UK’s Leading Engineering Forum For Todays Engineer

Providing Regular Tips & Advice on Variable Speed Drives, Motors & Industry Related Topics

Category Archive: Drives

Dec
15
2017

What are the top safety tips for electrical engineers?

Seven steps that save lives// While we usually focus our weekly technical releases on practical assistance for today’s engineers, nothing is more important than understanding how to work safely. As an example of electrical safety procedures, we will discuss the safe working procedures used by HV field technicians – the ‘Seven steps that save lives‘. …

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Dec
15
2017

What are the key things to consider with the stop/start control of AC drives?

STOP/START control of the AC drive// The protection of the mains supply side of the drive requires a short-circuit protection. This can be, either in the form of a set of adequately rated fuses, usually as part of a switch-fuse unit, or a main circuit breaker. The stop/start control of the AC drive can be …

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Aug
10
2017

Which applications are best suited to variable speed drive control?

Energy saving & variable speed drives// Many industrial sectors have discovered the benefits of using variable speed drive (VSD) control in a wide variety of applications. Businesses in the commercial and public sectors can also utilise the benefits of VSDs, largely in applications involving pumps and fans, such as ventilation and air conditioning systems, combustion …

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Jul
06
2017

How do motor speed control methods compare?

Why motor speed control? It is often desirable to control the motor speed, usually for process control reasons for variables such as flow or pressure. Applications such as fans and pumps often have varying output requirements, and control of the motor speed is more efficient than mechanically limiting the process output with devices such as …

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Jun
22
2017

Minimise lost production for your plant with Quantum’s expanding hire fleet of Drives and Motors

Quantum has recently taken delivery of further 800kW and 1.2Mw ABB panels as part of a continued growth strategy throughout 2017, with our hire fleet now made up of: 5kW – 5Mw ABB Drives Voltage supply at 450V, 690V and 3.3Kva IP21, IP54 and IP66 enclosure ratings Hiring a Variable Speed Drive or Motor is …

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Jun
22
2017

What are the most common flow control methods of pumps?

Pump as a part of the process // When in use, the pumps are always part of a pumping system. A pumping system is usually a network of pipes, tanks, valves and other system parts. The receiver is usually at a higher geographic level than the supply of the system. These parts can be also …

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Jun
01
2017

How do I select a suitable VSD for my motor?

Firstly, no drive is of any use without a motor. The motor is selected according to the basic information about the process. Speed range, torque curves, ventilation method and motor load ability give guidelines for motor selection. Often it is worth comparing different motors because the selected motor affects the size of the frequency converter. …

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May
25
2017

What degrees of enclosure protection are provided against ingress of solid objects and liquids?

Enclosure protection (IP) code// As you already probably know, IP stands for Ingress Protection. International Electrotechnical Commission – IEC 60529 “Degrees of protection provided by enclosures (IP Code).”. NEMA offers a similar rating system. In order to protect live parts of equipment being contacted by foreign solid bodies or liquid, and also to prevent persons …

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Apr
06
2017

What are the installation guidelines for AC power drive systems?

Installation guidelines for AC power drive systems (VSDs and motors) Power drive systems (PDS)// Power drive systems (PDS) are used by a number of various standards. They consist of a Complete Drive Module (CDM) and a motor, together with their interconnections, they do not include driven load. In turn the CDM consists of a Basic …

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Feb
16
2017

Why do we care so much about power factor correction?

Power factor improvement // Power factor, as every electrical engineer should know, is defined as the ratio of real power to volt-amperes and is the cosine of the phase angle between the voltage and current in an AC circuit. These are neatly defined quantities with sinusoidal voltages and currents. Power factor can be improved by adding capacitors …

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