Robin RGV12000, RGV13000T Service Manual
Below you will find brief information for Generator RGV12000, Generator RGV13000T. This service manual provides detailed information on the construction, function, operation, safety precautions, and troubleshooting of the RGV12000 and RGV13000T generator models. It covers topics such as construction, voltage regulation mechanisms, AC output measurements, checking functional members like the stator and rotor assembly, disassembly, reassembly, and troubleshooting common issues like no AC output or voltage problems. It is essential to consult this manual for proper maintenance and repairs. It also advises to consult Robin EH63-65 OHV Engine Service Manual for engine related information.
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MANUAL
Models
RGVl2000 /13OOOT
GENERATORS
PUB-GS1328
Rev. Ol/OO
CONTENTS
Section Title Page
4.CONSTRUCTlONANDFUNCTlON l l l l l l l l l l l l l l l l l l
4-l CONSTRUCTlON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
J-2 FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4-3 DESCRIPTION andGENERATOROPERATlON l
7. MEASURING PROCEDURES l l l l l l l l l l l l l l l l l l l l
7-l MEASURING INSTRUMENTS l l l l l l l l l l l l l l
7-2 AC OUTPUT MEASURING . . . . . . . . . . . . . . . . . . . . . . . . . 24
7-3 DC OUTPUT MEASURING . . . . . . . . . . . . . . . . . . . . . . . . . 24
8. CHECKING FUNCTIONAL MEMBERS l l l l l l l l l l
8-l PlLOTlAMPandVOLTMETER l l l l l l l l l l l l l l
&2ACRECEpTACLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8-3 AC SWITCH (NO-FUSE BREAKER) l l l l l l l l l
8-4 STATOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
8-5 ROTOR ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8-6 BRUSH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8-7 A.V.R (AUTOMATIC VOLTAGE REGULATOR) l l l l l l
8-8 CURRENTTRANSFORMER (RGV13000T only) l l l l
8-9 ECU (ELECTRONIC CONTROL UNIT) . l l l l l l l l l l
8-10 IDLE CONTROL UNIT (RGV12000 only) . l l l l l l l l l
8-11 DIODE UNIT (RGV13000T only) l l l l l l l l l l
9. DISASSEMBLY and REASSEMBLY l l l l l l l l l l l l l l l l l
9-l PREPARATION and PRECAUTIONS l
32 g-2COMpONENTpARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
9-3 GENERATOR ASSEMBLING PROCEDURES l l l
10. TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . 40
103 AC VOLTAGE IS NOMINAL AT NO-LOAD, BUT LOAD CANNOT BE APPLIED l l
10-4 ENGINE DOSE NOT RUN . . . . . . . . . . . . . . . . . . . . . . . . . 41
11. WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . 42
NOTE
This Service Manual excludes information for engine.
As for the total servicing information as a generator set, please refer in conjunction with the
Robin EH63-65 OHV Engine Service Manual.
-02-
1. SPECIFICATIONS
Type
Model RGV12000
Brush, Self-exciting,
2-pole, Single phase
RGV13OOOT
Brush, Self-exciting,
2-pole, 3-phase
Rated frequency
8 Rated voltage
E
Q, Maximum output
2 .
Rated output
Power factor
Voltage regulator
Model
Type
Displacement
E z Maximum output
W
Fuel
I
‘Oil capacity
Starting system
Fuel tank capacity
Rated continuous 314 Rated operation per a tankful of fuel Rated
Noise level Rated (dB-7m)
12OV I 240V
12OOOVA
1 OOOOVA
60Hz
12OV I 208V
13OOOVA
1 OOOOVA
1.0
A.V.R type
0.8
C.T. type
EH65D EH63D
V-Twin cylinder, Air-cooled, 4-stroke, Overhead valve engine
653 cm3
22 HP/ 3600 rpm 18 HP/ 3600 rpm
Unleaded automobile gasoline
1.55 liters
Electric starter
43liters (21.5liters x 2)
Approx. 8.8 hours Approx. 9.5 hours
Approx. 8.0 hours
77.0 dB
Approx. 8.7 hours
77.0 dB
5 Large
& g Width
.- n High
820 mm
605 mm (752 mm *I)
Dry weight
760 mm (845 mm ‘I)
141 kg (149 kg ‘2) 143 kg (151 kg l *)
‘1: ( ) shows dimensions with castors.
‘2: ( ) shows dry weight with castors installed.
-l-
2. PERFORMANCE CURVES
l
RGV12000 / 60Hz (9.5 KW240V)
(Hz)
63
62
HZ
61
.I1
60
------------------------------------------
(VI
250
(125)
240
(120)
230
(115)
220
(110)
I/~~~~~~~~~
24OVl12OV
112
Load
. RGV13000T / 60Hz (12OW208V)
(Hz)
63
62
61
60
230 T
220 t
0
208V
-2- l/2
Load
4/4
Rated
,---
\
414
Rated
3. GENERAL DESCRIPTION OF GENERATOR
TANK CAP iLTANK
COOLING AIR
/ INLET PORT
K
/FUEL COCK
BATTERY
STOPPER
OIL FILLER CAP
SPARK PLUG CAP
CHbKE KNOB
(RGV13000T only)
CONNECTOR FOR
REMOTE CONTROL
(RGV12000 only)
END COVER
(RGV13000T only)
OIL GAUGE
OIL DkAlN PLUG ‘ELECTRIC STARTER
-3-
CONTROL PANEL
(RGVI 2000)
VOLT METER
OIL PURESSURE
WARNING LAMP
NO-FUSE BREAKER \ PILOT LAMP I HOUR METER
KEY SWITCH c AUTO IDEL
SWITCH
EARTH (GROUND)
TERMINAL
CONNECTOR
FOR REMOTE CONTROL
AC RECEPTACLE
(RGVI 3000T)
VOLT METER
OIL PURESSURE
WARNING LAMP
NO-FUSE BREAKER \ PILOT LAMP / HOUR METER
KEY SWITCH
:-.
I
EARTH (GROUND)
TERMINAL
AC RECEPTACLE
-4-
AC OUTPUT TERMINAL
SERIAL NUMBER
Serial number is stamped on the label stuck on the end cover.
NOTE : Always specify serial number when inquiring about the generator or ordering spare parts in order to get correct parts and accurate service.
(RGV13000T)
(RGV12000)
SERIAL NUMBER stamped label
SERIAL NUMBER stamped label
-5-
4. CONSTRUCTION AND FUNCTION
4-l CONSTRUCTION
BRUSH HOLDER
\
END COVER
(RGV13000T only)
STATOR BOLT \ REAR COVER
STATOR COMPLETE
I ROTOR COMPLETE
I
MOUNT RUBBER
‘y
/ I’
BALL BEARING I
SLIP RING
\
TROUGH BOLT
\
FRONT COVER
. .
4-2 FUNCTION
4-2-l STATOR
The stator consists of a laminated silicon steel sheet core, a main coil and a condenser coil which are wound in the core slots.
The condenser coil excites the rotor field coil which generates AC voltage in the main coil. -
-6-
4-2-2 ROTOR
The rotor consists of a laminated silicon steel sheet core and a field coil which is wound over the core.
DC current in the field coil magnetizes the steel sheet core.
Two permanent magnets are provided for the primary exciting action (RGV13OOOT).
Slip rings are provided on the rotor shaft to receive DC exciting current from AVR
(RGV12000) and diode unit (RGVl3000T).
A surge absorber is mounted inside of the insulator.
I
4-2-3 BRUSH I BRUSH HOLDER
An exciting current is supplied from the A.V.R to the rotor. The brushes are made of carbon and the brush-holder of plastic.
It is necessary to keep the contact pressure between the brushes and slip rings withing specific limits. Thus, care must be taken of brush length.
-7-
4-2-4 CURRENT TRANSFORMER
I DIODE UNIT (RGV13000T only)
The current transformer and diode unit will perform a role to step up the voltage lowered by the load and stabilize the output voltage.
CURRENT TRANSFORMER
4-2-5 A.V.R
(AUTOMATIC VOLTAGE REGULATOR)
(RGV12000 only)
The automatic voltage regulator employs an electronic circuit to automatically regulate voltage.
4-2-6 ECU (ELECTRONIC CONTROL UNIT)
ECU controls the start/stop of an engine enabling the fuel cut while stop.
It also automatically stops the engine if an abnormal oil pressure occurs.
DIODE UNIT
-8-
Function
Warning lamp
Description of Operation
When the lubrication oil pressure drops below the safety limit (Oil pres- sure becomes less than 1 kg/cm2), the warning lamp turns on and off, and the engine stops automatically. The warning lamp turns off after 3 minutes.
When the the engine started and reaches 1,050 rpm, the electric starter is automatically stopped.
Electric starter control
When the engine operating, the electric starter can not start.
When the key switch or the remote control switch is turned to ‘START”, the fuel cut-off valve of the carburetor opens. When the key switch or the remote control switch is turned to “STOP”, the fuel cut-off valve closes.
If the electric starter is locked by any reason, the electric starter is shut off automatically after 3 seconds.
Fail-safe function
Self checking function for warning lamp bulb
When the engine dose not start (engine speed dose not reach 1,050 rpm), the electric starter is stopped after 21 seconds.
When the remote controller is connected, the electric starter dose not run when the switch of remote controller is turned “OFF” even if the key switch on the generator is turned to “START”.
When the key switch or remote control switch is turned to ‘START”, the warning lamp lights up for a moment to indicate that the bulb for the warn- ing lamp is normal.
4-2-7 IDLE CONTROL UNIT
(RGV12000 only)
The idle control unit has a function to check that the generator has a load or not, then decrease the engine rotation at no load or increase it to the rated rotation.
The idle control unit releases throttle valve when the applied load current exceeds
0.04A.
NOTE :
It is normal that the engine speed goes up for a moment when you turn the key switch to
“STOP” while the Auto Idle Switch is in “ON” position.
-9-
IDLE CONTROL UNIT
4-2-8 OIL PRESSURE SWITCH
The oil pressure switch sends a signal to ECU to stop the engine when the engine oil pressure drops to 1 .O kg/cm2
.r?
4-2-9 RELIEF VALVE
The relief valve begins to open when the engine’s oil pressure increases above 3.0 kg/cm2
OIL FILTER
I
OIL PRESSljRE SWITCH
CAMSHAFT
OIL PUMP FILTER
4-2-10 AC SWITCH (NO-FUSE BREAKER)
The AC switch (no-fuse breaker) protects the generator from getting damage by overloading or short circuit in the appliance. The capacity of AC switch (no-fuse breaker) is as follows ;
Model
RGV12000
RGVl3000T
Specification
60Hz-12OV/24OV
60Hz-12OV/208V
No-fuse Breaker
39A
24A
Object of Protection
Total output amperage
Total output amperage n
. .
- lo-
4-2-l 1 AC Receptacle and Terminals
AC receptacle and terminals are used for taking AC output power from the generator.
A total of 4 kinds of receptacle and terminals, each varying in rated voltage and current from. another, are used. As many AC terminals as the receptacles, each matching the corresponding receptacle, are provided.
The rated current for each receptacle and terminal is shown as follows;
CAUTION
Be careful not to use the receptacles and terminal beyond the specified amperage limits to prevent burning.
Total 5Oh or less
(RGV12000)
CAUTION
To connect the appliance to the locking type receptacle, insert the plug in to the receptacle and then turn it clockwise to lock.
20A or less i +.
I
Rated curient or less
(RGV13000T)
(RGV12000)
-ll-
n
Check the amperage of the receptacles used referring to TABLE 1, and be sure not to take a current exceeding the specified amperage. n
Be sure that the total wattage of all appliances dose not exceed the rated output of the gen- erator.
Style Ampere up to20A up to 30A
Receptacle
NEMA
5-20R
NEMA
L!5-30R
AC plug
NEMA
5-2OP
Description
GFCI (Ground Fault Circuit interrupter) Receptacle, duplex
(RECl)
NEMA Locking Receptacle
L5-30 P (REC2) up to 30A
NEMA
L14-30R
NEMA
L143OP
Locking Receptacle
(REC3) up to 50A Locking Receptacle (REC4)
TABLE 1
NOTE :
When the no-fuse breaker turns off during operation, the generator is over loaded or the appli- ance is defective. Stop the generator immediately, check the appliance and / or generator for overloading or detect and have repaired as necessary by Robin dealer or service shop.
-[CAUTION]
The duplex 120V receptacle is protected by a GFCI (Ground Fault Circuit Interrupter).
GFCI shuts off the output current from the duplex 120V receptacle when a ground fault occurs in the generator or the appliance.
Please note that other receptacles are not protected by GFCI.
GFCI RECEPTACLE
After starting the engine, check the GFCI for proper functioning by the following test procedure. n
Push yellow TEST button, The red RESET button will pop out exposing the word TRIP.
Power is now off at the outlets protected by the GFCI, indicating that the device is functioning properly. m If TRIP dose not appear when testing, do not use the generator. Call a qualified electrician. n
To restore power, push RESET button.
- 12-
If the RESET button pops out during operation, stop the generator immediately and call a qualified electrician for checking generator and the appliances.
(2) CONNECTING TO DOMESTIC CIRCUIT (HOUSE WIRING)
All Robin generators are a neutral ungrounded type.
If a generator is to be connected to residential or commercial power lines, such as a stand-by power source during power outage, all connections must be made by a licensed electrician.
Failure in connection may result in death, personal injury, damage to generator, dam- age to appliances, damage to the building’s wiring or fire.
(a) When connecting a Robin generator to a house wiring, generator output power must be taken from the 24OV-4P receptacle.
(b) Install a transfer switch.
A transfer switch must be installed to transfer the load from the commercial power source to the generator. This switch is necessary to prevent accidents caused by the recovery from power outage. Use a transfer switch of the correct capacity.
Install transfer switch between the meter and the fuse or AC breaker box.
[CAUTION]
If the neutral wire of house wiring is grounded, be sure to ground the ground terminal of the generator, Otherwise an electric shock may occur to the operator.
- 13-
CONNECTING B
RECEPTACLE c
SWITCH m Ii
.n
42-l 2 3-PHASE APPLICATION (RGV13OOOT only)
Connection of Power Cables n
Do not touch output terminals while the generator is running or the operator may suf- fer severe electric shock resulting in death. w Be sure to shut down the generator before connecting or changing connection of power cables to the generator.
I
This generator has four output terminals of three phase, four wire system.
Connect power cables to the generator output terminals according to the type of application. n.
- 14-
.n
(1) 3-Phase application (208V)
Connecting the power cable&o terminals
U, V and W.
3-PHASE OUTPUT
(2) Single phase higher voltage application
(208V)
Connect the power cables to-terminals U and V, V and W, and U and W.
Maximum one-second (l/2) of generator output can be utilized from each phase.
Generator rated output :
5760VA (208V x 27.7A)
(3) Single phase lower application (120V)
Connect the power cables to terminals 0 and U, 0 and V, and 0 and W.
Maximum one-third (l/3) of generator out- put can be utilized from each phase.
Generator rated output :
3324VA (12OV x 27.7A)
/
0
L
0 u c v
-\ w
3
4
/
SINGLE-PHASE OUTPUT
SINGLE-PHASE OUTPUT
- 15-
4-3 DESCRIPTION of GENERATOR OPERATION
4-3-l PRIMARY EXCITING ACTION
(RGV12000)
When the generator is started, the perma- nent magnet on the engine rotates to genera- tor a voltage in the exciting coil.
This voltage is regulated by a diode in the
AVR to feed a current to the generator field coil. (FC). (See Fig. 4-1)
The rotor is turned an electromagnet by that current and rotates so that voltage are gener- ated in the stator coils (main coil and sub coil). The voltage generated in the sub coils is operated by the AVR to feed a current to increase the field coil current. (See Fig. 4-2)
As a result, the rotor magnetism increases.
This operation is repeated to generate the rated voltage at 50 Hz or 60 Hz in the main coil and DC coil.
FC
4-3-2 VOLTAGE REGULATING MECHANISM
(RGV12000)
Connect a load to the AC output terminal and increase current. Output voltage varies as shown in Fig. 4-3 depending on whether an automatic voltage regulator is used or not.
The operation of the AVR is explained below.
When an AC output is taken, the engine is loaded and its rpm falls, Also the AC voltage fails due to the voltage drop caused by the internal resistance of the coils. The AVR detects this voltage drop and its built-in SCR automatically increase the current flows to the field coil. As a result, the rotor magnetism increase, the voltage fallen by the load cur- rent is raised, and the output voltage is kept constant. If the AC output is reduced, the
SCR operates in the opposite way to similarly keep the output voltage constant.
Fig. 4-2
AVR
WITHOUT AVR
RATED VOLTAGE
WITH AVR
EC ;
Fig. 4-1
ENGINE MAGNETO
Fig. 4-3
-16-
4-3-3 CURRENT TRANSFORMER CONTROL (RGV13000T)
When the engine starts, a permanent magnet implanted in the rotor rotates, creating voltage in the main coil (MC). When a load makes contact with the coil, the load current passing through the primary coil of current transformer causes a magnetizing current to flow in ratio to the load current flowing through the current transformer primary coil. This magnetizing current passing through a diode to field coil creates a strong magnetic field in the rotor which falls with the amount of the load, increasing the voltage.
G r
------
CONTROL BOX
ir
-__-__-__-__-__---------
AC output 1 terminal !
0’ ll:
4-3-4 THE ADVANTAGES OF CURRENT TRANSFORMER CONTROL (RGV13000T)
With AVR control, control is effected according to variations in output voltage.
When an inductive load is applied, a large starting current is required (current variations are greater than voltage variation), precise control becomes difficult.
Current transformer control, on the other hand, controls the output voltage according to the load current, which is better for using inductive load.
- 17-
5. SAFETY PRECAUTIONS
r-
1. Use extreme caution near fuel. A constant danger of explosion or fire exists.
Do not fill the fuel tank while the engine is running. Do not smoke or use open flame near the .- fuel tank. Be careful not to spill fuel when refueling. If spilt, wipe it and let dry before starting the engine.
2. Do not place inflammable materials near the generator.
Be careful not to put fuel, matches, gunpowder, oily cloth, straw, and any other inflammables near the generator.
3. Do not operate the generator in a room, cave or tunnel. Always operate in a well-venti- lated area.
Otherwise the engine may overheat and also, the poisonous carbon monoxide contained in the exhaust gases will endanger human lives. Keep the generator at least 1 m (4 feet) away from structures or facilities during use.
4. Operate the generator on a level surface.
If the generator is tilted or moved during use, there is a danger of fuel spillage and a chance that the generator may tip over.
5. Do not operate with wet hands or in the rain.
Severe electric shock may occur. If the generator is wet by rain or snow, wipe it and thor- oughly dry it before starting.
Don’t pour water over the generator directly nor wash it with water.
If the generator is wet with water, the insulation’s will be adversely affected and may cause current leakage and electric shock.
6. Do not connect the generator to the commercial power lines.
This may cause a short-circuit or damage to the generator.
7. Be sure to check and remedy the cause of circuit breaker tripping before re-setting it on.
CAUTION : If the circuit breaker tripped off as a result of using an electrical appliance, the cause can be an overload or a short-circuit. In such a case, stop opera- tion immediately and carefully check the electrical appliance and AC plugs for faulty wiring.
.-
- 18-
6. RANGE OF APPLICATIONS
Generally, the power rating of an electrical appliance indicates the amount of work that can be done by it. The electric power required for operating an electrical appliance is not always equal to the output wattage of the appliance. The electrical appliances generally have a label show- ing their rated voltage, frequency, and power consumption(input wattage). The power con- sumption of an electrical appliance is the power necessary for using it. When using a generator for operating an electrical appliance, the power factor and starting wattage must be taken into consideration.
In order to determine the right size generator, it is necessary to add the total wattage of all appliances to be connected to the unit.
Refer to the followings to calculate the power consumption of each appliance or equipment by its type.
(1) Incandescent lamp, heater, etc. with a power factor of 1.0
Total power consumption must be equal to or less than the rated output of generator.
Example : A rated 3000 W generator can turn thirty 1 OOW incandescent lamps on.
(2) Fluorescent lamps, mercury lamps, etc. with a smaller power factor
Select a generator with a rated output equivalent to 1.2 to 2.times of the power consump- tion of the load.
Example : A 400W mercury lamp requires 600 W to 700 W power source to be turned on.
A rated 3060 W generator can power four or five 400 W mercury lamps.
NOTE 1 : If a power factor correction capacitor is not applied to the mercury lamp or fluorescent lamp, the more power shall be required to drive those lamps.
A rated 3000W generator can drive one or two 400W mercury lamps without power fac- tor correction capacitors.
NOTE 2 : Nominal wattage of the fluorescent lamp generally indicates the output wattage of the lamp.
Therefore, if the fluorescent lamp has no special indication as to the power consumption, efficiency should be taken into account as explained in item (5) on the following page.
(3) Motor driven tools and light electrical appliances
Generally the starting wattage of motor driven tools and light electrical appliances are 1.2 to 3 times lager than their running wattage.
Example : A rated 250 W electric drill requires a 400 W generator to start it.
(4) Initially loaded motor driven appliances such as water pumps, compressors, etc.
These appliances require large starting wattage which is 3 to 5 times of running wattage.
Example : A rated 900 W compressor requires a 4500 W generator to drive it.
NOTE 1 : Motor-driven appliances require the aforementioned generator output only at the starting.
Once their motors are started, the appliances consume about 1.2 to 2 times their rated power consumption so that the excess power generated by the generator can be used for other electrical appliances.
- 19-
NOTE 2 : Motor-driven appliances mentioned in lets (3) and (4) vary in their required motor starting power depending on the kind of motor and start-up load. If it is difficult to determine the optimum generator capaciv, select a generator with a larger capacity.
(5) Appliances without any indication as to power consumption
Some appliances have no indication as to power consumption; but instead the work load
(output) is indicated. In such a case, power consumption is to be worked out according to the numerical formula mentioned below.
(Output of electrical appliance) = (Power consumption~
(Efficiency)
.-.
Efficiencies of some electrical appliances are as follows:
Single-phase motor l l l l l l
- l l
0.6 to 0.75
Three-phase motor l l l l
* l l l l l
0.65 to 0.9
II-
Fluorescent lamp l l l l
9 l l
- l l l
0.7 to 0.8
The smaller the motor, the lower the efficiency.
Example 1 : A 40 W fluorescent lamp means that its luminous output is 40W. Its efficiency is
0.7 and accordingly, power consumption will be 40+0.7=57W. As explained in item(2), multiply this power consumption value of 57 W by 1.2 to 2 and you will
Example get the figure of the necessary capacity of a generator. In other words, a genera- tor with a rated output of 1000 W capacity can light nine to fourteen 40W fluores- cent lamps.
2 : Generally speaking, a 400 W motor means that its work load is 400 W.
Efficiency of this motor is 0.7 and power consumption will be 400+0.7=570 W.
When this motor is used for a motor-driven tool, the capacity of the generator should be multiple of 570W by 1.2 to 3 as explained in the Item (3).
570 (W) x I .2 to 3=684 (W) to1 710 (W)
,-
-.
Applications
I
Incandescent Lamp, Heater
I
I
Fluorescent Lamp, Electric Tool
I
1 Pump, Compressor I
Applicable Wattage on/)
RGV12000 (60 Hz)
10000
4950
2500
I
I
I
-2o-
NOTES : Wiring between generator and electrical appliances
1. Allowable current of cable Use a cable with an allowable current that is higher than the rated input current of the load (electrical appliance). if the input current is higher than the allowable current of the cable used, the cable will become excessively heated and deteriorate the insuia- tion, possibly burning it out.
Table 7-2 shows cables and their allowable currents for your reference.
2. Cable length if a long cable is used, a voltage drop occurs due to the increased resistance in the conduc- tors decreasing the input voltage to the load (electrical product) As a result, the load can be damaged.
Table 7-2 shows voltage drops per 100 meters of cable.
Voltage drop indicates as V= &- X R XIX Q
R means resistance (Q / 100 m) on the above table.
I means electric current through the wire (A).
Q means the length of the wire (m).
The length of wire indicates round length, it means twice the length from generator to electrical tools.
-2l-
7. MEASURING PROCEDURES
7-l MEASURING INSTRUMENTS
(1) VOLTMETER
AC voltmeter is necessary.
The approximate AC voltage ranges of the voltmeters to be used for various types of generators are as follows :
0 to 150 V : Type with an output voltage ofllOor120V
0 to 300 V : Type with an output voltage of 220,230 or 240 V
0 to 150 V, 0 to 330 V : Dual voltage type
(2) AMMETER
AC ammeter is necessary.
An AC ammeter with a range that can be changed according to the current rating of a given generator is most desirable.
(About 10 A, 20 A, 100 A)
FOR AC
(3) FREQUENCY METER
Frequency range : About 45 to 65Hz
NOTE : Be careful of the frequency meter’s input voltage range.
-22-
(4) CIRCUIT TESTER
Used for measuring resistance, etc.
(5) MEAGER TESTER
Used for measuring generator insulation resistance.
Select one with testing voltage range of
5oov.
7-2 AC OUTPUT MEASURING
TO AC
Use a circuit above for measuring AC output. A hot plate or lamp with a power factor of 1 .O may be used as a load. Adjust-the load and rpm. and check that the voltage range is as speci- fied in the following table at the rated amperage and rated rpm.
-23-
. ROTOR a Measure the resistance between the slip ring and the core.
L_
. CONTROL PANEL
Measure the insulation resistance between the live parts and the grounded parts.
. CURRENT TRANSFORMER (RGV13000T)
Measure the insulation resistance between each terminal and the core.
If it is less than 1 M Q, replace the current transformer.
Any part where the insulation resistance is less than 1 M Q has faulty insulation, and may cause electric leakage and electric shock.
Replace the faulty part.
-225-
8. CHECKING FUNCTIONAL MEMBERS
6-l PILOT LAMP and VOLTMETER
Check the pilot lamp and the voltmeter if it is turned on by applying specific voltage.
Pilot lamp and voltmeter cannot be checked with circuit tester because its resistance is too large.
PILOT LAMP
8-2 AC RECEPTACLES
Using a circuit tester, check continuity between the two terminals at the rear of the
AC receptacles while the receptacle is mounted on the control panel. When continu- ity is found between the output terminals of the receptacle with a wire connected across these terminals, the AC receptacle is normal.
When the wire is removed and no continuity is found between these terminals, the recep- tacles are also normal.
-26-
8-3 AC SWITCH (NO-FUSE BREAKER)
Check continuity between each of 2 terminals at the back side of AC switch (no-fuse breaker) while it is mounted on the control panel.
Normally, there is continuity between each of the 2 terminals when the breaker is ON, while no continuity when the breaker is OFF.
WY
RGV12000 RGV13000T
8-4 STATOR
Disengage connectors on the wires from stator and check the resistance between wires with a circuit tester, referring to the following specification table.
NOTE : If the circuit tester is not sufficiently accu- rate, it may not show the values given and may give erroneous readings.
Erroneous readings will also occur when there is a wide variation of resistance among coil windings or when measure- ment is performed at ambient tempera- tures different from 20 “c
(68 “F).
Model Hz/Voltage
RGV12000 60/i 20/240
RGV13000T 60/l 20/208
Stator coil
Red-White Black-Blue Black-Red
0.11 Q
0.23Q -
0.11 Q -
0.23R
White-
Light green
0.37s2
-
Black-White
-
0.23 Q
-27-
8-5 ROTOR ASSEMBLY
1) Field coil
Remove the brush holder and measure resistance between the slip rings.
Rotor (Slip ring)
RGV12000
RGV1300dT
Resistance
4.11Q
69.6 Q
NOTE : If the circuit tester is not sufficiently accu- rate, it may not show the values given and may give erroneous readings.
Erroneous reading will also occur when there is a wide variation of resistance among coil windings or when measure- ment is performed at ambient tempera- tures different from from 2O”c(68 “F).
SilP RING
2) Cleaning Slip rings
The slip ring surfaces must be uniformly bright. Slip rings showing black spots, excessive wear, or uneven wear must be repaired. A stained slip ring lowers gener- ator efficiency and output voltage. Polish the slip rings with fine sandpaper while turning the rotor until rough spots disap- pear. Care should be taken not to touch the rotor coils with the sandpaper.
-28-
8-6 BRUSH
The brushes must be smooth where they contact the slip rings. If not, polish smooth the brushes with sandpaper. A brush that is not smooth produces arcs between the brush and slip ring leading to possible damage.
Usable brush lengths are from 5 mm to 15 mm (0.2 ” to 0.6”).
A brush shorter than 5 mm must be replaced because decreased contact pressure between the brush and slip ring lowers gen- erator efficiency and output voltage.
(O&Y0 0.2") t
\
- BRUSH
8-7 A.V.R
(AUTOMATIC VOLTAGE REGULATOR)
1) Features
This AVR operates to control the field current in order to maintain the ouput voltage for the
AC current, which generated by the magnetic flux by the field coil.
0
2) Distinguish the Good and Bad Parts
For making a simple Good (G) / No-Good
(NG) judgement, refer to the following table showing continuity test criteria when mea- sured between lead wires using a circuit tester.
Circuit tester (with measuring range of more than 1 M Q When measuring continuity, set the cir- cuit tester to the range reading a high resistance (1 M Q).
* Checking table for analogue circuit tester.
Analogue circuit tester
Yellow
Apply red @ needle of the circuit tester
Red
White
-Light green
BrownlYellow
Yellow co
33
16 kB xl
Apply black 0 needle of the circuit tester
Red
03
White
03
Light green co
Brown/Yellow
03
50kR
220kQ
185kQ
100kQ
125 kQ
100 k!2 co
03 co
200kQ
100kQ
14kQ
-29-
8-8 CURRENT TRANSFORMER
(RGV13000T only)
Disconnect the connectors and coupiers of current transformer.
Check the inter-terminal resistance of current transformer with a circuit tester.
If current transformer is found to be faulty, replace with new one.
8-9 ECU (ELECTRONIC CONTROL UNIT)
Check the resistance between 13 terminals of ECU with circuit tester.
Terminal number of the ELECTRONIC CON-
TROL UNIT
I Tester (4
@-cxlcowwwwwwwwww
0 co - co ccl co a3 co co co co co co co
@ 03 18.4MR - 1OMR 10.2MQ 03 10.4MR 1lMR 14.4MR 5.3MC.I 03 03 co rester
(+I
@
@
1 @--I
Co co
CO
CO
CO
Co
CQ
00
Co
CO
-
Co
CO
-
CO 1 CO 1 00 1 Co 1 CO 1 CO 1 03 1 -
Co 03 03
03 2675kQ Co
(2590kRj
03
Co
CO 1 03
03
00
1 CO
Co
CO
1 Co
8-10 IDLE CONTROL UNIT
(RGV12000 only)
Check the resistance between five terminals of IDLE CONTROL UNIT with circuit tester.
Terminal number of the IDLE CONTROL
UNIT
Apply black 0 needle of the circuit breaker
Circuit tester (with battery power source 1.5 V) needle of the cir-
*Tester measuring range : 1000 k Q
NOTE : The resistance readings vary depending on the types of circuit testers.
The above table shows an example of the resistance readings measured by an ordi- nary analogue circuit tester with 1.5 volt battery power source. it is advisable for you to check the resistance readings using your standard circuit tester and revise the checking table.
- 31-
8-11 DIODE UNIT (RGV13000T only)
Check the resistance between five wires of
DIODE UNIT with circuit tester.
Diode unit needle of the cir- cuit breaker
9. DISASSEMBLY AND ASSEMBLY
9-1 PREPARATION and PRECAUTIONS
1) Be sure to memorize the location of individual parts when disassembling the generator so that the generator can be reassembled correctly. Tag the disassembled part with the neces- sary information to facilitate easier and smoother reassemble.
2) For more convenience, divide the parts into several groups and store them in boxes.
3) To prevent bolts and nuts from being misplaced or installed incorrectly, replace them tem- porarily to their original position.
4) Handle disassembled parts with care; clean them before reassemble using a neutral clean- ing fluid.
5) Use all disassembly / assembly tools properly, and use the proper tool for each specific job.
9-2 COMPONENT PARTS
For disassembling and assembling, the following illustrations show the major component parts and their configuration for (1) Generator assembly, (2) Control Box and (3) Fuel Tank and sys- tem.
The specified tightening torque is indicated in the illustration.
-32-
(1) Generator assembly
MOUNT RUBBER
‘.I-\
Wk.
=&‘\! I
-33-
Jw?i?M
BUSHING
1 cFLANGE
‘\.j
NUT
I
11.&13.7Nm
120-140Kg-cm
1
1
END COVER
STATOR COVER
RGV13000T onlv I
(2-l) Control Box (RGV12000)
PLAT\E
I
\I
I‘\
’
CONNECTOR
EARTH /
CONTROL
AC RECEPTACLE
IDEL CONTROL
SWITCH
L
NO-FUSE
BREAKER
AC RECEPTACLE
\
-1 e-
CiAMP
/-
/’
/
I
STARTER SWITCH
I7
VOLi METER
PRESSURE
FINING LAMP
- 34-
(2-2) Control Box (RGVI 3000T)
PLATF
CURRENT.TRANSFORMER
EARTH (GROUND) I r
ND-FUSE BREAKER
-35-
VOLT METER
AC dUTPUT
TERMINAL
(3) Fuel Tank
FILTER
PACKING
CUP
FUELTANK\\w
BRACKET
\ $j+
STRAINER
PURSE LOCK
-36-
a
1. FRONT COVER
Attach the front cover to the engine main bearing cover. Match the faucet joint and tighten the bolts.
I
Tightening torque
I
120-14Okg -cm
11.8-13.7 N .rn
(8.7-10-l ft -Ibs)
FRONT COVER
I B6LT
2. ROTOR
(1) Wipe off oil, grease and dust from the tapered portion of engine shaft and matching tapered hole of rotor shaft.
(2) Mount the rotor to the engine shaft.
Tighten the through bolt.
Apply a wrench on the through bolt and hit wrench handle clockwise with a ham- mer to tighten.
If an impact wrench is available, use it.
I Tightening torque
I
230-250kg-cm
22.5-24.5 N -m
(16.6-19.5 ft-lbs)
3 STATOR
(1) Put the stator in the rear cover setting the four grooves on the side of stator with thread holes of the rear cover.
Tighten the four bolts tentatively to check if the grooves and thread holes are aligned correctly.
NOTE : Be careful not to give cuts to wires when pulling them out from the rear cover.
(2) Remove the four bolts.
- 37-
STATOR COVER
4. REAR COVER
(I) Attach the bushing over the lead wire drawn out from the rear cover.
Press the smaller end of the bushing into the window of the rear cover.
(2) Put the rear cover with stator and start cover over the rotor.
Tap on the rear cover evenly with a plastic hammer to press the rotor bearing into the rear cover.
(3) Fix the rear cover with four bolts, spring washers, and washers.
I
Tightening torque
I
120-140kg -cm
11.8-13.7 N -m
(8.7-10.1 ft sibs)
(4) Install the brush holders in the rear cover.
Pass the mounting screws through the brush holders, push the brush holders so that the brushes will be perpendicular to the slip rings, and tighten the screws.
NOTE : There are two kinds of brush holders.
If a brush is installed oblique to the slip ring, the brush holder can break when the screw is tightened; or the brush may break when the generator of started.After installing the brush holders, measure the resistances across the brushes and terminals with a tester if they are from 5 ohrms to 7.5 ohrmslf so, the brush holders are correctly mounted.
-38-
FLANGE rdd
BRUSH
HOLDER
FLANGE
BOLT
BRUSH
COVER
I
END COVER
Attach the connetors to the brush holders.
Connector the green wire to the stator end a and the brown wire to the bearing end.
Install the brush cover.
(5) (RGV13000T only)
Attach the end cover to the rear cover.
(6) Tighten the nuts over the mount rubber bolts to fix.
I
Tightening torque
I
1
120-140kg
11.8-13.7 N .rn
-cm
(8.7-10.1 ft-lbs)
NOTE : When tightening the nuts, slightly lift the alternator assembly so that the weight is not applied to the mount rubbers.
(7) Fasten the earth cable to the unpainted bolt hole on the frame.
- 39-
IO. TROUBLESHOOTING
1 O-1 No AC output l
Checking the exciting coil for resistance. (RGV12000) (Refer to 8-3.)
If insulation is NG, replace exciting coil with new one.
* Checking the brush and slip ring of rotor for resistance.
If insulation is NG, replace brush and slip ring with new one.
(Refer to 8-3.)
* Check stator for winding resistance between terminals. (Refer to 9-4.)
If stator is faulty, replace with new one.
* Checking stator for insulation resistance.
If insulation is NG, replace stator with new one.
(Refer to 8-3.)
* Checking the A.V.R . (RGV12000)
If insulation is NG, replace A.V.R with new one. ’
(Refer to 9-7.)
* Checking-the diode unit and C.T . (RGV13000T)
If insulation is NG, replace diode unit and C.T with new one.
10-2 AC Voltage is too high or too low
* Check engine speed.
Nominal engine speed at no load ; 3,100 to 3,150 rpm l l
If engine speed is too high or too low, adjust to the rated rpm.
Check stator for winding resistance and insulation. (Refer to 9-4 and 8-3.)
Check rotor for resistance and insulation. (Refer to 9-5 and 8-3.)
* Checking the idle control unit. (RGV12000) (Refer to 9-l 0.)
If insulation is NG, replace idle control unit with new one.
IO-3 AC voltage is nominal at no-load, but load cannot be applied.
* Check engine speed.
If engine speed is low, adjust to the rated rpm.
* Check total wattage of appliances connected to generator.
If the generator is overloaded, reduce the load to the rated output of generator. l
Check appliance for trouble.
If the appliance is faulty, replace it.
* Check if engine is overheated.
If generator cooling air inlet and/or outlet is clogged with dirt, grass, chaff or other debris, remove it.
* Check insulation of generator. (Refer to 8-3.)
-4o-
10-4 Engine dose not run.
Symptom Possible causes Remedy
1) The key switch (or remote switch) is turned to “START’ Wait for more than 2 seconds and then turn the within 2 seconds the engine has key switch to “START” position. been stopped.
1. Electric starter dose not operate
2) The remote controller is con- netted.
Both the key switch of the generator and the switch of remote controller must be turns into
“ON” position.
3) The above possible causes 1) and 2) dose not apply.
The ECU is defective.
Replace with new one.
1) No fuel in the tanks or the fuel cocks are closed.
Supply fuel or open the fuel cocks.
2. Warning lamp turns on and off when engine is stopped
2) Oil level is low or oil is contami- nated.
Add or change engine oil.
3. Engine is auto- matically stopped but the warning lamp dose not light up
1) The bulb of warning lamp failed. Replace the bulb with a new one.
- 41-
11. WIRING DIAGRAM
(RGV12000) mm)-;- JI I
II f-5
GENERATOR CONTROL BOX
(Remote control)
AC output receptacle(l20V)
AC output receptxle(l~~Z40V)
AC output receptacle(l20/24OV)
1 1 1
III
1 4Gm
Y i---.-
: :
7;
Exciting coil
(Engine)
---__-_--------------
Wiring color cord
Btk : Biick
BrmVi : BrawvWhite
BMW : Bteck,Whnte Gm : Green
Blr:
LBlu
Bm
: Blue
: Liptblue
: Brown
GnW
Org
Gry
: GreenWhite
: Orange
: Gray
R
W
: Red
: White
Y
Pik
: Yellow
: Pink
Gmh’ : GreemWeilow
BWR : BlecWRed
FtiW : R&White
LGm : Light green
-42-
a
(RGVI 3000T)
I
C
-LGm
1
BOX
$
---------- r-w---p-w1 wi
@
Iv- m&ssur
-7
I
I
L to earth terminal
-------------------
Key switch
---- ----------- --
AC output terminal
0
-1
Earth(Ground) terminal
-43-
Robin America, Inc. e-mail: [email protected] l wwwrobinamerica.com
0 Copyright 2000 Robin America, inc.
PRINTED IN THE USA
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Key features
- Brush, Self-exciting
- 2-pole, Single & 3-phase
- 60Hz Frequency
- Voltage Regulator
- AC output
- Electric starter
- Oil pressure warning
