Emerson 7000 Open-Transition 2-position Automatic Transfer Switches, Load Retransfer To Normal

Page 22

4--2 Description of Operation

Open–Transition (2–position) Automatic Transfer Switches continued

Load Retransfer To Normal

NORMAL OK

Load on Emerg

NORMAL OK

TD Emerg>Normal

__min __s

NORMAL OK

TD Engine Cooldown

__min __s

NORMAL OK

Load on Normal

The sequence for load retransfer to the normal source begins automatically when the controller detects a restored normal source or a cancelled transfer test signal.

Normal Source Restoration. The Normal source is considered acceptable again when all six voltage, frequency, or phase rotation conditions occur (see page 3–1).

Cancel Transfer Test. Removal of the test transfer signal can be by the Transfer Control switch (Feature 5), engine–generator exerciser clock (Feature 11C), or via serial port (Feature 72A). When using the Transfer Control switch, it must be released from the Transfer Test position.

The controller begins the load retransfer sequence by starting the Feature 3A time delay. Feature 3A time delay on retransfer to normal allows the normal source to stabilize. If the normal source fails while the Feature 3A time delay is running, the controller waits for the normal source again to become acceptable and restarts the Feature 3A time delay. If the emergency source fails while Feature 3A is running, the controller bypasses the time delay for immediately load retransfer. To bypass Feature 3A time delay, turn the Transfer Control switch to the Retransfer Delay Bypass position.

At the conclusion of the Feature 3A time delay, the controller is ready to transfer the load to normal. If Feature 27 inphase monitor control is enabled, the controller will inhibit transfer until the sources are in phase.

Load Retransfer. To retransfer the load to the normal source the controller de–energizes ER relay and energizes SE relay. The transfer switch TS coil energizes, and all transfer switch contacts (mains, controls, auxiliaries) reverse position. The transfer switch is now supplying the load from the normal source again

Engine Cooldown & Stop. After load retransfer to the normal source, the controller starts Feature 2E time delay. Feature 2E time delay provides an unloaded cooldown running period for the engine–generator. At the end of the time delay, the controller energizes the NR relay and the engine–generator is signalled to shutdown.

Image 22
Contents Description 381333-126 KControl Overview Power Control Center display and keypad Left-Right ArrowsEnter/Save Settings Up-Down ArrowsSettings Overview How to Change a Setting TipNormal Frequency Voltage & Frequency SettingsNormalvoltageunbal Emerg FrequencyNormal Frequency CP SettingsNormal Voltage Normal Voltage UnbalanceTime Delay Settings TD EN Xfer Signal Standard Time DelaysTD NE Xfer Signal Bypass Currently Running TDFeatures Settings Commit to Xfer After TD Normal Fail see Phase Rotation MonitorIn-Phase Monitor Shed LoadGeneral Settings Primary Failure Detection not shownChange Password Default to Factory SettingsReset Engine Exerc Programs Menu Language not shownPresent DATE/TIME Engine Exerciser SettingsJAN P1 Engine ExerciserPresent Date/Time Engine Exerciser Settings MenusP1-7 Engine Exercisers Event Types View Event LogLogged Events Event ReasonsATS Statistics Service Statistics / DiagnosticsView Service Data Source StatisticsService Factory Selectable Features ATS Status Status InformationSource Acceptability Normal Source StatusDisplay Messages and their Meaning Wrong Password Test Mode Serial CommTest Mode Test Circuit XTD Parallel AlarmOpen-Transition 2-position Automatic Transfer 4ATS,7ATS,7ATB Load Transfer To EmergencyOpen-Transition 2-position Automatic Transfer Switches Load Retransfer To NormalClosed-Transition Automatic Transfer 4ACTS, 7ACTS, 7ACTB Closed-Transition Automatic Transfer Switches Closed-Transition Load Retransfer To Normal Bypass Closed-Transition Load TransferDelayed-Transition Automatic Transfer 4ADTS, 7ADTS, 7ADTB Delayed-Transition Automatic Transfer Switches Controller Cover Removal Figure A-1. Cover release latchesTransfer Switch Type DIP Switch ActuatorsNominal Source Voltage Selection Frequency of Sources Phases of Normal & Emergency SourcesLost or Forgotten Password Data Input LockVoltage Jumper Blocks Figure A-3. Location of jumper blocksIndex
Related manuals
Manual 172 pages 36.16 Kb Manual 12 pages 23.06 Kb Manual 28 pages 10.34 Kb Manual 9 pages 27.84 Kb

4000, 7000 specifications

The Emerson 7000 series is a versatile and advanced automation solution designed for modern industrial environments. Renowned for its reliability, scalability, and performance, the Emerson 7000 series is tailored to meet the complex demands of various industries, including oil and gas, chemical manufacturing, power generation, and food and beverage.

At the heart of the Emerson 7000 series is its powerful and flexible architecture. This series integrates seamlessly with existing systems, allowing for easy upgrades without disrupting ongoing processes. The modular design enables users to customize their setups according to their specific needs, providing unmatched adaptability in dynamic operations.

One of the standout features of the Emerson 7000 is its intelligent diagnostics capabilities. This technology leverages advanced algorithms and machine learning to predict equipment failures and maintenance needs, thus minimizing unplanned downtime. By continuously monitoring critical parameters, the system provides operators with actionable insights, enhancing operational efficiency and safety.

The Emerson 7000 series also focuses on user-friendly interfaces. Its intuitive design allows operators to quickly navigate complex data and analytics, facilitating quicker decision-making. The human-machine interface (HMI) provides a clear visual representation of processes, empowering users to manage operations effectively.

Another cutting-edge technology in the Emerson 7000 series is its cybersecurity measures. With the increasing threat of cyber-attacks in industrial environments, Emerson has prioritized the integration of robust security protocols. These features protect sensitive data and ensure the integrity of operations, safeguarding organizations from potential breaches.

Additionally, the Emerson 7000 series supports a wide range of communication protocols, making it compatible with various devices and systems. This interoperability allows for greater collaboration between different technologies within a facility, streamlining workflows and enhancing productivity.

Lastly, the Emerson 7000 emphasizes sustainability and energy efficiency. By providing insights into energy consumption and operational performance, the system helps organizations minimize their environmental impact and reduce operational costs.

In summary, the Emerson 7000 series stands out as a comprehensive automation solution that combines cutting-edge technologies, user-friendly interfaces, robust cybersecurity, and a commitment to sustainability. With its ability to adapt to diverse industrial needs and enhance operational efficiency, the Emerson 7000 continues to be a preferred choice for businesses seeking to navigate the complexities of modern manufacturing and process automation.