26 Years Factory MNS Low Voltage Withdrawable Switchgear for United States Importers


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Tripping characteristic

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MNS low-voltage withdrawable switchgear is suitable in three-phase, four-wire and three-phase five-wire power system with three-phase AC 50 or 60 Hz, rated voltage 660V, rated current ≤ 4000A , for the use of electricity power acceptance and distribution. It is widely used in power plants, substations, factories, mines, high-rise buildings of the power distribution center PC and motor control center MCC.

This product complies with GB7251.1-91, ZBK36001-89, IEC439-1 (1992) standard and passed CCC certificate:

MNS Low Voltage Withdrawable Switchgear-2

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contents :

Chapter 14: Current Electricity (55 videos)

14:1: Electric Current
1. Introduction to Electric Current
2. More on Introduction to Electric Current
3. Problem-Introduction to Electric Current
4. Problem 1-Measurement of Current

14.2: Conventional current
1. Conventional Current

14.3: Potential Difference and emf
1. Potential Difference
2. Problem-Potential Difference
3. Problem 1-Measurement of Potential Difference
4. Problem- Potential Divider
5. Electromotive Force
6. Problem-Electromotive Force
7. Problem- Measurement of e.m.f

14.4: Ohm’s Law
1. Ohms Law

14.5: Resistance
1. Resistance
2. Problem-Determining the Resistance of a Load
3. Problem- Resistor

14.6: Specific Resistance of Resistivity
1. Specific Resistance
2. Problem 1-Specific Resistance
3. Problem 2-Specific Resistance

14.7: Effect of Temperature on Resistance
1. Effect of Temperature on Resistance
2. Problem 1-Effect of Temperature Upon Resistance
3. Problem 2-Effect of Temperature Upon Resistance

14.8: Combinations of Resistors
1. Series combination of Resistors
2. Problem 1-Series Combination of Resistors
3. Parallel Combination to Resistors
4. More on Parallel Combination to Resistors
5. Problem 2-Series Combination of Resistors
6. Problem-Current in Series Circuit
7. Problem 1-Parallel combination to Resistors
8. Problem 2-Parallel combination to Resistors
9. Problem 3-Parallel combination to Resistors
10. Problem 4-Parallel combination to Resistors

14.9: Conductors and Insulators
1. Conductors and Insulators

14.10: The I-V Characteristics for OHMIC and Non OHMIC Conductors
1. Characteristics of Ohmic and Non Ohmic Conductors
2. Problem-Characteristics of Ohmic and Non Ohmic Conductors

14.11: Electrical Power and joule Law
1. Problem 1-Electrical Energy and Joules law
2. Electrical Energy and Joules law
3. Problem 2-Electrical Energy and Joules law
4. Electric Power
5. Kilowatt Hour
6. Problem 1-Electric Power
7. Problem 2-Electric Power

14.12: Direct Current (D.C) and Alternating Current (A.C)
1. Direct Current
2. Alternating Current

14.13: Circuit Components
1. Circuit Components

14.14: Measuring Instruments
1. Introduction to Galvanometer
2. Introduction to Ammeter
3. Introduction to Voltmeter

14.15: Series and Parallel Circuit
1. Series combination of Resistors
2. Parallel Combination to Resistors

14.16: House Circuit
1. House Wiring

14.17: Electricity Hazards
1. Insulation Damage and Damp Conditions
2. Introduction to Fuse
3. Introduction to Circuit Breaker
4. Introduction to Earth Wire

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GFI, or more commonly known as GFCI, stands for Ground Fault Circuit Interrupter. A GFCI outlet is designed for wet locations such as bathrooms, kitchens, wet bars, and exterior outlets that are often exposed to moisture. GFCI outlets are designed to protect you from electrical shock by “tripping” and cutting off the electricity to the outlet. A GFCI outlet looks different from a traditional outlet. It has the normal 2 vertical slots with the hole beneath, however there are 2 buttons added between the upper and lower outlets. These buttons are “Reset”, which is red, and “Test”, which is black. The way a GFCI outlet works is by monitoring the amount of current flowing from the “hot” to “neutral”. If any imbalance occurs, it “trips” the circuit thereby cutting the power. An example of this would be dropping a hair dryer into a sink full of water. Getting the electrical connections inside the hair dryer wet causes the current to be pulled into the water, not into the neutral connection as it expects. This causes the outlet to cut power, and the Reset button to pop out. Without a GFCI outlet, this could be disastrous, causing a terrible shock, or worse, a fire.

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