EP 1130-2-510
13 Dec 96
the detection devices located that set off a failure alarm. Know the intrusion systems and the
locations of detection devices that set off alarms and the actions to be taken when an alarm is
actuated.
(11) Supervisory Controls. Must be familiar with the Supervisory Control and Data
Acquisition (SCADA) system, communication links, modems, printers, storage devices,
synchronous and asynchoronous controllers, microprocessors and microcomputers, software and
hardware, assembler and compiler, RAM and ROM; and all event recording systems which are
essential for production and control of electric power and flood control.
(12) Testing and Trouble Shooting. Be able to trace trouble points with the help of test
equipment and prepare reports, as needed on the faulty equipment.
(13) Maintenance and Repair of Electronic Equipment. Be able to maintains in good
working condition all shop and field electronic equipment by timely repair, test and calibration.
Maintain maintenance records for individual equipment.
H-3. MECHANIC.
a. KNOWLEDGE
(1) Mechanical Equipment. Know working principles and components of all mechanical
machinery and equipment in the powerhouse. It includes hydraulic turbines, governors, cooling
systems, air compressors, pumps - water, lubricating; heating, ventilating and air conditioning
(HVAC) systems; flood gates, cranes and hoists, machinery in machine shop, acetylene and
electric welding equipment.
(2) Electrical Equipment. Know basic principles of electrical machinery, generator - rotor
& stator, pilot & main exciters, transformers, circuit breakers, disconnects, and annunciation
systems.
b. SKILLS
(1) Hydraulic Turbines. Know and recognize all components of turbines installed in the
powerhouse, types of lubricants and the method to lubricate various components such as wicket
gates, arms and operating ring. Be able to disassemble, repair, and assemble packing glands.
generator thrust bearing, their maximum safe operating temperature, cooling systems, and
corrective actions if the temperature exceeds those limits. Understand oil flow systems e.g., high
lift systems for thrust bearing.
(2) Governors. Know all components of the governor and how they influence operation
of the turbine. Know the construction and operation of the generator overspeed mechanism, ratio
of speed between flyballs and main shaft, control mechanism of main valve and pilot valve, and
opening and closing of wicket gates. Be familiar with the pressure range of the governor, gate
limit device, shutdown solenoid, governor oil pumps and method of priming them, speed droop
mechanism, function of the compensating mechanism, main relay valve, float operated valve in the
governor oil pressure tank, and corrective action to restore a unit to service following a low oil
pressure shutdown.
H-4
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