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41 параллельная система ИБП
параллельная система ИБП
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[Интент]Parallel Operation: The system shall have the option to install up to four (4) UPSs in parallel configuration for redundancy or capacity.
1. The parallel UPS system shall be of the same design, voltage, and frequency. UPS modules of different size ratings shall be permitted to be paralleled together for purposes of increased capacity or UPS module redundancy. The UPSs in the parallel configuration shall not be required to have the same load capacity rating.
2. Parallel Capacity: With N+0 system-level redundancy, up to 2MW of load can be supported by the system.
3. Parallel Redundancy: With N+1 system-level redundancy, up to 1.5MW of load can be supported by the system, and only the UPS being replaced must be isolated from the source (bypass operation is not required for the entire system during the UPS replacement procedure).
4. Output control: A load sharing circuit shall be incorporated into the parallel control circuits to ensure that under no-load conditions, no circulating current exists between modules. This feature also allows each UPS to share equal amounts of the total critical load bus. The output voltage, output frequency, output phase angle, and output impedance of each module shall operate in uniformity to ensure correct load sharing. This control function shall not require any additional footprint and shall be an integral function of each UPS. The static bypass switches shall be connected in parallel.
5. Parallel System Controls: To avoid single points of failure, the UPS system shall have no single dedicated control system designed to control the operation of the parallel UPS system. Control of and direction of parallel UPSs shall take place via a master/slave relationship, where the first UPS to receive logic power asserts itself as a master. In the event of a master failure, a slave UPS shall take the role of master and assume the responsibility of the previous master UPS. Regardless of which UPS is master or slave, user changes to the system status, such as request for bypass, can be done from any UPS connected to the bus and all UPS on the bus shall transfer in simultaneously.
6. Communication: Communication between modules shall be connected so that the removal of any single cable shall not jeopardize the integrity of the parallel communication system. Load sharing communications shall be galvanically isolated for purposes of fault tolerance between UPS modules. A UPS module's influence over load sharing shall be inhibited in any mode where the UPS inverter is not supporting its output bus. Transfers to and from bypass can be initiated from any online UPS in the system.
7. Display: Each UPS multi-color LCD touch screen user interface shall be capable of using an active touch screen mimic bus to show the quantity of UPS(s) connected to the critical bus, as well as the general status of each UPS, such as circuit breaker status information. Any touchscreen display shall support the configuration of the [entire parallel] system and shall provide event and alarm data for all UPSs in the parallel configuration. A Virtual Display Application shall be available for download to the customer’s computer and shalll support remote monitoring of a complete system with up to 4 UPSs in parallel.
8. Battery runtime: Each UPS must have its own battery solution. The battery solution for the entire system can be a combination of standard and third-party batteries, but each UPS must use only one battery solution – either standard or third-party batteries.
9. Switchgear: A custom switchgear option shall be required for parallel operation.
[Schneider Electric]Тематики
EN
Русско-английский словарь нормативно-технической терминологии > параллельная система ИБП
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42 резервирование с развязкой источников электропитания
резервирование с развязкой источников электропитания
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Рис. ABB
True redundancy using a CP-A RUFor true redundancy it is necessary to provide decoupling of the individual power supplies.
Otherwise, the failed power supply could possibly act as a load for the other power supply or, in the worst case, cause a short circuit on the secondary side resulting in a failure of the second power supply.
Decoupling of the power supplies has to be performed by connecting decoupling diodes (so called O-ring diodes) to the secondary outputs. These diodes prevent mutual loading of the power supplies in case of a fault and thus guarantee continuous supply.
For the setup of redundant power supply systems, ABB offers two redundancy units, the CP-RUD (for output currents of up to 5 A) and the CP-A RU (for output currents of up to 40 A). The inputs of these units are connected to the terminals L+ and L- of the power supplies (many other manufacturers often consider L+ only). The loads are supplied directly from the outputs of the redundancy unit.
[ABB]Тематики
EN
Русско-английский словарь нормативно-технической терминологии > резервирование с развязкой источников электропитания
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43 канал связи
1. transmission link2. communication linkсредство информации; средство связи — communication medium
3. communications link4. data channel5. information bearer channel6. information channelканал прямой связи; прямой канал — forward channel
7. channel8. circuit9. communication bus10. communication channel11. link12. trunk13. liaison channelканал связи; информационный канал — communication channel
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44 линия связи
1. transmission link2. communication link3. communications link4. circuit5. communication lineсредство информации; средство связи — communication medium
6. link7. communications links8. flowline -
45 цепь контроля
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46 цепь проверки
1. check circuit2. checking circuit -
47 блок кольцевой магистрали
блок кольцевой магистрали
БКМ
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[Интент]EN
ring main unit in electrical power distribution
A standard piece of switchgear in distribution systems comprising of switches for switching power cable rings and of switches in series with fuses for the protection of distrbution transformers. RMU: Ring Main Unit. RMU used for H.T.side. RMU is having 3no.s of switches(Circuit Breakers or Isolators or LBS), it is used for two inputs with mechanical or electrical interlock and one outgoing to the load. Either one input with two outgoings. RMU used for redundancy feeder's purpose.
Ring main unit is used in a secondary distribution system. It is basically used for an uninterrupted power supply. Alongside, it also protects your secondary side transformer from the occasional transient currents. Depending on your applications and loading conditons you can use a swicth fuse combination or a circuit breaker to protect the transformer. This transformer connected to the switch fuse/ circuit breaker is called your T off. In a common arrangement you have Load break swicthes on both the sides of your T off. Ring main Units come in standard ratings of 11/22/33 kV, 630/1250 A, 21 KA/3 secs.
[ http://wiki.answers.com/Q/What_is_a_ring_main_unit_in_electrical_power_distribution]Тематики
EN
Русско-английский словарь нормативно-технической терминологии > блок кольцевой магистрали
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48 выключатель резервного контура насоса
General subject: pump redundancy circuit switchУниверсальный русско-английский словарь > выключатель резервного контура насоса
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49 подключение резервного контура насоса
General subject: pump redundancy circuit switchУниверсальный русско-английский словарь > подключение резервного контура насоса
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50 резервный канал
1) Military: alternate route, alternative route2) Telecommunications: cached circuit, redundant channel, standby channel3) Information technology: spare channel4) Mechanics: redundancy channel5) Network technologies: dial back-up6) EBRD: standby facility (для продажи нового выпуска ценных бумаг), standby option (для продажи нового выпуска ценных бумаг)7) Automation: redundant channel (управления)8) Security: emergency channel, guard channel
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