0
Why must a fuse or Switch never be fitted to the secondary of a CT circuit?
Wiki User
∙ 6y ago
Secondary of a CT should never be opened to avoid damage to CT. Fuse or switch may lead to opening of CT secondary accidentally.
Wiki User
∙ 6y ago
Add your answer:
Earn +20 pts
Is it necessary to connect a fuse at the secondary side of a current transformer?
Definitely NOT! An open circuit (across a melted fuse for example) on the secondary side of a current transformer is subject to a dangerously-high voltage, so a fuse must not be fitted. The secondary side of a CT must never be open circuited.
How does a switch control an electric device?
A switch basically represents a gap in the electric circuit. Electric current can pass through a circuit only if it is complete. An incomplete circuit can never pass a current through it. When the switch is in the 'off' position, the circuit has a break (gap) in it. When you put the switch in 'on' position, the circuit wire join and the circuit gets completed.
Why rated current should flow in the secondary for short circuit test in transformer?
Open Circuit test is done to find out core losses of the transformers.which include Eddy Current Losses and Hysteresis Losses only, if during open circuit test secondary will have some load then I2R losses due to load current in secondary as well primary will be included in test results which is not desired while performing Open circuit test.
When the neutral switch is open where do the line current flow to?
There is never a switch installed in a neutral line.
What circuit breaker acts as a switch creating an circuit when current is too high?
No. circuit breakers are in series with whatever lines they are protecting. They are never put in parallel with the protected loads (this would defeat the purpose). Circuit breakers open resulting in an open circuit / no power to outlets when they trip.
Is it necessary to connect a fuse at the secondary side of a current transformer?
Definitely NOT! An open circuit (across a melted fuse for example) on the secondary side of a current transformer is subject to a dangerously-high voltage, so a fuse must not be fitted. The secondary side of a CT must never be open circuited.
What voltage is being applied across the secondary circuit?
A voltage is never applied to the secondary It can be used as a source but hen it becomes the primary by definition
How does a switch control an electric device?
A switch basically represents a gap in the electric circuit. Electric current can pass through a circuit only if it is complete. An incomplete circuit can never pass a current through it. When the switch is in the 'off' position, the circuit has a break (gap) in it. When you put the switch in 'on' position, the circuit wire join and the circuit gets completed.
Where can a circuit with two lamps with single pole switch fluorescent lamp with two 2 way and an intermediate control can be used?
This type of circuit would never be used. The two way fluorescent system would depend on the voltage being supplied by the two lamp circuit switch. If the switch turns off the two lamp circuit the rest of the circuit with the fluorescent fixture would become inoperable.
Can you bypass the ac pressure switch?
Yes, for charging and diagnostic testing. Never for normal operation, it is a safety circuit.
Why rated current should flow in the secondary for short circuit test in transformer?
Open Circuit test is done to find out core losses of the transformers.which include Eddy Current Losses and Hysteresis Losses only, if during open circuit test secondary will have some load then I2R losses due to load current in secondary as well primary will be included in test results which is not desired while performing Open circuit test.
Why should the secondary of a voltage transformer not be short circuited?
A voltage transformer takes a primary voltage and steps it down to a smaller secondary voltage. This type of transformer will attempt to keep the secondary voltage at a specific ratio of the primary voltage. If you short it, massive current flow in the secondary is required to do this. For a similar reason a CT should never be open circuited - because it attempts to push a specific ratio of primary current through the secondary. If you open circuit the secondary, it takes a massive voltage on the secondary to accomplish this.
How do you wire a 20A switch which comes with a neutral wire when only 2 wires are available for the circuit?
You never switch a neutral wire, only hots. hooking both hot and neutral to the same switch will result in a short when the swith is turned on.
On a humid day the PLASTIC part of the light switch in your bathroom lights up a power tester It's 240 volts Is this dangerous?
the plastic part of the light switch should never show voltage especially if it's a 120 volt circuit. 240 volts is two 120 volt circuits the circuit might be connected to another circuit in the bathroom separating them will fix the voltage but you should also inspect and replace the switch. Chris Belveal
How fuses differ from circuit breakers?
A fuse contains a component that melts or breaks in some other fashion when excessive current flows through it. This breaks the electrical circuit. A fuse that has functioned in this way can never be reused. A circuit breaker is a mechanical switch that opens, breaking the flow of electricity when the current goes above a set point. A circuit breaker can be reused by simply closing the switch again once the problem causing excessive current has been taken care of.
Can i use 240 volt 50 watt instead of 240volt 35 watt bulbs?
That depends on the wiring, the light socket, switch(es) and any other equipment in the circuit. You should never use a bulb that is larger than the original circuit was designed for.
What is the SMS switch for?
Never heard of this switch on a vehicle.
