Local Control Unit for Generator

Main characteristic: (1) Take PLC, the brands of OMRON and Mitsubishi, for the core, supplemented by OMRON drive relay, to combine automation control system, which rapidly deals with accident and fault, reliable action, well immunity, simple design and easy maintain. (2) Touching screen instead of button, which is easy operated and beautiful and graceful. (3) According to the different configuration of generator, it can modify PLC control program on-line to cater for the requirement of regular running for generator system, which enhance flexibility and applicability of the system. (4) One generator correspond with one LCU system (generator automation panel), which enhance the reliable of real-time monitoring and protection. Realize remote monitoring and operation of generator power system running by connecting with the RTU and Remote Dispatching at the same time. Thus combine the integrated automation network with control, protection, measure and disposal integration. (5) EEPROM Program Memory in PLC has the function of holding itself when losing power. And the running program can be store forever.Control function: (1) Automatically start the generator start/stop procedure (2) Manual and automation control of accident stop and emergency stop. (3) Manual and automation control the vane-opening increase/decrease,rotate speed (active power) adjustment, excitation (reactive power) fluctuate (4) Manual and automation switch operation method between generate to phase-modulated and phase-modulated to generate power. (5) Automation control of actiyator oil pump (6) Manual and automation control of main valve (butterfly valve, ball valves, and so on) and sluice gate. (7) Automation control of generator auxiliaries device and factory common equipment (oil pressure device, air compression device, technical water supply system, Water-Colleting Drainage System and so onProtection function *Protection of generator's accident stop: (1) High temperature of axletree (2) Low speed to power system auto-separation (3) Electric accident (4) Accident of low oil pressure (5) Interruption of backup cooling water (6) Generator over-speed*Protection of generator's fault signal: (1) Elevatory temperature of axletree (2) Interruption of cooling water (3) Elevatory temperature of air-cooler (4) Abnormity pressure and position of oil (5) Unfinished generator start/stop (6) High water level of hydraulic-turbo generator coping (7) Backup lubricating water devotion (8) Abnormity water level of Water-Colleting (9) Shear pin Fracture (10) PLC fault Notes: Above control and function protection are typical sample application of common generator set. Different set depends on specific status.Monitor function (1) Generator sets have active power, reactive power, power factor, generator frequency, voltage and current. (2) Indication of boot-strap (3) Indication of act location of actuator. (4) Display corresponding signal of accident and fault event (5) Communication to remote monitorMain technique parameter (1) Size of panel: 2260×800 ×600 (length ×width× thickness ) (2) Structure of panel: great glass door GGD (3) Color of screen: doe,plastic-spraying (standard color) (4) PLC voltage and current: 160-264V AC 50/60Hz (5) Permit time of the system instant break: have no effect on action if instant break is less than 10ms (6) Effect time of PLC: about 10ms (7) PLC loop-insulation Input:optical coupling insulation Output: relay isolation (8) Electric contact life of PLC output relay: Load capability Electric contact life 35VA 3,000,000 times 90VA 1,000,000 times 120VA 20,000 times (9) Operation temperature: -5 45 (National standard) (10) Operation humidity: 35% 90% (No condensation)