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| Automatic Voltage Stabilizers
| Magnetic Voltage Stabilizers
Voltage StabilizerSTechnical informaTion
Your first source for Transformers and resistors
ruhstrat gmbH · leinetal / auf der Mauer 1 · 37120 bovenden · phone: +49 (0) 55 1 820 830 - 0 · fax: +49 (0) 55 1 820 830 - 50 · e-mail: [email protected] · www.ruhstrat.com
Quality and Experience are the guiding principles
ruhstrat has decades of experience in developing and manu-facturing electrical winding products. We offer more than innovative technology. being a reliable partner we assist our customers by developing optimal solutions customized to their needs.
While carrying out the development, the design, the deliv-ery and the creation of solutions is an important part of our business, another important part is the performance of a service comprising all expected tasks, from the maintenance to the support.
ruhstrat has been specialized in developing and designing customized transformers, reactors, power supplies and power resistors. our main scope of functions is the designing of special transformers up to 2,000 kVa and power resistors up to 5,000 kW. We manufacture custom-made transformers, reactors, power supplies and power resistors. ruhstrat components are used wherever products made to specification and small and minimum batch sizes are needed, so for uses which cannot be provided with bulk goods.
TEchnicAl inforMATion VolTAgE STAbilizErS
2
| Variable Transformers from 20 VA to 2 MVA variable toroidal transformers variable column transformers variable transformer aggregates
| Voltage Stabilizers from 60 VA to 2 MVA magnetic voltage stabilizers automatic voltage stabilizers
| Power Transformers from 50 VA to 8 MVA dry-type power transformers cast resin transformers aC/DC reactors
| Toroidal Core Transformers up to 400 kVA
| High-Current Transformers up to 30 kA
| Power Resistors load resistors test resistors tube resistors laboratory resistors
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low VolTAgE –
| Magnetic Voltage Stabilizers acc. to eN 61558, VDe 0570
single-phase design
power range up to 10 kVa
adjustment time from 40…60 ms
types of protection: iP 00…iP54, iP65
| Automatic Voltage Stabilizers acc. to eN 61558, VDe 0552
single-phase and three-phase design
power range up to 2.000 kVa
voltage range up to 20.000 V
adjustment time from 1,5…2,5 sec.
degrees of protection: iP00…iP54
certified acc. to Kta 1401 for use in nuclear power plants
optionally in earthquake proof design
each phase can be controlled separately if required
high QuAliTy
teCHNiCal iNforMatioNautoMatiC Voltage StabilizerS aCCorDiNg to DiN eN 61558, ieC 439
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1. ApplicationVoltage stabilizers are used as series connection unit with mains with deviating voltage. at the output of the device a constant voltage is available for the consumer load. this con-stant voltage ensures a constant performance of the machine, independent from mains deviations.
the main fields of application are machine controls, eDP plants, test fields and laboratories, medical electronics, surveillance systems, telecommunication systems, process controls, precise regulations, air traffic control, heatings by stove.
Stabilization is made without any phase shift. the voltage stability is independent from the load. the output voltage is sinusoidal according to the input voltage. No wave deformation neither to the line nor to the load. radio interference suppression and surge suppression are
available upon request.
the outstanding advantage of a voltage stabilizer with vari-able transformer consists in the proportional change of the sine-wave, thus maintaining the stabilization accuracy of all voltage forms proportionally constant, i.e. rms. voltage, aver-age voltage, and peak voltage. thermal devices respond to the rms. value.
Heavily loaded capacitive input DC power supplies respond to the average value. lightly loaded capacitive input DC power supplies respond to the peak value. these parameters, however, have to be ensured for sine-wave shaped aC voltages only, which can best be realized in a simple way by using a variable transformer.
2. Constructionthe voltage stabilizer consists of a variable transformer with servo motor, an additional series transformer as back and boost transformer and an electronic regulator, which can be installed in a common enclosure up to a certain size.
3. Principle of operationin case of deviation of the rated voltage from the desired value, the electronic controller produces, via the servo motor, a volt-age adjustment of the variable transformer which, via the back and boost transformer regulates the voltage corresponding to the deviation. together with the boosting voltage the input voltage results in the output voltage.
three-phase voltage stabilizers are available with common control for all three phases (type NrD) and also with individual control for each of the three phases (type NrDa). the com-mon control type suffices for reasonably balanced threephase loads. in case of a balanced load, the voltage deviation will be registered by one phase only and then adjusted commonly for all three phases.
the individual control becomes necessary in cases of specific high requirements of individual phase voltage stability, when the incoming mains voltage has to be adjusted individually per phase. for this unbalanced load, the voltage deviation will be registered and then corrected individually for each phase.
the neutral conductor N1 must be connected. a neutral reac-tor is absolutely necessary, if no neutral conductor exists at the mains side.
(type Nr, NrD, NrDa)this type of controller shows a sustained deviation. When the actual voltage is equal to the desired voltage, the relays are in zero position. in case of a deviation from the desired voltage of more than approx. ± 1 %, the controller responds accord-
ing to the direction of this deviation effecting ”lower” or ”raise” voltage correction.
the rated output voltage is being kept con-stant with an accuracy of ± 1%, considering a correction time of 1.5 – 2.5 s (max. deviation up to rated value).
fig. 1 voltage stabilizer in principle
teCHNiCal iNforMatioNautoMatiC Voltage StabilizerS aCCorDiNg to DiN eN 61558, ieC 439
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4. Protection against short-circuit and overloadin order to protect the voltage stabilizer against damages in case of short-circuits at the output side, it is imperative to pro-vide overload and short-circuit protection devices according to the rated output current. in order to protect the power supply leads, short-circuit protection devices with slow characteristic of circuit control have to be used at the input side. the highest primary current flows at lowest input voltage.
an overload relay with release contacts (N/C or N/o contact) led on terminals is inserted into the control circuit. the cus-tomer has to connect these contacts to a switch which sepa-rates the transformer-type voltage stabilizer at the input side from the mains in case of faults or which is to utilized for visual/audible fault indication.
5. Ambient conditionsfor installation in rooms with indoor climate the transformer-type voltage stabilizers are climate-proof according to DiN iSo 50 010.
Limit values: ambient temperature at rated power +40 °C
for higher ambient temperatures see figure 3 minimum value -20 °C relative humidity at 40 °C 85 % mean annual value up to 65 % Dewing not permissible
Temperature:curve a = ambient temperaturecurve b = operating temperature
fig. 3reduction curve for ambient tempera-ture and altitude of installation
fig. 2limit values for overloads during short-time operationa – cold condition /b – warm condition
teCHNiCal iNforMatioNautoMatiC Voltage StabilizerS aCCorDiNg to DiN eN 61558, ieC 439
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6. Ruhstrat automatic voltage stabilizers in standard design
are galvanically coupled with the electric supply line, have galvanically refined contact devices, can be overloaded temporarily (see page 5, fig. 2), are, including the desired accessories, mounted into a
steelsheet enclosure, type of protection iP 21, efficiency is between 95 % and 98 %, various ranges of regulation and deviation, rated powers and rated currents apply to continuous operation, the rated current i2 can be collected over the total regulating
range, are built with air cooling (aN) or, on request, also with oil
cooling (oNaN), can be used at a height of installation up to 1,000 m above
MSl at rated power (see page 5, fig. 3).
7. Accessories output voltage monitoring, release contacts led on terminals measuring of voltage in the input or/and in the output,
threephase with turn-over measuring of current in the input or/and in the output by-pass soft start special radio interference suppression circuit breaker
This list only contains the standard Ruhstrat voltage stabi-lizer programme.
Other power ratings voltages line fluctuations types of protection according to eN60529 steel-sheet enclo-
sure: iP21 ambient conditions earthquake-proof version or other requirements according to customer`s specifications
upon request.
fig. 4 three-phase voltage stabilizer, common control type: NrD vector group: iii Nao
fig. 5 three-phase voltage stabilizer , individual phase control type: NrDa vector group: iii Nao
teCHNiCal iNforMatioN
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SiNgle-PHaSe Voltage StabilizerS 230 V 1/N/Pe, 50/60 Hz
Type
rated voltage 230 V
rated input current
[A]
rated output current
[A]
cu-weight[kg]
Enclosure iP21
Dimensions weight
Power [kVA] width depth height approx kg
symmetrical i1 max. i2 max.
input ±10 %, output ±1 %, 207…253 V
Nr10-230/2,3 2,3 11,3 10,1 1,2 500 300 500 40
Nr10-230/4,3 4,3 21 18,8 1,8 500 300 500 50
Nr10-230/7,0 7,0 33,9 30,3 3,1 500 300 500 60
Nr10-230/9,3 9,3 45,3 40,4 4,4 500 300 500 70
Nr10-230/13,3 13,3 64,7 57,7 5,1 500 300 500 80
Nr10-230/17,0 17,0 82,4 73,6 10,5 600 400 1000 100
Nr10-230/21,7 21,7 105,1 93,8 12,5 600 400 1000 110
Nr10-230/28,3 28,3 137,4 122,7 15,5 600 400 1000 120
Nr10-230/33,3 33,3 161,7 144,3 18,0 600 400 1000 130
Nr10-230/43,3 43,3 210,1 187,6 23,0 800 400 1000 140
Nr10-230/56,7 56,7 274,8 245,4 9,0 800 400 1000 150
input ±15 %, output ±1 %, 195,5…264,5 V
Nr15-230/1,4 1,4 7,4 6,2 1,2 500 300 500 40
Nr15-230/2,7 2,7 13,8 11,5 1,8 500 300 500 50
Nr15-230/4,3 4,3 22,4 18,8 3,1 500 300 500 60
Nr15-230/5,8 5,8 30,1 25,8 4,4 500 300 500 70
Nr15-230/8,3 8,3 43 36,1 5,1 500 300 500 80
Nr15-230/10,5 10,5 54,2 45,5 10,5 600 400 1000 100
Nr15-230/13,7 13,7 70,5 59,2 12,5 600 400 1000 110
Nr15-230/17,7 17,7 91,1 76,5 15,5 600 400 1000 120
Nr15-230/20,8 20,8 107,5 90,2 18,0 600 400 1000 130
Nr15-230/27,0 27,0 139,3 116,9 23,0 800 400 1000 140
Nr15-230/35,3 35,3 182,3 153 9,0 800 400 1000 150
input ±20 %, output ±1 %, 184…276 V
Nr20-230/1,0 1,0 5,5 4,3 1,2 500 300 500 40
Nr20-230/1,8 1,8 10,1 7,9 1,8 500 300 500 50
Nr20-230/3,1 3,1 17,1 13,4 3,1 500 300 500 60
Nr20-230/4,2 4,2 23 18 4,4 500 300 500 70
Nr20-230/5,8 5,8 32,1 25,3 5,1 500 300 500 80
Nr20-230/7,5 7,5 43,1 32,5 10,5 600 400 1000 100
Nr20-230/9,5 9,5 52,3 41,1 12,5 600 400 1000 110
Nr20-230/12,3 12,3 68 53,4 15,5 600 400 1000 120
Nr20-230/15,0 15,0 82,7 65 18,0 600 400 1000 130
Nr20-230/19,1 19,1 105,2 82,7 23,0 800 400 1000 140
Nr20-230/24,8 24,8 136,8 107,5 9,0 800 400 1000 150
tab. 1 measurement table Dimensions and weights are approximate values. Subject to change.
teCHNiCal iNforMatioN
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tHree-PHaSe Voltage Stabilizer for SyMMetriCal aND uNbalaNCeD loaD
Type
rated voltage 400 V
rated input current
[A]
rated output current
[A]
cu-weight[kg]
Enclosure iP21
Dimensions weight
Power [kVA] width depth height approx kg
symmetrical unbalanced i1 max. i2 max.
input ±10 %, output ±1 %, 360…440 V
NrD10-400/7 NrDa10-400/7 7 11,3 10,1 3,5 600 400 1300 100
NrD10-400/13 NrDa10-400/13 13 21 18,8 5,5 600 400 1300 130
NrD10-400/21 NrDa10-400/21 21 33,9 30,3 10 600 400 1300 150
NrD10-400/28 NrDa10-400/28 28 45,3 40,4 13,5 600 400 1300 170
NrD10-400/40 NrDa10-400/40 40 64,7 57,7 15,5 800 500 1600 220
NrD10-400/51 NrDa10-400/51 51 82,4 73,6 31,5 800 500 1600 250
NrD10-400/65 NrDa10-400/65 65 105,1 93,8 37,5 800 500 1600 280
NrD10-400/85 NrDa10-400/85 85 137,4 122,7 46,5 800 500 1600 300
NrD10-400/100 NrDa10-400/100 100 161,7 144,3 54 1200 600 2000 340
NrD10-400/130 NrDa10-400/130 130 210,1 187,6 69 1200 600 2000 390
NrD10-400/170 NrDa10-400/170 170 274,8 245,4 27 1200 600 2000 420
NrD10-400/177 NrDa10-400/177 177 286,1 286,1 36 1200 600 2000 500
NrD10-400/235 NrDa10-400/235 235 379,9 379,9 52 1200 600 2000 550
NrD10-400/295 NrDa10-400/295 295 476,9 476,9 67 1200 600 2000 600
NrD10-400/354 NrDa10-400/354 354 572,2 572,2 83 1200 600 2000 650
NrD10-400/471 NrDa10-400/471 471 761,4 761,4 104 1600 800 2000 900
NrD10-400/590 NrDa10-400/590 590 953,7 953,7 133 1600 800 2000 1000
NrD10-400/707 NrDa10-400/707 707 1142,9 1142,9 167 1600 800 2000 1100
input ±15%, output ±1 %, 340…460 V
NrD15-400/4,3 NrDa15-400/4,3 4,3 7,4 6,2 3,5 600 400 1300 100
NrD15-400/8 NrDa15-400/8 8 13,8 11,5 5,5 600 400 1300 130
NrD15-400/13 NrDa15-400/13 13 22,4 18,8 10 600 400 1300 150
NrD15-400/17,5 NrDa15-400/17,5 17,5 30,1 25,8 13,5 600 400 1300 170
NrD15-400/25 NrDa15-400/25 25 43 36,1 15,5 800 500 1600 220
NrD15-400/31,5 NrDa15-400/31,5 31,5 54,2 45,5 31,5 800 500 1600 250
NrD15-400/41 NrDa15-400/41 41 70,5 59,2 37,5 800 500 1600 280
NrD15-400/53 NrDa15-400/53 53 91,1 76,5 46,5 800 500 1600 300
NrD15-400/62,5 NrDa15-400/62,5 62,5 107,5 90,2 54 1200 600 2000 340
NrD15-400/81 NrDa15-400/81 81 139,3 116,9 69 1200 600 2000 390
NrD15-400/106 NrDa15-400/106 106 182,3 153 27 1200 600 2000 420
NrD15-400/110 NrDa15-400/110 110 189,2 189,2 36 1200 600 2000 500
NrD15-400/148 NrDa15-400/148 148 254,5 254,5 52 1200 600 2000 550
NrD15-400/185 NrDa15-400/185 185 318,1 318,1 67 1200 600 2000 600
NrD15-400/222 NrDa15-400/222 222 381,8 381,8 83 1200 600 2000 650
NrD15-400/295 NrDa15-400/295 295 507,3 507,3 104 1600 800 2000 900
NrD15-400/362 NrDa15-400/362 362 622,5 622,5 133 1600 800 2000 1000
NrD15-400/443 NrDa15-400/443 443 761,8 761,8 167 1600 800 2000 1100
Continued on Page 9
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teCHNiSCHe iNforMatioNeNtHree-PHaSe Voltage Stabilizer for SyMMetriCal aND uNbalaNCeD loaD
tab. 2 measurement table Dimensions and weights are approximate values. Subject to change.
Type NRD/NRDAwith three-term controller (step controller), accuracy: ± 1 % correction time between max. deviation and rated value: 1.5…2.5 s
NrD common control of the three phases according to the measuring value of one phase. the neutral conductor 1N has to be connected. NrDa individual control for each of the three phases. the neu-tral conductor 1N has to be connected.
Type
rated voltage 400 V
rated input current
[A]
rated output current
[A]
cu-weight[kg]
Enclosure iP21
Dimensions weight
leistung [kVA] width depth height approx kg
symmetrical unbalanced i1 max. i2 max.
input ±20 %, output ±1 %, 320…480 V
NrD20-400/3 NrDa20-400/3 3 5,5 4,3 3,5 600 400 1300 100
NrD20-400/5,5 NrDa20-400/5,5 5,5 10,1 7,9 5,5 600 400 1300 130
NrD20-400/9,3 NrDa20-400/9,3 9,3 17,1 13,4 10 600 400 1300 150
NrD20-400/12,5 NrDa20-400/12,5 12,5 23 18 13,5 600 400 1300 170
NrD20-400/17,5 NrDa20-400/17,5 17,5 32,1 25,3 15,5 800 500 1600 220
NrD20-400/22,4 NrDa20-400/22,4 22,4 43,1 32,5 31,5 800 500 1600 250
NrD20-400/28,5 NrDa20-400/28,5 28,5 52,3 41,1 37,5 800 500 1600 280
NrD20-400/37 NrDa20-400/37 37 68 53,4 46,5 800 500 1600 300
NrD20-400/45 NrDa20-400/45 45 82,7 65 54 1200 600 2000 340
NrD20-400/57,3 NrDa20-400/57,3 57,3 105,2 82,7 69 1200 600 2000 390
NrD20-400/74,5 NrDa20-400/74,5 74,5 136,8 107,5 27 1200 600 2000 420
NrD20-400/78 NrDa20-400/78 78 143,3 143,3 36 1200 600 2000 500
NrD20-400/104 NrDa20-400/104 104 191 191 52 1200 600 2000 550
NrD20-400/130 NrDa20-400/130 130 281 281 67 1200 600 2000 600
NrD20-400/155 NrDa20-400/155 155 284,7 284,7 83 1200 600 2000 650
NrD20-400/208 NrDa20-400/208 208 382,1 382,1 104 1600 800 2000 900
NrD20-400/260 NrDa20-400/260 260 477,6 477,6 133 1600 800 2000 1000
NrD20-400/312 NrDa20-400/312 312 573,1 573,1 167 1600 800 2000 1100
Other outputs and voltage deviations on request.
teCHNiCal iNforMatioNMagNetiC aC Voltage StabilizerS
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1. ApplicationMagnetic aC voltage stabilizers are necessary for loads which are supplied with aC voltage and which react critically on volt-age variations, such as electronic instruments and units, meas-uring and regulating devices etc..
especially semi-conductor circuits are sensible against voltage peaks. Voltage peaks result from switching e. g. triacs and thy-ristors on and off, they lead to malfunctioning resp. destruc-tion of electronic circuits.
The magnetic stabilizer has the following functions: regulating mains voltage fluctuations, stabilizing the output voltage at variable load, physically separating the output voltage from the input, transforming the input voltage into the required output
voltage, limitting the output current in case of overload or short cir-
cuit and thus also the input current, in order to protect the other components, filtering high-frequency interferences and suppressing peak
voltages, filtering distorted input voltage to sinusoidal output voltage.
2. Constructionthe magnetic aC voltage stabilizer consists of a choke-trans-former combination and a capacitor. the magnetic aC voltage stabilizers are designed with choke-transformer combination and harmonic compensation winding which form a geometri-cal unit on special sheet-steel lamination.
3. Special RemarksMagnetic stabilizers are designed and adjusted for a resistive load. if, however, the load power factor is below 0.9, the out-put voltage will be reduced at inductive load and raised at capacitive load.
inductive load can be balanced by compensation capacitors. Due to these additional capacitors, it is necessary to avoid any undue capacitive load upon switching off the load. therefore, it is advisable to switch always both, load and compensation capacitors, together.
adaptation of the magnetic stabilizer to the p.f. of the load can be made in special design.
4. Technical Datapower range: 60 Va up to 10 kVaHigher power ratings can be obtained by connecting identical magnetic voltage stabilizers in parallel. (≤ 90 % of the total nominal power value).in case of parallel connection ensure that the output windingsare connected in phase.
input voltage: 230 V, +10 % / -20 %output voltage: 230 V, sinusoidalthe magnetic voltage stabilizers are designed for resistive loads, lPf 1.0. When placing an order it is absolutely neces-sary to indicate loads with different power factor, unless a larger deviation of the output voltage acc. to page 14, fig. 13 is permissible.
Accuracy of the output voltage in case of input voltage fluctuations:
input voltage fluctuations:output voltage:
60…750 VA 1…10 kVA
± 10 %at constant load: ± 1,0 % ± 0,5 %
between 0 and 100 % load: ± 2,0 % ± 1,0 %
-10 % bis -20 % between 0 and 100 % load: ± 2,5 % ± 2,0 %
frequency: 50 Hz, ± 0,5 %frequency deviations lead to voltage deviations (e.g. ± 1 % frequency deviation = approx. 1.5 % output voltage deviation).
other voltages or frequencies upon request.
efficiency: approx. 80…85 % at nominal values and resistive load
adjustment time: approx. 40…60 msoutput harmonicdistortion: 60 …750 Va = 5 % 1 … 5 kVa = 3 % 6 … 10 kVa = 5 %
peak voltageattenuation: 35 db up to 100 kHzaltitude of installation: up to 1000 m above MSl power derate per 100 m above 100 m = 1,5 %
ambient temperature: up to max. 40 °C for continuous operation. even at partial load or idling the stabilizers reach the ad-missible operation temperature.
teCHNiCal iNforMatioNMagNetiC aC Voltage StabilizerS
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type of cooling: aNtypes of protection according to EN 60529: 60…750 Va = iP65 resin scaled 1…10 kVa = iP20 steel-sheet enclosure
insulation class: b (60 Va…2,5 kVa) f (3 kVa…10 kVa)inrush current: up to 30 × iN
fuse protection:fuse protection against overload and short-circuit has to be made at the output. input fuse is not possible, since in case of shortcircuit the primary current may drop down to the rated current.
Our magnetic voltage stabilizers are short-circuit proof. Primary and secondary windings are separated by a mag-netic shunt.
l* opening for cable ø [mm]
Pg11 6–12
Pg16 10–14
Pg21 13–18
Pg29 18–25
*l = cable inlet bushing
fig. 9 magnetic voltage stabilizer type: JK 10–15
tab. 3 measurement table
fig. 6 magnetic voltage stabilizertype: JK 1–2
fig. 7 magnetic voltage stabilizertype: JK 3–5
fig. 8 magnetic voltage stabilizertype: JK 6–9
teCHNiCal iNforMatioNMagNetiC aC Voltage StabilizerS
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fig. 10 basic circuit diagram
fig. 11 secondary current
teCHNiCal iNforMatioNMagNetiC aC Voltage StabilizerS
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Type order-No.Power
VA
Dimensions cu- weight
kg
weight kgb h T b1 T1 f g
JK 1 3179 8501 99 60 160 160 190 136 142 22 6 1,2 6,5
JK 2 3179 8502 99 120 160 160 190 136 142 22 6 2,0 9
JK 3 3179 8503 99 250 178 175 275 160 167 35 9x13 4,6 16
JK 4 3179 8504 99 500 202 180 330 178 205 65 9x13 6,2 23
JK 5 3179 8505 99 750 202 180 330 178 205 65 9x13 8,1 27
JK 6 3179 8506 99 1000 326 263 305 310 82 – 9x14 9,8 32
JK 7 3179 8507 99 1500 326 263 320 310 94 – 9x14 14,0 40
JK 8 3179 8508 99 2000 326 263 350 310 124 – 9x14 18,0 51
JK 9 3179 8509 99 2500 326 263 395 310 166 – 9x14 19,5 67
JK 10 3179 8510 99 3000 555 600 380 493 255 – 10,5 25,0 93,5
JK 11 3179 8511 99 4000 555 600 380 493 255 – 10,5 29,0 100
JK 12 3179 8512 99 5000 555 740 380 493 255 – 10,5 32,0 110
JK 13 3179 8513 99 6000 555 790 420 493 295 – 10,5 45,0 125
JK 14 3179 8514 99 7500 555 790 420 493 295 – 10,5 58,0 150
JK 15 3179 8515 99 10000 555 790 480 493 360 – 10,5 71,0 200
tab. 4 measurement table Dimensions and weights are approximate values. Subject to change.
teCHNiCal iNforMatioNMagNetiC aC Voltage StabilizerS
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fig. 12 by reducing the requested regulating accuracy and the output load the input voltage can be dropped down to 50 % of the rated value
fig. 13 deviation of the output voltage dependent on the load p. f. at rated load
15
requeSt forMPlease fax to +49 (0) 551 820 830-9600 or e-mail to [email protected]
1. Electrical dataInput- rated voltage _________________________________________________________________________________ V- phases _____________________ phases, neutral conductor earthing conductor- adjustment range ± 10 % ± 15% ± 20 % ± ____________ % + ___________________ % / - ________________ % of the rated voltage or from _____________________________________ to ____________________________________ Vrated frequency 50 Hz 60 Hz ___________________ Hz
Output- rated voltage _________________________________________________________________________________ V- phases _____________________ phases, neutral conductor earthing conductor - regulating accuracy Standard ± 1 % of rated voltage or ± ________________ % of rated voltage - rated current _________________________________________________________________________________ a- rated power _______________________________________________________________________________ kVa- efficiency factor __________________________________________________________________________________- load symmetrical unbalanced
2. Adjustment- transformers Neutral-earthing-transfomer No neutral conductor present transformer with galvanic separation transformer with autowinding interference suppression transformer
3. Ambient- ambient temperature from ________________ to __________________ °C- relative humidity min. _________________ max. ________________ %- altitude __________________________________________ m MSl- climate area __________________________________________________________________________________- dewing allowed yes no - pollution yes no - other ________________________________________________________________________________
4. Protection- shock hazard safety class 1 other _____________- type of protection iP00 iP 21 or _________________ iP ________________- installation site indoor outdoor - enclosure steel sheet stainless steel other __________________________________ stationary non-stationary portable rollable natural air cooling forced air cooling color ral 7035 color ral _____ other __________________________________
5. Features main switch control light output fuse fault current protection thermal-magnetic overload protection analogue measuring instruments digital ammeter voltmeter voltage monitoring range from ________________________________ to ____________________________________ V bypass circuit other ______________________________________________________
6. Your details Company name _____________________________________________________________________
Contact name ______________________________________________________________________
Phone ____________________________________________________________________________
e-mail ____________________________________________________________________________
Place, Date, Signature* ________________________________________________________________*i agree that the ruhstrat gmbH, as well as if applicable the eiSeNMaNN ag, or any other associated company or sales agency records, processes and uses my data for the transmission of my re-quested information. the ruhstrat gmbH will only forward my data to the above mentioned institutions, if they are responsible for the requested information. incidentally my data will be treated confidentially and will not be given to any third party. i can withdraw my consent for the future at any time.
industrial furnaces
Electrical TestsVoltage Stabilisation TransformersAc/Dc reactorsSinus filtersPower resistors
ruhstrat gmbh leinetal / auf der Mauer 1 gewerbegebiet area 3 / Süd 37120 bovenden germanyphone: +49 (0) 55 1 820 830 - 0 fax: +49 (0) 55 1 820 830 - 50e-mail: [email protected] web: www.ruhstrat.com
Division: transformers phone: +49 (0) 55 1 820 830 - 624 fax: +49 (0) 55 1 820 830 - 9624 e-mail: [email protected]
technical details subject to change. all information provided is subject to change without notice.as of 09/2013
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