MOTOR START ANALYSIS IN AUSTRALIA

Care Labs offers a specialized Motor start study and analysis service to companies all over Australia. Our service can assist in determining the best method of starting, the proper motor design, and the appropriate system design for mitigating the effect of motor starting while adhering to the Australian Standard AS 60034.

The main objective of our motor start analysis service is to assess the unusual implications of starting a large motor. Beside successfully linking the electric motor to the line voltage, there are various factors to remember before starting an electric motor like nuisance tripping, excessive nominal currents, as well as flickering or dimming of light are indicates that a power system isn’t functioning correctly.

Care Labs will deploy trained experts at your location to gather current and historical data of the motor installation. Then, using the obtained data and input from the manufacturer, calculations are conducted to forecast the future consequences, and solutions are proposed to minimize the effects.

Motor starting techniques can be analysed using both static and dynamic simulation approaches. We mainly focus on the dynamic motor starting studies that mimic the starting conditions of motor such as:

To obtain the load flow solution, the observed starting impedance of the electric motor is modelled.
Short-circuit method calculations are used for pre-fault short circuit situations, and voltage drop calculations are used for motor starting currents.
The dynamic model of the electric motor can be used in a standard transient stability algorithm to calculate the effect of motor starting when a precise dynamic model of the electric motor circuit and load-torque characteristics exists.
Transient stability simulations can be used when comprehensive dynamic model information of the electric motor is unavailable.

Need for Motor Start Analysis in Australia:

The use of motors in today’s industrial systems is growing exponentially and so is the size of the electric motor.

Starting a large motor connected to the line may cause severe disruptions to the electric motor, to the locally attached loads, and to the buses that are electrically distant from the motor’s starting point.

For starting an electric motor, the voltage at the motor terminal should be maintained at a minimum of 80% of the rated voltage or higher. Since the square of the motor terminal voltage is directly proportional to the load torque of a motor, voltage difference has a direct impact on the motor’s load torque characteristic.

If the voltage drop is extreme, the loading on the running machines can exceed their breakdown torque, causing them to decelerate significantly or even stall. The voltage drop also affects other types of loads, such as electronic devices, sensitive control devices, lighting loads, and so on.

Further, excessive starting current causes a decrease in terminal voltage, which can lead to an increase in the current drawn by all systems serving a continuous load. Malfunctioning of Undervoltage relays is also observed.

When to Get a Motor Start Analysis Done:

On or before purchasing a large motor.
If no generator is present and the motor rating exceeds 30% of the supply transformer’s base KVA rating.
If the system is fed alone by the generator and its motor rating exceeds by 10-15% of the generator’s KVA rating.
If a large number of motors are starting at the same time for a process in an industry, a motor start study could be required.
Smaller power systems typically have limited capacity, which magnifies voltage drop issues when starting a high-capacity motor. The analysis of motor starting helps understand the output of small systems that include generators.

Benefits of Motor Start Analysis:

Motor start analysis is helpful to select a motor or a starting method, or both with the best speed-torque characteristics for the operation.

Any special loads must be accelerated under closely monitored conditions to avoid reaching the equipment’s torque limits. By performing a motor start analysis, it is possible to analyse the shaft operation of the motor at any instant. Thus, helps to evaluate the equipment’s permissible torque limits.

Motor starting studies are critical for determining the impact on machine voltage during starting and determining whether or not the electric motor can start and come up to speed satisfactorily. Care Labs offers motor start study services performed by experienced professionals to help evaluate the condition of your electric motor better.

We offer motor start analysis services in all the major cities of New South Wales, Queensland, South Australia, Tasmania, Victoria and Western Australia.

Book your motor starting study today or get a quote by contacting us!