ring core transformers -...

RING CORE TRANSFORMERS

VARIABLE TOROIDAL TRANSFORMERS

Copyright © 2002-2005 SBA

Incorporated transformers

Single-phase transformers up to 630 kVA

Three-phase transformers up to 1000 kVA

Control transformers

Safety isolating transformers

Isolating transformers for installation in hospitals

Insulating transformers up to 10000 V

High current transformers up to 2000 A

Autotransformers - starting transformers

Variable voltage transformers for ventilation systems

Transformers for vehicles

Print and flat transformers

Transformers for switched-mode power supplies

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Voltage stabilizers

Incorporated versions up to 3000 VA

Portable versions up to 1000 VA

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DC power supplies

Single-phase types - unsmoothed, up to 250 V/1000 A

Einphasentypen – C/LC-Glättung, bis 250 V/1000 A

Three-phase versions up to 250 V and 1000 A

Smoothed DC power supplies

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Ballasts for lighting equipment

Standard ballasts for gas discharge lamps from 250 W to 3500 W

series transformers for halogen L V lampsfrom 20 W to 500 W

Ballasts (high-reactance transformers)for all kinds of gas discharge lamps up to 100 kW

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Resin-encapsulated transformers

Safety isolating transformers, stationary/transportable

Isolating transformers, stationary/transportable

Roof inlet transformers

Thawing transformers

Antifreeze transformers

Print and flat transformers

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Reactors and inductors

AC reactors up to 320 kVAr, single-phase

AC reactors up to 500 kVAr, three-phase

DC reactors up to LI2 = 1500 Ws

Filter reactors - AF rejector circuits

Transductors - reactors for switched-mode power supplies

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ContentIntroduction in the product range 2 – 7

RKT single-phase ring core transformers8 – 9

RST single-phase variable toroidal transformers10 – 11

DRT three-phase variable toroidal transformers11 – 12

General technical information 14 – 15

General Terms of Business 15 – 16


The people behind SBA are the

basis of our success. Custom

design of solutions requires a

high degree of flexibility and

customer focus. The best solution

to a customer's problem is

always developed in a team

effort. The result is the optimal

design for every product.

Computer-backed processes,

attractive prices and high-level

logistics are ideal complements

of the advanced know-how of

our employees. Independent,

responsible action is as impor-

tant as creative thinking to meet

our customers' requirement profi-

les.

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We warrant the safe and proper functi-

on of our transformers and inductive

components for a period up to five

years.

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Voltagemade tomeasure


SBA - an investment in the future

Permanent innovation and most

advanced materials guarantee

and constantly redefine the high

quality of SBA transformers and

power supplies. The heat resistant

materials from SBA meet highest

demands on safety, life and quali-

ty - VDE and TÜV approved.

Extensive controls in all areas of

production warrant the reliability

of all SBA products.

Every day, new proof of SBA's

performance potential is provided:

Products of special design in small

or medium lots permit individual

solutions for diverse applications in

industry - often within a few wor-

king days. SBA - with strong tech-

nology and mature products in the

new millennium.

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DC power supplies

– non-stabilized up to 1000 A

– stabilized up to 40 A

– UPS modules for DC power supplies

Voltage stabilizers

– magnetic up to 3 kVA

– motor-controlled up to 1000 kVA

Resin-encapsulated transformers

– Safety isolating transformers

(including portable versions)

– Isolating transformers

(including portable versions)

– Print and flat transformers

Industriesfor many

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Ballasts for lighting equipment

– Transformers for halogen LV lampsfrom 20W to 500 W

– Special ballasts for all kinds of gasdischarge lamp up to 100 kW

– High-reactance transformers

– Controlled ballasts (transductors)

– Electronic ballasts up to 30 kW

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Incorporated transformers

– Single-phase transformersup to 630 kVA

– Three-phase transformersup to 1000 kVA

– Isolating transformers for installation inhospitals

– Insulating transformers up to 10 000 V

– High current transformers up to 2000 A

– Auto transformers

– Transformers for rail vehicles

Ring core and variable toroidaltransformers

– Ring core transformers up to 1000 VA

– Variable toroidal transformers, single-phase or three-phase,up to 63 A

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Reactors and inductors

– AC reactors up to500 kVAr

– DC reactors

– Line reactors and commutating reactors

– Filter reactors - AF rejector circuits

– Switched-mode power supply components

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14

Type RKTSingle-phase ring core transformers as

Single-phase power transformers VDE 0570-2-1 / EN 61558-2-1Single-phase isolating transformers VDE 0570-2-4 / EN 61558-2-4Single-phase safety isolating transformers VDE 0570-2-6 / EN 61558-2-6Single-phase autotransformers VDE 0570-2-13/ EN 61558-2-13

8


Version with installation kit

Application

Transformers supplying electrical consumers in control and regulating environments where space is a consideration.Low weight, minimum no-load loss, no humming, no interference fields and the excellent adaptationto a defined volumeare some of the special features of these transformers.Reliable system separation is optained by the use as isolating or saftey isolating transformer.Dimensioning as autotransformer brings substantial savings in comparison with transformers with separate windings.

SpecificationsOutput range 110 VA - 1000 VA

(higher output on request)Input voltage max. 690 VOutput voltage max. 690 VOutput current max. 65 AFrequency 50-60 HzVector group depends on the required design versionProtection class IIProtection index IP 00Insulation class BAmbient temperature max. 40°C

Construction

� Open construction IP 00, incorporation up to max. IP 23

� Ring core transformer vacuum impregnated with free wire and stranded conductor connections

� Same as above but with sealing of the remaining hole on installation plate or installation kit

� Ring core transformer in encapsulated housing as cast resin design (free wire and stranded conductor connections)

� Wear-resistant, heat, UV and solvent resistant nameplate

Internet: www.sba.de

Type RKTSINGLE-PHASE RING CORE TRANSFORMERS

9

[email protected] [email protected]

Special design versions

� Additional windings and taps � Thermal switch, thermal link, PTC thermistor

� Screen as wire or foil winding � Design according to VDE 0750 on request

� DC power supply with ring core transformer � Other design versions are possible

Overview

Size Rated output Total Copper dimensionsweight weight d h Fastening-

screwVA (DB) kg appr.kg approx. mm

380 10 0.3 0.1 58 32 M5

381 20 0.4 0.1 71 36 M6

382 30 0.5 0.2 73 38 M6

383 50 0.7 0.2 76 42 M6

384 63 0.9 0.3 78 45 M6

385 80 1.0 0.3 91 46 M6

386 100 1.2 0.4 93 48 M6

387 125 1.3 0.4 96 54 M6

388 160 1.6 0.6 118 49 M8

389 200 1.9 0.7 118 50 M8

390 250 2.3 0.8 119 50 M8

391 320 2.8 0.9 140 65 M8

392 400 3.4 1.3 140 67 M8

393 500 4.0 1.4 140 75 M8

394 630 5.0 1.8 142 79 M8

395 800 6.1 1.9 166 73 M8

396 1000 7.4 2.4 170 85 M8

The values in the table above are for the thermal steady state at 40°C ambient temperature.Note: Total height of the ring core equals dimension h plus the thickness (approx. 3 mm) of the installation kit.

SBA-TrafoTech GmbHWinkelleite 1491332 Heiligenstadt, Germany Telephone +49 (0)9198/8 09-19Facsimile +49 (0)9198/8 09-30

SBA-Trafobau Jena GmbHIlmstraße 1807743 Jena, GermanyTelephone +49 (0)3641/4514-0Facsimile +49 (0)3641/4514-30


14

Type RSTSingle-phase variable toroidal transformers to VDE 0552

Application

Autotransformers for the stepless setting of the AC output voltage between zero and maximum. Eliminates nearly allloss of performance from control of electrical consumers under load.

SI

10



(other output on request)Input voltage max. 230 VOutput voltage max. 0-230 VOutput current max. 63 AFrequency 50-400 HzVector group Ia0Protection class IProtection index IP 00Insulation class BAmbient temperature max. 40°C

11

Construction


� Three-point fixing

� Embedded in cast resin, only the contact decks are exposed

� Connection to screw terminal with additional clamp-type ter-minal

� Available with rotary button and dial


� Versions up to 6.3 A have a safe-to-touch cover acc. VBG 4


Type RSTINGLE-PHASE VARIABLE TOROIDAL TRANSFORMERS

* available ex stock



� With adjustment by (AC or DC) motor � Other voltages available

� With angular drive � With separated windings

Overview




Type Article no. Rated Rated Total Copper- dimensionsoutput current weight weight a b c d eVA(DB) kg appr. kg apprx. mm

RST 230/ 0.8 *700-0000 184 0.80 1.2 0.04 95 75 26 6 M4

RST 230/ 1.0 *700-0001 230 1.00 1.3 0.05 95 80 26 6 M4

RST 230/ 1.25 *700-0002 288 1.25 1.5 0.07 95 90 26 6 M4

RST 230/ 1.6 *700-0003 368 1.60 1.7 0.09 95 100 26 6 M4

RST 230/ 2 0 *700-0004 460 2.00 2.2 0.16 115 80 26 6 M4

RST 230/ 2.5 *700-0005 575 2.50 2.6 0.25 115 90 26 6 M4

RST 230/ 3.2 *700-0006 736 3.20 3.0 0.30 115 100 26 6 M4

RST 230/ 4.0 *700-0007 920 4.00 3.4 0.36 115 120 80 6 M6

RST 230/ 5.0 *700-0008 1150 5.00 4.0 0.37 114 116 80 6 M6

RST 230/ 6.3 700-0009 1450 6.30 5.2 0.70 148 110 110 10 M8

RST 230/ 8.0 700-0010 1840 8.00 6.2 0.90 148 120 110 10 M8

RST 230/10.0 700-0011 2300 10.00 7.3 1.00 148 130 110 10 M8

RST 230/ 12.5 700-0012 2875 12.50 9.3 1.20 170 130 110 10 M8

RST 230/ 16.0 700-0013 3680 16.00 13.0 1.60 190 150 110 10 M8

RST 230/ 20.0 700-0014 4600 20.00 16.0 2.15 230 155 150 10 M8

RST 230/ 25.0 700-0015 5750 25.00 19.0 3.15 270 155 150 10 M8

RST 230/ 32.0 700-0016 7360 32.00 20.0 3.25 270 200 150 10 M8

RST 230/ 40.0 700-0017 9200 40.00 26.0 4.50 315 210 150 10 M8

RST 230/ 50.0 700-0018 11500 50.00 39.0 6.00 270 250 150 10 M8

RST 230/ 63.0 700-0019 14490 63.00 46.0 8.00 315 280 150 10 M8

14

THType DRT

Three-phase variable toroidal transformers to VDE 0552

12

Application

Autotransformers for the stepless setting of the AC output voltage between zero and maximum level. Eliminatesnearly all loss of performance from control of electrical consumers under load.



(other output on request)Input voltage 3 x 400 VOutput voltage 3 x 0-400 VOutput current max. 63 AFrequency 50-400 HzVector group Ya0Protection class IProtection index IP 00Insulation class BAmbient temperature max. 40°C

13


Type DRTHREE-PHASE VARIABLE TOROIDAL TRANSFORMERS


Construction


� Three-point fixing

� Embedded in cast resin, only the contact decks are exposed

� Connection to screw terminal with additional clamp-type ter-minal

� Available with rotary button and dial


� Versions up to 6.3 A have a safe-to-touch cover acc. VBG 4


� With adjustment by (AC or DC) motor � Other voltage and current specifications available

� With angular drive � With separated windings

*4 tie rod squarish arrranged




Overview

Type Article no. Rated Rated Total Copper dimensionsoutput current weight weight a b c d eVA(DB) kg appr.kg approx. mm

DRT 400/ 0.8 705-0000 554 0.80 5.5 0.11 70 85 300 6 M10

DRT 400/ 1.0 705-0010 693 1.00 5.8 0.12 70 85 300 6 M10

DRT 400/ 1.25 705-0020 866 1.25 6.5 0.21 70 85 320 6 M10

DRT 400/ 1.6 705-0030 1109 1.60 7.4 0.36 70 85 320 6 M10

DRT 400/ 2 0 705-0040 1386 2.00 7.9 0.48 70 85 300 6 M10

DRT 400/ 2.5 705-0050 1732 2.50 9.5 0.75 70 85 320 6 M10

DRT 400/ 3.2 705-0062 2217 3.20 11.5 0.90 80 95 330 6 M10

DRT 400/ 5.0 705-0080 3464 5.00 14.0 1.11 80 95 360 6 M10

DRT 400/ 6.3 705-0091 4365 6.30 21.0 2.10 110 130 405 10 M12

DRT 400/ 8.0 705-0100 5543 8.00 24.0 2.70 110 130 435 10 M12

DRT 400/ 10.0 705-0112 6928 10.00 27.0 3.00 110 130 470 10 M12

DRT 400/12.5 705-0122 8660 12.50 30.0 3.60 110 130 470 10 M16

DRT 400/ 16.0 705-0130 11085 16.00 44.0 4.80 120 140 535 10 M16

DRT 400/ 20.0 705-0140 13856 20.00 55.0 6.75 150 170 570 10 M16

DRT 400/ 25.0 705-0150 17320 25.00 66.0 9.45 170 190 590 10 M16

DRT 400/ 32.0 705-0160 22170 32.00 70.0 9.75 210 230 655 10 M16

DRT 400/ 40.0 705-0171 27713 40.00 88.0 13.50 220 240 750 10 M16

*DRT 400/ 50.0 705-0180 34641 50.00 135.0 18.00 210 240 968 10 M20

*DRT 400/ 63.0 705-0190 43650 63.00 150.0 24.00 225 250 968 10 M20

1414

The following technical explanations provide useful informa-tion on important technical terms used in this catalog.Depending on the proposed use, additional or differentdefinitions may be required. The following explanations aretherefore not exhaustive.Ring core transformers have several important advantagesover two-limb core or shell-type transformers. Ring coretransformers of similar rating have up to 40 % less volumeand weight. Ring cores are available in nearly any size.Minimum no-load loss, little current consumption, no hum,negligible leakage fields and design to protection class IIare some of the features which are possible due to the inbo-ard and closed core.The technical feasibility of different geometries depends onthe height and the remaining hole in the finished ring coretransformer. For production reasons, high currents are hand-led by the parallel arrangement of windings.

Fusing

Fusing at the primary side is somewhat of a problem becau-se the inrush current can be as high as 25 times the ratedcurrent, which depends on the size and type of the ringcore transformer. For this reason, the input side fusing inmost cases provides protection only against short circuitand the fuses are slow-blowing.The required fuse on the secondary side is specified on thenameplate. Information on possible additional fusing of theprimary side is provided on request.

Connction

The system voltage of variable toroidal transformers shouldnot permanently exceed the nameplate rated input voltageby more than 5 % because the contact point at which cur-rent is tapped will become very hot due to higher windingresistance. The variable toroidal transformers are designedfor 50 to 60 Hz frequency and can be used with up to400 Hz frequency.

Vector group

The type in which the windings are connected is indicatedby the connection symbol. The connection symbol consistsof a capital letter and a small letter and a number designa-ting the phase position. The capital letter stands for the primary winding and thesmall letter for the secondary winding. If no customer speci-fication is available, ring core transformers are designed asautotransformers in I0 and as power or safety isolatingtransformers in Ii0. Variable toroidal transformers are gene-rally designed as autotransformers in Ia0 and Ya0, respecti-vely.

Drives

The mechanical stops limiting the rotation in variable toroi-dal transformers with manual adjustment must not be over-come by force. This can destroy the transformer.The motor drive in all transformers is stopped by limit swit-ches with adjustable control discs just before the end of themechanical rotation is reached. The rotation can be set asrequired by means of the discs.

General technical information


15




Protection types

The protection type marking consists of a code of two con-stant letters, viz. "IP" and two digits, e.g., IP 23.

Maintenance

Maintenance of our variable toroidal transformers is limited tocleaning the contact decks and inspection of the moving con-tacts for correct movement. Depending on the service conditi-ons, dust should be removed from the contact decks with asoft brush or air every 6 months or more frequently. The con-tact deck can be wiped clean with a cloth wetted with spirit.Black, bright traces on the contact deck which are left by thecarbon contact roller are no reason for concern. The carbonrollers must be true and turn properly when the setting of themoving contact is adjusted. Sticking, untrue or damaged car-bon contact rollers must be replaced.

The bearings of the carbon contact rollers must notbe lubricated.

Laws and regulations

Unless required otherwise, we make our ring core transfor-mers and variable toroidal transformers to reflect state-of-theart and comply with the following laws and regulations:

Ring core types :DIN EN 61558-1/ VDE 0570 part 1/07.98in conjunction with VDE 0750DIN EN 61558-2-2 / VDE 0570 part 2-2 /10.98DIN EN 61558-2-4 / VDE 0570 part 2-4 /07.98DIN EN 61558-2-6 / VDE 0570 part 2-6 /07.98DIN EN 61558-2-13 / VDE 0570 part 2-13/08.00

Variable toroidal types:VDE 0552

Weights, dimensions and the construction may change asdesign revisions take place.




First digit Protection

Description Explanation

0No protection No protection against contact of live parts

No protection against entry of solids.

2Protection againstmedium-size foreignobjects

Protection against contact of live parts by fin-gers Protection against entry of foreign objectsgreater than 12 mm

4Protection againstgranular foreignobjects

Protection against contact of live parts withtools, wires or the like of more than 1 mm thick-nessProtection against entry of foreign objectsgreater than 1 mm

5

Protection againstdeposits of dust

Complete protection against contact with liveparts.Protection against harmful dust deposits. Thepenetration of dust is not completely preven-ted but the dust must not affect operation.

6Protection againstpenetration of dust+

Complete protection against contact with liveparts.Protection against penetration of dust

Second digit Protection

Description Explanation

0 No protection No protection availableharmful effect.

1Protection againstdrops of water fal-ling vertically

Drops of water falling vertically shall have noharmful effect.

3Protection againstspray water

Water falling from any angle less than 60degrees from vertical shall have no harmfuleffect.

4Protection againstsplash water

Water splashing from any direction shall haveno harmful effect.

5Protection againstwater jets

A jet of water from a nozzle directed at thetransformer from any direction shall have noharmful effect.

6Protection againstflooding

No harmful amount of water to which thetransformer is exposed during a temporaryflooding must enter.

7

Protection againstimmersion…(atm(g))

If the transformer is immersed in water underspecified pressure and time, no harmfulamounts of water must enter the transformer.

16

Three-phase variable toroidal transformers

The neutral in three-phase variable toroidal transformers instar connection is brought out electrically isolated. The neu-tral must not be used to provide an artificial neutral point;every phase of such a transformer can be put under ratedcurrent load of the system neutral (neutral conductor) andthe transformer neutral are connected with each other.

Insulation classes

The provisions of IEC 60085 and IEC 60216 describe theheat resistance if insulation classes.

Protection class

The protection class is a design feature of a product whichdesignates safety against shock current.Protection class I: Product with safety ground terminal

and basic insulation Protection class II: Product without safety ground terminal

and double or extra strong insulation.Ring core transformers from SBA generally conform withprotection class II.

Ratings

The current and output ratings in the catalog are for continu-ous operation. The rated current can be tapped constantlyacross the full control range.

Installation and cooling

Operation at rated output is possible without restriction atambient temperatures of up to 40 °C and up to 1000 maltitude above sea level. If the transformer is installed in ahousing in which the ambient temperature rises to above 40 °C, the ring core transformer must either be cooled byfan or the rated current must be reduced as shown in thefollowing diagram.


100

95

90

85

80

75

Load

in %

of r

ated

outp

ut

40 45 50 55 60

Ambient conditions ta in °C


IInsulation classHighest permitted temperature at

rated service conditions

A 105°CE 120°CB 130°CF 155°CH 180°C

105°C120°C130°C155°C180°C


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Internet: www.sba.deSBA-TrafoTech GmbHWinkelleite 1491332 Heiligenstadt, Germany Telephone +49 (0)9198/8 09-19Facsimile +49 (0)9198/8 09-30



General Terms of Business 01/2002II..

II.. GGeenneerraallBy placing the order, the buyer accepts these "General Terms ofBusiness" as excusive basis for transaction of business. Buyer's terms,if any, are hereby expressly excluded and do not apply even inabsence of our express objection. Any other agreements are onlyvalid if made in writing.

IIII.. IIII.. PPrriicceessOur prices are without obligation and quoted ex works withoutpackaging and in EURO currency, exclusive of value-added tax,which will be charged at the rate applicable at the time of delivery.Copper prices of 150.00 EUR or more for each 100 kg lead toprice adjustment prorated the specified weight.

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Heiligenstadt/Ofr. or Jena.

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VVIIIIII.. SSeevveerraabbiilliittyyIf a provision of these General Terms of Business should be orbecome invalid, such invalidity does not affect the other provisions.The provision lacking validity will be replaced by another provisionwhich as nearly as possible reflects the original intention. If this isnot possible, the contract is invalid if continuing it would entailunreasonable hardship for either party.


WWW.SBA.DE

2/20

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SBA-TrafoTech GmbH

Winkelleite 1491332 Heiligenstadt, GermanyTelephone: +49 (0)9198/809-0Facsimile: +49 (0)9198/8 [email protected]

SBA-Trafobau Jena GmbH

Ilmstraße 1807743 Jena, GermanyTelephone: +49 (0)36 41/4514-0Facsimile: +49 (0) 36 41/[email protected]


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