Guardian Technologies 4451 & 4986, 4582 & 4987, 4583 162, Voltage Regulator, Underfrequency Adjust

Page 13

Section 3

DESCRIPTION & COMPONENTS

162

2

Figure 3-5. – Excitation Circuit Breaker

VOLTAGE REGULATOR:

Atypical Voltage Regulator is shown in Figure 3-6 (12.5 & 15 kW Units) or Figure 3-7 (17.5 kW Units). Unregulated AC output from the stator excitation winding is delivered to the regulator’s DPE termi- nals, via Wire 2, the Excitation Circuit Breaker and Wire 162, and Wire 6. The Voltage Regulator recti- fies that current and, based on stator AC power winding sensing, regulates it. The rectified and regulated excitation current is then delivered to the rotor windings from the positive (+) and negative (-) regulator terminals, via Wire 4 and Wire 0. Stator AC power winding “sensing” is delivered to the reg- ulator “SEN” terminals via Wires 11S and 44S.

The regulator provides “over-voltage” protection, but does not protect against “under-voltage”. On occur- rence of an “over-voltage” condition, the regulator will “shut down” and complete loss of excitation current to the rotor will occur. Without excitation current, the generator AC output voltage will drop to approximately one-half (or lower) of the unit’s rated voltage.

Figure 3-6. – Typical Voltage Regulator Found on 12.5

kW and 15 kW Units

Figure 3-7. – Typical Voltage Regulator Found on 17.5

Units

ADJUSTMENT PROCEDURE (12.5 and 15 kW Units):

The Voltage Regulator is equipped with three light emitting diodes (LED’s). These LED’s are normally on during operation with no faults in the system The RED regulator LED is on when the regulator is on and functioning. The Yellow sensing LED is powered by sensing input to the regulator from the stator AC power windings. The GREEN excitation LED is pow- ered by stator excitation winding output.

Four adjustment potentiometers are provided. They are VOLTAGE ADJUST, GAIN, STABILITY, and

UNDERFREQUENCY ADJUST.

1.Connect an AC Voltage/Frequency meter across wires 11 & 44 at the 50A Main circuit breaker. Verify frequency is between 59-61Hz.

2.On the regulator, set the adjustment pots as follows.

a.Voltage Adjust – Pot-turn fully counterclockwise

b.Gain – turn to midpoint (12 O’clock)

c.Stability – turn to midpoint (12 O’clock)

d.Under Frequency – turn to midpoint (12 O’clock)

3.Start the generator. This adjustment will be done under a no- load condition.

4.Turn the regulator’s Voltage Adjust pot clockwise to obtain a line to line voltage of 238-242 VAC.

5.If the red regulator LED is flashing, slowly turn the stability pot either direction until flashing stops.

ADJUSTMENT PROCEDURE (17.5 kW Units):

A single red lamp (LED) glows during normal opera- tion. The lamp will become dim if excitation winding AC output diminishes. It will go out on occurrence of an open condition in the sensing AC output circuit.

An adjustment potentiometer permits the stator AC power winding voltage to be adjusted. Perform this adjustment with the generator running at no-load, and

Page 11

Page 12 Page 14
Image 13
Page 12 Page 14
Contents Diagnostic Repair Manual Replacement Parts SafetyTable of Contents Section Disassembly and Exploded Views 66-71 Electromagnetic Fields MagnetismElectromagnetic Induction Simple AC Generator STATORs AC power windingsMore Sophisticated AC Generator Generator Operating Diagram Measuring AC Voltage MetersVOM Measuring DC VoltageMeasuring Resistance Measuring CurrentOhms Law Electrical UnitsIntroduction AC Generator Rotor AssemblyEngine-Generator Drive System Brush Holder and Brushes Stator AssemblyOther AC Generator Components Excitation Circuit Breaker162 Underfrequency AdjustVoltage Regulator Field Boost Circuit Rotor Residual MagnetismOperation Megohmmeter Insulation ResistanceStator Insulation Resistance Test Test Between Windings Testing ALL Stator Windings to GroundRotor Insulation Resistance Test Cleaning the GeneratorDrying the Generator Recommended Battery BatteryPrinted Circuit Board Circuit Board ConnectionsENGINE DC CONTROL Control Panel Component IdentificationC2 Female Side C2 Male Side C1 Female Side C1 Male SideTerminal Block Terminal BLOCKTB2 TB1 Page Circuit Condition Rest = 12 VDC Control Circuit Condition Start IM1 SP1 IM2 SP2 RED Black Battery Circuit Condition RUN = Idle Control Transformer Output CIRcUIT Condition Stop Fault Shutdown Problem 1 Voltage & Frequency Are Both High or Low If Problem Involves AC OutputIntroduction Or Replace If BAD Load Watts Problem 5 No 10A Battery Charge Output Problem 4 No Battery Charge OutputProblem 6 Engine Will Not Crank Problem 7 Engine Cranks But Will Not Start Problem 9 Engine Starts Then Shuts Down Problem 8 Engine Starts Hard and Runs RoughProblem 10 10 Amp Fuse F1 Blowing Problem 12 Idle Control RPM Does Not Decrease Problem 11 Unit OverspeedsProblem 14 Engine Hunts / Erratic Idle Test 1 Check No-Load Voltage Frequency ProcedureTest 2 Check Main Circuit Breaker ResultsIf circuit breaker is good, go on to Test Test 4 Fixed Excitation Test Rotor AMP DrawSet voltmeter to measure AC voltage Refer to Test 4 Results chart AC Voltage across Wires 11S and 44S=Set a voltmeter to measure resistance Remove air cleaner cover to access stepper motorTest 7 Check Field Boost Test 6 Wire ContinuityTest 8 DIODE/RESISTOR Disconnect both wires from the Resistor R1Set volt meter to the diode test range Set volt meter to measure resistanceTest 9 Test Stator From the 50 Amp receptacle disconnect WireTest 10 Sensing Leads Unplug the six pin connector at the Voltage RegulatorGain access to the brushes and slip rings Test 11 Excitation WiringTest 12 Check Brush Leads Test 13 Check Brushes & Slip RingsTest 15 Check Load Voltage Frequency Test 14 Check Rotor AssemblyTest 16 Check Load Watts & Amperage If the unit is overloaded, reduce the loadTest 19 Check Battery Charge Rectifier BCR2 Test 17 Check Battery Charge OutputDisconnect all wires from the Battery Charge Rectifier Test 21- Check 10 Amp Fuse Test 22- Check Battery & CablesBCR1BCR2 Test 23 Check Voltage at Starter Contactor SC Refer back to flow chartTest 24 Check Starter Contactor SC Test 25 Check Starter MotorTools for Starter Performance Test Checking the PinionSet voltmeter to measure DC voltage Test 26 Test Starter Contactor Relay SCRTest 28 Check Start-Run-Stop Switch SW1 Wiring Test 27 Check Start-Run-Stop Switch SW1Reconnect all wires to the switch Procedure Set voltmeter to measure resistanceTest 29 Check Ignition Spark Refer back to the Flow ChartTest 30 Check Spark Plugs Refer to Flow Chart Test 31 Remove Wire 18 / Shutdown LeadSSR and the Battery Charge Rectifier 2 BCR2 Test 32 Test Start Stop Relay SSRRUN Test 33 Test WireTest 35 Check and Adjust Ignition Test 34 Test Start Stop Relay WiringMagnetos Test 37 Test Fuel Shutoff Solenoid Voltage Test 36 Test Fuel Shutoff Solenoid FSSTest 38 Check Fuel Pump MagnetoAdjusting Valve Clearance Test 40 Valve AdjustmentTest 39 Check Carburetion 52 Tightening the Jam Nut Adjust the regulated pressure on the gauge to 80 psiTest 43 Check Start Stop Relay SSR Test 42 Check Oil Pressure Switch WireTest 46 Check Wire 14 Circuit Test 45 Check Wire 15 CircuitTest 44 Test Starter Contactor Relay SCR Test 47 Check Fuel Shutoff SolenoidTest 49 Check Wire 15B Test 50 Check WireTest 51 Check Wires 11S & 44S Test 48 Check HourmeterTest 53 Check Idle Control Wiring Test 52 Check Idle Control SwitchSW2 TB2Test 54 Check Idle Control Transformers ICT Test 55 Check TR1 & TR2 WiringContinuity should be measured Test 56 Choke TestRemove air deflector Figure B, Item #45 from cross member Major DisassemblySupport Alternator 3317 3026 20 22 25 QTY Description Detail of Battery Tray QTY. Description ELECTRICAL DATA RED Battery Charge Winding BA Brush Assembly Governor Actuator 167 229 15B Power Winding DPE Winding SCR Wiring Diagram 17.5 kW Drawing No G0731 Stator Closest to Bearing Electrical Schematic 17.5 kW Drawing No G0733 Circuit 11 ORG Circuit 13 DRK BLU Circuit 15 PNK ELECTRICAL DATA Page Load % Rated Max DC Load Amperes Current @ 12 VoltsFrequency Hz 238-242 59-61 100 Trim Torque Specifications Torque SpecificationsPO BOX 297 WHITEWATER, WI

5308, 4583, 4451 & 4986, 4582 & 4987 specifications

Guardian Technologies has carved a niche in the market with its innovative air purification and UV-C sanitization products. The company's model numbers, including 4582, 4987, 4451, 4986, 4583, and 5308, represent a diverse range of solutions designed to enhance indoor air quality and safety in both residential and commercial settings.

The Guardian Technologies 4582 is equipped with a true HEPA filter that captures 99.97% of dust, pollen, smoke, and other particles as small as 0.3 microns. This model features a smart sensor that adjusts the fan speed according to the air quality in real-time. The UV-C light technology integrated into this device works to eliminate viruses and bacteria, providing an additional layer of protection against airborne pathogens.

The 4987 model follows suit with similar advanced features but adds a sleek design ideal for modern interiors. With multiple speed settings and a night mode, the 4987 is perfect for bedrooms or quiet spaces. Its energy-efficient operation coupled with an indicator that signals filter replacement ensures that users maintain optimal performance effortlessly.

The Guardian Technologies 4451 and 4986 models are particularly notable for their enhanced capacity and filtration efficiency. Both units incorporate a three-in-one filtration system that includes a pre-filter, activated charcoal filter, and HEPA filter. With their strategic design, these models not only purify the air but also trap common household odors, making them a popular choice for families with pets.

The 4583 model stands out with a unique combination of design and functionality. It features a low-profile design, making it easy to fit into any space. Its UV-C light technology not only disinfects air but can also sanitize surfaces, bridging the gap between air purification and direct sanitation.

Finally, the Guardian Technologies 5308 caters to larger spaces, offering impressive air circulation and filtration capabilities. Equipped with a high-efficiency particulate air (HEPA) filter and a powerful fan, it effectively cleans larger areas while maintaining whisper-quiet operation.

In summary, Guardian Technologies’ products exemplify a commitment to improving air quality and promoting health through innovative technology. With features like HEPA filtration, UV-C sanitization, smart sensors, and sleek designs, consumers can choose from a range of models that best fit their needs, ensuring cleaner, safer indoor environments.
Top Page Image Contents