Ritz Instrument Transformers GmbH Welcome
About Ritz together with over 200 years of experience in instrument transformer production since 1945 since 1945 since 1945 since 1904
RITZ Group - Organization RITZ Foundation Headquarters KG Ritz Messwandler GmbH & Co. Hamburg RITZ Marchtrenk Low and medium voltage RITZ Instrument Transformers GmbH Ritz Wirges Ritz Kirchaich RITZ Dresden RITZ Shanghai Medium voltage RITZ Hartwell Low voltage Medium voltage Medium voltage Medium voltage RITZ Kecskemet Components Duromer Dresden Resin and Cast resin products
Ritz & It s Subsidiaries 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 RITZ Hamburg Headquarters Management / Administration / Finance / Controlling / Human Resources / R&D RITZ Wirges Medium voltage indoor and outdoor current and voltage transformers up to 72,5kV Cast resin insulated distribution transformers up to 20 MVA RITZ Kirchaich Medium voltage indoor current transformer Fully insulated busbar systems RITZ Dresden Duromer Medium voltage indoor current and voltage transformers up to 36kV Ring core current transformers Customized cast resin products
Ritz & It s Subsidiaries (Cont ) RITZ Marchtrenk (Austria) RITZ Kecskemét (Hungary) RITZ Shanghai (China) Medium voltage indoor and outdoor current and voltage transformers up to 72,5 kv Complete range of low voltage current and voltage transformers Transformers for rail vehicels Iron Cores and components for CT s Sub-supplier for the RITZ group Sales office Medium voltage current and voltage transformers Ring core current transformers RITZ Hartwell (USA) Low voltage current and voltage transformers
Low Voltage Transformers
Medium Voltage Instr. Transf. - Indoor - Epoxy resin current and voltage transformers - Current and voltage sensors, epoxy resin insulated - Combined current / voltage sensors
Medium Voltage Instr. Transf. - Outdoor - Epoxy resin current and voltage transformers - Designs up to 72,5 kv
Metal-enclosed enclosed Instrument Transformers
Generator Current Transformers
Special Transformers for Trains
Production & Test Equipment 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 5 kv voltage tester - Partial Discharge test Test transformer for 150 KVA AC/1A Measuring condenser Partial Discharge Measurement Equipment - Accuracy High Current Standard Transformer for 5000 A Burden according to IEC & IEEE standard
Power Transformers Glass-fibre-vacuum technology up to 36kV & 20MVA
Epoxy Cast Resin Power Transformers 50 kva bis 20 MVA RITZ manufacture dry type transformers for ratings up to 20 MVA and 36 kv Application range Power Transformers (Cont ) Power Distribution Rectifier Drives Generator Excitation 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 KVA Width: 1,80m Height: 3,00m Length: 6,90m Gewicht: 18.3 t
Power Transformers (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 - SIS 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 - Company History-MWB 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 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 Bus 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 3 2 4
SIS Production 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. Outdoor Bus Bar Additional Steps Indoor Bus bar covered by stainless steel tube. Adding of outdoor material.
SIS Multiple Bus Bar Connection Performed with flexible connectors Allows thermal compensation. Compensating of installation tolerances Connecting Sleeve Insulated Bus Bar Expansion Joint Insulated Connecting Sleeve Contact Spring Fully insulated Contact Tube Touch safe Capacitive graded Protection class IP45, higher classes on request Grounding Screw
SIS End 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 - Metal flange fixed on the beginning of the grounded part of the bus bar - Connection by using contact bolts standard - Customized design Resin cone 1. Contact bolt 2. Conductor 3. Insulation 4. Metal flange Flange Earthing screw Contact bolt Spring Conductor Paper resin
SIS Fixation 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. Calculation Criteria Short circuit forces Natural system frequency & its harmonics to avoid resonances Bus bar diameter Phase distance Mass of bus bar Bending strength
Sample of a drawing sheet SIS Application
SIS Application (Cont ) Bus Bar Installation Example Taking care of intersection of other metal constructions minimum distance 300 mm 24 kv 3150 A Horizontal connecting sleeve Vertical connecting sleeve
SIS Application (Cont ) Wall bushing entering a switchgear from underneath Connection sleeves vertical mounted
SIS Application (Cont ) Connection within a compartment of an air insulated switchgear Connection with sealing flanges
SIS Indoor Application Indoor Installation Limited space conditions Two Indoor Systems parallel Indoor Installation Bus Bar with Current Transformer Installation
SIS Outdoor Application Outdoor installation with roofing connection to transformer Capacitive grading of bus bar insulation covered by cast-on sheds to increase creepage distance
SIS Outdoor Application (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 Outdoor Application (Cont ) Outdoor Installation Sealing of a connection sleeve (IP 64) Outdoor Installation Bus Bar routing
Ritz Instrument Transformers GmbH Thank You for Your Attention