CZECH ELECTRONIC VOLTAGE STABILIZERS

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP82-00040R000300220017-5
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 9
• Document Creation Date: December 22, 2016
• Document Release Date: October 18, 2012
• Sequence Number: 17
• Publication Date: April 11, 1956
• Content Type: REPORT

Declassified in Part - Sanitized Copy Approved for Release 2012/10/18: CIA-RDP82-00040R000300220017-5
50X1 -HUM
Declassified in Part - Sanitized Copy Approved for Release 2012/10/18: CIA-RDP82-00040R000300220017-5
Declassified in Part - Sanitized Copy Approved for Release 2012/10/18: CIA-RDP82-00040R000300220017-5
Declassified in Part - Sanitized Copy Approved for Release 2012/10/18: CIA-RDP82-00040R000300220017-5
Declassified in Part - Sanitized Copy Approved for Release 2012/10/18: CIA-RDP82-00040R000300220017-5
ASAP
KRIVK ST 500 VA
ELECTRONIC A. C. VOLTAGE STABILISER
APPLICATION
This A. C, mains voltage stabiliser supplies a constant voltage notwithstanding
fluctuations of mains voltage and variations of load, It is designed for USG In
measurements, In photography (feeding of light sources, especially for colour
film), for maintaining constant speed of rotation of motors, constant Input for
furnaces, etc.
DESCRIPTION
The basic part of the 1012IK stabiliser is a choke, connected via an auto-
transformer between mains and load, The reactance af the choke varies In
accordance with the magnitude of its D. C. saturation, The value of the saturation
current depends, In its turn, on the output voltage, which controls the saturation
current electronically by means of a diode of special design,
The K412IK 500 VA stabiliser is housed In an Iron cabinet of rugged construction,
finished in black lacquer and provided with a carrying handle. All parts of the
unit form a single whole with the front panel, so that the whole stabiliser can
be easily removed from its cabinet ,and built into different kinds of equipment.
Dimensions and fixing holes conform to the standard specifications for panel
mounting equipment.
The mains cord is provided with a large-size plug. The stabilised voltage is
brought out through a standard socket outlet. Two insulated single sockets,
connected to the outlet socket are fitted on the front panel for attachment of
a control voltmeter.
Declassified in Part - Sanitized Copy Approved for Release 2012/10/18: CIA-RDP82-00040R000300220017-5
Declassified in Part - Sanitized Copy Approved for Release 2012/10/18: CIA-RDP82-00040R000300220017-5
rr
A terminal strip Is provided inside the unit, which is used for mains input
connections and stabilised output connections in case the stabiliser is mounted
in a rack.
ADVANTAGES
The output voltage of the 10121K stabiliser Is independent of load changes from
no-load to the nominal rating. Owing to the electronic circuit employed, even
large mains voltage surges and sudden increases of load are compensated for
practically instantaneously. Power frequency variations do not affect the action
of the stabiliser. The unit stabilizes within very wide input voltage limits. Its
action Is absolutely automatic and noiseless, no moving parts being used. Valve
wear has no appreciable influence on the accuracy of stabilisation. The wave
form of the output voltage remains practically sine-shaped.
TECHNICAL DATA
Input voltage: 190 to 240 V; other voltage ranges available to special order.
Power frequency: 45 to 65 c/s.
Output voltage: continuously adjustable from 210 to 230 V, or within other limits
according to order.
Wave form distortion: 5% max.
Time required for adjustment to sudden changes of mains voltage or
1/5 SOC.
Accuracy of output voltage stabilisation:
a) Effect of input voltage variations... 0.2%.
b) Effect of changes in load... 0.3%.
Valve complement (TESLA valves): 1 X RHT 1, 2 X AZ 1, 1 X 4654.
item
Model
Dimensions mm
Weight
kg
Order
No.
Price
width
height
depth
Electronic voltage
stabiliser (In cabinet)
Electronic voltage stabi?
user (without cabinet)
KRIIIK
ST 500 VA
510
485
380
315
210
200
29
26
This A. C. mains voltage stabiliser supplies a constant voltage notwithstanding
fluctuations of mains voltage and variations of load, It Is designed for use
in measurements, in photography (feeding of light sources, especially for
colour film), for maintaining the constant speed of the rotation of motors,
constant Input for furnaces, etc.
The basic part of the Kfkl2IK stabiliser is a choke, connected via an auto-
transformer between mains and load. The reactance of the choke varies in
accordance with the magnitude of its D. C. saturation, The value of the
saturation current depends on the output voltage, which controls the saturation
current electronically by means of a diode of special design.
The 0121K 250 VA stabiliser is housed in an iron cabinet of robust construction,
finished In black lacquer and provided with a carrying handle, All parts of
the unit are mounted on the back of the front panel, so that the stabiliser
can be removed from its cabinet as a single whole and built into different
kinds of equipment.
The mains lead is formed by a cord, 1,5 m long, terminating in a standard
plug. The stabilised voltage is brought out through a standard socket outlet.
Declassified in Part - Sanitized Copy Approved for Release 2012/10/18: CIA-RDP82-00040R000300220017-5
Declassified in Part - Sanitized Copy Approved for Release 2012/10/18: CIA-RDP82-00040R000300220017-5
A control knob for accurate adjustment of stabilised voltage Is fitted next to
the socket.
ADVANTAGES
The output voltage of the KAI21K stabiliser Is independent of load changes
from no-load to the nominal rating, Owing to the electronic circuit employed,
even large mains voltage surges and sudden Increases of load are compensated
for practically instantaneously. Power frequency variations do not affect the
action of the stabiliser, The unit stabilizes within very wide input voltage limits.
Its action Is absolutely automatic and noiseless, no moving parts being used.
Valve wear has no appreciable influence on the accuracy of stabilisation, The
wave form of the output voltage remains practically sine-shaped,
TECHNICAL DATA
Input voltage: 190 to 240 V
other voltage ranges available to special order,
Power frequency: , . .. 45 to 65 es.
Output voltage: continuously adjustable from 210 to 230 Or within other
limits according to order.
Wave form distortion: . Ii ' s ' 5% max.
Time required for adjustment to sudden changes of .mains voltage or load:
sec.
Accuracy of output voltage stabilisation:
a) Effect of inpult voltage varitions 0.2%.
b) Effect of changes In load 0.3%.
Valve complement (TESLA valves): 1 X RHT 1, 2 X AZ 1, 1 X 4654
INPUT
El oil cal
-1717V---3
Circuit diagram
Item
Model
Dimensions mm
width height depth
Weight Order
kg No,
Price
Electronic voltage
stabiliser (in cabinet)
Electronic 1' ?Iwo
stabiliser (without
cabinet)
KIM):
ST 250 VA
375 350 150 19
373
140 17
1 S 592 0? 5203
Printed in Clecholloyakia
.1
IdltiK ST 1 kVA and ST 2 kVA
ELECTRONIC A. C. VOLTAGE STABILISERS
APPLICATION
The A. C. mains voltage stabiliser supplies a constant voltage even at fluctua-
tions of mains voltage and variations of load. It Is designed for use in measure-
ments, in photography for feeding of light sources especially for colour film, for
maintaining constant speed of revolutions of motors, constant input for fur-
naces, etc,
DESCRIPTION
The basic part of the Kk12IK stabiliser is a choke, connected via an auto-trans-
former between mains and load, The reactance of the choke varies in accordance
with the magnitude of its D. C. saturation, The value of the saturation current
depends In its turn on the output voltage which controls the saturation current
electronically by means of a diode of special design,
The KA121K Si' 1 kVA and ST 2 kVA stabilisers are housed in solid metal cabinets
lacquered in black.
The two-piece front panel forms a single whole with the upper part, the
so-called control block. The so-called power block is mounted in the bottom
part.
The mains lead and the output leads are connected to the terminal strip acces-
sible after removal of the rear panel,
161
Declassified in Part - Sanitized Cop Approved for Release 2012/10/18 ? CIA-RDP82-00040R000300220017-5
Declassified in Part - Sanitized Copy Approved for Release 2012/10/18: CIA-RDP82-00040R000300220017-5
ADVANTAGES
The output voltage of the 10121K stab 1:sor Is Independent of load changes
from no?load to the nominal rating, Owing to the electronic circu't employed,
even large mains voltage surges and sudden increases of load are compen?
sated for practically instantaneously. Power frequency variations do not affe:t
the action of the stabiliser, The unit stab!lises w;thIn very wide input voltage
limits, Its action is absolutely automatic and noiseless, no moble parts taping
used, Valve wear has no appreciable Influence on the degree of stabilisation.
The wave form of the output voltage remains practically sine?shaped,
TECHNICAL DATA
Input voltage: 190 to 240 V; other voltage ranges available to special order.
Power frequency: 45 to 65 c s.
Output voltage: continuously adjustnble from 210 to 230 V or within other
limits according to order,
Wave form distortion: 5(') max,
Time required for adjustment to sudden changes of main; voltage or load:
secs.
Accuracy of output voltage stabilisation:
a) Effect of input voltage variations
b) Effect of changes in load
TESLA valves: 1 N.: RHI 1, 2 N: AZ 1, 1 4654.
INFUT
\
/\
?????=????????????
Circuit diagram
OUTPUT
Dimtnsions mm
Item Model Weight
kg
eridth height depth
Order
No.
Price
Electronic voltoge
stabiliser (in cabinet)
is ithout (abinet:
011ZIK
S11 kVA
$10
6$0
230
a) control block
485
180
170
b) pover block
485
36,0
180
Electronic voltage
KkItiK
stabiliser (in cabinet)
without cabinet:
512 kVA
510
6$0
280
a) control block
145
180
170
b) pot,er block
48$
360
270
47.$
7
$6
7
$3
%.......0....*?????MInemorrammommer????row?Nommery..s.orry.......otoa..rmarmA?aremorommgewormemmardorrwratalawameavaro.walII.8111
I S $514 ? 5202
Printed in Cvechoslovakia
411
KkliiK ST 5 kVA
? ELECTRONIC A.C.VOLTAGE STABILISER
?
'4741.?
APPLICATION
The A. C. mains voltage stabiliser supplies a constant voltage notwithstanding
fluctuations of mains voltage and variations of load. It is designed for use
in measurements, in photography (feeding of light sources, especially for colour
film), for maintaining constant speed of revolutions of motors, constant input
for furnaces, etc.
DESCRIPTION
The basic part of the KA121K stabiliser is a choke, connected via an auto-
transformer between mains end load. The reactance of the choke varies in
accordance with the magnitude of its D. C. saturation. The value of the satura-
tion current dc ends in its turn on the output voltage, which controls the
saturation current electronically by means of a diode of special design.
The KI/IK 5 kVA stabiliser is housed in a solid rack constructed of angle-irons.
The two-piece front panel forms a single whole with the upper part, the
so-called control block, which can be extracted from the apparatus and placed
separately.
The power block is, because of its great weight, built into the angle-iron frame
and can be set up apart, e. g. in the engine room. The two parts are inter-
connected by means of four leads; if the control block is mounted together
with the apparatus to be supplied from the stabiliser, again only four leads
are needed for connection. The mains lead and output leads are connected to the
Declassified in Part - Sanitized Copy Approved for Release 2012/10/18: CIA-RDP82-00040R000300220017-5
Declassified in Part - Sanitized Copy Approved for Release 2012/10/18: CIA-RDP82-00040R000300220017-5
terminal strip in the power block, which becomes accessible after removal
of the rear panel,
ADVANTAGES
The output voltage of the 1012IK stabiliser Is independent of load changes from
no-load to the nominal rating, Owing to the electronic circuit employed, even
large mains voltage surges and sudden increases of load are compensated for
practically Instantaneously. Power frequency variations do not affect the action
of the stabiliser. The unit stabilises within very wide Input voltage limits, Its
action is absolutely automatic and noiseless, no moving parts being used, Valve
wear has no appreciable Influence on the degree of stabilisation, The wave
form of the output voltage remains practically sine-shaped,
TECHNICAL DATA
Input voltage: 190 to 240 V; other voltage ranges available to special order,
Power frequency: 45 to 65 cis.
Output voltage: continuously adjustable from 210 to 230 V, or within other
limits according to order.
Wave form distortion: 5% max,
Accuracy of output voltage stabilisation:
a) Effect of Input voltage variations 0,2%,
b) Effect of changes in load 0.3%.
TESLA valves: 1 X RHI 1, 2 X EL 6.
K(IIK RT VARIABLE
AUTO-TRANSFORMERS
INPUT
OUTPUT
Circuit Diagram
Item
Model
Dimensions mm
Weight
kg
Order
No.
Price
width I
height
depth
Electronic voltage
KIIi21K
stabiliser (In cabinet)
ST 5 kVA
510
750
500
130
Electronic voltage
stabiliser:
a) control block
485
315
270
18
b) power block
with cabinet
510
750
500
112
1 S 597 a - 5202
Printed in Czechoslovakia
APPLICATION
Continuous voltage control within wide range. Suitable for motor speed control,
heat control for electric furnaces, ovens, etc., illumination control in theatres, cinemas,
etc., testing and calibration of measuring instruments in research and laboratory
work and wherever A.C. voltage should be adiusted smoothly and continuously.
DESCRIPTION
The an variable auto-transformer is wound in a single layer on a toroidal
iron core. Apart from the winding terminals two taps are brought out: one fixed
and the other connected to a brush contact. As the control knob is rotated a carbon
brush travels along the winding, tapping off a part of the voltage. The resistance
of the carbon brush is so chosen that no excessive heat is generated in the short-
circuited turn. The transformer is housed in a metal case provided with holes
ensuring effective air cooling. All terminals are connected to a terminal block.
Ganged transformer assemblies of two or three units, for use on three-phase systems,
are supplied on request.
411 ADVANTAGES
KRIVK auto-transformers have smaller dimensions than the ordinary types of
variable transformers of the same rating, The provide direct continuous voltage
Declassified in Part - Sanitized Copy Approved for Release 2012/10/18: CIA-RDP82-00040R000300220017-5
Declassified in Part - Sanitized Copy Approved for Release 2012/10/18: CIA-RDP82-00040R000300220017-5
control without the use of complicated mechanical gears, The terminals on the panel
are clearly marked, The diagram of the winding facilitates correct connections for
all purposes, The terminals are of the universal type permitting the use of plugs and
cable ends or ordinary banana plugs,
Output voltage is variable from zero to above mains voltage,
TECHNICAL DATA
Item
Model
Max,
current
A
Input
voltage
V
Output
voltage
y
Dimensions mm
Wo10ht
kg
Order
No,
Price
? ---,?
die, I
height
Variable
auto.transformer
Variable
auto?transformer
Variable
auto?transformor
Variable
auto?transformer
Two.gang variable
auto?transformor
Two?gang variable
auto.transformor
Three. phase
variable
aulo?transformor
Three. phase
variable
auto?transformer
KR12.1K
RT 1/250
KRIM
RT 21380
KRIM
m? 10/250
KRIVK
RT 10/380
KRIM
RT 20/250
KRIM
RT 20/380
KRIZIK
RT 2/3X380
KRIZIK
RT 10/3X380
1
2.5
10
10
20
20
3X 15
, 3x10
120,220
120,220
380
120,220
120,220
380
120,220
1%2020
120,220
380
120,220
380
0-250
0-250
0-250
0-380
0-380
0-380
0-380
0-380
160
240
290
290
20
290
240
290
140
210
245
260
400
420
470
780
4,5
12,5
23.5
The voltages as quoted above are valid at a frequency of 50 c/s,
KR121K variable auto?transformers can be operated at any voltages lower than those rated,
KRIM RT VARIABLE VOLTAGE TRANSFORMERS
Schematic diagrams and dimensional sketches
11=11...11V
0-380V
120-130
0 -250V
220V
120V
0 -380V
380V
220V
RT 10 250 Vs t=1: 245; RT 10 380 VI a 295
1 S 582 a/1 ? 5103
Declassified in Part - Sanitized Copy Approved for Release 2012/10/18: CIA-RDP82-00040R000300220017-5
Declassified in Part - Sanitized Copy Approved for Release 2012/10/18: CIA-RDP82-00040R000300220017-5
Schematic diacrams and dimensional sketches
0 380V 0,380V
420..
RT 20
RT 20/250: 0 = 4001 RT 20/3801 ci= 520
o 0 000 000 000
3x 3x 3x 3x
0 220V 380V 0-380V
RT 2/31 a= 470
b230
1 S 582 0;2 ? 5103
RT 2/3 RI 10/3
0 220V 0-250V
f=,
f
0
4.?????1
100
RT 10/32 a I t 780
b = 280
Ptintedin Ctethottorni
Declassified in Part - Sanitized Copy Approved for Release 2012/10/18: CIA-RDP82-00040R000300220017-5