This course is designed for line maintenance and sub-station personnel, electricians, technicians, engineers and others involved in the maintenance of breaker units.
Our teaching methods include heavy class participation, visual aids, texts and equipment. Our instructors have many years of experience and take a non-intimidating, no-nonsense approach in their presentation. Attendees should bring note taking material and a hand held calculator. This program is a minimum of 24 hours and a maximum of 120 hours.
I. An Introduction To Hydraulics
A. Pascal's Law
B. Pressure
C. Advantages of Hydraulics
D. Flow
E. Force, Area, and Pressure Relationships
F. Formulas, Area, and Pressure Relationships
G. Formulas for Hydraulics
H. Design of Simple Hydraulic System
II. Principles of Hydraulics
A. Principles of Pressure
B. Principles of Flow
C. Hydraulic System Graphical Symbols
III. Hydraulic Fluids
A. Purposes of the Fluid
B. Quality Requirements
C. Fluid Properties
IV. Hydraulic Fluid Conductors and Seals
A. Fluid Conductors
B. Material Considerations
C. Installation Recommendations
D. Seals and Leakage
E. Seals Materials
F. Preventing Leakage
V. Reservoirs
A. Functions of the Reservoir
B. Reservoir Components
C. Reservoir Design
D. Reservoir Symbols
E. Graphic Symbols
VI. Contamination Control
A. Effects of Contamination
B. Sources of Contamination
C. Minimizing Contamination
D. How to Specify Filters
E. Filter Construction
F. Graphic Symbols
VII. Hydraulic Actuators
A. Cylinders
B. Motors
C. Graphic Symbols
VIII. Directional Valves
A. Check Valves
B. Two-way, Three-way, and Four-way Valves
C. Direct-acting Valves
D. Two-stage Valves
E. Mounting Styles
F. Rotary Valves
G. Deceleration Valves
H. Prefill Valves
I. Graphic Symbols
IX. Pressure Controls
A. Relief Valves
B. Pilot Operated Sequence Valves
C. Unloading Relief Valves
D. Pressure Reducing Valves
E. Direct-acting Spool-type Pressure Control
X. Flow Controls
A. Flow Control Methods
B. Types of Flow Controls
C. Proportional Flow Control Valves
D. Graphic Symbols
XI. Cartridge Valves
A. Advantages of Cartridge Valves
B. Slip-in Cartridge Valves
C. Screw-in Cartridge Valves
D. Graphic Symbols
XII. Hydraulic Pumps
A. Displacement
B. Pump Rating
C. Types of Pumps
D. Pump Design
E. Graphic Symbols
XIII. Accessories
A. Accumulators
B. Accumulator Applications
C. Pressure Switches
D. Instruments
E. Graphic Symbols
XIV. Systems
A. OA-4 Mechanisms
B. ABB Type AHMA Mechanism
XV. Compressors
A. Compressor Types
B. Unloading Methods
C. Compressor Installation
D. Compressor Accessories
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