ABB Rem 54 53 Maskinterminaler

ABB REM _ Maskinerminaler Applikation:

REM 54_ roterande maskinterminaler (kallas "maskinterminaler" är vidare utformade för att användas som huvudskyddssystemet för generator- och generator-transformerenheter i små och medelstora diesel, hydroelektriska och ångkraftverk osv. E . g ., i pumpar, kvarnar och krossar under start och normalt körning bildar ett annat applikationsområde .

The functionality available for the machine terminals depends on the selected functionality level (refer to section "Ordering Information" on page 91) and is also tied to the hardware configuration. The desired functions can be activated from a wide range of protection, control, measurement, condition monitoring, general, and communication functions within the scope of I/O connections, considering the total CPU load. Compared to the traditional use Av separata produkter tillhandahåller kombinationen av önskade funktioner kostnadseffektiva lösningar och gör det enkelt att anpassa sig till olika typer av applikationer ({561131-3 standard), tillåter maskinterminalerna till olika typer av applikationer .}}}}}}}}

By means of the graphic HMI display, the control functions in the machine terminal indicate the status of disconnectors or circuit breakers locally. Further, the machine terminal allows status information from the circuit breakers and the disconnectors to be transmitted to the remote control system. Controllable objects, such as CBs, can be opened and closed over the remote control system. Status information and Kontrollsignaler överförs över den seriella bussen . Lokal kontroll är också möjlig via tryckknappen på frontpanelen på maskinterminalen .

The protection functions of the machine terminals are designed for selective short-circuit and earth-fault protection of rotating machines. Further, unlike most other power system components, rotating machines also need protection against abnormal operating conditions such as overcurrent, unbalanced load, overtemperature, over- and undervoltage, over- and underexcitation, over- and underfrequency, and generator Motorering . Dessutom tillhandahålls underimpedansfunktionen för linje säkerhetskopiering . Dessutom tillhandahålls stallskydd och en kumulativ starträknare för motorskydd och startövervakning .}

The machine terminals measure phase currents, phase-to-phase or phase-to-earth voltages, neutral current, residual voltage, frequency, and power factors. Active and reactive power are calculated from measured currents and voltages. Energy can be calculated on the basis of the measured power. The measured values ​​can be indicated locally and remotely as scaled primary värden .

In addition to protection, measurement, control, condition monitoring, and general functions, the machine terminals are provided with a large number of PLC functions, allowing several automation and sequence logic functions needed for substation automation to be integrated into one unit. The data communication properties include SPA bus, Modbus, or LONbus communication with higher-level equipment. Further, LON communication, together with PLC functions, Minimerar behovet av hårddisk mellan maskinterminalerna .