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Summary (TL;DR) In a permanent delta connection each winding is exposed to the line-to-line voltage; a 230/400 V motor runs in delta on a 230 V supply. For a 400/690 V motor, delta... More Details

When you read an efficiency value such as "IE3 93.0%" or "IE4 95.4%" on the nameplate of a high-efficiency motor, exactly what that figure means and how binding it is a critical ma... More Details

When you see a code such as "6312 C3" on a motor nameplate or on the bearing itself, the C3 at the end is not a random letter; it defines the internal clearance (radial internal cl... More Details

When you open the terminal box on an IE5 synchronous reluctance motor, you often see another separate and usually smaller box next to the main power terminals: the second or auxili... More Details

When you open the terminal box of an IE4 super premium motor, you are met with three winding starts (U1-V1-W1) and three winding ends (U2-V2-W2). The bridging you use to join these... More Details

Lifting a cast-iron motor is not as harmless a task as bolting on a cable or reading the nameplate. When you raise a cast-iron body that can weigh from a few hundred kilograms to w... More Details

Samsun, the industrial heart of the Black Sea, brings together a wide production range from food to wood, from mining to shipbuilding and agricultural machinery. This diversity cre... More Details

For an OEM that mass-produces, a plant that continuously consumes motors, or a machine builder expecting planned shipments throughout the year, the biggest risk is not the motor it... More Details

When ordering an electric motor there is one parameter as critical as power, speed and efficiency class, and it often comes to mind last: the mounting type. The mounting code (IM c... More Details

Selecting an electric motor by looking only at its power (kW) and speed (rpm) is often a half decision. Because what really determines whether the motor can carry the load, whether... More Details

In boiler rooms, steam plants and central hot-water systems there is one component that is easy to overlook yet directly determines the continuity of the line: the condensate (retu... More Details

Star-delta starting is the most common and most economical method of reducing the starting current on asynchronous motors. The motor is first connected in star, keeping current and... More Details

When you look at a motor's nameplate, you easily read its power, speed, current and efficiency class; but especially on a motor built to the NEMA standard, the single letter next t... More Details

When you run an IE5 synchronous reluctance motor at very high speed continuously, for example on a turbo blower, a high-speed compressor or a test bench, the most stressed part is ... More Details

When commissioning an IE4 super premium efficiency motor in a dusty environment, most engineers focus on the efficiency class, winding quality and bearing life; but they rarely loo... More Details

When moving a large cast iron asynchronous motor from the factory to the field, one thing is often overlooked: throughout the long transport period when the motor is not running an... More Details

In a crusher (stone-crushing) plant, the main crusher motor is the heart of the entire line. When this motor stops, not only the crusher but the whole feeder, conveyor and screeni... More Details

On an IE3 motor running in high-power and critical applications, measuring winding and bearing temperature at only one point is not sufficient. Different regions of the motor heat... More Details

One of the most insidious faults of an asynchronous motor is an earth (frame) leakage. When the winding insulation degrades over time due to moisture, heat, vibration or contamina... More Details

When a machine needs to run at two different speeds, the first solution that comes to mind is a variable frequency drive (VFD). However, if only two fixed speeds are sufficient an... More Details