OPERATION, MAINTENANCE AND REPAIR OF AUXILIARY GENERATORS Episode 12 pptx

... part often will lead to a series of diffi- culties originating from by-products or effects of the initial failure. Therefore, carefully check all of the related and resultant functions of the ... gaskets, and any other gaskets that have been disturbed during the tune-up. _- G-4. Engine failure and repairs. a. Failure identification. A well planned and ex- ecuted preventive...

Ngày tải lên: 12/08/2014, 16:21

... of sizes. Smaller engines, which operate in the high-speed range (120 0 and 1800 rpm), are used for portable units because of their lighter weight and lower cost. Low- and medium-speed (200 and ... supplied, their demand, consumption, voltage, phase, and frequency requirements. Also to be considered are load trend, expected life of the project and of the equipment, fuel...

Ngày tải lên: 12/08/2014, 16:21

... at lower part of duct is open and free of any obstruction so that moisture (rain or condensation) can run off. Check inlet temperature sensor for signs of damage. Clean sensor and surrounding area ... MO- 912 b. It is suggested that the manufacturer of the auxiliary power unit be consulted to determine the time intervals in which the auxiliary power unit should be exercised...

Ngày tải lên: 12/08/2014, 16:21

... Proper installation and maintenance of oil filters and mechanical operation of the engine are equally important for treatment of oil. Preven- tion of contamination and removal of contaminants should ... of governors controlling AC generators affects the fre- quency and the load division between generators but has almost no effect upon voltage. f. Direct C urrent (DC)...

Ngày tải lên: 12/08/2014, 16:21

... smoothness and absence of scratches and nicks. (d) Camshaft cams and cam faces for worn or deformed condition; journal surfaces and bearings for highly polished condition and absence of scratches, ... condition and absence of scratches, nicks, cracks, and deformation. (f) Pistons for cracks and warped condition; verify pistons, rings, and pins comply with manu- factur...

Ngày tải lên: 12/08/2014, 16:21

... strength of the mag- netic field, the number of coils (and number of wind- ings of each coil), and the speed at which the rotor turns. b. Current. Current is the rate of transfer (flow) of electricity, ... frequency of the output voltage are synchronous generators. Synchronous generators are usually called alternators. 4-5. Alternator types. 4-3. Types of generators....

Ngày tải lên: 12/08/2014, 16:21

... are usually rated at about 135 per- cent of rated voltage and a rate buildup of about 125 volts per second. Working range is between 75 and 125 percent of rated exciter voltage. b. Current. An ... level of fault current. Most units function as overcurrent trip devices and con- sist of a solenoid tripper and solid-state compo- nents. The solid-state components are part of...

Ngày tải lên: 12/08/2014, 16:21

... barriers; clean off smoke and dust. Repair moderate damage to bushing insulation by sanding smooth and refinishing with a clear insulating var- nish. Inspect alignment and condition of movable and stationary ... (approxi- mately a 30 percent drop and delay of about two seconds) to start the auxiliary generator. (b) When voltage and frequency of the auxil- iary generator...

Ngày tải lên: 12/08/2014, 16:21

... spectrometric analysis of the metal par- ticles. It is necessary to collect and evaluate data for type and quantity of engine wear-metals. Study of this data shows trends of engine wear and expected future ... continuously operating engines and generators. F-2. DD Form 2744 (Emergency /Auxiliary Generator Operation log). Use DD Form 2744 for inspection testing of emergenc...

Ngày tải lên: 12/08/2014, 16:21

... TM 5-685/NAVFAC MO- 912 - c The proponent agency of this publication is the Office of the Chief of Engineers, United States Army. Users are invited to send comments and suggested improvements ... Publications and Blank Forms) directly to Director, U.S. Army Center for Public Works, ATTN: CECPW-EE, 7701 Telegraph Rd., Alexandria, VA 2231593862. By Order of the Secretaries of...

Ngày tải lên: 12/08/2014, 16:21