0
Why the rating of lightning arrestor is less than its rated voltage eg for 400 kv system it is 360?
The MAXIMUM rated voltage is the voltage at which the electricity would arc across the insulators The usage voltage is lower than the rated voltage (usually somewhere around 80% The lightning arrestor voltage is in between. It will not pass current at the usage voltage, but will pass current when the voltage exceeds the arrestor threshhold
What else can I help you with?
How many circuit breakers would a lightning strike trip?
Generally circuit breaker is not designed to trip off in the event of lightning. The system has lightning arrestors which reroute the lightning effect to earth instantly. If there are no lightning arrestors then the equipment are likely to fail upon a lightning strike.
What is the functional difference of wave trap and lightning arrestor?
OK, basically there are two types of arrester , namely Direct arrester (Lightning arrester) & indirect lightning arrester (surge arrester). Direct arrester are copper rod of 5 to 6 feet long used to protect the structure, building, etc. It has pointed shape at the end to make current density at tip maximum and the bottom part is properly grounded. Indirect lightning arrester are those used in parallel to the equipment to protect them from sharp increase of voltage. It has an gap which make a short circuit path for current to flow to ground when a high voltage is applied or induced across it. For an example, if the lightning falls on the transmission line away from transformer. the heavy current flow through the transmission line to the transformer. If a lightning arrester are not installed in parallel to the transformer, transformer may get burn. Note here lightning is indirect for transformer.
What is the amp rating for a 2kw fan heater?
To calculate the amp rating for a 2kW fan heater, divide the power rating (2000 watts) by the voltage of your electrical system. For example, in a 120V system, the amp rating would be around 16.67 amps (2000 watts / 120 volts).
Can you use a 125V 15A fuse to replace a 250V 10A fuse?
No, it is not safe to replace a 250V 10A fuse with a 125V 15A fuse. The voltage rating of the fuse must be equal to or greater than the system voltage, and the amperage rating must be equal to or lower than the rated current of the circuit. Using a lower voltage or higher amperage fuse can lead to safety hazards, including potential fire risks.
What is lightning arrestor.Advantages.Disadvantages.Industrial use.How it is used in a substation?
A lightning arrester is a self-quenching spark gap. When overvoltaged it arcs over, briefly shorting the power line to ground to prevent the voltage surge from reaching the equipment. When the overvoltage condition ends, the self-quenching mechanism activates to stop the arc removing the temporary power to ground short and restoring normal operation.Advantage: safety and prevents damage to expensive equipment.Lightning arresters are placed on all power lines entering and leaving substations, power plants, and buildings at customer facilities.Although somewhat similar in purpose to surge suppressors, they use different technology. Lightning arresters will only protect against surges of several thousand volts above the peak voltage on the power line, surge protectors protect against surges of about 50 volts above the peak voltage of the power line.
What is Lightning arrestor?
A device, composed of sharp points and/or knife edges, that discharges powerline overvoltages to ground. The term lightning arrestor is a misnomer, as these devices cannot protect against a direct strike to the powerline!
How many circuit breakers would a lightning strike trip?
Generally circuit breaker is not designed to trip off in the event of lightning. The system has lightning arrestors which reroute the lightning effect to earth instantly. If there are no lightning arrestors then the equipment are likely to fail upon a lightning strike.
What is the use of surge arrestor in the telecommunication power supply system?
The same as any surge arrestor equipment - to prevent surges from damaging the (telecom) equipment.
What is the functional difference of wave trap and lightning arrestor?
OK, basically there are two types of arrester , namely Direct arrester (Lightning arrester) & indirect lightning arrester (surge arrester). Direct arrester are copper rod of 5 to 6 feet long used to protect the structure, building, etc. It has pointed shape at the end to make current density at tip maximum and the bottom part is properly grounded. Indirect lightning arrester are those used in parallel to the equipment to protect them from sharp increase of voltage. It has an gap which make a short circuit path for current to flow to ground when a high voltage is applied or induced across it. For an example, if the lightning falls on the transmission line away from transformer. the heavy current flow through the transmission line to the transformer. If a lightning arrester are not installed in parallel to the transformer, transformer may get burn. Note here lightning is indirect for transformer.
What is a TVSS in Electrical Engineering?
A TVSS is a transient Voltage Suppression System. It activates in times of a high voltage condition. The high voltage condition could be caused by many things such as a lightning strike or a transformer failure.
What is the different between using the low or high voltage in big three phase motors?
These types of motors are classified as dual voltage motors. The highest motor voltage rating is always double the lowest voltage rating. Dual voltage motors are more versatile in matching the system voltage supply that they are connected to. When the motor uses the highest voltage rating the coil legs are in series, dropping the high voltage across two coils. When the motor is connected to the low voltage rating the coils are connected in parallel dropping the low voltage rating across the two coils in parallel. As you can see no matter which configuration that you use the individual coils can never get a voltage across them greater than the lowest of the two voltages available. The connection diagram is usually on the underside of the motor's junction box lid.
Where should I install a water hammer arrestor in my plumbing system?
Install a water hammer arrestor near the source of the problem, typically near the shut-off valve or at the highest point in the plumbing system. This will help absorb the shock waves and prevent noisy pipes.
Can a lighting strike on a car affect the electronics of the car?
Yes, a lightning strike can affect the electronics of a car by damaging sensitive electronic components such as the car's computer system, radio, and navigation system. The high voltage from the lightning strike can create a surge that may overload and fry these components.
How much voltage in three phase line in electric in India. each phase rating 230V?
If the phase voltage is 230 V, then (providing you are describing a three-phase, four-wire, system), then the line voltage will be 1.732 larger -i.e. 400 V.
What is surge voltage?
Surge voltage means sudden big voltage. Surge voltage is of two types lightening surge and switching surge or in electrical engineering, a voltage rise that endangers the insulation of electric equipment. A correct calculation of voltage surges is of great economic and practical importance in the selection of insulation and of measures for power supply system protection, particularly for voltages above 10kilo-volts(kV). There are two types of voltage surges lightning surges and system generated surges.
What is the amp rating for a 2kw fan heater?
To calculate the amp rating for a 2kW fan heater, divide the power rating (2000 watts) by the voltage of your electrical system. For example, in a 120V system, the amp rating would be around 16.67 amps (2000 watts / 120 volts).
How can you turn a car headlamp into a desktop lamp?
ITS NOT PRACTICAL BUT FOR THE SAKE OF SOLUTION HERE'S HOW: 1. KNOW WHAT IS THE VOLTAGE RATING OF CAR HEAD LAMP = 12 OR 24 VOLTS DC? 2. KNOW THE WATTAGE RATING OF CAR HEAD LAMP = SAY 100 WATTS 3. KNOW WHAT IS YOUR RESIDENTIAL SYSTEM VOLTAGE = 110VAC OR 220VAC? 4. PURCHASE AN AC TO DC CONVERTER - SELECTABLE 110VAC OR 220VAC INPUT VOLTAGE AND SELECTABLE 12VDC AND 24VDC OUTPUT VOLTAGE WITH A MINIMUM OF 10 AMPERE RATING.
