Briggs & Stratton 86262GS, Руководство по ознакомлению и устранению неисправностей

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Section 2 • Generator Components & Systems
Portable Generator Familiarization & Troubleshooting Guide
Resistors
Resistors are used to introduce resistance into a circuit,
thereby limiting current flow. Resistance is dependent upon
the length, cross sectional area, and physical properties of a
conductor.These factors are used in the construction of
resistors.
The physical size of a resistor depends on its wattage rating,
not on its resistance value (ohms).
A resistor may have fixed or variable resistance. A fixed
resistor (Figure 2.30) establishes a certain fixed resistance in
the circuit.
A variable resistor is provided with some means of
manipulating the length of the resistor element. One
type of variable resistor is called a potentiometer or
rheostat, which is usually wire-wound.
The amount of resistance provided by the rheostat
(Figure 2.32) can be changed by means of a
moveable wiper arm which varies the number of
turns of wire through which current is permitted to
flow.
Identification Of Resistors
Resistors may be marked with their resistance, tolerance and
wattage values or they may be color-coded. Figure 2.31 and
2.33 shows the method used to color-code a resistor.The
accompanying chart gives the value for each color band.
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Figure 2.30 — Some Typical Fixed Resistors
Figure 2.31 — Resistor Color Bands
Figure 2.33 — Resistor Color Coding
Figure 2.32 — Typical Rheostat