The static transfer switch is suitable for indoor use only. Kohler decisionmaker power systems automatic transfer switches how does an automatic transfer switch work. Its now widely acknowledged at international level that the static transfer switch sts plays a crucial role in guaranteeing maximum electrical power reliability in environments that are. Low voltage switches switches changeover and transfer. This sts automatically transfers critical loads from a primary power source to an alternate power source in the. A static transfer switch sts is designed to transfer power supply between independent ac power sources, thus protecting the connected load from power. Beware of transformer and static transfer switch location. Static transfer switch power paragon stsi product description the stsi is one in a family of l3 power paragons high speed digital static transfer switches series stsi. The static transfer switch is running on the alternate power source. What is the difference between static transfer switch and an automatic transfer switch. This sts automatically transfers critical loads from a primary power source to an alternate power source in the event of interruption or abnormal conditions. A hidden reliability threat in ups static bypass switches. Static transfer switches power systems international.
Provide input overcurrent protection in accordance with the unit ratings. Each page of the tender document to be signed with seal by the authorized person. The use of sts within an electrical distribution system provides a means of secure protection. Static transfer switches for source redundancy ge series sts 3 three phase. Abb offers a complete range of startup services, repair services, preventive maintenance plans and service contracts. By continually monitoring power quality, the wavestar switch automatically transfers to an alternate source within a quarter cycle and without interruption of power to even your most sensitive critical loads. Eaton static transfer switch sts endoflife announcement. Cyberex superswitch4 digital static transfer switch 9410002850 d0 en 3 contacting abb for support to contact abb for information or repair service in the united states, call 1 800 292 3739. The pdi static transfer switch supplies critical loads with a choice between two available sources of electrical power. The static transfer switch sts is a device that enables the transfer of one or more critical electrical loads from a single phase power supply source source 1 to a second single phase power supply source source 2 and vice versa. They provide a nomess and nostress function, granting you fast and safe access to power from your generator when you need it most. The transfer takes place without any interruption of power to the load and may be automatic or manually.
Ups, static transfer systems sts, energy storage systems and rectifiers comprise the most complete ranges in the world and cover a very wide variety of applications for every sector of activity. The sst 3phases 3poles static transfer switch con sists of a set of three 1phase switches. In case of an interruption in the source that feed the critical load, critical load is transferred to the other source within less than 5 ms. When power from the generator or the backup utility feed is stable and within prescribed voltage and frequency tolerances, the transfer switch shifts the electrical load to the emergency power source. The lti static transfer switch will provide virtually uninterruptible power to any critical load by automatically or manually selecting between one of two ac input sources. For synchronizationcontrolled transfers, the static transfer switch transfers the critical load between sources without interruption. General requirements for automatic static transfer switch. Static transfer switches sts are such electrical devices which are used for very fast switching between electrical power sources. Static transfer switches 8 take an indepth look at the major components, parameters, installation locations, maintenance and testing a static transfer switch sts is critical to any redundant power system supplying data center loads. The system returns the load to the preferred source either automatically or manually. If the preferred source deviates outside of preset limits, the unit will instantaneously transfer to the secondary source. The 16 to 125 ampere sizes can be snappedon to a din rail and the front fits in the 45 mm consumer unit cutout.
Abb offers a complete range of startup services, repair services. Cyberex mission critical mc series cyberex mission critical mc series 200800a digital static transfer switch and pdu integration. Transfer switches are used in power electronics to provide. The unit may be operated at elevated temperatures if the loading is reduced. Using our standard product models as a base, we engineer unique customisations so that complete integrationcompatibilitycan be achieved.
The twinsource rack mount static transfer switch is considered best in class among rack mounted automatic transfer switch products. Static transfer switch and static transfer switch control. Abb offers a wide selection of automatic transfer switches ats, from 160 to 1600 amperes in range. The unit is designed to operate from solidly grounded ac power sources only. Threephase sts 300 centralized static transfer switches. How to use a diode as a switch diodes as switches basics of diode switches.
Internal mechanical bypasses enable correct servicing. A hidden reliability threat in ups static bypass switches schneider electric data center science center white paper 96 rev 1 2 a static switch is an electronic switch that is usually built using silicon controlled rectifiers or. This superior switching time means that if one power source fails the sts switches to the backup power source so quickly that the load never recognizes the transfer made. Static transfer switch pdi power distribution, inc. In the event of a power loss, switching to an alternate source of power without dropping the load is vital. Reliable functionality you can rest assured that your automatic transfer switch solution works as expected without the need to carry out any testing. Static transfer switches automatic static transfer switches sts, enable automatic or manual transfer between two ac power supply sources, ensuring a transfer time of less than 14 of a cycle. Transfer switches are an effective means of ensuring your business has uninterrupted access to electrical power in the face of outages and incidents. For both switches, load capacity of neutral line is rated to 200% of phase line load capacity. Endoflife notification for eaton type ii static transfer switch sts effective february 28, 2019, eaton is announcing endoflife eol status for the eaton sts eatons type ii digital static transfer switches have been in the. Static transfer systems sts static transfer systems sts are intelligent switches providing increased supply availability, automatically transferring loads to alternative power sources when the primary power source fails or is not available. The static transfer switch system should be mounted in a location where only nonconductive pollution may occur. The required wcr level for a given application is driven.
What is the difference between static transfer switch and. General this manual covers user operation and installation of the wavestar static transfer switch sts or stspdu systems from 150 amperes to 1600 amperes. Static transfer switch 2 switch pdf manual download. Sts 300 is ideal for networks, servers and data centers. Protection and connection motorized and automatic transfer. They have the features and functionality that makes them suitable for diverse applications.
For full power capability, the temperature must be within the operating environment specifications. The time period is determined by the time it takes for an upstream protective device to interrupt the current. The static transfer switch is a critical component within a data center or other critical environment. General requirements for automatic static transfer switch a instructions 1. Check the event log to determine the reason for the transfer from the preferred source. For safety reasons as well as to ensure optimal performance of your wavestar tfa static transfer switch, please carefully read the instructions before trying to. Scr as a switch lecture series on power electronics. Static power is a privately owned australian company, based in melbourne where we design, manufacture, test and maintain our ists brand of static transfer switches. Because there are no mechanical moving parts, the transfer can be completed rapidly, perhaps within a. They perform instantaneous switching operations and thus supply immediate power to the load.
Tfa static transfer switch power distribution, inc. Party to furnish the detailed technical literature brochure regarding their product and to highlight the special features optional items of the product. Static transfer switch sts a static transfer switch uses power semiconductors such as siliconcontrolled rectifiers scrs to transfer a load between two sources. Our product range has grown to include unique rack mount, wall mount and freestanding models. Liebert static transfer switch 2 installation, operation. The sstn 3phases 4poles switch has an additional neutral line switch. Forty years ago, cyberex revolutionized power distribution with its invention of the static transfer switch. Our power transfer switches deliver ultrafast and reliable switching between redundant ups units and between the ups system and backup power source. Protect unit from excessive moisture and install in an area free from flammable liquids, gases, or corrosive substances. The static transfer switch sts is an electrical device that allows instantaneous transfer of power sources to the load. Since then, cyberex has installed more units than any other manufacturer. These systems can also be the achilles heel of the electrical distribution system if not operating properly and can represent a single point of failure in the system. Static transfer switch mv sts mv sts significantly improves the uptime of facilities with dual feeder service by subcycle switching from one power source to another whether a power outage or a voltage sag event presents itself at one of the dual feeders to a facility, downtime of unprotected loads is inevitable.
It has a proven track record of over 60,000,000 hours online without a load failure among its installed base worldwide. Automatic transfer switches automatic transfer switch family product description eaton s cutlerhammer automatic transfer switches are reliable, rugged, versatile and compact assemblies for transferring essential loads and electrical distribution systems from one power source to another. Static power was started in 2002 with a team of dedicated, experienced engineers and professionals previously involved with the ups industry. Borri threephase sts 300 centralized static transfer switches from 100 to 3000 a. The wavestar tfa static transfer switch is the only true front access static switch which enables installation, maintenance, service and ir scanning from the front of the enclosure.
The manual also covers stspdu systems up to 300kva. Another event has caused the system to transfer to the alternate source. Pdf its now widely acknowledged at international level that the static transfer switch sts plays a crucial role in guaranteeing maximum electrical. Every transfer switch needs a controller to ensure transfer of power from utility to generator. Static transfer switches sts are designed to transfer supply between independent onephase or threephase. The uniblock is the most reliable high power ups in the world and has been built since 1982 using static switch technology. Liebert static transfer switch user manual pdf download. Automatic transfer switch 125 a to 3200 a switch to innovation.
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