Gas Insulated Ring Main Unit RVAC. Professional solutions. Reliable power.

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1 Gas Insulated Ring Main Unit RVAC Professional solutions. Reliable power.

2 Energising a world that demands more. We deliver: Electrical solutions that use less energy, improve power reliability and make the places we live and work safer and more comfortable Hydraulic and electrical solutions that enable machines to deliver more productivity without wasting power Aerospace solutions that make aircraft lighter, safer and less costly to operate, and help airports operate more efficiently Vehicle drivetrain and powertrain solutions that deliver more power to cars, trucks and buses, while reducing fuel consumption and emissions Discover today s Eaton. Powering business worldwide As a global power management company, we help customers worldwide manage the power needed for buildings, aircraft, trucks, cars, machinery and businesses. Eaton s innovative technologies help customers manage electrical, hydraulic and mechanical power more reliably, efficiently, safely and sustainably. We provide integrated solutions that help make energy, in all its forms, more practical and accessible. With 2015 sales of $20.9 billion, Eaton has approximately 100,000 employees around the world and sells products in more than 175 countries. Eaton.com

3 MV switchgear technology is in our DNA Eaton is a worldwide leader in the design, manufacture, and sale of safe, reliable and high-performance medium voltage power distribution equipment in accordance with IEC, ANSI and GB / DL standards Complete Global Medium Voltage Switchgear Solutions Eaton, a premier leader in designing and manufacturing power distribution and protection equipment in the electrical industry, offers a comprehensive range of medium voltage (MV) solutions to meet the needs of virtually every application. From products that feature cutting-edge design that allow for easy access, maintenance and space savings, to arc-resistant products that enhance safety, Eaton s medium voltage solutions provide a variety of products for every need. Additionally, Eaton s global service network provides maximum customer support in all regions of the world. As one of the few completely vertically integrated and diversified industrial manufacturers in the world, Eaton designs not only MV assemblies, but also the key components that comprise the MV solutions from steel housing and circuit breaker compartments to vacuum interrupters, circuit breakers, bus systems and fuses. Eaton s MV heritage, strengthened by acquisitions such as Westinghouse, Cutler Hammer, MEM and Holec, has resulted in breakthrough MV technologies and numerous international patents over the years. Part of Eaton s complete electrical PowerChain Solutions which help businesses minimize risks while realizing greater reliability, cost efficiencies, capital utilization and safety Eaton s medium voltage equipment meets all applicable standards and certifications such as IEC, NEMA / ANSI, GB / DL, UL, IEEE, KEMA and CSA. When it comes to medium voltage solutions, you can trust the one name with a long history of proven performance: Eaton. RVAC Ring main unit April

4 RVAC Ring main unit Currently, the development of a grid system is focused on application of ecological resources, requiring a medium-voltage switchgear which is characterised by energy conservation, low operating cost, reliable performance and flexible configuration. Featuring long service life, compact structure and reusability, the RVAC RMUs have become a role model economically and ecologically. With rapid development of urbanisation, the improvement and perfection of buried cable system has loomed large in terms of equipment and many other aspects. Ring main units (RMU), as the main equipment for protection and sectional isolation of the buried cable system, have been widely used in the urban grid system with their safe and reliable performance, compact and pleasant appearance, and outstanding cost performance. As the leader in the distribution switch gear field, Eaton Cooper Power Systems (ECPS) started design and production of high-quality distribution switchgears as early as 1942, with over 2,000,000 switchgears in proper operation throughout the world up to now. RVAC RMUs are fully sealed and insulated switchgears developed by ECPS exclusively for the cable system, and have been extensively applied in the urban grid system across the country since introduction in 1995 with their excellent operating performance. RVAC RMU s are characterized by the following: Insulation using SF6 gas Three position SF6 Switch as the breaking device in the load switch unit to break rated current Vacuum arc-extinguishing chamber as the breaking device in the circuit breaker unit to break short-circuit current. Based on the design principles of all insulation and omniseal, all primary parts of a RVAC RMU are fully enclosed in the SS main case, free from condensation and foreign materials. The main case has the protection grade of IP67 and is equipped with Cooper touchable waterproof cable joints to protect against occasional floods in flood-prone areas 3 4 RVAC Ring main unit April 2017

5 RVAC ring main unit construction features Smart grid readiness The RVAC RMU s product design, remote communication, remote metering and remote control are adopted for feeder automation and load management of the smart grid. Safe Use Logic mechanical and electrical interlock; Reliable grounding of housing, ensuring zero potential of contact interface; Enclosed compartment, effectively avoiding entering the live compartment unintentionally; Capacitive voltage indicator system, providing effective potential indication; Grounding of main circuit via the grounding switch with large switching capacity Economy and Environmental-friendliness Energy consumption, low operating cost, and more reasonable cost input; Only reusable and/or recoverable materials are used for production of the most compact parts Gas leak rate of 1%/a under normal service conditions ensure the service life of over 30 years; Handling and use of SF6 gas are not involved during the installation, operation, extension and replacement of the equipment Easy Use Both cable connection and user interface in the front of the cabinet, allowing for easy maintenance; Large space for cable installation, allowing for easy installation; Provision of special LV meter cabinet as required by users; Simplified and legible operation panel, allowing for easy operation Modularised Design Modularised design, allowing for flexible combination of modules to realise multiple units sharing a case or separating cases, meeting requirements of different customers; Flexible onsite module extension for units, allowing for easy building of MV sub-stations as required; Switch-fuse combination and breaker with relay protection available for transformer and circuit protection All Weather SF6 gas tank is made of SS plates, presenting pleasant appearance and free from salt water, wet, foreign materials and external temperature; The main case has the protection grade of IP67 and is equipped with Cooper prefab shielded touchable cable accessories, allowing for long-term operation underwater or at other extreme conditions. Safe Operation Designed in strict accordance with GB and DL certification standards; Tested and certified in accordance with prevention of internal arching under GB3906 and; IEC Quality assurance in compliance with ISO9001; All HV live parts fully enclosed in the main case and inaccessible; Frequency voltage withstand at zero gauge pressure and full load breaking available RVAC Ring main unit April

6 Main construction Vacuum technology features SF6 gas insulated system Load break switch As the leader in the vacuum technology field, Eaton carries forward the innovation of vacuum Westinghouse and HOLEC arc-extinguishing chambers; As a pioneer in the vacuum technology field, Eaton boasts over 90 years of technical experiences; The first arcextinguishing chamber was launched for the first time in 1967 for 15kV-12kA switching system. Eaton is the first enterprise to develop proprietary technologies for copper-chromium alloy contactor and inner shield; The arc-extinguishing chamber developed by Eaton for contactor has a long service life of 2,500,000 operations; Over 5,000,000 arc-extinguishing chambers of various types have been applied in the grids at different ambient conditions; Almost all of global high-end electrical equipment manufacturers are our purchasers of our arc-extinguishing chambers. Product design All primary HV components are enclosed in SF6 gas tank, free from ambient conditions and maintenance and ensuring full insulation; SF6 gas tank is made of SS materials, presenting enduring pleasant appearance and free from salt water, wet, foreign materials and external temperature; The main case has the protection grade of IP67 and is equipped with Cooper prefab shielded touchable cable accessories, allowing for longterm operation underwater or at other extreme conditions. Advanced gas shielded welding and the pressure seal system with the leak rate of 1 /a is available, ensuring a service life of 30 years; The option of an extensible busbar is available. As standard, the busbar is not extensible. The load switch is a three-position switch for opening, closing and grounding. The movable blade at the opening position provides enough insulation distance. Opening and closing of master switch and grounding switch can be available respectively with one operating handle, and master switch and grounding switch are mechanically interlocked. Arc-extinguishing with deionised metal grating for load switch ensures excellent breaking performance; The operating mechanism controls moving speed of contactor of the load switch so that the switch on and off speed of the load switch will not vary with operators. When the switch undergoes closing to opening, arc is extinguished and current is cut off relying on contactor speed and simultaneous action of arch-extinguishing device; The operating mechanism is of spring type. Opening and closing can be available with an operating handle, and remote control can also be realised by installation of electrical operating mechanism and opening solenoid. RVAC are human-oriented distribution products developed with advanced R&D technologies and resources, characterised by compact structure, reliable performance, flexible configuration, economy, environmental-friendliness Mechanical movement analysis Speed analysis Stress analysis Magnetic field analysis Computer stimulation design With prominent finite element modeling and analysis capabilities, Eaton teams have utilized 3D simulation software to ensure an optimized structure and design. Studies of electric field distribution, electrodynamic force, temperature and fluid flow fields and internal arcing have combined to provide a highly reliable end product. Mechanical strength analysis Gas pressure analysis Electric field analysis Gas motion analysis 6 RVAC Ring main unit April 2017

7 Product features The capacitive voltage detection system is used to validate whether the power is safely isolated or not. Various cabinets for RVAC series are equipped with the standard threephase capacitive voltage detection system to detect potential of circuits, the potential indicator effectively detects and communicates to operators whether a circuit is live or not. Logic mechanical and electrical interlock preventing mal-operation In RVAC design, different interlocks are adopted to prevent mal-operation by operators. The interlock includes mechanical interlock and electrical interlock. For example, electrical interlock and mechanical interlock can prevent operation of the disconnector when the breaker is switched on. All mechanical interlocks adopt effective direct locking. The switch can be operated to power supply position only when the door of cable chamber is closed. The door of cable chamber can be opened only when the switch is at the grounding position. The grounding switch can be switched off only when the door of cable chamber is completely closed. The master switch can be closed only when the grounding switch is opened to supply power. Enclosed cases to keep out foreign materials. In RVAC design, it is impossible that operators or tools unintentional entering the cabinets. Human-oriented design. The design of all compartments in RVAC cabinet is based on the concept of safe touch from the outside. With human-oriented design, operators will not be injured by motion parts or protruding parts when operating the panel. Delivery test. RUM s are subject to strict process test and delivery test in accordance with relevant regulations. For quality assurance, all production processes conform to ISO9001. This means relevant components, switches and current transformers will be tested at each production phase to confirm their conformance. After the equipment is assembled as a piece, appearance inspection, mechanical, functional and electrical tests will be conducted for the complete set. Concept of internal Arc prevention Eaton has always been committed to production of safe switchgear for operators. For operators, the biggest potential risk is internal arc inside the switchgear. Therefore, the designers employ all necessary methods to prevent internal arc in design of the product. As required under GB3906, Eaton supports the philosophy that it is best to avoid internal arcs than to cure. In the RVAC design, a double prevention method is implemented. Firstly, RVAC design adopts a structure in which arcs are internally prevented. In the unlikely case an internal arc does occur, pressure from this arc may be relieved through the specially designed channels to ensure maximum safety of operators and minimize damage to the rest of the switchgear and room Load break switch panel K Load break switch-fuse combination panel T Circuit breaker panel V & CB Rise panel A & B Busbar coupler L(k) Busbar coupler L(v) Metering panel M Voltage transformer panel PT 8 RVAC Ring main unit April

8 Main performance & characteristics Merits of enclosed case All primary live parts fully enclosed in metal cases Maintenance free Internal arc proof Protection grade as high as IP67 to protect against floods Compact design Least space occupation Low construction cost Easy installation Computer-based simulation design 3D simulation design and analysis software adopted in R&D process to improve R&D capacity and product reliability Electric field analysis Magnetic field analysis Gas pressure and motion analysis Mechanical strength analysis Mechanism kinematics (speed and stress) analysis Finite element analysis Smart Grid compatible Auto upgrade Remote switch on/ switch off Auxiliary contact available at each switch position Metering signal of instrument transformer Accessories optional Trip indicator with auxiliary contact Failure indicator Amperemeter Flexible solution Reliable bus extension design and reserved interface for future expansion A full range of functional units Sulfur Hexafluoride (SF6) gas The insulating and arc quenching medium -SF6 SF6 gas has been successfully applied in relative HV circuit breakers, and has been increasingly used in the MV load switch system in recent years. This is a global phenomenon. The media previously used for insulation and arc extinguishing (air, oil and solids) has critical defects as follows: The air insulation system occupies large space and needs to be maintained at extreme weather or ambient conditions The oil insulation system is free from influence of ambient conditions, but will cause high safety risks in case of internal failure The solid insulation system needs to be maintained, much like the air insulation system. However, the maintenance proves to be more difficult due to its compact structure. As a medium for insulation, SF6 gas has rather high dielectric strength so that the product can have a very compact structure and be free from maintenance as all live parts are enclosed. SF6 gas is non-toxic, inert, and heavier than air in electronegativity. In addition to insulation, it has outstanding arc-extinguishing capability. When high-temperature arc occurs due to circuit breaking, SF6 gas will decompose into sub-fluorides. After cooling, these active sub-fluorides will turn to SF6 gas swiftly. As a result, enclosed SF6 gas will not decrease or deteriorate after numerous arc extinguishing in long-term use. The amount of arc decomposer is relevant to moisture contained in SF6 gas. Therefore, it is very important to keep water content under specified alue. Absorbents such as activated aluminum oxide, activated carbon or synthetic zeolite are commonly used to remove water and arc decomposer. This means the initial volume of gas that was introduced serves as the operating mechanism throughout its entire service life. When insulation alternatives are assessed on advantages and potential risks there is yet to be a more suitable solution than SF6 when considering technical and ecological factors. Instruction for SF6 Disposal 1. Eaton s policies prohibit emission of SF6 into air at installation, maintenance or scrapping of the equipment. SF6 which cannot be recovered or reused, can be disposed in an environmentalfriendly way to finally generate natural products CaSO4 and CaF2. 2. For more details, refer to the IEC Technical Report 1634(1995): HV Switch Cabinet and Control Cabinet - Application and Disposal of SF6 in HV Switch Cabinet and Control Cabinet, Chapter 6.5: SF6 Disposal at End Of Service - Aeration Equipment. 8 RVAC Ring main unit April 2017

9 Configuration information Load break switch panel (Function K) kv W mm D mm H mm Weight kg Lift panel (Function A/B) kv W mm D mm H mm Weight kg Note: A without gas tank; B with gas tank Standard 630A load break switch SF6 pressure gauge Voltage presence indicator Reliable interlock Operating handle Cable clamp and bracket Options Extension on both sides Lateral incoming and outgoing Motorization mechanism Bottom plate Cable inspection window Short circuit fault indicator Earthing switch Standard Voltage presence indicator 630A bushing SF6 pressure gauge Voltage presence indicator Operating handle Cable clamp and bracket Padlock for cable compartment cover Options Extension on both sides Lateral incoming and outgoing Cable inspection window Short circuit fault indicator Current meter Bottom plate Load break switch-fuse combination panel (Function T) kv W mm D mm H mm Weight kg Standard 630A load break switch Earth switch Fuse tube SF6 pressure gauge Voltage presence indicator Reliable interlock Operating handle Cable clamp and bracket Options Extension on both sides Lateral incoming and outgoing Motorization mechanism Electric shunt release Bottom plate Cable inspection window Short circuit fault indicator RVAC Ring main unit April

10 Configuration information The guide for fuse selection inations). OD O45 The length after fuse blown 30max(Spring type) A 34 A+68 Fuse selection and transformer application Rated voltage (kv) XRN-T/12 Rated fuse current (A) Length A (mm) Diameter D (mm) / 6.3 / 7.5 / 10 / 16 / 20 / 25 / 31.5 / / 63 / / XRT / 6.3 / 7.5 / / 20 / 25 / / 50 / 63 / / Rated voltage (12kV) Transformer rated capacity (kva) Fuse rated current (A) Rated voltage (24kV) Transformer rated capacity (kva) < Fuse rated current (A) Circuit breaker panel (Function V) Circuit breaker panel (Function CB) kv kv 12 W mm W mm 480 D mm D mm 800 H mm H mm 1400 Weight kg Weight kg 220 Standard 630A vacuum breaker 3-position disconnector SF6 pressure gauge Voltage presence indicator Reliable interlock Operating handle Cable clamp and bracket Options Extension on both sides Lateral incoming and outgoing Motorization mechanism Two cable outgoing lines Cable inspection window Short circuit fault indicator Protection relay Standard 630A vacuum breaker 3-position disconnector SF6 pressure gauge Voltage presence indicator Reliable interlock Operating handle Cable clamp and bracket Options Extension on both sides Lateral incoming and outgoing Motorization mechanism Two cable outgoing lines Cable inspection window Short circuit fault indicator Protection relay 10 RVAC Ring main unit April 2017

11 Configuration information Busbar coupling panel (Function L) Circuit-breaker type L(k) Circuit-breaker type L(v) kv kv W mm W mm D mm D mm H mm H mm Weight kg Weight kg Standard Voltage indicator 630A LBS 630A load break switch Options 630A CB Motor operation type L (k) type L (V) Metering panel (Function M) / Voltage transformer panel (Function PT) Function M Function PT kv kv W mm W mm D mm D mm H mm H mm Weight kg Weight kg Standard Electromagnetic lock (with live latch) PT PT protection fuse CT Meter Voltage presence indicator Voltage meter Current meter Transfer switch Options Temperature and humidity controller Voltage loss meter Energy meter Function M Function PT RVAC Ring main unit April

12 Main components Voltage indicator This device, with holes for phase comparators, on all functional units makes it possible to check the presence (or absence) of voltage in cables. Cooper screened separable connectors Fault indicator Connection mode This indicator is used for detecting and indicating ground fault and short-circuit fault in corresponding cable sections. The indicator light flashes and sounds an alram when short-circuit fault or single-phase ground fault occurs in the power distribution system. The Cooper screened separable connectors are used for the connection of extruded polymeric cable to transformers, switchgear, motors and other equipment with a premolded screened separable connectors for XLPE insulated 1 or 3-core cabled with aluminum or copper conductors. Extension interface The extension interface is used for future extensions connected to another RVAC module. Busbar Linker Busbar linkers connect existing module RVAC with another module RVAC. Busbar ender stop Use the Busbar ender stop to protect the main busbar bushing when the cabinet is reserved for future expansion on extension interface, and the busbar linker is not installed. Insulation cap Use an insulation cap to protect the busbar bushing when the cabinet is reserved busbar bushing for transformer on the main busbar side, and the cable plug is not installed. 14 PBD protection relay 3-phase 3-step directional current protection (quick break, timed quick break, over-current inverse time), with low voltage locking function 3-phase 3-time reclosing (inspection for no voltage, inspectionfor synchronization, no inspection), the number of reclosing operations can be set, including the function of post-acceleration Zero sequence voltage locking direction zero sequence over current protection (alarm, optional tripping operation) Low current grounding line selection function Low voltage protection Overload alarm 24V DC PSW Self-powered protection device The PSW self-powered protection device is a kind of protection device for 10 kv feeder lines which has over current, instantaneous trip and ground protection functions. This product can be used in conjunction with the ONT-W series current transformers (CT). The power is supplied from line current through CT, so over current, instantaneous trip and ground protection for distribution network lines could be achieved without auxiliary power supplies by driving low power trip coils. PSW 100 Function: Definite time over current protection (ANSI 50/51) Definite time instantaneous trip protection (ANSI 50/51) Inverse time over current protection (ANSI 50/51) Definite time single phase to ground protection (ANSI 50N/51N) 12 RVAC Ring main unit April 2017

13 RVAC Technical data Rated voltage kv Power frequency withstand voltage (1min) Phase to phase/phase to earth kv Between isolating distance Lightning impulse withstand voltage (BIL) Phase to phase/phase to earth kv Between isolating distance Rated frequency Hz Internal arc classification (IAC) ka-s AFLR 20-1 AFLR 20-1 Degree of protection in service IP3X IP3X Degree of protection with doors/covers open IP2X IP2X Busbar system Rated normal current A Rated short-time withstand current ka-s Rated peak withstand current ka Load break switches panel Rated normal current A Rated short-circuit making current ka Rated short-time withstand current ka-s 20-Apr 20-Mar Mechanical endurance class (Lood break switch) M M Mechanical endurance class (Earthing switch) M M Electrical endurance class (active load breaking capacity 630A) E3 E3 Circuit-breakers panel Rated normal current A Rated breaking current ka Rated short-circuit making current ka Rated capacitive switching current class C2 C2 Mechanical endurance class (Circuit-breakers) M x M Mechanical endurance class (Earthing switch) M M Electrical endurance class E2 E2 Rated short-time withstand current ka-s Mechanism type O - 0.3s - CO - 180s - CO O - 0.3s - CO - 180s - CO Switch-fuse combination panel Normal current of load-break switch A Normal current with fuses A Rated breaking current ka Rated short-circuit making current ka Rated transfer current A For others, please contact local Eaton sales representative. RVAC designed to IEC standards IEC IEC IEC IEC IEC IEC Common specifications for high-voltage switchgear and controlgear High-voltage switches for rated voltages above 1kV up to and including 52 kv High-voltage alternating current disconnectors and earthing switches A.C. metal-enclosed switchgear and controlgear for rated voltages above 1kV and up to including 52kV High-voltage alternating-current circuit breakers High-voltage alternating current switch-fuse combinations for rated voltage above 1kV up to and including 52kV RVAC Ring main unit April

14 1400 RVAC Outlines and dimensions Type K panel dimension Type T panel dimension (12kV) 870 (24kV) (12kV) 870 (24kV) Type V panel dimension Type M panel dimension (12kV) 520 (24kV) 800 (12kV) 870 (24kV) 750 (12kV) 800 (24kV) 850 (12kV) 870 (24kV) 14 RVAC Ring main unit April 2017

15 H A (Chassis) I Basic installation diagram 6-Ø14 Unit E G B (8# steel channel) C K M T V 370 D 370 F This row of mounting holes is available as an option The front of the switchgear Recommended floor plan 10 I II C 800~1000 Chassis M8 x 30 M8 x 30 (8# steel channel) Chassis (8# steel channel) 23.5 I II RVAC Ring main unit April

16 Eaton s electrical business is a global leader with expertise in power distribution and circuit protection; backup power protection; control and automation; lighting and security; structural solutions and wiring devices; solutions for harsh and hazardous environments; and engineering services. Eaton is positioned through its global solutions to answer today s most critical electrical power management challenges. Eaton is a power management company with 2016 sales of $19.7 billion. Eaton provides energy efficient solutions that help our customers effectively manage electrical, hydraulic and mechanical power more efficiently, safely and sustainably. Eaton has approximately 95,000 employees and sells products to customers in more than 175 countries. For more information, visit Eaton Eaton Industries Pty Ltd ABN Kent Road Mascot NSW EATON Eaton All Rights Reserved Printed in Australia Publication no. AUS17_RVAC02 April 2017 Eaton is a registered trademark. All other trademarks are property of their respective owners.