Subaru Robin Power Products R600 User Manual

Model

.

CONTENTS

Section

SPECIFICATIONS ..........................................

1.

PERFORMANCE CURVES

2.

2-1 AC Output ..........................................

2-2 DC Output ..........................................

FEATURES ..............................................

3.

SERIAL and SPECIFICATION NUMBER LOCATION

4.

SAFETY PRECAUTIONS

5.

5-1 Fire Prevention .......................................

5-2 Precautions for Exhaust Gases.
5-3 Other Precautions

COMPONENT IDENTIFICATION

6.

FUNCTION OF EACH COMPONENT

7.

7-1
7-2

Generator ...........................................

Engine .............................................

Title

....................................

.....................................

.............................

......................................

...............................

............................

................

Page

1

2

2

3

5

6

7

7
7
7

8

11

11
12

DESCRIPTION OF MAIN COMPONENTS

8.

8-1

8-2

OPERATIONAL LIMITS OF THE GENERATOR.

9.

9-1

9-2
9-3
9-4

MEASURING PROCEDURES

10.

Electronic lgnition System
Generator Operation

AC Output ..........................................

DC Output ..........................................

Simultaneous Use the AC/DC Output

Wire Length. .........................................

10-1 Meters .............................................

10-2 Measuring AC Output
10-3 Measuring DC Output

10-4 Measuring Insulation Resistance . . . . . . . . . . . . . . . . . . . . .

................................

....................................

..................................

...................................

...................................

.........................

...................

......................... 20

14

14
15

17

17
19

20

21

21
23
23
23

Section

Title

Page

11.

FUNCTIONAL CHECK OF EACH COMPONENT.. . . . . . . . . . . . . . . . . .

25

11-1 Control Panel

11-2 Stator.....

11-3 Rotor . . . . .

11-4

lgnition Coil
11-5 Condenser
11-6

Rectifier . .

. .

. . .

. . .

.
. .

. . .

.

. .

.

. .

.

.

. .

. . . .

. . .

. . . .

. . .
. . .

. . . .

. . . . .

. . . . . .

. . . .

. . .

......

......

......

......

. . . . .

. . .

25

. .

27

. . . 29

. .

29
. . 30
. . .

30

12.

DISASSEMBLY AND ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

31

12-1

Preparation and Precautrons

...............................

31

12-2 Special Tools for Disassembly and Assembly ....................

31

12-3 Disassembly Sequence ...................................

32

12-4 Assembly Procedure ....................................

38

12-5 Carburetor ..........................................

48

13.

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

51

14.

CRITERIA TABLE FOR ADJUSTMENT . . . . . . . . . . . . . . . 68

15.

WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

71

16.

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

72

16-1 Daily Checks and Maintenance (every 8 hours)

................... 72

16-2 Checks and Maintenance for Every 20 Hours

....................

72

16-3 Checks and Maintenance for Every 50 Hours (every 10 days) ......... 72

16-4 Checks and Maintenance for Every 200 Hours (monthly) ............

73

16-5 Checks and Maintenance for Every 500 Hours (semi-annually) ........ 73

16-6 Checks and Maintenance for Every 1000 Hours (annually) ........... 73

16-7 When the Generator is not used for Prolonged Periods: ............. 73

1. SPECIFICATIONS

Model

R600

Engine:

i Type

Forced air-cooled, 4-stroke, side valve,

gas01 ine engine

L--

Displacement

78 cc (4.76 cu.in.1

Fuel tank capacity

2 lit. (0.53 U.S. gal.)

Oil pan capacity

350 cc (0.75 U.S. pints)

Ignition system

Solid state ignition

~~

Starting system

Recoil starter

Rated continuous

Approx. 4 hours (50 Hz)

operating hours Approx. 3.5 hours (60 Hz)

Generator:

Type

2-pole, revolving field type

Exciting system

Self-exciting

Voltage regulating
system

Condenser type

Maximum output 500 w 600 W

Rated output 400 w 500w

AC Frequency

50 Hz 60 Hz

AC Voltage

110, 220,230,24OV

110, 120,220v

DC output 12V - 100 W (8.3 A)

AC receptacle

Standard: 2 ea.

(special: 1 ea.)

DC terminal Two

Over current
protection

Circuit breaker

Frequency meter

Standard equipment

Pilot light

Standard equipment

Dimensions (L x W x H):

370 x 265 x 345 mm
(14.6 x 10.4 x 13.6 in.)

Dry weight

18.5 kg (40.7 Ibs)

-1-

2. PERFORMANCE

2-1 AC OUTPUT

Power Factor . . .

CURVES

1

.o

3

-t

w
3

a

I I I I 1

! 1 I 1 1

I ’

I I

!

1 OUTPUT’

i ,

I

FRECiENC

i/: ‘1 I

1

Y I

i 300

t

240

/ I

/ I I $

CURRENT IA) -

1

I

, ,

I

1 I 1 1 i

, OUTPUT

1.1 j 500

: :

50

i I I

I II

-i----l

49-

/‘\I

// FREQUENCY

400

t
I

I

/

I 1 a
I , :

I

/ I I !

300

260

I

/ : I I

Output Max.

............... 500W

Rated

............... 400W

Frequency.

................

50 Hz

Voltage.

.................. 220V

Output Max.

............... 500W

Rated

............... 400W

Frequency.

................ 50 Hz

Voltage

................... 230V. 240V

vi : I 1

0 0.5 1 1.5 2 2.5 0

CURRENT

(Al -

-2-

w

U

LL

-1

1

w

>

U

a

3

1

Output Max.

Rated

Frequency

Voltage

...................

...............

...............

.................

500W

400W

50 Hz

11OV

1

N

I

-

62

tI

3

61

U

w

U

60

LL

59

-1

1

>

w

120

17

110

a

I-

J

100

0

>

0

N

I

-

62

3

61

E

U

60

U

59

240

>

230

(3

a

220

5

210

0

>

CURRENT

1 2

CURRENT

(A)

3

(A)

-

4

-

600

500

400

1

I

3

300

3

0

I-

200

2

100

6

0

600

500

400

300

200

100

1

-

3

-

I-

2

I-

3

0

5

Output Max.

Rated
Frequency
Voltage

Output Max.

Frequency
Voltage.

...................

Rated

.................

..................

...............

...............

.................

...............

600W
500W

60

1 1 OV

600W

............... 500W

60 HZ
220V

Hz

a

0.5

1

CURRENT

1.5

(A)

2

-

2.5

a

-4

-

52

51

50

49

0

1 2 3

CURRENT IA)

4 5

-

600

500

400 t

300 +

200 2

6

Output Max. ...............

...............

Rated

Frequency .................

Voltage.

3

3

E

..................

500W
400W
50 Hz

11OV

I I I I I

62
61
60
59

120
110
100

0

1 2 3

CURRENT IA)

4 5

-

FREQUENCY

r
I

1

400

300

200 ‘0

100

0

6

I

3

f
k

Output Max. ...............

...............

Rated

Frequency .................

Voltage.

Output Max.

..................

...............

Rated ...............

Frequency
Voltage

.................

...................

600W

500W

60 HZ

11OV

600W

500W
60 Hz
220V

0 0.5

1 1.5

CURRENT (A)

2 2.5

-

-4-

3. FEATURES

l

Robin Exhaust Fan Cooling System for low body temperatures, low noise. longer engine life and reliable performance.

l

Large 78cc

4Stroke

Engine provides enough power for constant 500W (at 60 Hz) rated output.

l

Simple One-Touch Engine Control Switch with the engine and fuel on/off levers and choke all integrated into one

switch.

l

Easy and Reliable Starting with pointless ignition. This generator is also a brush-less type generator for maintenance-free
operation.

l

Simple Design for a clean appearance and easy maintenance.

l

Compact and Lightweight with an easy one-hand carrying handle grip. This generator also offers a high power-to-weight
ratio and economical operation.

l

Circuit Breaker Protection for safe operation. Replacement of fuses is not necessary in case of an overload.

l

Unique Dual Output Design so that two separate A.C. and D.C. electrical appliances can be used at the same time.

-5-

4. SERIAL and SPECIFICATION NUMBER LOCATION

The serial number is stamped on the crankcase at the opposite side of the carburetor.

The specification and specification number are shown on the nameplate located on the rear cover.

Always specify these numbers when inquiring about the e

oenerator or ordering parts in order to get correct parts and accurate

service.

SPECIFICATION

SPECIFICATION NUMBER

SERIAL NUMBER

Fig. 4-7

-6-

” - . . . - . . - -

5. SAFETY- PRECAUTIONS
51

1)

2)

3)

4)

5)

6)

7)

8)

5-2

1)

3

5-3

1)

2)

3)

4)

FIRE PREVENTION

Keep the generator away from combustible materials during operation. Take special precautions with flammable sub­stances.
Do not run the generator in a incline position or while it is slanted at an angle. Avoid moving the generator while it
is in operation to prevent the generator from falling over or leaking fuel.
Do not place a carton or similar object over the generator while the generator is running. If covered, cooling will be
diminished and cause the generator to overheat.
Operate the generator at least lm away from a building or wall.
Be sure to stop the engine before filling fuel into the fuel tank.
If fuel is filled while the engine is running, fuel vapors may rise from the fuel tank resulting in a potential fire hazard.
Fuel used in engine operation is very volatile and highly flammable. Take special precautions not to spill fuel when
filling the fuel tank. If fuel is spilt, wipe it off thoroughly and let dry before starting the engine.
Do not overfill the fuel tank and always be sure to fill iuel only up to the level specified at the fuel supply- port.
Do not smoke or use open flame when filling the fuel tank.

PRECAUTIONS for EXHAUST GASES

Avoid operating the generator in poorly ventilated locations such as an office, warehouse. narrow tunnel. well, hold.
tank. etc..

If the generator is run continuously in such poorly ventilated areas. the operator may suffer carbon mono­xide poisoning.
Always operate the generator with the exhaust port directed toward the open air or where good ventilation is assured.

OTHER PRECAUTtONS

To prevent electric shock. do not touch the generator with wet hands.

For example, when the generator is used to

drive a submersible pump, be sure to connect the earth cord of the generator to the earth cable of the pump.
Do not splash water over the generator during operation.

And also avoid operating the generator in the rain. If the
generator gets wet. it may fail to start or short-circuit. and the operator may possibly receive a severe electric shock.
Do not connect the generator to existing power lines which have been originally installed as the power supply system
of a building. If connected. the generator will burn out.
Avoid running the generator with its cover removed.

-7-

6. COMPONENT IDENTIFICATION

h’UFFLE9
C 0 V E F1

AlFl CLEALER

FUEL T.ANY

Fig. 6- 7

Al=

CLEdYER CO\.‘ER

GEZERATOS

RECOIL STIRTE?

Fig. 6-3

\*’ ” z

FLER C :O\.‘ER

/

Ffg. 6-4

-9-

SPARK PLUG

Fig. 6-5

CAPBLRETOR

#El3 PIPE

AIR \;E’JTl

Fig. 6-6

-

10-

7. FUNCTION of EACH COMPONENT

7-1 GENERATOR

7-1-1 STATOR

The stator consists of a laminated silicon steel sheet core,

a main coil and condenser coil which are wound in the core
slots.
AC and DC output are taken out from the main coil. (DC
output is taken out from the part of main coil which is in
the middle of the main coil.)
The condenser coil excites the stator field coil which
generates AC output in the main coil.

7-1-2 CONDENSER

REAR HOUSING

RECTIFIER

Fig. 7- 7

The condenser is mounted on the rear housing and is connected to the condenser coil which is wound in the stator. The
condenser coil magnetizes the rotor which increases the density of magnetic flux.

7-1-3 RECTIFIER

The rectifier is also mounted on the rear housing and it converts AC current output from the main coil to DC current. The
DC output from the diode of this rectifier is connected to the DC terminal.

7-1-4 ROTOR

The rotor consists of a lamination silicon steel sheet core
and field coil which is wound over the core.
DC current m the field coil magnetizes the steel sheet core.
Two permanent magnets are provided at 90 degrees from

the poles for the primary exciting action.
A securely mounted fan is pressure-fitted on the end of the
rotor shaft to cool the individual coils. iron cores. rectifier.
and other integral parts.
Cooling air from the fan is drawn in from the ventilation

vents in the rear housing. and is discharged from the ex-

haust port in the front housing.

Fig. 7-2

7-l-5 CONTROL PANEL

The panel on the front of the housing has a receptacle with

a ground terminal and AC output is taken out with a male

Plug.

The frequency meter is provided to see if the frequency of
generated power shows 50 Hz (or 60 Hz). DC output is

taken out from the red (positive. +) and black (.negative. -)
terminals.

-11-

Fig. 7-3

7-2 ENGINE

7-2-l CYLINDER and CRANKCASE

The cylinder and the crankcase of the engine are of an one-piece aluminum die-cast design. The cast iron cylinder liner is
cast-fitted inside the cylinder. Both the intake and exhaust ports are positioned at the lateral side of the cylinder and these
ports are formed by using a mold with die-cast cores. The crankcase has its joint face located on the generator side.

7-2-2 MAIN BEARING COVER
The

main bearing cover is aluminum die-cast and is mounted on the generator side. By removing the main bearing cover.

the interior of the engine can be inspected.

7-2-3 CRANKSHAFT

The crankshaft is constructed of forged carbon steel. The crankpin is induction-hardened and has a pressure-fitted crank
gear located on the generator side of the engine.

7-2-4 CONNECTING ROD and PISTON

The connecting rod is constructed of forged aluminum alloy with both the major and minor ends utilized as bearings.

The oil scraper and cap for the major end are cast together. The aluminum alloy casting piston has two compression rings

and one oil ring.

7-2-5 CAMSHAFT

The camshaft is constructed of special cast iron and has intake and exhaust valve drive cams. each of which engages with the
cam gear. An exclusive aluminum alloy is used on each end of the camshaft in the place of bearings.

7-2-6 VALVE ARRANGEMENT

The intake valve is installed at the oil port side and the exhaust valve at the generator side.

7-2-7 CYLINDER HEAD

The cylinder head is die-cast aluminum and has Ricardo type combustion chamber featuring greater volume capacity for
improved combustion efficiency. For easier spark plug maintenance. the cylinder head is positioned at an angle to allow
greater access.

7-2-8 GOVERNOR

The centrifugal weight type governor

ensures

constant engine speed, regardless of load fluctuations (the governor is mecha-

nically linked to the governor drive gear).

-12-

7-2-9 EXHAUST FAN COOLING SYSTEM

Instead of blowing outside air on the engine. the Exhaust Fan Cooling System of this generator intakes the cool air and
forces the hot air outside from one outlet.
This keeps the body temperature lower for greater safety and extends service life.

7-2-10 LUBRICATION SYSTEM

The moving and sliding parts inside the engine are lubricated with the oil scraper fitted on the connecting rod. As the
crankshaft rotates, the connecting rod moves up and down and the oil scraper moves in conjuction with the connecting rod
movements to scrape up oil in the crankcase and splash it over the surfaces of the moving and sliding parts.

7-2-l

1 IGNITION

A flywheeh’magneto ignition system is employed with the ignition timing set at 23” before top dead center. The magneto is

composed of the tl)wheel and ignition coil with the fll-wheel mounted on the rotor shaft. The ignition coil is fitted to the
front housing.

7-2-l 2 CARBURETOR

The horizontal suction type carburetor is adjusted so that the engine will provide excellent starting. good acceleration.
low fuel consumption. and superior output [for details concerning carburetor construction. see the paragraph dealing with
carburetor construction and disassembly/assembly (Page49)]

7-2-13 AIR CLEANER

The air cleaner is a semi-wet type and contains a sponge element.

- 13-

8. DESCRIPTION OF MAIN COMPONENTS OPERATION

8-1 ELECTRONIC IGNITION SYSTEM (Solid State Ignition System)

The electronic ignition system features a polver transistor as the current control element. Therefore. the ignition system is
an electronic contact point-free type that operates with the po\ver transistor impulses controlling the current. This system
also called TIC (transistor igniter circuit) is virtually free of ignition failure which generally results from contamination of
the contact points. a typical problem vvrth contact type ignition systems.
Because this ignition system has no contact points. it is not affected by moisture. oil. dust. or other contaminants. 4s a
result. this electronic ignition system ensures sure and positive ignition lvith reduced maintenance.
The TIC mechanism consists of a transistor-mcorporated ignition coil and a permanent magneto built-in flywheel which is
pressure-fitted on the rotor shaft of the generator.

I

//////

IGNITION COIL

IGNITION

TIMING

DETECTING
CIRCUIT

FLYWHEEL

COOLING FAN

PLUG

Fig. 8- 1

1) When the permanent magneto built-in flywheel starts rotating. power is generated in the primary coil of the ignition
coil and current tlows to the resistor @ _
From the resistor, current flows to the power transistor. RYth this current. the power transistor turns on. releasing

current I(@ Thrs stage corresponds to the closmg of contact points.

2) As the tlywheel comes to the point of ignition. the ignition timing detecting circuit is activated while the current @
is flowing through the circuit.
When the ignition timing detecting circuit is activated. the signal transmitter transistor actuates hzith current 8 flow­ing. \Vhen current ,$$ starts flovving.

current s flowing through the power transistor is cut quickly. As a result. high
voltage is produced in the secondary coil and this voltage is applied simultaneously to the spark plug which ignites for
ignition. This stage corresponds to the opening of contact points.

-14 -

c

.I

8-2

GENERATOR OPERATION

INITIAL EXCITATION
PERMANENT MAGNETO

FIELD COIL i

ROTOR

: I

RESIS

-----

DIODE

8-2-l

1)

GENERATION of NO-LOAD VOLTAGE

2)

3)

41

When the generator starts turning the permanent magneto built-in to the flywheel generates@ 1 to 2\’ of AC voltage

in the main coil and also generates 1 to 4 of AC voltage in the condenser coil.
The capacitor coil is connected to a capacitor so when a voltage is applied to the condenser coil. minimun current

@ flows in the condenser coil. At this time, minimum flus is produced. vvith which the magnetic force of the rotor’s
magnetic pole is intensified. When this magnetic force is intensified. the respective voltages in the main coil and
condenser coil rise. Current 1s flowing in the

condenser coil increases. with the magnetic tlux densit)- of the rotor’s
magnetic pole increasing further. Also. the main coil voltage and condenser coil voltage increases. These voltages
continue rising as this process is repeated.

As current flows in the condenser coil. the magnetic flux density changes. DC voltage is induced in the field coil when
the magnetic flus density varies. Successively. DC current is rectified bl the rectifiers connected to both ends of the
field coil. and DC current @ flows in the field circuit.

With this current. the rotor core is magnetized. allowing the
generator to output steady voltage.
When generator speed reaches 2000 to

2300 rpm (50 Hz specification) or 3000 to 3300 rpm (60 Hz specification). the
current in the condenser coil and field coil increases sudden&. This acts to stabilize the respective coil output voltages.
If generator speed further rises to the rated v-alue. the generator output voltage will reach the rated value.

STATOR

RECEPTACLE

MAIN COIL

CONDENSER

COIL

CONDENSER

L

------

A

Fig. 8-2

8-2-2 VOLTAGE FLUCTUATIONS UNDER LOAD

When load current -s flows from the electric equipment to the generator. the magnetic flux which is produced as current

.s flows in the main coil. this serves to increase current ‘$ flowing in the capacitor coil. With current @increased. the
magnetic flux density across the rotor core rises. As a result. the current flowing in the field coil increases, and the genera­tor output voltage is prevented from decreasing.

-15-

8-2-3 DC OUTPUT

DC output is taken out from the main coil and is fed to the
diode at which time the output undergoes full-wave recti­fication prior to being supplied to the load connected to
the generator. The diode rectifier works to allow the cur­rent to tlow in @ direction but does not allow the current
to flow in s direction as shown in Fig. S-3.

Fig. 84 shows the DC output circuit of the generator.
DC voltage is generated in the main coil; when the voltage
in A is higher than that in C. current !~flows in the direc­tion shown in the figure while no current flows between C
and B because current is cut off by the diode

D2.

Contraq
to the aforementioned, if the voltage in C is higher than that
in

A,

current a flows in the direction as sholvn in the
figure. with no current flowing between A and B. This is
because the diode

Dl

cuts off the current between A and

B.

As a result. voltage generated between the DC terminals has
a waveform with t\vo peaks in one cycle. as in the case of
the output waveform shown in Fig. 8-5.

BETWEEN A AND

B

BETWEEN C AND

B

=w=

MAIN B
COIL

Fig. 8-3

Dl

+

Fig. 8-4

OUTPUT WAVEFORM

CURRENT 0
FLOWING

CURRENT @
FLOWING

BETWEEN

BETWEEN

AAND

B

CAND

B

Fig. 8-5

- 16 -

9. OPERATIONAL LIMITS OF THE GENERATOR

9-1 AC OUTPUT:

Electric appliances normally have rating labels, showing the rated voltage. frequency. power

consumption (input power).
and other listings.
The input power specified on such labels is what is required to drive the appliance.
When an appliance is to be connected to the generator. the power factor. starting current. and other factors of the appli-

ance must be taken into account.

9-l-l NET RESISTANCE LOAD:

Incandescent lamps. electric heaters, etc.. can be run off the generator if its capacity matches the total of the respective

appliances. Each of these appliances normally have a power factor of 1 .O.

Example :

This generator can provide enough power to operate five 1OOW incandescent lamps.

9-l-2 ELECTRIC APPLIANCES WITH A POWER FACTOR LESS THAN 1.0:

Fluorescent lamps and mercury lamps normally have a low po\ver factor. Therefore. the generator is required to generate
approximately 1.2 to 2 times the power consumed by each load appliance.
Example: With this generator. three to five 8OW mercury lamps can be operated.

9-l-3 MOTOR LOAD:

Generally. motors require a large starting current every time they are started. Therefore. when the generator is

used

to run
a motor, the greatest motor starting load is applied.
The rates of power supply which the generator is required to produce for motor loads. are categorized into two sections.

depending on the types of motor and load conditions at time of starting.

1) Motors (mainly rectifier motors) used for electric drills and similar devices:
Sormally, the motors used for electric drills and similar appliances require the generator to produce approximateI>- I.1
to 3 times the power consumed at time of starting.
Example: To drive a 2OOW electric drill. a generator with capacity of about 300 to 600W is necessary.

2) Motors (mainly induction motors) used for pumps and compressors:
Pump and compressor drive motors require the generator to produce 3 to 5 times the power consumed when they are
running. at time of starting. This is because these motors have loads w-hen the>- start.
Example: To drive a 2OOW submersible pump. a generator with a capacity of approximately 600 to IOOOW is neces-

sary.

-17 -

9-l-4 IN THE SITUATION THAT POWER CONSUMPTION IS NOT SHOWN ON THE RATING PANEL:

Occasionally. the rating panel of an electric appliance does not carry its power consumption but only shows the mechanical
equivalent to the power consumption. In such a situation. it is necessary to calculate the power consumption of the device
involved. Depending on the types of load. the calculated power consumption is adjusted according to paragraphs 9-l-l
through 9-I-3 above.

(Power consumption) = (Mechanical equivalent of device) + (Efficiency)

Efficiency

Motors:

0.6 - 0.8

Fluorescent lamps: 0.7 - 0.8

Example :

A

4OW fluorescent

lamp with a lighting output of 40W and assuming that the power consumption of this lamp is

0.7, the power consumption is calculated as follows:
40 + 0.7 = 57W

Further, as per paragraph 9-l-2, the said power consumption is multiplied by a factor of 1.2 to 2. producing a
power consumption of 70 to 11 SW. Therefore. with this generator, four to seven 40W fluorescent lamps can be
used.

Example: In the case of a 2OOW motor. the mechanical equivalent of the motor is 200W. Assuming that the efficiency of

the motor is 0.7. the power consumption is calculated as 200 f 0.7 = 285W. Similar to the above, the calculated
power consumption is then multiplied as per paragraphs 3-1) or 3-2). taking into account the types of motor
and starting conditions. The table below shows the range of loads applicable to this generator.

Electric devices

Range of workable loads

50 Hz 60

Hz

I

Incandescent lamp, electric heater,

etc.

up to 4oow

up to 5oow

I

Fluorescent lamp, mercury lamp, etc. Up to approx. 300W Up to approx. 400W

I

Motor-driven tools etc.

I

Up to approx. 300W Up to approx. 350W

Pump and compressor drive motors

I Up to approx. 150W /

Up to approx. 200W

Table 9- 7

NOTE 7: With motor-driven tools and the motor-driven pumps and compressors specified in paragraphs 9-7-3

and 9-l-4, the generators of the said capacities are required only when starting the motors of the
respective appliance. Once the motor has started, the power which the generator is required to
supply to the motor decreases thereafter to a level approximately 1.2 to 2 times the rated power
consumption .

Therefore, the surplus capacity of the generator may be used for other electric appliances.

NOTE 2: As for the motor-driven devices specified in paragraph 9- 7-3 and 9-l -4, the power requirement for

starting varies according to the types of motor and the load conditions at time of starting.

-

18-

9-2 DC OUTPUT

When the generator is employed to recharge batteries. care must be exercised about the specific gravity of electrolk-te rn
each batter\. case.

9-2-l MEASURING THE SPECIFIC GRAVITY OF ELECTROLYTE:

The specific gravity changes with temperature; therefore. it is converted to another corresponding to 20°C.

S20

= St + 0.0007 (t - 10)

where

S~J = Specific gravity corresponding to 20°C
SI

= Measured value

t = Temperature at time of measurement

9-2-2 REMAINING CAPACITY ESTIMATED WITH REFERENCE TO THE SPECIFIC GRAVITY OF

ELECTROLYTE:

c

I

Specific gravity

Remaining battery

I

(20°C)

(%I

Remarks

1.260

100

1.240 87

I

I

Good charged condition

1.220

75

I

Charging is necessary.

1.200

1.180

1.160

1.140

62

50

,

Immediate charging

is

necessary.

37

25

Table 9-2

9-2-3 BATTERY CAPACITY:

The battery capacity is expressed in units of ampere-hour (AH). One AH stands for the capacity capable of providing one

ampere of current for one hour.

-19-

9-3 SIMULTANEOUS USE THE AC/DC OUTPUT

If you use the AC’DC output simultaneously in this generator, be careful not to exceed the total power consumption.

50 Hz

below 3OOW

60

Hz

below 3OOIV

NOTE: Max. output of DC is 1OOW /12V x 8.3A).

9-4 WIRE LENGTH

When long Lvires are used between the generator and a load, the resistance of each wire increases and a voltage drop occurs.
Consequently. the input voltage to the load declines and occasionall!- damages the load.
Exercise caution Lvhen deciding on wire length. For reference. the table below shows the voltage decreases that occur in

100 m (300 ftt) long wires with different cross sectional areas and varied resistances.

Cross

sectional

area

Allowable

current

No. of con-

ductorsl

conductor

Resistance Current

diameter

mm’

A

No./mm

,0,/l

OOm

1A ’ 3A 5A 8A ’ 10A 12A 15A

0.75

7

30/O. 18 2.477

2.5U 8U

12.5U - ‘- - ;-:
I

:

1.25 12 5OiO.18 1.486

l.5U 5u

7.5u l2U 15u

18U I -

, 8

t

2.0 17

3710.26

0,952 1u 3u

5U 8U

1 1ou

; l2U

15u 0”

8

3.5

23 4510.32 0.517 -

1.5U ’ 2.5U ’ 4U 5U 6.5U - 7.5U ; <
I

>

5.5 35 7OiO.32 0.332 -

1U 2U : 2.5U

3.5u ; 4u 5u

L I

Table 9-3

- 20 -

10. MEASURING PROCEDURES

AC VOLTMETER

DC VOLTMETER

10-l METERS

10-1-l VOLTMETERS

Both AC and DC voltmeters are nesessar! .
The approximate AC voltage ranges of the voltmeters to be
used for various types of generators are as follows:

0 to 1 SOV: Type with an output voltage of 110 or

12ov

0 to 300V: Type with an output voltage of 220.230

or 21OV

Fig. 70-l

10-l-2 AMMETER

Both AC and DC ammeters are necessary.
The AC ammeter must have a scale range from 0 to ap­proximately 10A.

AC AMMETER

DC AMMETER

The DC ammeter must have a scale range from 0 to ap-

proximately 15A.

Fig. 10-2

10-l-3 FREQUENCY METER

The frequency meter must have a scale range from 45 to ap-

proximately 65 Hz.

NOTE: Note the range of input voltage of the frequency
meter.

Fig. 70-3

-2l-