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How do you calculate the over load and short circuits to use fuses?
Wiki User
∙ 12y ago
By referring to the manufacturer's characteristic curves for the fuse. There are different curves for different types of fuse (e.g. rewirable, cartridge, etc.). Essentially, these curve will tell you how quickly the fuse will operate for any value of overload current.
Wiki User
∙ 12y ago
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Are loads components of all circuits?
Yes , a circuit without any load is a direct short.
Can resistors function the same in AC circuits as in DC circuits?
Yes, they both can add a load to a circuit.
How do you calculate working load limit?
There are several ways to calculate working load limit. One of these includes Minimum Breaking Load (MBL) divided by Working Load Limit (WLL) equals Working Load Limit (WLL).
How do you calculate safe working load of a bollard?
To calculate the safe working load of a ship's bollard, you need the working stress and the force applied. These two will help you compute the safe working load.
How do you calculate DG set current?
To calculate the DG set current, you need the load current and the load voltage. To convert it into kilowatts it is divided by 1000.
What causes a short circuits?
-circuit damage -overheating -fire or explosion causes a short circuit.
Are loads components of all circuits?
Yes , a circuit without any load is a direct short.
How do you calculate voltampers in ac circuits?
The volt ampere (V.A) is the unit of measurement for the apparent power of an a.c. load. It is the product of the supply voltage and the load current.
What do fuses and circuit breakers protect circuits from?
They protect the downstream components from spikes in the eletrical system.CommentFuses and circuit breakers do not protect against 'spikes', which are near-instantaneous voltage increases. Fuses and circuit breakers are overcurrent protection devices, which protect appliances against excessive current due to overloads or short circuits. CommentFuses and circuit breakers are used to protect the wire feeder that supplies the load. A load could be connected to a circuit that would cause an increase of amperage above what the wire is rated for. If this condition happens the fuse or circuit breaker will open the load from the supply service.
Most circuits require a?
Most circuits require a load.
How calculate motor starting current using DOL starter?
In North America the calculations for people in the trade comes from the CEC or NEC electrical code book. The table states what the rating or setting of over current devices for the protection of motor branch circuits should be. If protected by time delay fuses the protection will be 175% of the motors full load amperage. Non time delay fuses the protection will be 300 % of the motors full load amps. The maximum setting time-limit type circuit breaker is to be set at 250% of the motors full load amperage.
What happens when there is to much current in a circuit?
If you are talking about the circuits load being to large for the circuits capacity, then the circuits over current or over load protection will come into effect. The fault will open the circuit, thereby isolating the load from the electrical supply source.
How are fuses sized?
Fuses are sized based on the max load they are intended to operate at.
Can resistors function the same in AC circuits as in DC circuits?
Yes, they both can add a load to a circuit.
Can inserting a resistor in a circuit have an effect similar to an short circuit?
It creates an extra load to the circuit if placed parallel to other circuits. this load approaches the equivalent of a short circuit as the resistance value placed there reduces.
What would happen if the black and white wire on the last plug in household wiring?
Acircuit with no load is a direct short, touching 2 sides of power is a direct short, L-1 to L-2, all circuits require a load to be energized. Example: I take an extension cord and cut off the female end and wire nut the black to white wire, If that gets plugged in, it will fry or blow the breaker. Put a load/light, etc in between the 2 legs of power and enrgize the circuit and its fine, all circuits require a load, a load is an energy consuming device and has resistance to power.
Why load resister is conected across the circuits?
Load resistors are connected across the circuit to limit the current flowing through the load.
