Frequently Asked Questions
What is a Power Inverter?
Power Inverters are devices designed for powering household appliances from a car, or similar battery.
They convert 12V or 24V DC battery power to 230V (±10VAC) AC mains power and are an ideal source of portable mains power.
Being compact and portable, power inverters can be used in cars, caravans, boats, 4WDs and trucks. Using a power inverter for household appliances is a much cheaper option than purchasing specialised 12V or 24V appliances for those times when mains power is not available.
Compared to Generators, Power Inverters are a greener and cheaper long term option.
What is a Pure Sine Inverter and what does it do?
Pure (true) sine wave inverters (PSW) produce clean power from a Direct Current (DC) power supply as see by the image below. In fact the power can be cleaner than most house hold alternating current (AC) mains power. Highly efficient pure sine wave inverters replicate standard AC mains power from batteries that provide DC power. These inverters are also known as switch mode converters, because they switch DC power into AC power to enable house hold appliances to be powered in remote areas. This is ideal for people who want to use the power from their regular vehicle batteries or from renewable energy sources eg: Solar. To gain a clearer understanding of the difference in output between mains power, modified sine wave and pure(true) sine wave inverters, check out the diagrams below. A pure (or true) sine wave inverter has a lot more sophisticated electronics compared to a modified sine wave inverter and as a result is more expensive. Modified sine wave power inverters are quite simple electronically and many high powered electric appliances can be powered from them. Kettles, lights, microwaves and power tools are examples where a Modified sine wave can be used. But please use caution; Appliances must be checked to see if they are compatible on modified sine wave. Some appliances can be damaged or the appliance can in fact damage the inverter, If in doubt use pure sine wave. Pure (True) sine wave inverters are now the industry standard and are our primary recommendation. Increasingly, appliance manufacturers are changing to a mandatory pure sine wave power source specification for their appliances.
What is the difference between pure sine wave and modified sine wave inverters?
The Sine wave comparison chart shows the difference in pure sine wave and modified sine wave wave forms.But what does it all mean in terms of performance?
The AC Mains Sine diagram shows how the power output signal looks from any house hold alternating current (AC) power point and pure sine wave (PSW) inverters are designed to replicate the same output.
The Modified Sine Wave Inverter diagram is the power output signal generated from Direct Current (DC) power and is a called a modified sine wave (MSW).Be wary of sellers calling their inverters "sine wave". If they haven't included the word "true" or "pure" then it is probably a 'modified" sine wave.However, modified sine wave is more economical when used on simple loads such as induction loads ie motors and resistive loads such as lights. Modified sine wave inverters are the first choice for these applications as they use DC more efficiently than the pure sine wave.Always double check beforehand to make sure modified sine wave inverters are compatible as new technology devices have electronic motor control.
For example the coffee machines. Earlier models run effectively on MSW inverters whilst the new automated units require PSW inverters to switch power from DC to AC. This is due to the more sensitive electronic sensor control on the boiler and motor control for the pumps.
MSW inverters will remain in the market place as they are the most economical and cost effective inverter to power items such as power tools, drop saws, kettles toasters, sandwich presses and microwaves. (Check they are not digitally controlled)
If the inverter is for only one application such as a water boiler and nothing else, or just for a microwave then the MSW inverter is the right choice. If many appliances may be used then the Pure Sine Wave is the best choice. In some customers applications it is also more cost effective to run a large MSW inverter for the one high powered device and than a smaller PSW inverter for your sensitive appliances.
Always first check with your manufacturer or contact WallCann Technical Services.
How to put your knee high stockings/pantyhose on?
- Turn your socks or stocking inside out, except for the foot portion
- Take the stocking, folded over itself, with both hands then slip your foot inside leading up the heel.
- Pull the stocking gradually back up the leg towards the knee or thigh ensuring to smooth out any wrinkles with the palms of your hands or with the use of gloves (optional)
- Follow the same procedure for the other leg
- Please follow the same procedure above for application of a pantyhose stocking
- Once you have pulled both leg parts up to just below the knee, turn the remaining stocking parts back and ease them gradually up towards the crotch assuring to smooth out any further wrinkles
- Only now should you pull up the body part of the pantyhose up towards the waist. Please make sure you are not overstretching the leg length of the pantyhose at this point.
How fast will my order be delivered?
All Jinni MD products are located in our Adelaide warehouse and will be sent same day if the order is placed before 2:30PM (ACT).
By selecting “Star track Express” on the checkout page, you should see delivery to your door between 1-2 working days depending on your location.
Why are Jinni MD stockings cheaper than other known brands?
When you are buying Jinni MD products, you are buying Australian and direct from a distributor.
Many other brands on the market are from the USA or the UK. These brands have distributors located here in Australia, hence acting as the ‘middle guys’ who add margin to all products imported into the country.
Are your stockings slipping down?
Compression stockings are quite firm, hence they will work their way down the leg whilst moving around during the day. You might find yourself pulling them back up quite frequently. The most common queries we get is that the stocking must be too big because they keep slipping down or on the other hand too small.
The point is that the stockings will keep slipping down on everyone due to the tension in the stocking and the shape of the leg. For example the thigh and calf is usually wider than the ankle.
How do I choose what Inverter is right for my Application?
In order to determine the size Inverter you may require for your specific application. There are several main points that you first need to establish.
- What appliances do I need to run from the Inverter at the same time?
Take into consideration every appliance you may wish to run from the Inverter simultaneously in order to meet your needs.
- What is the power requirement (watts or Amps) of all of these appliances?Adding the total power requirements of all of the appliances that you wish to run will give you an initial indication of what size Inverter may be suitable for your specific application.
- Do any of these appliances contain elements such as a compressor, motor, pump or heating element?
Appliances carrying these listed elements will have special requirements. As their start up requirement will greatly exceed their listed continuous power requirement. You will require a larger Inverter, with the continuous capacity to cover this initial start-up requirement. For more information, please feel free to contact us.
- How to connect my Inverter to my power source?
Smaller Inverters may only provide limited battery connection possibilities. Such as a cigarette lighter plug. Larger inverters will require a direct connection to the DC Battery source. For more options, please speak with a Technical person to ensure you have the right cables and connections for your Inverter. For more technical information, please feel free to contact us.
Can any appliance be run from an Inverter?
Yes and No, in some cases Power inverters are not an efficient way to run appliances that have very high power requirements during start up or continuous operation. This is due to their high current draw and rapid battery depletion. In these cases such as mobile\vehicle applications the batteries required would far outweigh the space, weight and cost. For Off grid solar solutions this would not be the case.
- Electric Heaters
- Stoves/Stove Tops
- Air Conditioner’s
- Large Refrigerators/Freezers
- Energy Saving Lights
- Florescent Lights
- Large Air Compressors
- High Capacity Pumps
- Large Coffee Machines
What is a suitable power source to operate an inverter?
To operate an inverter and supply power to an appliance, a suitable 12V DC power supply is required. This can be a vehicle, boat or caravan battery, portable power pack or an independent 12V lead acid battery. For most applications, a deep cycle battery is recommended for best performance.
How do I connect to a DC power source?
CAUTION: Before making any connections ensure inverter is switched off and has no AC appliances plugged into the AC output sockets.
- Connect the ring terminal on the positive lead (Red) to the positive (Red) DC terminal on the back of the inverter.
- Connect the battery clip (Red) or ring terminal on the other end of the lead to the positive DC supply or (+) battery terminal.
- Connect the ring terminal on the negative lead (Black) to the negative (Black) DC terminal on the back of the inverter.
- Connect the battery clip (Black) or ring terminal on the other end of the lead to the negative DC supply or (-) battery terminal.
|Inverter Connection Step by Step|
Ensure the inverter is switched off
Connect the positive cable to the battery
Connect the negative cable to the Battery
Connect the positive cable to the inverter
Connect the negative cable to the inverter (the cable may spark upon initial contact. This is normal and will not harm the inverter or yourself).
Best practice is to connect the case
directly to an earth. In vehicles a true earth is not avail unless an earth stake is used.
Ensure the appliance is switched off
Plug the appliance in
Switch the inverter on (a short beep may be heard, this is normal)
Switch on your appliance and operate as normal
How do I connect 8Zed 150W USB Cup Inverter?
|Ensure the inverter is switched off|
|Ensure your device is switched off|
|Plug device into your 3pin (cigarette lighter) accessory|
| To use while the car is turned off, switch your car to accessory to power the 3pin (cigarette lighter) accessory.
Alternatively, switch on your isolator to provide power to your 3pin (cigarette lighter) accessory.
|To use while running your vehicle,
ensure to inverter is switched off.
|Start your car|
|Switch on your 8Zed Inverter|
|Switch on your appliance|
Axess Pro 3100 series Roller shutter Motor
The overload on the 1HP motor is set to overload at 30Amps. Its normal continuous running is 10amps.
The continuous running load is around 800W, allowing for the possibility of overload to 2400w.
So a will give you plenty of margin for high current draw and up to overload 30Amps ie at motor start up or roller jam and or obstruction.
Power a US Bosch Nexxt Appliance in Australia.
Bosch Dryer 500 series 1400W 12A
Bosch Washer 300 series 1350W 15A
See appliance specifications.
For safety reasons, we recommend each appliance is run from a separate 8ZED STXP-U3000.
A single STXP-U4000 step down converter would probably cope with powering both, but is the maximum you can use in a domestic power situation.
However if both Dryer and Washer are running together the single cable from the converter to domestic plug socket will get very hot and you run the risk of blowing your converter and house wiring fuses.
The solution is simple, run the dyer and washer from separate voltage converters.
If possible plug each converter into a separate plug socket.
Appliances like these require a power surge at start up to heat up to operating temperature.
Hence the requirement to use the STXP-U3000 for the Dryer - continuous 1400W / surge2800W and a separate STXP-U3000 for the Washer - continuous 1350W / surge 2700W.
The Bosch manufacturer specifications are quite detailed.
The units are highly efficient, but you must take care.
A high switch load with a 2:1 voltage conversion ratio will apply.
Most domestic wiring systems are built to a maximum current per line of 15 Amps. This means you will trigger fuses on a domestic system if both Dryer and Washer are running from a single converter on a single plug socket. (Unless you have a 30Amp plug and wiring systems not seen in most homes).
A less viable option is to purchase a much more costly and bulkier Isolated Converter like our STIS range of over 3000W plus Isolated Converters. To get full value from this investment you would need to be running industrial/commercial applications with 30Amp rated power lines and switch gear.
Does a Transformer Frequency 50Hz or 60Hz make a difference?
Australian designed Transformers rated for 50Hz, have been operating on a 60Hz supply for the past decade. 8ZED™ transformers are 50 Hz which run very effectively on 60 Hz mains supply. The effect of frequency is the generation of a particular EMF of a transformer. A given flux density will increase with frequency. By operating at higher frequencies, transformers can be made physically more compact and cheaper, because a given core is able to transfer more power without reaching saturation. Therefore, smaller thickness laminations for autotransformers or fewer turns for toroidal transformers are needed to achieve the same impedance. Conversely, the lower the operating frequency the more flux lines that are generated. Operating a transformer at 50Hz generates 20% more flux lines than at 60Hz, but it will run considerably cooler. The trade-off is that the 50 Hz auto transformer require more and thicker laminations to carry the extra flux lines to reach the required current impedance. The 50 Hz Toroidal transformers require more windings making it 10% heavier and larger than the more compact 60 Hz transformers.
Therefore, because of the greater size and material, a transformer designed to run at 50Hz will simply run cooler at 60Hz. However, the more compact and slighter 60 Hz transformer will not work as well on a 50Hz mains power. It will easily overheat and not run efficiently.The 8ZED™ Step-Down transformers, set to convert 240V 50 Hz AC mains supply to very successfully operate appliances built for 60 Hz 120V AC supply frequency. Similarly, 8ZED™ Step Up transformers are extensively used to safely run modern 50 Hz Australian appliances on American 60 Hz power grids.
Many thousands of 8ZED™ transformers are used in commercial and consumer applications for over a decade. 8ZED™ is the trusted supplier to discerning users including The American Embassy for Consulate and Defence applications. Always check with manufacturers recommendations before making a selection, or contact customer helpline support at WallCann.
Are frequency converters 50Hz to 60Hz available?
Yes, purpose-built electronic or electromechanical devices that convert AC current of one frequency to AC current of another frequency are available. These power converter inverters can also change the voltage, but if it does, that is incidental to its principal purpose.
Traditionally, these devices were electromechanical motor-generator set. With the development of solid-state electronics, frequency converter inverters are built to operate as electronic frequency changers. These switch mode power inverter devices usually consist of a rectifier stage (producing direct current) which is then inverted to produce AC of the desired frequency.
If voltage conversion is desired, a transformer will usually be included in either the ac input or output circuitry. This transformer may also provide isolation between the input and output AC circuits. A battery may also be added to the DC circuitry to improve the converter's ride-through during brief outages in the input power.
For the past 15 years, modern 50 Hz transformer materials technology has improved and have become a far more practical and significantly less expensive alternative. As a result for most applications, the 50 Hz to 60 Hz frequency converter has become redundant for most appliances. A 50 Hz transformer will comfortably run on 60 Hz mains supply, with the added advantage of running a much cooler operation. The disadvantage is the 50 Hz transformer is at least 10% heavier and bulkier than the 60 Hz transformer. The 50 Hz transformer, due to their additional material design and bulk is capable of generating 20% more flux lines required to operate on a 60Hz AC supply.
The compact and slighter 60 Hz transformers will not work as well on 50Hz mains power. They readily overheat and not run efficiently, risking damage to the appliance.
The 8ZED™ Step-Down transformers, set to convert 240V 50 Hz AC mains supply to very successfully operate appliances built for 60 Hz 120V AC supply frequency.
Similarly, 8ZED™ Step Up transformers are extensively used to safely run modern 50 Hz Australian appliances on American 60 Hz power grids.
Many thousands of 8ZED™ transformers are used in commercial and consumer applications for over a decade. 8ZED™ is the trusted supplier to discerning users including The American Embassy for Consulate and Defence applications.
Always check with manufacturers recommendations before making a selection, or contact customer helpline support at WallCann.