How long does an Uninterrupted Power Supply (UPS) Battery last?

All lead acid UPS batteries, wet or gel, are prone to natural decay. This is caused by metals and acid sharing the same plastic container but that’s what a battery is! Natural degrading is typically about 5% per annum, depending on the type and brand of battery used. It is because of this degradation that …

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How do I test UPS batteries?

Quantum Controls engineers can attend your site and test all of your UPS batteries, we would then issue detailed report clarifying the health and status of your existing UPS Batteries, to arrange a survey simply send your details to sales@quantum-controls.co.uk

Who can carry out a Harmonic Survey?

Never fear Captain Q and Quantum Controls can carry out on site Harmonic Surveys.  To book yours get in touch at sales@quantum-controls.co.uk

What is a passive filter?

Passive filter needs site survey If a passive filter solution is to be successful, the characteristics of the network must be taken into consideration. The total harmonic voltage distortion of the non-influenced mains voltage has to be less than 2 percent and the ratio of short-circuit power to installed load must be at least 66. …

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What is an active front end Variable Speed Drive?

Easy installation with active filter The active front-end drive is also easier to install, as you only have to consider the mains voltage, the pump absorbed power and the fault level of the network. For a passive filter, you have to consider all of the above plus the existing power factor correction. The filter also …

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What causes Harmonics?

Harmonics are caused by non-linear loads on the network, such as fluorescent lights, computers, welding supplies and AC drives. In the case of AC drives, there is reason to be extra careful, as an individual site can have many of these installed. When adding further AC drives at a site, the total harmonic load should …

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How can I reduce harmonics caused by Variable Speed Drives?

Passive filter needs site survey If a passive filter solution is to be successful, the characteristics of the network must be taken into consideration. The total harmonic voltage distortion of the non-influenced mains voltage has to be less than 2 percent and the ratio of short-circuit power to installed load must be at least 66. …

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How do I reduce Harmonics?

Harmonics caused by AC drives can be mitigated using passive filters or active front-end drives. Passive filters cost less and can be effective under some circumstances; the challenge lies in establishing just what those circumstances are. If the required conditions for a passive filter are difficult to meet, the safest option is to install an …

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What type of cable should be used between variable speed drives and motors?

Long cables in tunnel installation A recent example of a long cable installation is the new road tunnels on the E18 motorway in Finland. Here, 16, 55 kW ABB standard drives for HVAC are used to ensure safe driving conditions by adjusting air flow in the tunnels to demand, controlling the speed and the direction …

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How do I size cable runs between Variable Speed Drive and motors?

The cable should be sized for the motor full load current plus overload, without allowance for harmonic content. When using sizing software, most cable sizing programs assume that 600 percent direct-on-line (DOL) starting current will be required. However, such high currents are never encountered in installations using variable-speed drives. When using a cable sizing programme, …

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