Archive: 09/03/2021

The Sinexcel Active Voltage Conditioner - Voltage Sag and Surge Protection

New Zealand has a robust electrical network but even the most reliable of networks is not immune to voltage sags, brownouts, or surges. Read More »

Power Factor Correction - Understanding the Issues

In our third and final article in our Power Factor Correction series we will delve into the effects of voltage transients and resonance on traditional power factor systems. Read More »

Power Factor Correction - Distortion or Displacement

In today’s modern electrical environment power factor correction is not quite as easy to design as in years gone by. Read More »

Harmonic Blocking Chokes - Are they a guaranteed solution for capacitor based power factor?

The purpose of a blocking choke is simple. The inductance of the choke and the capacitance of the power factor correction capacitors form a simple tuned LC filter. Read More »

The Hidden Benefits of the SVG Inverter Based Power Factor System - Current Balancing

It is such a common issue -in practical power systems it is nearly impossible to maintain perfect balance or symmetry between phase currents. Read More »

Control and Efficiency - Key drivers for the ANZCO

Situated alongside the lower reaches of the Waitara River in Taranaki the ANZCO Foods Processing site has a rich history dating back to the earliest New Zealand meat export trade. Read More »

Harmonics - What should my Variable Speed Drive have?

The installation of increased numbers of non-linear load devices, such as variable speed drives, onto electrical networks that are at, or above capacity has seen a rapid increase in interest... Read More »

Variable Speed Drives - Getting It Right (Part 2)

Part 1 on VSD selection and getting it right has already delved into the importance of understanding the load type (variable torque or constant torque) and temperature ratings when choosing... Read More »

Variable Speed Drive Selection - Getting It Right (Part 1)

It is that age old dilemma – You have got pricing for two variable speed drives from different manufacturers but how do you know you’re comparing “Apples for Apples” and... Read More »

Filtering out the noise - Understanding IEC 61800-3 (Part 3)

Now in this final installment we will look at how the manufactures rate their levels of EMC compliance. Read More »

Filtering out the noise - Understanding IEC 61800-3 (Part 2)

Part 3 of IEC 61800 specifies electromagnetic compatibility (EMC) requirements for power drive systems (PDSs). These are adjustable speed a.c. or d.c. motor drives. Read More »

Filtering out the noise - Understanding IEC 61800-3

Go to the internet and you can search for any number of white papers on the theories of RFI and variable speed drives, but try and get an accurate comment... Read More »

Power Electronics secures order for NZ's first grid-connected solar farm

With New Zealand’s highest number of sunshine hours, Marlborough seems like the most logical place for New Zealand’s first grid-connected utility scale photovoltaic solar project. Read More »

SD500SP and SD700SP - Pumping Using Energy from the Sun

It is a natural fit – with expertise in both AC motor control and utility scale solar inverters it seems the perfect solution to tie both technologies together – enter... Read More »

Power Electronics ASVG Power Quality System at Fonterra Hautapu ticks all of the boxes

Vishaal Lad, Electrical Engineer for Fonterra Hautapu identified that several switchboards on site had power factor correction equipment that was either not working, non-existent or not economical to maintain due... Read More »

Prevention is better than cure- Melody's New World

During a routine maintenance check of Melody’s New World in Palmerston North, B & M Electrical deemed that the power factor correction unit operating on the main switch board was... Read More »

Three Phase Load Balancing - It Can Be a Moving Target

Conventional industrial three phase systems have traditionally been balanced by physically reconfiguring loads at the switchboards. Read More »

Power Electronics Apps

Power Electronics Tool Suite is now available as an app. Read More »

Power Factor Correction - Understanding the issues

Go to the internet and you can search for any number of white papers on the theories of Power Factor Correction, how to size your PF system, and engineer out... Read More »

Outdoor Medium Voltage Variable Speed Drive

Power Electronics has supplied an 11,000 Volt, 1.0 Megawatt XMV660 Variable Speed Drive to a New Zealand customer in late 2019. Read More »