Troubleshooting guide

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Multiquip Inc. ◦ DCA Generators Troubleshooting Guide ◦ Manual No. DCATRBLSHOOT
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Ammeter
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An instrument that measures electric current in amperes.
Amperage (Amps) - The strength of a electrical current measured in amperes.
Armature - That part of a generator or of an electric motor in which a current is induced by a
magnetic field. The armature usually consists of a series of coils or groups of insulated
conductors surrounding a core of iron. See page 8 for more information.
Automatic Voltage Regulator (AVR) - Increases or decreases exciter current for a more linear
voltage and frequency. See open delta page 30 for more information.
Brushless Design - The purpose of the generator brush is to absorb power from the rotating
armature of a generator and supply it to the stationary part of the generator. These brushes
have a short life due to erosion. Multiquip’s unique brush less design calls for lower
maintenance and a longer generator life. See open delta page 30 for more information.
Circuit Breaker (CB) - Connects and disconnects the generator output from the output
terminals. It also protects the generator from short circuits or overloads.
Exciter Armature - The exciter armature or just the "exciter", generates electricity which is
used for excitation of the field coil. The field coil makes the magnetic field required to generate
electricity, which is used for the generators main power output.
Frequency - Frequency is the number of complete cycles per second in alternating current
direction. The standard unit of frequency is the hertz, abbreviated Hz. If a current completes
one cycle per second, then the frequency is 1 Hz; 60 cycles per second equals 60 Hz
Ground Fault Interrupters (GFI's) - These devices are designed to eliminate electrical shock
hazard resulting from individuals coming in contact with a hot AC line. The circuit interrupter is
designed to sense any change in circuit conditions. It is required by the NEC that all 12 volt,
single phase, 15- or 20 ampere receptacle outlets that are installed outdoors or in bathrooms
have ground fault interrupters connected to them
Heat Rise - Is in direct relation to the longetivity of the generator. To find out why Multiquip
units exceed the competition, see page 27
KVA – Kilo Volt Amp which sizes three phase loads can be converted to Kilowatts by
multiplying the KVA by the power factor 0.8
NEMA - National Electrical Manufacturers Association: For more information about NEMA and
their standards, visit their website at http://www.nema.org/.
Ohm - A unit of electrical resistance equal to that of a conductor in which a current of one
ampere is produced by a potential of one volt across its terminals.