Sfarm fully complies with the following iec standards used under general operation conditions for indoor switchgears. Due to the compact construction and the fully insulated design it can be installed in very small areas in transformer stations, high rise buildings and wind turbine connections. You see, complete switchgear simply means, assembly of needed switching devices. Sm6 is an airinsulated ring main unit which is compliance with the standard of gbiec. The extension transforms the rmu tobecome a 4way or a 5way respectively. Serv12630id is a vacuum circuit breaker unit with 12kv rated voltage and 630a rated current, both sides extendible. The ring main unit is an innovative solution that makes it easier to manage the numerous challenges of electrical distribution. Local ringmain units, customer transfer substations and. Outdoor ring main units for secondary distribution.
Xgreen solid insulated ring main unit is a new generation of environmentfriendly product which could be the best option to replace sf6 ring main unit. Ring main unit rmu is a compact, sealed for life metalenclosed switchgear widely used. Presentation switchgear description pe57061 a variety of different panel types are available for each unit within the range, together with a number of optional accessories enabling ringmaster to satisfy the most complex system speci. The rm6 is a compact unit combining all mv functional units to enable connection, supply and protection of transformers on an open ring or radial network. For example, kt denotes a two unit commontank ring main unit made of one load switch unit and one load switchfuse combined unit. Covers to use in a 3 ring binder, slip handbook front cover into front pocket. Rmu of different voltage mostly 12 kv and 24 kv and current ratings are.
It includes in one unit two switches that can connect the load to either or both main conductors, and a fusible switch or circuit breaker and switch that feed a distribution transformer. The ring main units at different substations are connected together to form the ring and contain a switch that connects a transformer or other equipment in the substation to the ring. It is a complete solution to meet the needs of the energy, infrastructure and building industries. Dependent manual dm and independent manual spring ims assisted. Oil circuit breakers have a reputation of reliability and a large portion of all switchgear installed in south africa uses oil as the interruption medium. Ring main unit is of indoor or outdoor type and can be made extensible on both sides. Ring main units up to 24kv, short time current rating up to 21ka,rated for internal arc. This type of switchgear is used for mediumvoltage power distribution, from 7200 volts to about 36000 volts.
A wide variety of 33kv ring main unit options are available to you, such as switch box. A complete switchgear means, assembly of required switching devices, protection device as well as metering device. Download 8 the rm6 is a compact unit combining all mv functional units to enable the connection, supply and protection of transformers on an open ring or radial network. Rm6 gas insulated ring main unit schneider electric. It also includes a protection device and a metering device. Ring main unit is a compact, sealed and enclosed type of switchgear. Ring main unit as an important part of secondary distribution. The ring main unit was introduced in the united kingdom and is now widely used in other countries. Aug 24, 2015 asgeir gjengedal, export sales, medium voltage products in norway explains the features and advantages of the safering air switchgears at cired 2015.
Rmu is called ring main units, we have an option to get power source during an interruption one feeder, but switchgear one of electrically operated load break switch. Gasinsulated compact switchgear type safeplus air 12 kv. Introducing rn2d, the new ring main unit from schneider electric featuring easergy t300. In an electrical power distribution system, a ring main unit rmu is a factory assembled, metal enclosed set of switchgear used at the load connection points of a ring type distribution network. A ring main unit includes a combination of one or more load break switch lbs cum earth switch as incomer and outgoing feeder and vacuum circuit breaker with associated disconnector and earth switch for load feeders. The main busbar and switching compartment has an ip 67 protection degree rating whereas the other sections. Both oil and gas insulated ring main units are the result of extensive innovation, using advanced technologies and are subjected to extensive testing and safety. Abb as, electrification products division gasinsulated ring main. When it comes to switchgear for secondary power distribution in industrial, utility or commercial applications, abbs vast range of gasinsulated and airinsulated technologies, provide flexible and compact solutions to ensure reliability and availability throughout the product lifecycle. These are utilized for medium voltage power distribution. Serv12630id is a vacuum circuit breaker unit with 12kv rated voltage and 630a rated current, both sides.
Sf6gas insulated ring main unit type safering 36 and sf6gas insulated compact switchgear type safeplus 36 36. Safering is a sf6insulated ring main unit for the secondary. In case of an arc fault inside the air tank, followed by an opening of the. Commontank ring main unit is combined freely by individual module units. Sulfur hexafluoride sf 6 is an inorganic, colorless, odorless, nonflammable, nontoxic. It is available in 18 different configurations suitable for most switching applications within the range from 6 to 40. Safering is a sf6 insulated ring main unit for the secondary. Free standing, nonextensible, cable connected ring main unit. The product is unique in terms of number of features and value it offers, making it the ideal choice for various applications in, for example, utility distribution networks, hotels, shopping centers, office buildings, airports, hospitals, tunnels and underground railways. Mv gis compact switchgear safeplus gas insulated switchgear. This gives the advantages of ring main systems as line voltage drops are reduced at the various load substations there is a firm supply i.
Xiria switchgear is a new generation of environmentally friendly ring main unit switchgear for application in 1224 kv medium voltage distribution networks. Sep, 2010 a ring main unit is a piece of switchgear used on highvoltage distribution ring main systems e. Medium voltage ring main units up to 24kv part of set series ring main units up to 24kv, short time current rating up to 21ka,rated for internal arc up to 20ka aflr with options. Ms28 handbook maintenance of electrical switchgear tl4. Ring main units lucy electric secondary switchgear. Ring main unit rmu switchgear latest price, manufacturers. Essentially, its three switches incorporated into one device used to.
Xiria eaton south africa medium voltage switchgear. Saferingsafeplus 1224kv gasinsulated ring main unit safering. Nonextensible ring main unit sf6 gas insulated ring switches with vacuum circuit breaker, clean break technology, unrivalled levels of operator safety with low maintenance requirements lateral and rear cable termination, sf6 gas insulated rmu, fully weather proof with ip54 for outdoor applications. An example of distribution network with ring main units combinations of rmu units by schneider electric in case a circuit breaker is the switching device, it is also equipped with protective relaying, either with a very basic selfpowered type or a more advanced one with communication capabilities the rated voltage and current ranges for rmus typically reach up to 24 kv and 630 a respectively. The extended unit has a separatetank from the main unit. Ring main unit rmu, load break switch and vacuum circuit breaker from unisun electric, a specialist switchgear manufacturer. Manual operation with the help of a slipon operating lever. Pdf en 1224kv saferingsafeplus sf6 insulated ring main unit and compact swtichgear english pdf manual installation manual. Pdf en 1224kv saferingsafeplus gas insulated ring main unit and compact switchgear. Presentation switchgear description pe57061 free standing, nonextensible, cable connected ring main unit. A ring main unit rmu is a totally sealed, gasinsulated compact switchgear unit. Rm6 switchgear proven design delivers several promises. As sustainability becomes more and more important, this criterion has been taken as a starting point for the design in terms of production and for the entire service life of the switchgear. What is a ring main unit in electrical power distribution.
Secormukkt12630 is a three unit commontank ring main unit, made of two load switch units and one load switchfuse combined unit, with 12kv rated voltage and 630a rated current, not extendible. The rm6 is a compact unit combining all mv functional units to enable the connection, supply and protection of transformers on an open ring or radial network. Free standing, extensible cable connected ring main unit transformer mounted, extensible ring main unit, incorporated in a packaged substation. The switchgear and busbars are enclosed in a gastight chamber. Ring main unit rmu is a compact, sealed for life metalenclosed switchgear widely used in urban power distribution network. Switchgear ring main units power transmission equipment of.
Safering safeplus sf 6 insulated ring main unit and compact switchgear installation and operating instructions 6. Environmentallyfriendly ring main unit switchgear for application in 1224 kv medium voltage distribution networks. Difference between ring main unit and switchgear orecco. Ring main unit rmu introduction electrical concepts. Our skills academy offers a range of training courses in the operation and maintenance of both lucy electric and other manufacturers products. Managers and staff responsible for the procurement, supply, maintenance and asset management of the electrical highvoltage hv infrastructure and the operating switching of electrical hv switchgear. The factors that influence the safety of switchgear installations are listed and basic recommendations are made to minimise the dangers on older installations. Lateral and rear cable termination, oil insulated ring main unit.
Although medium voltage oil circuit breakers are no longer manufactured oil filled ring main units are still popular. Ring main units our range of ring main units rmus are all suitable for both indoor and outdoor locations and are designed to operate in the most extreme environmental conditions. Magnefix switchgear is a fully epoxy resin insulated ring main unit for application in 1215 kv distribution networks. Load break switch operating is possible in the front of ring main.
With over 100 years experience in the design and manufacture of switchgear we can provide an exceptionally high level of training. A number of options are available to improve the safety of ageing switchgear these are discussed and evaluated against a total replacement of the switchgear with new equipment. Smart ring is a ring main unit switchgear for power distribution, recently developed by hm power. Transformer mounted, nonextensible ring main unit, incorporated in a packaged substation. The rm6 is a compact unit combining all mv functional units to enable connection, supply and protection of one or two transformers on an open ring or radial network. Modular nonextensible ring switches are an ideal solution for making a switching point in the network. Abb safering installation and operating instructions manual. The primary switching devices can be either switch disconnectors or fused switch disconnectors or circuit breakers. It consists of 2 units of 11 kv, 630 amps, continuously rated, triple pole, non automatic, quick break, air break, fault making load breaking switches, with associated busbars and connections for controlling an incomingoutgoing 11 kv feeder cable. These are typically used at lower voltage substations, such as 11kv. The switchgear is provided in several versions suitable for a wide range of applications within 12 kv. Schneider electric merlin gerin ringmaster 11 kv ring main units types rn2c, re2c and rn6c number. Ring main unit,rmu is a compact, enclosed and sealed type of switchgear used for medium voltage power distribution. Switchgear ring main units power transmission equipment.
Ring main unit, load break switch, vacuum circuit breaker. This document was prepared for use on the railcorp network only. Ring main unit as an important part of secondary distribution substations on photo. The main busbar and switching compartment has an ip 67 protection degree rating whereas the other sections of indoor products are rated at ip 41 and the outdoor products are rated ip 54. Mv gis ring main unit safering gas insulated switchgear. Highvoltage hv 11kv switchgear siemens reyrolle rok and rokss ring main units. The safelink cb is an outdoor rmu ideally suited for rural and urban distribution applications up to,8kv. A ring main unit is a piece of switchgear used on highvoltage distribution ring main systems e. Asgeir gjengedal, export sales, medium voltage products in norway explains the features and advantages of the safering air switchgears at cired 2015. Switchgear type 8djh for secondary distribution systems up to 24. Medium voltage mv sf6insulated ring main unit for secondary distribution up to 40.
Gasinsulated ring main unit safering and compact switchgear safeplus english pdf catalogue catalogue safering safeplus 36kv english pdf catalogue manual. Switchgear for electricity distribution application such as. General data, enclosure and dimensions 1 standard to which switchgear complies iec 2 type of ring main unit metal enclosed,panel type, compact module. Uniswitch product provides our medium voltage customer with the best solution for heavy duty switchgear in a size only a little than a single tank ring main unit while including.