SUE 3000High Speed Transfer Device Product Description

　　Voltage decreases or complete supply interruptions represent the most important and critical problems for the quality of energy supply today. It is especially true that voltage distur bances with electronic control systems and other sensitive installations can lead to complete loss of production and long stoppage time.

　　The SUE 3000 High Speed Transfer Device guarantees an op timum safeguarding of energy supply. The device ensures the continued supply to the consumer through automatic transfer ring to a stand-by feeder and protects the subsidiary process from expensive stoppage time. Furthermore, through the pos sibility of manually-initiated transfers – for targeted clearings, for example – the operation of the installation is considerably simplified.

　　As a long-established supplier of High Speed Transfer Devices, with more than 2100 systems and devices already supplied world-wide, ABB can rely on a unique know-how in this area of specialization.

　　The SUE 3000 High Speed Transfer Device can be imple mented everywhere where a disturbance of the electrical supply would lead to a breakdown in production, which would lead as a result to costs.

　　Possible areas of utilization include, for example:

　　Auxiliary installations serving power stations, as for example

　　- Steam power stations

　　- Gas turbine power stations

　　- Combined cycle power stations

　　- Nuclear power stations

　　Environmental technology installations

　　- Flue gas purification

　　- Refuse incineration installations

　　Voltage supply to

　　continuous industrial processes

　　- Chemical plants

　　- Industrial facilities with high degrees of automation

　　- Fiber manufacturing

　　- Petrochemical processes

　　In order to realize a permanent availability, the load is supplied from at least two synchronized feeders which are independent from one another and which are equipped with High Speed Transfer Devices. When switching in the grid is influencing the typically indepen dent synchronous supply voltages an additional supporting function (see chapter 5.5) may properly execute the transfer. In doing so, the High Speed Transfer Device has the task of ensu ring uninterrupted continuous operation of the connected devices in case of a power supply breakdown, taking into account diffe rent physical factors, through the most rapid possible transfer to a different feeder kept stand-by.

　　Corresponding to its multifaceted areas of application, the SUE 3000 is set up for different switchgear arrangements:

　　Switchgear configuration with two circuit-breakers

　　This arrangement is often used in auxiliary installations serv ing thermal power stations. One of the two power supplies normally feeds the busbar. One of the two is switched on, the other is switched off. A coupled operation of both power supplies is not intended, and due to reasons of rating (short circuit withstand), it is often also not permissible.

　　If an error leads to a disturbance of the feeder currently in operation, the transfer device switches the load over to the second feeder in the shortest possible time. Following suc cessful transfer, the busbar is then supplied further by the second feeder. Once the main feeder is again in operation, a manually initiated transfer back can take place and the normal status can be restored once again. The High Speed Transfer Device SUE 3000 is designed completely symmetrical, so that a protection-initiated transfer can be executed from either of the feeders, in case for example two feeders with equal status are present.

　　Switchgear configuration with two incoming feeders and one busbar sectionalizer (Variant 2)

　　With this configuration, the load is divided between two busbar sections due to reasons of redundancy. The coupling circuit breaker usually remains open. Both feeders are in operation.

　　In case of a disturbance of one feeder a transfer from the circuit-breaker of the disturbed feeder to the coupling circuit breaker follows: The previously feeding circuit breaker is ope ned and the bus coupler is closed.

　　After that, both busbar sections are supplied by one feeder. Once the disturbed feeder is again available, a manually initiated transfer back can be executed in order to restore normal status once again.

　　Switchgear configuration with three incoming feeders and selection function (Two out of three) (Variant 3)

　　This configuration is utilized, if more than two incomers feeding a busbar and a two out of three selection is required.

　　Transfer will take place only between the two pre-selected feeders.

　　All necessary input signals (e.g. control circuits, position indi cation, feeder voltages) are connected to the SUE 3000 trans fer controller in a fixed way. So this solution reaches the same reliability as two or three-breaker solution. The pre-selection logic can be combined with additional logical conditions in order to provide semi-automated or fully-automated selection of the transfer direction.

　　Switchgear configuration with two incoming feeders and one busbar sectionalizer (Variant 4)

　　Variant 4 is a further development of Variant 2. In this configu ration, the load can also be split between two busbar sections for reasons of redundancy. If the sectionalizer circuit-breaker is open, infeed is via the two incoming feeder panels. On disturbance to one incoming feeder, switchover from the circuit-breaker in the faulty feeder panel to the sectionalizer breaker takes place: The previously closed circuit-breaker in the faulty incoming feeder is opened, and the busbar sectio nalizer closed. Then, both busbar sections are supplied by one incoming feeder. When the faulty feeder is once again available, manual switchback can be initiated to restore the normal operating condition. If only one incoming feeder is to supply the complete busbar, the busbar sectionalizer must be closed. Variant 4 (see figure 1-2) performs a transfer switching operation between the two incoming feeders when a fault occurs in the feeder with closed breaker. The busbar is then supplied by the other incoming feeder. When the faulty feeder is once again available, switchback can be initiated to restore the desired normal operation.

PG 609 SUE 3000 gb_2016.pdf

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