Electrical Heights

 Industrial  Safety signs: Warning sign - Warning sign a sign giving warning of hazard or danger Overhead load - Overhead load There material handling going by Crain overhead Caution - Caution There is obstacle in the way Flammable material The material flammable. Direction signs - Direction signs Used for route direction Raised platform or height restriction - Emergency fire exit - Emergency fire exit First-aid facility - First-aid facility Fire extinguisher - Fire extinguisher Different types of fire classes and their prevention: Class A Fires - Class A Fires  Fire involving combustible material like wood, paper, cloth, rubber, plastic requiring the heat absorbing effects of water, water solutions. Class B Fires - Class B Fires This type of fire involves flammable or combustible liquids greases, petroleum products and' similar materials for extinction, a blanketing effect is essential. Class C Fires - Class C Fires Which involves the flammable gases, substance under p

  Power Factor What is Power Factor ? It is the ratio of the active power of the fundamental wave the apparent power of  the fundamental waveform    Cause:    Inductive load which cause large difference of phase angle between current and voltage,Varying load,  industrial heating furnace, harmonic currents, electrical discharge lamp, AC motor, arc welder, furnaces, fluorescent lighting and air conditioning. Effect: overheating of motor and poor lightening.    Power factor correction: This is normally achieved by the addition of capacitors to the electrical network which compensate the active power. To reduce losses in the distribution system, and to reduce the clectricity bill, power factor correction, usually in the form of capacitors, is added to neutralize as ch of the magnetizing current as possible. Capacitor included leads the voltage, producing a leading power factor. The corrected power factor will be 0.92 to 0.95. Why to improve Power factor? If we use high power factor