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Ritz Instrument Transformers GmbH
Welcome
About RitzAbout Ritz
… together with over 200 years of experience in instrument
transformer production
since 1904
since 1945 since 1945since 1945
RITZ Group RITZ Group -- OrganizationOrganization
RITZ Foundation
HeadquartersKG Ritz Messwandler GmbH & Co.
Hamburg
RITZ MarchtrenkLow and
medium voltage
RITZ Shanghai
Medium voltage
RITZ Kecskemet
Components
Ritz Wirges
Medium voltage
RITZ Dresden
Medium voltage
Duromer DresdenResin and
Cast resin products
Ritz Kirchaich
Medium voltage
RITZ Instrument Transformers GmbHRITZ Hartwell
Low voltage
Ritz & It’s SubsidiariesRitz & It’s Subsidiaries
• Headquarters• Management / Administration / Finance / Controlling / Human Resources / R&D
• Medium voltage indoor and outdoor current andvoltage transformers up to 72,5kV
RITZWirges
RITZHamburg
Incorporated in 1945, Ritz is one of the leaders in the field of Instrument transformers and
solid insulated bus bars for the transmission of high current. Ritz production and sales
offices are located across the world
voltage transformers up to 72,5kV• Cast resin insulated distribution transformers up to 20 MVA
• Medium voltage indoor current transformer
• Fully insulated busbar systems
• Medium voltage indoor current and voltage transformers up to 36kV
• Ring core current transformers
• Customized cast resin products
Wirges
RITZDresdenDuromer
RITZKirchaich
• Iron Cores and components for CT´s
• Sub-supplier for the RITZ group
RITZKecskemét
(Hungary)
Ritz & It’s Subsidiaries Ritz & It’s Subsidiaries (Cont…)(Cont…)
RITZMarchtrenk(Austria)
• Medium voltage indoor and outdoor current and voltagetransformers up to 72,5 kV
• Complete range of low voltage current and voltage transformers
• Transformers for rail vehicels
• Sales office
• Medium voltage current and voltage transformers
• Ring core current transformers
(Hungary)
RITZShanghai
(China)
RITZ Hartwell
(USA)
• Low voltage current and voltage transformers
Low Voltage TransformersLow Voltage Transformers
- Epoxy resin current and voltage transformers- Current and voltage sensors, epoxy resin insulated- Combined current / voltage sensors
Medium Voltage Instr. Transf. Medium Voltage Instr. Transf. -- IndoorIndoor
- Epoxy resin current and voltage transformers- Designs up to 72,5 kV
Medium Voltage Instr. Transf. Medium Voltage Instr. Transf. -- OutdoorOutdoor
MetalMetal--enclosed Instrument Transformersenclosed Instrument Transformers
Generator Current TransformersGenerator Current Transformers
Special Transformers for TrainsSpecial Transformers for Trains
Production Equipment- Primary Winding Machines- Secondary Winding Machines- Kiln for heating up process of the active part- Casting Machine with 18 clamping machines- Kiln for cooling down process of the product after molding process
Test Equipment- Insulation Test
Production & Test EquipmentProduction & Test Equipment
- Insulation Test5 kV voltage tester
- Partial Discharge testTest transformer for 150 KVA AC/1AMeasuring condenserPartial Discharge Measurement Equipment
- AccuracyHigh Current Standard Transformer for 5000 ABurden according to IEC & IEEE standard
Power TransformersPower Transformers
• Glass-fibre-vacuum technology up to 36kV & 20MVA
Application range
• Power Distribution• Rectifier Drives • Generator Excitation• Transmitter Systems
Epoxy Cast Resin Power Transformers 50 kVA bis 20 MVA
RITZ manufacture dry type transformers for ratings up to 20 MVA and 36 kV
Power Power Transformers Transformers (Cont…)(Cont…)
• Transmitter Systems• Earthing Systems • Traction Supply systems• Oil Platforms / Vessels• Laboratory systems
Customized service• Transformer Installation• Disposal of existing oil
and PCB Transformers• Start-up
30 kV; 20MVA rated power; total weight 38 t
3 phase transformer bank
Power: 8055 KVAWidth: 1,80mHeight: 3,00mLength: 6,90mGewicht: 18.3 t
Power Power Transformers Transformers (Cont…)(Cont…)
Construction design by application of the latest design systems in 2D & 3D
Winding of a transfomer cast coil for HV side max. diameter 1,3m
Test facility Thermo scan of a 5MVA power transformer during heat run test
Fully Insulated Bus Bar System Fully Insulated Bus Bar System -- SISSIS
SIS - Solid Insulation System
Electrical Rating Parameters:
• System voltage up to 52 kV.
• Rated current up to 6.000 A single system.
• Double system up to 12.000 A.
• Partial discharge free up to 1,5x phase to ground
voltage
System Specific Benefits
• Compact design
• Low space requirement
• Small bending radii
• 3-dimensional geometric shape
• No maintenance
Production Length
• 13 m x 3 m x 3 m
SIS SIS -- Company HistoryCompany History--MWBMWB
• Established 1946 by Dr. Ing. Friedrich Raupach
• 1956 first fully resin insulated instrument transformer
• 1965 first resin insulated outdoor instrument transformer
- In 1984, Ritz produced first installation of SIS bus bars
• 1989 MWB is split into three different companies -
Establishment of MWB Mittelspannung GmbHEstablishment of MWB Mittelspannung GmbH
• 1992 sale of MWB Mittelspannung to Sadtem
• 1999 establishment of MWB Messwandler GmbH as 100%
daughter of WTW Wirges GmbH
• 2007 merger of the companies WTW, MWB and Ritz to
RITZ Instrument Transformers GmbH
SIS SIS –– Bus Bar Design PrincipleBus Bar Design Principle
1 Aluminum or copper conductor.
2 The main insulation consists of epoxy resin impregnated crepe paper.
The impregnation process is performed under vacuum.
3 Capacitive graded area – implementing of capacitive layers by using semi-conductive
crepe paper.
4 The last layer is grounded and ensure touch-safe bus bar.
1 23 4
SIS SIS –– Production ProcessProduction Process
Indoor Bus Bar
• Paper insulated conductor, vacuum sealed by using a shrinking sleeve.
• Drying process under vacuum.
• Impregnation process conducted under vacuum.
• Total process under temperature control.• Total process under temperature control.
Outdoor Bus Bar – Additional Steps
• Indoor Bus bar covered by stainless steel tube.
• Adding of outdoor material.
SIS SIS –– Multiple Bus Bar ConnectionMultiple Bus Bar Connection
Performed with flexible connectors
• Allows thermal compensation.
• Compensating of installation
tolerances
Connecting Sleeve
• Fully insulated Contact Tube
Insulated Bus Bar
Insulated Connecting Sleeve
Contact Spring
Expansion Joint
• Touch safe
• Capacitive graded
• Protection class IP45, higher classes
on request
Grounding Screw
SIS SIS –– End Bus Bar ConnectionEnd Bus Bar Connection
• Conductor end with flat terminal according DIN
42 206
• Conductor end with round bolt
• According to customer’s specification
• Gas-tight connection to GIS switchgear• Gas-tight connection to GIS switchgear
- Metal flange fixed on the beginning of the
grounded part of the bus bar
- Connection by using contact bolts – standard
- Customized design
1. Contact bolt 2. Conductor
3. Insulation 4. Metal flange
FlangeResin cone
Earthing screw
ConductorPaper resin
SpringContact bolt
SIS SIS –– FixationFixation
Flexible mounting system – Ritz design
• Aluminum C-profiles
• Standard angles
• Hammer head screw (T-screw)
• Fixing clamps
- Fixed bearing
- Slide bearing to allow axial move to allow movement caused by thermal expansions.expansions.
Calculation Criteria
• Short circuit forces
• Natural system frequency & its harmonics to avoid resonances
• Bus bar diameter
• Phase distance
• Mass of bus bar
• Bending strength
SIS SIS –– ApplicationApplication
Sample of a drawing sheet
SIS SIS –– Application Application (Cont…)(Cont…)
Bus Bar Installation Example
• Taking care of intersection of other metal constructions minimum distance 300 mm
• 24 kV
• 3150 A
• Horizontal
connecting sleeveconnecting sleeve
• Vertical connecting
sleeve
SIS SIS –– ApplicationApplication (Cont…)(Cont…)
Wall bushing entering a switchgear from underneath
Connection sleeves vertical
mounted
SIS SIS –– ApplicationApplication (Cont…)(Cont…)
Connection within a compartment of an air insulated switchgear
Connection with sealing flanges
SIS SIS –– Indoor ApplicationIndoor Application
Indoor Installation
Limited space conditionsTwo Indoor Systems parallel
Indoor Installation
Bus Bar with Current Transformer Installation
SIS SIS –– Outdoor ApplicationOutdoor Application
Outdoor installation with roofing – connection to transformer
Capacitive grading of bus bar
insulation covered by cast-on
sheds to increase creepage
distance
SIS SIS –– Outdoor ApplicationOutdoor Application (Cont…)(Cont…)
Outdoor Installation
Connection of a Power Transformer with High Flexible
Connectors
Outdoor Installation
Sealing of a connection point (transformer box) with rubber
bellows (IP64)
SIS SIS –– Outdoor ApplicationOutdoor Application (Cont…)(Cont…)
Outdoor InstallationSealing of a connection
sleeve (IP 64)
Outdoor Installation
Bus Bar routing
Ritz Instrument Transformers GmbH
Thank You for Thank You for Your
Attention