Motor Testing

Motor Inspection and Testing

We are always investing in new test equipment to enable us to carry out comprehensive tests on rotating machinery in the workshop as well as on site. Some of the different types of tests that we carry out include:

BAKER TESTING Using BAKER AWAIV-12 TESTER

The Baker AWA Tester integrates a wide range of electrical tests. The instrument supports all major electrical tests in a single field portable unit and complies with IEE recommendations.

In order to test motors adequately and to have effective predictive maintenance programs, we suggest using a specific test sequence.

The general idea is to perform the test sequence as a series of progressively more rigorous tests, accepting the idea that if a test fails, troubleshooting and repair should begin at that time. More rigorous testing should only commence after satisfactory diagnosis and /or repair.

Sequence of testing:

■ Resistance
■ Meg-ohm, polarization index, dielectric absorption
■ Hi pot, ramp voltage, step voltage
■ Surge
■ Output Voltage 0-12000 volts
■ Max Meg-ohm 50000


When testing is complete, results can be saved as part of each motor permanent test record. This kind of documentation is critical to a successful reliability program. Reports can be generated for trending and analysis

The Baker Tester is the most versatile instrument available today and can be an important tool in any PM Program.

THERMAL IMAGING Using THE FLIR 60

Thermal Imaging technology has revolutionised the approach to predictive maintenance. By pro-active early identification of potentially serious faults before they have a chance to fail, infrared thermography prevents sudden and costly disruption to critical operational and production systems by allowing repairs to be scheduled at a time, which is convenient to everyone.

■It reduces down time: There is no need to shutdown operational systems during a thermal audit allowing production to continue as normal. ■It saves money: By early detection of faulty systems or components, remedial work can be planned and conducted before more serious problems or damage occurs which may cause long and unexpected interruptions to vital operational systems. ■It is fast and accurate: Thermal surveys can quickly scan and measure the temperature distribution of entire surfaces of machinery and electrical equipment under normal load conditions quickly and accurately with no need for lengthy preparation or pre-inspection work. ■It is a totally non-invasive process: Thermal Imaging is non destructive and involves no physical contact and consequently there is no potential for damage to the systems or equipment undergoing thermal surveys. ■It reduces the potential for serious health and safety issues to occur: Early detection of problems will reduce the potential for injury to staff and risk of fire. ■It has revolutionised predictive maintenance inspection programs: By detecting problems and scheduling repairs before a major failure occurs, productivity, profitability and workplace safety are .

DYNAMIC BALANCING Using IRD B50-246 INSTRUMENT

Yarmouth Rewinds have dynamic balancing machines to cover a range of balancing components from 1kg to 2300kg and a maximum diameter of 2380mm.

Everything that rotates needs to be in a state of balance to ensure smooth running when in operation.

Dynamic balancing is an essential tool in the repair and maintenance of rotating equipment. It significantly reduces wear and tear and avoids high replacement costs.

Dynamic Balancing can:

■Minimize Vibration: Unbalance is still the major source of machine vibration. ■Minimise Noise: Airborne noise is often directly attributed to mechanical vibration. ■Minimise Structural Stress: The forces produced by unbalance have to be absorbed by the surrounding structure. ■Increase Machine Life: The time between outages can be extended if the machine is running smoothly. ■Increased Bearing Life:Bearings bare the brunt of the unbalanced forces. ■Increase Productivity: Machines running smoothly have a longer service life.

VIBRATION ANALYSIS Using PRUFTECHNIK VIBROCORD

Yarmouth Rewinds Vibration Analysis planned program can observe changes in the condition of all your rotating equipment. Early detection of any problems can allow for a corrective action to be taken before a catastrophic failure occurs. This unique service works on all rotating equipment, pumps, gearboxes, fans and motors. Typical problems that can be located:

■Unbalance
■Bad bearings
■Mechanical looseness
■Worn Gears
■Misalignment
■Electrical problems

Vibration Analysis can pay for itself with:

■Longer Machine Life: Regular checks allow equipment to be operated at a level that will meet or exceed its expected service life. ■Increased Productivity: Knowing the condition of your equipment will enable the scheduling of preventative maintenance. ■Lower Maintenance Costs:Detecting minor conditions and taking appropriate corrective action reduces expensive repair costs and enables you to maintain lower maintenance costs.