We have compiled a list of commonly used terms for used diesel generators and surplus diesel generators.
We hope you find this information useful and if you have any questions give us a call at 208-262-9875.
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GLOSSARY OF COMMONLY USED GENERATOR PARTS AND TERMS
- Alternating Current (AC)
- An electric current which changes direction with a regular frequency
- An electric generator that produces an alternating current, which uses rotating parts to change the magnetic field to the alternating current.
- Ambient Temperature:
- The surrounding air temperature of the diesel generator in any giving area
- Is the strength (intensity) of an electrical current, which is measured in amperes, commonly referred to as (AMPS)
- Named after the French physicist Andre M. Ampere. An ampere is a type of electric current produced by one volt applied across a resistance of one ohm.
- Apparent Power
- Measured in “volt amperes” and is often express in “kilovolt amperes” (kVA). It is the product of voltage, (volts) and the current (amperes), it is both active and reactive power.
- Backup Generator or Genset
- A generator used as emergency power back up. The best line of defense for a power outage.
- Is a group of usually two or more cells that are connected together to provide an electrical current.
- Battery Charger
- A generator battery charger is different than the battery charger in your vehicle. A generator battery charger is designed to maintain and supply a constant float voltage to the battery to optimize the life of the battery.
- Battery Charge Rectifier
- The rectifier converts AC voltage to DC voltage to charge the battery.
- Refers to the sudden loss of all electrical power.
- Black Start
- This refers to the starting of the generator by way of its own power source with out any external power supply.
- Is the commonly used term in the industry, which refers to the reduction of voltage or power when the demand for the electricity exceeds capacity.
- Consists of either graphite or copper conducting elements, which maintains the sliding electrical contact between the static and moving element.
- Is a device used in a generator to convert or “switch” the alternating current that the generator produces into a direct current before the current is sent to an external circuit.
- A device that uses a small control current to energize or de-energize the load. The contactor is designed to handle high amounts of current and are combined with overload relays
- Is comprised of laminations in the generator that constitute the magnetic structure.
- Is often revered to the metal frame or cover enclosing the generator or engine, to provide protection from external interferences.
- The rate that electricity flow
- DC Generator
- A generator that transforms mechanical energy into D-C electric energy
- Decibel Level (DB)
- Used in the industry to define noise level
- Delta Connection
- Delta connection is a three-phase connection where the beginning of each phase is connected to the end of the next phase.
- It is an electrical component with two active terminals called an anode and a cathode. It allows the current to pass in only one direction. In addition it converts AC power to DC power.
- Direct Current
- Is an electrical current that flows only in one direction.
- Is simply an electric generator that produces a direct current.
- Emergency Power
- Commonly referred to as the “generator”. Emergency power is needed when there is a loss of electricity to a building or facility. The generator(s) supplies the “emergency power” to maintain operations which could potentially save companies millions of dollars and save the lives of those involved with a power outage, for example the patients and personnel in a hospital.
- Enclosure (AKA Housing)
- There are two common types of enclosures
1) Sound Attenuated – A sound attenuated enclosure or is an enclosure that is baffled or insulated to reduce the noise made from the generator.
2) Weather Enclosure – A metal enclosure that is not sound- proofed but is used to keep the outside elements from interfering with the normal operations of the generator.
- Is known as an auxiliary generator, that provides power or electrical current to a larger generator.
- Is the number of complete cycles of the alternating voltage per second. Typically referred to as hertz (Hz)
- Frequency Regulation
- Measures the difference between a non-load and a full-load frequency as a percentage of the full-load frequency.
- Fuel Cell
- A non-combustible device that converts the energy of a fuel to electricity or heat.
- Full Load
- Is the maximum load of a generator of circuit. Any additional load would be considered an overload.
- A machine that converts mechanical energy into electrical energy.
- A commonly used term for generator (see Generator)
- Green Energy
- Is the production of electricity from renewable resource such as solar, wind and geothermal. Green electricity is non-polluting.
- The Commercial Utility’s electrical system used for supplying power.
- Hertz (Hz)
- Cycles per second commonly referred to as frequency. North America runs 60 Hz.
- Idle Control
- A device that the controls the idle speed of an engine in direct relation to an electrical load.
- Ignition Coil
- The ignition coil is device that supplies DC voltage to the spark plugs.
- Inrush Current
- Is the immediate input current by a power supply when it is first turned on.
- The non-conductive material used to prevent the escape of the electric current from a conductor.
- Changes DC power to AC power. Also known as a power converter.
- Kilo-volt-amperes (kVA)
- kVA is an electrical term used to rate electrical devices. 1,000 Volt Amperes.
- Kilowatt (kW)
- An alternate term for rating electrical devices. 1,000 watts
- Is the phase winding of a generator.
- Is the amount of electric power that various devices demand from the electricity generator system.
- Load Factor
- The ratio derived from the average load to the generator power rating.
- Main Breaker
- Is the main circuit breaker at either the input or output of the bus, of which all the bus power must flow.
- Manual Bypass Switch
- Is a switch that is manually operated to bypass electrical components in an Uninterruptible Power Supply (UPS), so work can be done with out power interruption.
- Megawatt (MW)
- One million watts of power or electricity.
- National Electrical Code (NEC)
- Is the National Electrical Contractors Association. (NECA)
- Is the National Electrical manufactures Association (NEMA)
- Natural Gas Generator: A generator that runs on Natural Gas and/or Propane
- Used Natural Gas Generators: A used natural gas generator can save our clients time and a lot of money.
- Is a unit of electrical resistance.
- Is the device used to measure electrical reistance.
- On Set Paralleling
- Manuel paralleling systems that is built onto the generator.
- A feature with most generators that displays an alarm when the generator fails to start.
- Power Distribution Unit (PDU)
- A device that monitors and controls the distribution of power to other loads.
- Peak Load
- Is the maximum kW demand of a facility.
- Peak Shaving
- Is when a facility reduces it’s electrical demand from the utility by using the back up generator during high demand times.
- Power Factor
- The ratio between the real power, kW and the apparent power, kVA in a circuit. The standard power factor is shown as a percentage (.8) or 80%.
- Reactive Power
- Is the energy movement in an Alternating Current (AC) arising from the production of electric and magnetic fields.
- Is and electrical device that converts AC power to DC power.
- Is the rotating element of a generator or motor.
- Is Revolutions Per Minute (RPM)
- Single Phase
- Is an Alternating Current having two input terminals and two output terminals. Single phase is often referred to as 110/220 volt or120/240 volt.
- Is the stationary part of a generator or motor. The direct opposite of a Rotor (see rotor)
- A sudden variation in frequency, current or voltage
- The matching of one wave to the other by adjusting the phase angle and frequency until the two coincide.
- Synchronous Generator
- Is an AC generator having a DC exciter.
- An instrument that measures rotational speeds of a shaft or disk, usually displayed as RPM’s.
- Transfer Switch
- Transfers the load from the original source, usually the utility, to the back up generator if the original source has failed.
- A device commonly used to decrease or increase the voltage from the generator to match the facilities voltage.
- Underwriters Laboratories (UL listed)
- A non-profit, independent testing and certification organization.
- Your commercial power source. Your local “Utility” company.
- Used Diesel Generators
A good used diesel generator can save our clients time and a lot of money.
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- Your #1 on source for high quality used diesel generators and natural gas generators.
- The unit used for measuring the true total electric power.
- Represents all the coils of a generator.