Winco 700-11 User manual

I
OWNER'S MANUAL
..
ILMSBRUCTIOFIIS
A. C. GENERATORS
8 Model 700 Series
Model 1800 Series
I
Model 3030 Series
:.-
I
MODEL 1800 MODEL 700
I
I
If any correspondence is required regarding these generators, always be sure to
furnish the model number and serial number stqmped on the generator nameplate.
I
WINCHARGER CORPORATION 1
SIOUX CITY 2, IOWA, U. S. A.
Form SR214, Part No. 20757
I

INSTALLATION AND OPERATION INSTRUCTIONS
FOR WlNCO A.C. GENERATORS
Model 700 Series
Model 1800 Series
Model 3030 Series
MODEL WATTAGE SPEED ENGINE
700-11 700-1 500 700 3600 3460 1.04 Briggs
& Sir. 6 2.0
700-12 700-2 500 700 3600 3460 1.04 Clinton B700 2.0
700-13 700-3 500 700 3600 3460 1.04 Continental AU7B 2.0
700-14 700-4 500 700 3600 3460 1.04 Lauson
RHS 2.n
1800-11 1800-1 1000 1800 3600 3460 1.04 Briggs&Str. 8 2.5
1800-12 1800-2 1250 1800 3600 3460 1.04 Clipton D-1100 3.1
1800-13 1800-3 1350 1800 3600 2975 1.21 Cushman M6 3.0
1800-14 1800-4 1250 1800 3600 3460 1.04 Lauson
TLW 3.0
1800-15 1800-5 1350 1800 3600 2975 1.21 Wisconsin
ABN 4.6
3030-11 3030-X 2000 3000 3600 2975 1.21 Briggs& Str.
" 14 5.1
3030-12 3030-X 2000 3000 3600 2975 1.21 Briggs&Str. 23 8.3
*Nominal wattage is at 1.0 Power Factor. All. units are rated at 115 volts, single
phase,
60 cycles per second. The voltage varies with the speed at which the gener-
ator
is driven and on the load being used.
The generators only for above units are referred to as Model
700-0, 1800-0, and
3030-0 respectively. In the instructions all Model 1800's are referred to as 1000 watt.
Models
3030A and 303OB
are for tractor belt drive-generator specifications are
same as for 3030-X.
WINCHARGER CORPORATION
Sioux City 2, Iowa, U. S. A.

TABLE OF CONTENTS
I. INTRODUCTION 4
A. Testing
B. Unpacking
C. Guarantee
11. INSTALLATION -------------- ........................ 4
A. Portable Use
B. Transfer Switch
C. Flexible Cord
111. FRAMES---------------------------------------- 5
A. 500-1000 Watt Models
1. Engine Base Holes
2. Mounting
3. Belt Tightening
4. Checking Lineup
B. 2000 Watt Models
1. Pulleys
2. Mounting
3. Belt Tightening
4. Checking Lineup
IV. GENERATORS ........................................ 6
A. Design
B. Performance characteristics
C. Speed
D. Overload Protection
V. ENGINES---------------------------------------- 7
A. Lubrication
B. Manuals
VI. POWER REQUIREMENTS .............................. 7
A. Engine Size
B. Altitude-Temperature
VII. USE OF A.C. MOTORS ................................. 7
VIII. MAINTENANCE ....................................... 8
X. PARTS LIST ........................................... 10
XI. TRACTOR DRIVEN UNITS ............................. 10
XII. ACCESSORIES 12

Models 700, 1800,3030
8. INTRODUCTION
Each generator is carefully inspected at
the factory and "run-in" until the brushes
are satisfactorily seated. The unit is then
carefully checked for correct output under
average operating conditions. NO GENER-
ATOR IS SHIPPED UNLESS IT PRO-
DUCES ITS FULL RA'IYCD CAPACITY,
NOR UNTIL IT HAS PASSED RIGID IN-
SPECTION TESTS. If uwon installation a
new generator does noi work properly,
check all of the electrical connections and
the generator speed before concluding that
the generator is not performing satisfact-
orily.
when unpacking the machine, be sure to
inspect it carefully to see that no damages
occilrred in transit. If damages are noted,
notify the transportation company im-
mediately and have them write the
nature of the damages on the freight
bill, so that a claim can be filed if necessary.
Each AC generator is guaranteed to be
free from defects in workmanship and
material arising in connection with normal
usage for a period of one year, provided
that the owner returns his guarantee reg-
istration card within 10 days after pur-
chasing the unit. Fill in the information
requested on the registration- card and
return it,
so the guarantee can be issued
to you.
etc. directly into the outlet terminals. The
outlet box is equipped with lock-type re-
ceptacles which prevent the plugs from
working loose.
To operate permanently connecte~
motors, etc. on a standby basis, provision
must be made to prevent the generated
current from "feeding back" into the power
line where it could be a hazard to linemen
and other users.
ALL WIRING IS TO BE DONE IN CON-
FORMANCE WITH -NATIONAL ELEC-
TRICAL CODE AND WITH STATE AND
LOCAL REGULATIONS.
The conductor from the transfer switch
to the generator can be made of No.
14 type
S cord for distance up to 25 feet. Always
use the twist-lock plug for making these
connections permanently.
When starting the generator, turn off the
load or reduce it. If too many light bulbs
are left on, the generator may fail to build
up voltage.
When a three pole double-throw switch
is connected to a 115-230 volt system as
shown in Figure
1, the current from the
generator is available on both main
branches. Any 220 volt appliances connect-
ed to the circuit will remain inoperative.
If the owner wants to use only part of the
electrical circuits, a two-pole, double throw
switch can be connected in one or more
of the branch circuits as shown in Figure 2.
So many different methods of wiring are
encountered in the field that no specific
II. INSTALLATION transfer switch recommendation can be
given. However, an electrician who thor-
when using the unit as a portable gen- oughly understands the problem should be
erator, merely plug the power tools, lights, obtained to make the installation.
To Load
I- -----
I
To
-
(Neutral) I
I Generator
Meter I_
-
I
-
-
7 I
I.
I I
To Load
----
I
To
i
I I To
(Neutral)
I I Generator
Panel
-
I
-
-
L ---------- 1 +
Figure 2

D
43
@ @ 63 a
00 80 a@O 0
8 8
0
80
O@ 0
@@
@, oa
Figure 3
Ill. FRAME
All 500 watt and 1000 watt models have
the necessary holes for mounting various
types engines. Figure
3 shows the holes
which are used for mounting the follow-
.ng types of engines:
Holes Type Engine
A
Briggs & Stratton No. 8
A
Briggs & Stratton No. 6
A Continental 7B
required. The belt should deflect about
B
?/4" when a pressure of 6 lbs is applied
Clinton D-1100 (A base)
midway between the pulleys. After the
B Clinton B-700 (New base) proper position has been determined, in-
C Cushman M6
stall the three remaining bolts in the gen-
D Lauson TLH
erator base and tighten securely. Then re-
E Wisconsin ABN
check the belt lineup using a straight edge
across the beIt pulleys as shown in Figure
F Lauson RSH 5. Finally replace the belt guard.
G Clinton D-1100 (Bbase)
G Clinton B-700 (Old base)
2000 WATT MODELS
The V belt and two engine pulleys are
furnished with units shipped without en-
gines. One pulley has a
%" bore, and the
other
1" bore. Either ,one or the other
pulley will fit practicafly all engines, but
if it does not the pulley will have to be
bored to suit or a bushing will have to be
installed.
To mount the engine on the frame pro-
ceed as follows: Loosen the bolts on the
Two sets of are drilled for mount-
adjustable rails shown in Figure 6. Mount
ing the generators on the cross members.
the engine with the four bolts furnished,
The 500 watt units use the set of holes
leaving the nuts loose. Using a large screw-
nearest the belt guard. driver or small
b
To install the engine on these frames,
proceed as follows: Remove the belt guard;
mount. the engine in place and secure it
rigidly with the four bolts furnished. Re-
move three of the bolts holding the gen-
erator to the frame, leaving only one of
them in posilioil as shown in Figure
4. The
generator can then be pivoted on the single
bolt to install the belt.
After the belt is put on the pulleys,
pivot the generator so the generator shaft
IS parallel to the cross braces. If it is found
that the belt is too tight or too loose, the
pivoting bolt should be loosened and the
generator moved forward or backward as
5

back to tighten the belt as shown in Figure
7. The belt should deflect about '/4" when
the pressure of
7 lbs. is applied.midway
between the pulleys. Recheck the lineup
on the belt with the straight edge, as shown
in Figure
5. If necessary, the pulley on
the generator can be moved slightly to
effect proper lineup. Be sure to tighten
the Allen screw holding the generator pul-
ley in place.
IV. GENERATORS
DESIGN
These generators are self-excited AC
types with the commutator located at one
end (See Figure
8) and the slip rings lo-
cated at the opposite end of the armature.
(See Figure 9-The 500 watt and 2000 watt
models do not have klixon shown). There
are both a DC winding and an AC winding
on the armature; the only purpose of the
DC winding is to produce "direct" current
to energize or excite the field coils-see
V
Figure 9
schematic diagram,.Figure 10. The drive
pulley is on the commutator end and the
AC box is on the opposite end. The proper
direction of rotation is indicated by an
arrow on the end of the generator.
Figure 10
Performance Characteristics
Providing that constant generator speed is
maintained, the output voltage remains
reasonably constant from no load to full
load. No rheostat is necessary to adju;'
the voltage.
The engine governor must be working
properly to maintain reasonably constant
voltage. When lights or appliances are
turned on, the generator must produce
more electric power. The engine must con-
sequently supply more power to the gen-
erator.
No engine maintains perfect speed
regulation, particularly as it approaches
a fully loaded condition. The gen-
erator speed must be 3600 revolutions per
minute to produce 60 cycles per second at
rated voltage. However, since there is a
slight speed variation it is best to operate
the unit at a slightly higher speed with
no load connected. Then, as lights or
appliances are used, without resetting .the
engine throttle the output will be at, or
perhaps slightly below, the specified
voltage' and frequency. If necessary
the throttle setting can be increased slight-
ly if full rated output is desired continu-
ously.
If the engine governor is sluggish or does
not work properly, its speed will decrease
considerably when the electrical load is

increased. The resulting decrease in gen-
erator speed may cause lights to be dim
V. ENGINES
and appliances to be lacking in power.
(See engine instructions regarding gov-
ernor).
On an average the frequency and voltage
will drop approximately as shown in Fig-
ure 11 c;n these units when driven with
engines normally supplied. Larger engines
which maintain better speed control tend
to maintain better voltage stability.
Speed
-
The speed of the generator is extremely
important and should never be below 3450
rpm. If the generator speed is too low, it
will not produce its rated output and, if
fully loaded, will heat excessively. If low
voltage under load is encountered, be sure
to check tine generator speed with an ac-
curate tachometer before concluding that
the generator is defective.
The generators supplied with engines
have the governor set to produce a gen-
erator speed of 3600 rpm at approximately
60% of rated output and should not be
readjusted unless it is done with an ac-
:urate tachometer. Excessive speed not
only produces added strain on generators,
but abnormally high voltage also materi-
ally shortens the life of the elgctrical de-
vices used. Even though generators may
be equipped with klixon thermostatic over-
load switches or fuses, they can be over-
loaded if run at excessive swed.
Overload Protection
The 1000 watt models are equipped with
klixon thermostatic switches. If the switch
opens due to overload, the generator should
be allowed to cool for several minutes, and
the red button adjacent to the outlet box
pressed down. If the generator has been
allowed to cool sufficiently, the switch can
be snapped back in place, thus completing
the circuit.
ENGINES ON AC GENERATORS ARE
SHIPPED WITHOUT OIL. Be sure to fill
the crankcase to the proper level and fill
the gasoline tank before starting. See en-
gine instruction book for grade and type
of oil.
Engine operating and maintenance man-
uals furnished by the engine manufac-
turer are supplied with all units shipped
with engines. Be sure to follow these in-
structions. If the generator was obtained
separately, also be sure to obtain the en-
gine manual. In case of engine trouble
contact engine manufacturer's local repre-
sentatives for assistance or repair parts.
V1. POWER REQUIREMENTS
The maximum wattage for each of the
units covered by this manual is given on
Page 2. Engines of different manufacture
and of larger capacity can be used, but
the electric load should not exceed fhe
maximum wattage shown for sustained
operation. Smaller engines than shown on
the table on Page 2 can be used for any
model, but the electric load must be re-
duced proportionately. For example, on
the 2000 watt mddels any engine from one
H.P. can be used. Such engines, however,
would not have adequate power to furnish
the current required to start motors. (See
"Use of
AC Motors").
If the engine used to drive the generator
does not have sufficient power to drive the
generator in areas of high altitude and
high temperature, it is important to re-
member that engines lose power at the
rate of about
3% for each 1000 feet of
altitude and 1% for each 10 degrees above
60 degrees Fahrenheit at sea level. In addi-
tion to this, a good quality fuel must be
used to get the full rateh output from any
engine. Most engine manufacturers rec-
ommend that the engine load should not
exceed
85% of rated horsepower.
VII. USE OF A.C. MOTORS
The maximum rated wattage of the gen-
erators for starting motors is given in the
tabie on Page
2. For the same motor size,
split-phase motors such as are normally
used on washing machines, refrigerators,
etc., require more starting current than
others such as capacitor-start and induc-
tion-repulsion types. In general the power
requirements for starting and running vari-
ous sizes of electric motors is approximate-
ly as follows:
H.P. Running Starting
1/8 200
The 500 watt models are not equipped l/6 300 900-1500
with any type of overload protection. The 1/4 400 1200-2000
1/3
load line should be fused using fuses of 450 1350-2250
suitable type and capacity. 600 1800-3000

The motor starting current is limited by
the engine as well as the generator. It will
be observed from the table that the 500
watt models are recommended for only
small electric tools and appliances using
universal type motors of 1/8 H.P. or less.
The 1000 watt models, when equipped
with an engine of adequate power, can be
expected to start 1/6 H.P. motors and
some 1/4 H. P. types. The 2000 watt mod-
els, when equipped with an engine of ade-
quate size, will start electric motors up to
and including 1/2 H.P. For maximum
starting capacity larger motors such as the
Briggs & Stratton Model 23 should be
used.
Motors usually have a power factor
of approximately 70%. That is, a motor
that uses 700 watts at 110 volts actually
requires as much current (amperes) as
1000 watts (700 + .TO) of light bulbs or
other loads with 100% power factor. This
fact must be taken into consideration when
considering the maximum motor load a
generator will handle.
VIII. MAINTENANCE
A. BRUSHES
Check the brushes every 500 hours of
operation. They are easily removed by re-
moving the brush holder caps. The spring
and pigtail lead is supplied as an in-
tegral part of the brush. When the brushes
have worn down to approximately
'/z
inch, they should be replaced.
B. DISASSEMBLY
These generators can easily be disas-
sembled for inspection. (See Figure 8 and
9). Merely remove the "thru bolts" and
tap the end castings outward, using a
light hammer and chisel applied to a pro-
jecting part of the casting.
the inner race. Never exert any pressure
on the outer race when installing a bear-
ing on the shaft.
IX. LOCATINGTROUBLE .-
If the wiring and speed are correct ana
the unit does not generate properly, first
disconnect the load, then test the
AC end,
then the DC end and finally the armature.
These step by step tests are given in the
following paragraphs.
A. A.C. END TESTS
With the generator operating at 3600
rpm disconnect all external wiring by re-
moving the plug or cap from the AC out-
lets. Use a voltmeter at the AC outlets to
determine whether or not
AC voltage is
present under those conditions. (If no
voltmeter is available, an ordinary 110
light bulb can be used with fair success).
1. If the correct voltage reading is ob-
tained
on open circuit, that is with all loads
removed, the generator is very likely over-
loaded or there is a short in the external
circuit. Decrease the load or locate and
correct the short.
2. If low or no AC~oltageis obtained at
the outlet terminals,
continue to run the
generator on open circuit and check the
AC voltage at the brushes. This can be
done by unscrewing the brush caps one-
half way asshown in Figure 12,using a pair
of sharp prods of the voltmeter to connect
directly to the brush holders; about 120 volts
should be obtained at this point with the
generator running at normal speed. If the
correct AC voltage is obtained at the
brushes but not at the AC outlets, thert
must be an open circuit between the
brushes and outlets.
C. BEARINGS
Ball bearings are standard equipment on
all Winco AC generators and are packed
with grease before assembling; no further
greasing is required. If considerable play
is present in the bearing, it should be re-
placed with a new one. Whenever remov-
ing old bearings from the shaft of a de-
fective armature use a bearing puller.
Failure to do so may result in completely
ruining the bearing.
Premature failure can be caused by
running the drive belt too tightly. If new
bearings are installed, be sure to press
them against the shaft shoulder, so that
when the armature is installed there is a
small amount of end play. In installing
new bearings, they should be pressed down
with an arbor press or forced on by using
a piece of pipe approximately the size of
Figure 12

a. On 1000 watt models allow the gen-
erator to cool several minutes and
push down on the red button. If the
klixon had opened, this would again
close the circuit and voltage should
be available at the outlet terminals.
(Some Model 1800s have automatic
reset klixons which snap shut when
the generator has cooled sufficiently).
If an open circuit in the klixon is sus-
pected, check with an ohmeter.
b. On 2000 watt models install a new
fuse since the fuse may have blown.
If an open circuit is detected between
the A.C. brushes and outlets, but the over-
load protective device is satisfactory, cafe-
fully examine all leads and connections.
Correcting the open circuit should restore
the unit to operation.
B. D.C. END !IZSTS
1..If no voltage is obtained at the AC
brushes, check the DC end to make sure
that the field coils are being energized.
With the generator running at normal
speed, unscrew one of the
DC brush caps
and allow the brush to move back and
forth so that it makes and breaks contact
with the commutator. If the DC part of
the generator is working properly, some
arcing or flashing will be obtained at the
generator brush when the field circuit is
broken; ,a few seconds of time must be
allowed for the voltage to build up before
repeating the test. In a darkened room this
arcing can be seen by reflection through
the bottom ventilation holes in the gen-
erator. If there is too much light present,
use a mirror or look directly through the
ventilation slots to determine whether or
not arcing is produced when a brush is
lifted. A slight difference in the tone of the
generator will also be observed as the
generator is allowed to build up a voltage
if the
DC part of it is working correctly.
2. If the generator builds up a satisfac-
tory DC voltage but no
AC voltage is pro-
duced, very likely there is a defect in the
winding on the armature. Have it checked
at a generator repair shop.
3. If the DC end'is'found not to be work-
ing properly, proceed as follows:
a. If new DC brushes have been'installed,
perhaps they are not seated properly.
Remove the brush caps and insert a
small stick of wqod or plastic through
the brush springs, so that the top of
the brush can be reached in order to
force the brush down firmly against
the commutator as shown in Figure
13.
After running a few minutes if the
generator builds up voltage, put the
brush caps back in the proper posi-
tion and the generator should work
properly.
b. If the DC brushes have been properly
seated, it is possible that they are
sticking. Remove them from the brush
holder and examine the holders for
roughness or binding. Although it is
improbable that the brushes will stick
because of being oversize, a small
amount can be filed off the edges if it
is found that they are sticking in the
brush holders.
c. If the brushes are found to be making
satisfactory contact .,with the armature
but no
DC voltage is built up to ener-
gize the field coils, stop the generator
and check the field circuit with a test
light. This test light consists of two
insulated test prods, a male plug, and
a light bulb connected as shown in
~ig&e 14. CAUTION: BE CAREFUL
NOTTOTOUCHTHECONDUCTORS
AT THE END OF THE PRODS SINCE
THEY ARE CONNECTED TO THE
POWER LINE. WHEN USING THE
TEST LIGHT ON ANY EQUIPMENT.
ALWAYS MOUNT IT O~ A WELL:
INSULATED BASE SUCH AS DRY
WOOD, GLASS, OR RUBBER. DO
NOT TOUCH THE OBJECT WHILE
IT IS BEING SUBJECTED TO TEST.
To A.C. Power Lines Insulated Test Prods
Figure 14 Bulb

d. To test .the field circuit proceed as fol-
lows: Remove the brush holder caps
and brushes. Connect one test prod to
the metallic part of the brush holder.
Similarly connect the other test prod
to the other brush holder.
If the bulb
lights, the field coils are probably o.
k.
If the bulb does not light, there is an
oper, circuit in the field. Disassemble
the generator and check the connec-
tion where the two coils are connected
together. Tighten or resolder any con-
nections which are found loose.
If no open circuit is present, check
them for grounds by touching one test
prod to the metallic part of the brush
holder and the other part to the gen-
erator frame. The test bulb should not
light. If it does, there is a short be-
tween these two parts. Examine the
brush holder-usually causes of shorts
in this part of the circuit are readily
'
apparent, and the difficulty can be
easily corrected by cleaning out the
foreign material, such as carbon,
grease, dirt, etc., or by taping the
shorting parts or repositioning the
field coil terminals.
C. ARMATURE
If no troubles can be located in either the
AC end or DC end, very likely there is a
defect in the windings of the armature. To
test the armature special equipment is re-
quired; this should be done in a gener-
ator service shop.
X.
PARTS LIST FOR WlNCO A.C. GENERATORS
MODEL 700, MODEL 1800, and MODEL 3030 SERIES
Model No. Engine Engine
Model Engine Type Without Pulley Pulley Belt
Engine Key
Briggs & Stratton $6
Clinton B-700
Continental 7-B
Lauson RSH
Briggs & Stratton $8
Clinton D-1100
Cushman M-6
Lauson TLH
Wisconsin ABN
3030-11 Briggs
& Stratton $14 *3030-X 20247 20299 20563
3030-12 Briggs
& Stratton $23 *3030-X. 20247 20299 20563
*20284 Pulley is also supplied with model 3030-X and 3100-X

Model 700 Model 1800
Model 3030 Description
20266 20290 20585 Armature
20268(set) 20260 20590 Top Field Coil
20260-1 20590-1 Bottom Field Coil
SLIP-RING END (A.C. OUTLET END) PARTS
5367 *20510 20510 A.C. Brush (2 req'd)
5065 "25099 25099 Brush Holder Cap
8645 *20509 20509 Brush Holder
6383 6383 6383 Brush Holder Set Screw
6211 6211 6211 Bearing
7227 7227 7227 Oil Slinger
6532 6532 6532 Shim
7924 7924 7924 Fan Baffle
---- 9775 ---- Iflixon Thermo Switch
- - ....
---- ---- 20577 Fuse Fustron
9706 9706 9706 Twist Lock Receptacle
20511 20511 20511 Twist Lock Cap
---- ---- 4667 Fuse Receptacle "
---- ---- 9978 Voltmeter
----
---- 20574 Voltmeter Receptacle
8617-1 8617 20582 End Bracket
*Model 1800 with serial numbers below 1360 uses same brushes, brush
holders, and caps
as Model 700.
D.C. END (PULLEY END) PARTS
7978 7978 D.C. Brushes (2 req'd)
7948 7948 Brush Holder Cap
7944 7944 Brush Holder Assy.
6383 6383 Brush Holder Set Screw
4783 4783 Bearing
20410 20410 _ ,_ Oil Slinger
[email protected] 4- --A l?y~ndBracket
20288 20288 Gen. Pulley
20287 20287 Gen. Pulley Key
20330 20539 Belt Guard
MISCELLANEOUS PARTS
20305 20305 20570 Frame and Feet Assy.
20191 20191 20191 Rubber Foot
20235-1 20250-1 20600-1 Generator, less pulley
.Engine parts are available from engine manufacturer's local dealer or
distributor.
11

XI. TRACTOR DRIVEN UNITS
Model 3030A anu 3030B, shown in Fig-
ure 15, use the same generator as other
2000 watt models described in this book-
let. The model 3030A has a
4" diameter
flat drive pulley (Part No. 9974) for a belt
speed of 1885 feet per minute. The model
3030B is the same except it has a 5%"
diameter pulley (Part No. 9975) for a belt
speed of 2590 feet per minute. Any flat
belt from 335" to
6" wide tan be used.
The counter shaft is mounted on two
No. 9948 Pillow Block bearings and runs
at 1800 R.P.M. The counter shaft
V pull;
(Part No. 9743) is used to give a 2:l rat.
to the generator speed. This unit uses
V.
Belt No. 9741 and Generator Pulley No.
20288.
Figure 15
A. SPEEDY SHIFT BASE
B. VOLTMETER
All models described in this booklet de-
signed for mounting the engine directly.on
the frame can be quickly converted to por-
table use by the use of a "Speedy Shift" at-
tachment. This consists of wheels, axle,sup-
port brackets, handle, and the necessary
bolts, etc. Figure
16 qhows how the parts
are attached. The engine and generator
have been removed to show attachment
details. The dealer from whom you pur-
chased the unit can supply' the accessory.
A plug-in type voltmeter, Figure 17, is
supplied on Model 3030. It can be plugged
into the outlet box or into a regular wir-
ing outlet to maintain a close check on the
voltage.
It can also be supplied as an ac-
cessory on other models (Part No. 9978).