On any job site, having the right electrical safety gear is essential. For electrical projects, there are often special considerations, as some tasks can have unique hazards that require special gear.

Eye injuries are serious and for most electricians are a daily hazard. Having, and using, the right eye protection can make all the difference.

Electricians often work at heights, either on roofs, scaffolds, or elevated work platforms. In some locations, even working on a step ladder can require fall protection gear.

When the potential exists to fall more than 6 ft., fall protection gear should be worn. This includes an approved and inspected harness and a lanyard with the correct weight rating. Always ensure that the fully extended length of the lanyard is short enough to prevent the worker from contacting the ground in the event of a fall.

Hand injuries are the most common type of workplace injury, therefore selecting and using the right kind of gloves is vital.

Along with proper knife safety practices, using cut-resistant Kevlar gloves can greatly reduce the potential for cuts and scratches. In cold weather, ensure that insulated gloves are worn. When dealing with potentially hazardous chemicals, use gloves rated to handle the specific associated hazards.

The controller keeps on monitoring the application requirement in a continuous control loop. It then commands the inverter to produce the required voltage and frequency to meet the application requirements. To do this, the controller, comprised of a microprocessor, takes the input signal from the sensor and compares this with a reference signal. It then generates the appropriate control signal for the inverter to vary its output power.

In a typical application, the controller will monitor process parameters such as pressure, flow rate, temperature or liquid level. For example, an oxygen sensor in a boiler provides a signal to adjust the speed of the fan and control the amount of oxygen in the boiler system.

Today’s drives, using microprocessors, semiconductor power switches, and SMDs are now smaller, compact, cheaper, more reliable and efficient. A typical drive will also include a filter to suppress harmonics generated when converting the DC to AC voltage.