Generac Power Systems 5410, 5412, 5411 Meters, Vom, Measuring AC Voltage, Measuring DC Voltage

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Section 4

MEASURING ELECTRICITY

Meters

Devices used to measure electrical properties are called meters. Meters are available that allow one to measure (a) AC voltage, (b) DC voltage, (c) AC frequency, and (d) resistance in ohms. The following apply:

❏To measure AC voltage, use an AC voltmeter.

❏To measure DC voltage, use a DC voltmeter.

❏Use a frequency meter to measure AC frequency In “Hertz” or “cycles per second”..

❏Use an ohmmeter to read circuit resistance, in “ohms”.

The VOM

A meter that will permit both voltage and resistance to be read is the “volt-ohm-milliammeter” or “VOM”.

Some VOM’s are of the “analog” type (not shown). These meters display the value being measured by physically deflecting a needle across a graduated scale. The scale used must be interpreted by the user.

“Digital” VOM’s (Figure 4-1) are also available and are generally very accurate. Digital meters display the measured values directly by converting the values to numbers.

NOTE: Standard AC voltmeters react to the AVERAGE value of alternating current. When working with AC, the effective value is used. For that reason a different scale is used on an AC voltmeter. The scale is marked with the effective or “rms” value even though the meter actually reacts to the average value. That is why the AC voltmeter will give an incorrect reading if used to measure direct current (DC).

Figure 4-1. – Digital VOM

Measuring AC Voltage

An accurate AC voltmeter or a VOM may be used to read the generator’s AC output voltage. The following apply:

1.Always read the generator’s AC output voltage only at the unit’s rated operating speed and AC frequency.

2.The generator’s voltage regulator can be adjusted for correct output voltage only while the unit is operating at its correct rated speed and frequen- cy.

3.Only an AC voltmeter may be used to measure AC voltage. DO NOT USE A DC VOLTMETER FOR THIS PURPOSE.

*DANGER!: RV GENERATORS PRODUCE HIGH AND DANGEROUS VOLTAGES. CONTACT WITH HIGH VOLTAGE TERMINALS WILL RESULT IN DANGEROUS AND POSSIBLY LETHAL ELECTRICAL SHOCK.

Measuring DC Voltage

A DC voltmeter or a VOM may be used to measure DC voltages. Always observe the following rules:

1.Always observe correct DC polarity.

a.Some VOM’s may be equipped with a polarity switch.

b.On meters that do not have a polarity switch, DC polarity must be reversed by reversing the test leads.

2.Before reading a DC voltage, always set the meter to a higher voltage scale than the anticipat- ed reading. If in doubt, start at the highest scale and adjust the scale downward until correct read- ings are obtained.

3.The design of some meters is based on the “cur- rent flow” theory while others are based on the “electron flow” theory.

a.The “current flow” theory assumes that direct current flows from the positive (+) to the nega- tive (-).

b.The “electron flow” theory assumes that cur- rent flows from negative (-) to positive (+).

NOTE: When testing generators, the “current flow” theory is applied. That is, current is assumed to flow from positive (+) to negative (-).

Measuring AC Frequency

The generator’s AC output frequency is proportional to Rotor speed. Generators equipped with a 2-pole Rotor must operate at 3600 rpm to supply a frequency of 60 Hertz. Units with 4-pole Rotor must run at 1800 rpm to deliver 60 Hertz.

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Contents Diagnostic Repair Manual Safety Table of Contents Section Electrical Data 78-79 Electromagnetic Induction MagnetismElectromagnetic Fields More Sophisticated AC Generator Simple AC GeneratorGenerator Operating Diagram Generator AC Connection System Field BoostConnection for 120 Volts Only Stator Assembly Rotor AssemblyExcitation Circuit Components Brush HolderDescription Crankcase BreatherControl Panel Components Control Panel Component IdentificationEffects of Dirt and Moisture Cleaning the GeneratorInsulation Resistance Testers Drying the GeneratorStator Insulation Resistance Testing Stator Insulation Testing Rotor InsulationTesting Rotor Insulation MegohmmeterVOM MetersMeasuring AC Voltage Measuring DC VoltageMeasuring Resistance Measuring CurrentOhm’s Law Electrical UnitsOperational Analysis IntroductionCircuit Condition Cranking Circuit Condition Running Circuit Condition Shutdown Recommended Battery BatteryBattery Cables Printed Circuit BoardAmp Fuse Start-Stop SwitchStarter Contactor Relay Starter Motor Start-Stop SwitchProblem 1 Voltage & Frequency Are Both High or Low If Problem Involves AC OutputTest Troubleshooting Flowcharts Proble 5 Priming Function Does Not Work Gasoline Models Problem 6 Engine Will Not Crank Test 26 Check Test 20 Check Check Fuel Wire 14 Power Good Troubleshooting Flowcharts Problem 8 Engine Starts Hard and Runs Rough Gasoline Units Problem 8 Engine Starts Hard and Runs Rough LP Units LOW OIL Pressure Flashes on SW1 LED YES Problem 10 7.5A F1 Fuse BlowingTest 1 Check No-Load Voltage Frequency ProcedureTest 2 Check Stepper Motor Control DiscussionTest 4 Fixed Excitation Test/Rotor Amp Draw Six Pin J2 Connector Wire ColorsFixed Excitation Test, Step B Test 6 Test Stator DPE Winding Test 5 Check Field BoostStator Excitation Winding Test 7 Check Sensing Leads / Power WindingsTest 8 Check Brush Leads Stator Power Winding LeadsTest 9 Check Brushes & Slip Rings Test 10 Check Rotor AssemblyTest 11 Check Main Circuit Breaker SchematicTest 12 Check Load Voltage Frequency Test 13 Check Load Watts AmperageTest 15 Check Fuel Pump Test 14 Try Cranking the EngineTest 16 Check 7.5 Amp Fuse Test 17 Check Battery & CablesTest 18 Check Power Supply to Printed Circuit Board Test 20 Check Start-Stop Switch Test 19 Check Continuity of WireTest 22 Check Starter Contactor Relay Test 21 Check Power Supply to WireTest 24 Check Starter Motor Test 23 Check Starter ContactorTools for Starter Performance Test Checking the PinionPinion Minimum rpm 4500 Maximum Amps To Carburetor GAS Test 25 Check Fuel Supply29. Fuel Regulator Test 26 Check Wire 14 Power SupplyTest 28 Check Fuel Solenoid Gasoline Models Test 27 Check WireTools RequiredTwo Ignition Testers Generac P/N 0C5969 Test 29 Check Ignition SparkTest 30 Check Spark Plugs Test 31 Check and Adjust Ignition Magnetos37. Setting Ignition Magneto Armature Air Gap Flywheel KEY Test 32 Check Valve AdjustmentChecking Flywheel Magnet Test 34 Check Choke Solenoid Test 33 Check CarburetionSolenoid Panel To ControlTest 36 Check Oil Pressure Switch Test 38 Test Oil Temperature Switch Test 37 Check Wire 86 for ContinuityTest 40 Test Choke Heater Test 39 Check Wire 85 for ContinuityTest 41 Check LPG Fuel Solenoid Section Exploded Views QTY Description Enclosure Drawing No G3881-C Enclosure Door Views Screw Plastite HI-LOW #10X3/8 Engine Accessories Drawing No G7718-B QTY Description 48,49 Square Head Plug Rotor & Stator Drawing No G3953-b NUT TOP Lock FL M8-1.25 Charts Nominal Resistances of Generator Windings at 68f Generator SpecificationsElectrical Data Electrical Data OG7515 REV. a

5410, 5414, 5415, 5413, 5411 specifications

Generac Power Systems has established itself as a leading manufacturer of backup power solutions, particularly known for its range of generators designed for both residential and commercial use. Among their noteworthy products are the Generac models 5412, 5411, 5413, 5415, and 5414. Each of these generators showcases innovative technologies and features that enhance reliability, efficiency, and ease of use.

The Generac 5412 is a versatile model equipped with a robust 10 kW output, making it suitable for powering essential home appliances during outages. It operates using a 1.0 L engine that runs on natural gas or propane, providing flexibility in fuel options. The Quiet-Test feature is a notable characteristic, as it allows for a self-test at a reduced volume, minimizing noise disruptions during routine checks.

Moving to the Generac 5411, this generator offers a higher output capacity of 13 kW. It integrates advanced load management technology, which ensures that power is allocated efficiently among connected devices. This model also features a Mobile Link remote monitoring system, enabling users to check generator status and performance from anywhere via a smartphone app.

The Generac 5413 is tailored for larger residential needs, delivering an impressive 16 kW output. It boasts a durable all-weather aluminum enclosure designed for longevity against the elements. The 5413's integrated wifi connectivity allows for real-time monitoring and alerts, ensuring that homeowners are always informed of their generator's operating status.

For those seeking a balance of power and efficiency, the Generac 5415 offers 20 kW of output while maintaining a compact design. This model is enriched with the patented G-Flex technology, allowing it to adjust engine speed based on the load requirements, thereby conserving fuel and reducing noise levels. Additionally, the 5415 comes with an intuitive user interface for effortless operation and programming.

Finally, the Generac 5414 rounds out the lineup with its strong 24 kW capability. This model is particularly known for its Smart Management modules, which facilitate the safe and efficient distribution of power. Its intuitive design also includes a user-friendly control panel for straightforward operation, ensuring that homeowners, regardless of technical expertise, can utilize the system effectively.

In summary, Generac Power Systems’ 5412, 5411, 5413, 5415, and 5414 generators exemplify advanced power technology, tailored for reliability and user convenience. Whether for essential home functions or more extensive power needs, these models provide effective solutions to ensure that homes remain powered during outages.
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