Section 1.1

GENERATOR FUNDAMENTALS

CAPACITIVE REACTANCE:

This condition occurs when current leads voltage (Figure 9). It might be thought of as the ability to oppose change in voltage. Capacitance exists in a circuit when certain devices are ~a) capable of storing electrical charges as voltage increases and (b) discharging these stored charges when the voltage decreases.

Figure 9. Capacitive Reactance

WHAT IS AN "IMPACT PLUS" UNIT?:

The Impact Plus is a computer controlled generator that uses an inverter to create a superior sine wave and maintain a steady frequency. These units are dif- ferent from conventional generators in that the perfor- mance of the engine and AC generator are more accurately matched over a wide range of power needs. The Impact Plus computer controlled genera- tor provides greater efficiency of both the engine and the generator while maintaining electrical output with- in an acceptable voltage range. The frequency is con-

trolled by the inverter and is maintained at a steady 60 Hz signal throughout the load range.

Computer controlled generator units have the ability to operate the engine over a wide range of speeds, while conventional generators will deliver correct AC frequency and voltage only at a fixed rpm.

Unlike conventional AC generators, the Impact Plus unit can match engine speed to load requirements. This provides several advantages, as follows:

Smaller engines can be used to produce more power than on a conventional generator, since it can be allowed to run at a higher speed.

When the load is reduced, the engine can run at slower than the usual speeds. This improves fuel economy and reduces engine noise.

The Impact Plus unit can be operated closer to its peak power point at all times, because output volt- age and current are functions of engine speed. This allows for a much more compact generator design.

IMPACT PLUS SYSTEM OVERVIEW:

Figure 10 is a block diagram of the Impact Plus sys- tem. The major elements of the system are represent- ed in the diagram. Operation of the system may be described briefly as follows:

1.The engine is directly coupled to a permanent magnet type Rotor, so the Rotor runs at the same speed as the engine.

2.As the Rotor turns, its magnetic field cuts across the Stator windings to induce a voltage into the Stator.

Figure 10. Block Diagram of the Impact 36 Plus System

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Generac Power Systems 940-2, 941-2 Capacitive Reactance, What is AN Impact Plus UNIT?, Impact Plus System Overview

941-2, 940-2 specifications

Generac Power Systems has established a strong reputation in the field of backup power solutions, particularly with its innovative products like the Generac 940-2 and 941-2 generator systems. These generators are designed to provide reliable power during emergencies, ensuring that homes and businesses can maintain operations seamlessly when grid power is disrupted.

One of the standout features of the Generac 940-2 and 941-2 models is their robust engine performance. Both generators utilize Generac’s patented engines, known for their durability and efficiency. These engines are built to withstand the most demanding conditions while providing a consistent power output. This reliability is crucial for users who depend on uninterrupted power supply for essential appliances and equipment.

In terms of technologies, the Generac 940-2 and 941-2 are equipped with advanced automatic transfer switch capabilities. This technology allows the generators to automatically start and supply power within seconds of an outage. This quick response time helps to ensure that critical systems remain operational without noticeable interruptions, which is vital for businesses and households alike.

Another important characteristic of these models is their user-friendly interface. The generators come with an intuitive digital controller that provides real-time information on power usage, system status, and maintenance needs. This technology makes it easy for users to monitor their generators and ensure they are always ready for an emergency.

The design of the Generac 940-2 and 941-2 also emphasizes noise reduction and aesthetic appeal. These units are engineered for quieter operation compared to traditional generators, making them suitable for residential areas. Their sleek appearance also fits well with modern home exteriors, enhancing rather than detracting from the property’s visual appeal.

Furthermore, these generators offer flexible fuel options, with the ability to run on natural gas or propane. This versatility allows users to choose the fuel source that best meets their needs, contributing to energy efficiency and lowering overall operating costs.

In summary, the Generac Power Systems 940-2 and 941-2 are exceptional generators that combine powerful performance with innovative technologies. Their automatic transfer switch capabilities, user-friendly controls, noise reduction features, and flexible fuel options make them an excellent choice for anyone seeking reliable backup power solutions. With these generators, users can rest assured knowing they have a dependable energy source ready when they need it most.