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Wire Wound Resistors – Local Manufacturing Advantages

Being a local manufacturer of wire wound resistor assemblies has offered local manufacturers many benefits over the last 50 years. Based in Minto, N.S.W. , we can manufacture wire wound resistors up to 1200 watts and custom resistor bank assemblies into the kilowatts. The basic design and technology behind wire wound resistors has not changed greatly over the last 70 years and this is testament to the reliability of their construction. Our tubular power resistors offer local manufacturers many benefits when a high power resistor is required that is of quality construction and available on very short lead time. These benefits […]

October 2017 – Resistor Manufacturing Applications

Having manufactured wire wound resistors for well over 50 years there are very few applications that we have not come across. Current sensing resistors are often required in applications from motor speed control, electric motor overload sensing circuits and the likes. With the increased uptake of solar power in Australia in recent years, both off grid and grid connected there have been a number of local manufacturers (particularly in South Australia), involved in the manufacture of solar inverters ranging from 50 watts up to several kilowatts. One of the requirements of switch mode solar inverters is the need for a […]

October 18th, 2017|current sense resistor, solar power|

Wire Wound Resistor and Power Resistor Manufacturing Update – July 2017

13 July 2017

Current manufacturing lead times on our range of power resistors and wirewound resistors are currently running at 1 to 2 weeks, however for urgent orders please contact us and we can generally expedite delivery if required.

For reasonable quantities we can supply aluminium housed (metal clad) resistors in the following wattages:

5 watts
10 watts
25 watts
50 watts
80 watts
100 watts
250 watts

These resistors feature compact size for their wattage and are mechanically robust and offer high precision. The are available in a non inductive winding as an option.

Resistor Samples

We can provide samples of resistors for engineering evaluation and can typically supply samples with […]

Electricians Application For Power Wire Wound Resistors

Our range of wire wound resistors have been used in thousands of applications for over 50 years in Australia. An inner west Sydney electrician has used our metal clad resistors in an interesting application recently. The application involved using a 0.01 ohm, 50 watt power resistor in a current sensing application on an industrial sized electric motor driven roller door. The door was driven by a 1.5 kilowatt a.c. electric motor. The application for the power resistor was to detect the current drawn by the motor and detect current overload conditions that could be experienced when the roller door stalled, […]

July 5th, 2016|Applications, metal clad resistors, Power Resistor|

Power Resistors

23 May 2016. By definition, power resistors are designed to dissipate high power ratings (current times voltage across the resistor) at a nominated electrical resistance. This is often necessary when working with electrical circuits where significant voltage and / or electrical current are present. Ohms Law dictates that the power dissipated in a power resistor can be calculated as:

Power = Current squared x Electrical resistance or

Power – Current x Voltage dropped across the resistor

These are fundamental ways to determine the correct wattage of the power resistor required for a particular electrical application or circuit. The specification for power resistors not only […]

May 23rd, 2016|Power Resistor|

Rheostats – Uses In 2016

Rheostats have been used in the electrical and electronics industries since the 1920’s and still have a place in modern engineering. The rheostat has the following benefits:

ability to vary and control electrical resistance at relatively high power ratings
available as an ‘off the shelf’ (short lead time) device
quickly and easily mounted
rugged, ‘tried and tested’ design
ease of termination of wiring

We currently manufacture our rheostat range in the following wattages;

25 watt
50 watt
150 watt
300 watt
500 watt

Rheostat Specifications:

The ‘APR’ series has been manufactured in Australia for well over 50 years and has a reputation for offering the highest levels of reliability, both electrically and mechanically. […]

April 11th, 2016|Resistor Applications, Rheostat|

Wire Wound Potentiometer

Update 23 March 2016 – Wire Wound Potentiometer

Current lead times on wire wound potentiometer production at our Minto manufacturing facility are currently on a 1-2 week lead time depending on quantity, type and quantity required. We can make custom made wire wound potentiometers to your requirements, ranging from dual gang, custom made potentiometer shaft length and any resistance required that falls within the standard range which is 1 ohm to 50,000 ohms. We can supply ‘off tool’ samples for customers to verify the specifications meet their requirements. For volume orders contact us to confirm the lead time for production of […]

March 23rd, 2016|Applications, wire wound potentiometer|

Update February 2016 – Wire Wound Resistors, Wire Wound Potentiometers and Power Resistor Lead Times

13 February 2016. We get a number of requests for lead time updates on our range of resistive products. Lead times can vary depending on our order backlog, stock of components parts and holiday seasons. We can typically react very quickly to all customer orders. Our suggestion is to contact us with your resistor requirement including type of resistors required, the quantity required and any special requirements including urgent delivery. We look forward to assisting you and look forward to your enquiry.

February 14th, 2016|Power Resistor, wire wound potentiometer, Wire Wound Resistors|

Wire Wound Potentiometer Manufacturing

The usage of wire wound potentiometers has varied hugely since we started manufacturing them well over 60 years ago. As modern electronic design concepts and digital electronics have evolved over the last 20 years the demand for wire wound potentiometers has declined however there is still a good market and demand for these products from a wide variety of nice markets. These markets include:

audio amplifiers, both valve and solid state
industrial control circuits requiring a wattage of 2 to 3 watts power rating
lighting control circuits
motor control circuits
laboratory test jigs
replacement market
heater control circuits
transportation related industries

As Australia’s only manufacturer of wire wound potentiometers we […]

January 5th, 2016|Applications, resistor manufacturer, wire wound potentiometer|

Cement Power Resistor

The term cement power resistor refers to a design and construction method of producing wire wound resistors and power resistors. This method of construction has been used for over 70 years and is still widely used today to produce resistors with these characteristics:

high reliability
low cost production
stable temperature performance
compact design
wide range of power ratings possible
resistance tappings possible
ease of mounting and a variety of types of mounting brackets available

Construction Of Cement Filled Resistors

The above image shows a PW50 50 watt wire wound resistor. The resistance winding is encased in a rectangular ‘ceramic boat’. Once the winding is placed into this ‘boat’ it is […]