EP 1130-2-510
13 Dec 96
(5) Circuit Breakers. Be familiar with air and oil circuit breakers, the operating
mechanism including arc extinction, D-C control circuits, breaker timer, and ratings.
(6) Protective Relays. Know different types of relays in the power plant, purpose of these
relays and their operating and control mechanism, and resetting procedures.
(7) Disconnect Switches. Know operation of manual and motor operated disconnect
(MOD) switches. Know the control circuit and key interlocks for MOD switches.
(8) Electrical Measuring Instruments. Must know all electrical measuring and test
instruments, what they measure and when and where they are used.
(9) Turbine Governor. Be familiar with the operation of the turbine governor, understand
the purpose of the speed sensing device of the governor to include maintenance and repair, and
the speed setting of the governor. Be able to adjust limit switches, speed switches, and speed
adjust motors.
(10) Air Conditioning, Heating, and ventilating Equipment. Know the working of main
air handling unit and temperature control mechanism.
(11) Repair and Maintenance. Must know and recognize components of all electrical
equipment in the powerhouse, be able to carry out inspections of all electrical equipment,
disassemble and assemble them, repair, test, maintain, and where needed sent them for shop
repairs outside the powerhouse. Be able to install rigid conduit, and pull wire and cable as
necessary. Be able to record appropriate test data for comparison with future inspections and be
able to calculate the rate of deterioration of equipment particularly insulation. Should be able to
accomplish tripping tests during periodic inspections and routine maintenance. Be able to
maintain and repair all annunciation systems.
(12) Safety and Clearances. Be able to work on all high/low voltage equipment without
any harm to self or to others. Understand clearance purpose and procedure, recognize all
protective cards, their purpose and use. Be able to clear out all electrical equipment and return
them to service.
H-2. ELECTRONICS MECHANIC.
a. KNOWLEDGE
(1) Electronics and Electricity. Must know principles of electronics and electricity -
resistors, capacitors, inductors, diodes, transistors, frequency bands, frequency resonance (parallel
and series), rectification/inverting, voltage divider, gates, power supplies and charges, oscillator
circuit, modulation, microwave transmitters and receivers, microwave channels, public address
system, cables (Audio, Fiber Optic, Telephone etc.), basic television systems, radios (AM, FM &
SSB), alarm systems (intrusion and system failure), microprocessors and microcomputers;
multimeters/meters; relays and oscilloscopes.
(2) Miscellaneous. Be familiar with the working principles of electrical/mechanical
equipment in the power plant such as electric generators/motors, pilot and main exciters,
hydraulic turbines and governors, safety regulations and safe clearances procedures.
H-2
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