. Guaranteed to meet NZ standards. Horner OCS and PLCs. New Ze...

logic-relay.co.nz logic-relay.co.nz

Logic Relays - NZ Links

http://logic-relay.co.nz/link-page.php

Advanced Motor Control Ltd. New Zealand based supplier of premium motor control equipment. The correct installation of VFDs minimises the EMC generated. EMC from incorrectly installed VFDs cause severe interference with communications equipment and can damage sensitive electronic circuits. New Zealand based supplier of premium GSM, SMS and text messaging control equipment. Mirus Lineator Harmonic Filters. Guaranteed to meet NZ standards. Horner OCS and PLCs. General Motor Control discussion forum website.

power-factor.co.nz power-factor.co.nz

Power Factor - Useful Links

http://power-factor.co.nz/link-page.php

Power Factor Definitions and terms. Detuned Power Factor Correction. Power Factor Capacitor Selection. Power Factor Order Codes. Contact Us about Power Factor. Advanced Motor Control Ltd. New Zealand based supplier of premium motor control equipment. The correct installation of VFDs minimises the EMC generated. EMC from incorrectly installed VFDs cause severe interference with communications equipment and can damage sensitive electronic circuits. Mirus Lineator Harmonic Filters. Horner OCS and PLCs.

imphotonics.com imphotonics.com

VFD Installation for pumps with minimum EMC

http://www.imphotonics.com/vsd/vsd_05.htm

Suggested Code of practice for connection of. Variable Frequency Drives to Surface mounted irrigation pumps. Determine the environmental requirements for the EMC levels. High sensitivity area will require installation to domestic levels. Standard environment in remote area will require industrial levels. The variable speed controller shall be connected to the supply in the manner described in the manufacturers installation guide for the domestic or industrial levels. The screen is to be terminated to the...

smart-relay.co.nz smart-relay.co.nz

Smart Relays - NZ Links

http://smart-relay.co.nz/link-page.php

Advanced Motor Control Ltd. New Zealand based supplier of premium motor control equipment. The correct installation of VFDs minimises the EMC generated. EMC from incorrectly installed VFDs cause severe interference with communications equipment and can damage sensitive electronic circuits. Horner OCS and PLCs. New Zealand based supplier of premium OCS and PLC. New Zealand based supplier of premium GSM, SMS and text messaging control equipment. Mirus Lineator Harmonic Filters. New Zealand Web Directories.

power-harmonics.co.nz power-harmonics.co.nz

Power Harmonics - NZ Links

http://power-harmonics.co.nz/link-page.php

What is a Harmonic? What do Harmonics do? Advanced Motor Control Ltd. New Zealand based supplier of premium motor control equipment. The correct installation of VFDs minimises the EMC generated. EMC from incorrectly installed VFDs cause severe interference with communications equipment and can damage sensitive electronic circuits. New Zealand based supplier of premium GSM, SMS and text messaging control equipment. Mirus Lineator Harmonic Filters. Guaranteed to meet NZ standards. Horner OCS and PLCs.

soft-starter.co.nz soft-starter.co.nz

Soft Starters - NZ Links

http://soft-starter.co.nz/link-page.php

How Soft Starters Work. AuCom CSX Soft Starter. AuCom CSXi Soft Starter. AuCom IMS2 Soft Starter. AuCom EMX3 Soft Starter. AuCostart EMS Soft Starters. Advanced Motor Control Ltd. New Zealand based supplier of premium motor control equipment. The correct installation of VFDs minimises the EMC generated. EMC from incorrectly installed VFDs cause severe interference with communications equipment and can damage sensitive electronic circuits. Mirus Lineator Harmonic Filters. Guaranteed to meet NZ standards.

softstart.co.nz softstart.co.nz

Soft Starters - NZ Links

http://softstart.co.nz/link-page.php

How Soft Starters Work. Advanced Motor Control Ltd. New Zealand based supplier of premium motor control equipment. The correct installation of VFDs minimises the EMC generated. EMC from incorrectly installed VFDs cause severe interference with communications equipment and can damage sensitive electronic circuits. New Zealand based supplier of premium GSM, SMS and text messaging control equipment. Mirus Lineator Harmonic Filters. Guaranteed to meet NZ standards. General Motor Control technology website.

pressure.co.nz pressure.co.nz

Pressure Transducers - Links

http://pressure.co.nz/link-page.php

How Pressure Transducers work. Pressure Transducer Order Codes. Contact Us about Pressure Transducers. Advanced Motor Control Ltd. New Zealand based supplier of premium motor control equipment. The correct installation of VFDs minimises the EMC generated. EMC from incorrectly installed VFDs cause severe interference with communications equipment and can damage sensitive electronic circuits. New Zealand based supplier of premium GSM, SMS and text messaging control equipment. Mirus Lineator Harmonic Filters.

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EDM is an acronym for Electrical Discharge Machining. And is one mode of damage that is done to bearings where high frequency bearing currents are caused to flow. What causes EDM with VFDs? The prime source of EDM is the steep rising/falling voltage edges of the PWM waveforms. Reducing the dv/dt and the di/dt will reduce the EDM without any alteration to the motor design or connection. The high frequency component of the voltage which causes the EDM is known as Common Mode Voltage. A grounding brush acro...

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EMC and VFDs in New Zealand

VFDs generate conducted EMC. Using Screened Cable to minimise EMC. Submersible Pump VFD Install. VFDs in Cow Sheds. VFDs in Hazardous regions. VFD EMC Test Results. EMC is an acronym for ElectroMagnetic Compatibility. There are two types of emissions, radiated emissions and conducted emissions. Radiated emissions are generally high frequency emissions above several megahertz and the conducted emissions are the lower frequency emissions. (below ten megahertz). What does EMI do? An example of EMI, is the b...

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