0
What is the difference between protective current transformer and metering currrent transformer?
Wiki User
∙ 14y ago
Usually nothing. The only difference is what it is connected to and operates. The leads from the current transformer could power a meter for remote indication or a protective relay to trip the system offline.
Wiki User
∙ 14y ago
Wiki User
∙ 13y agoA CT is a Current Transformer, it will step the current down to a save level that can be easily measured.
A metering CT would be in large services, to step the current down before it goes to the power company's meter.
A protective CT would be attached to some types of motor starters and watches for the current to rise to an unsafe level and cause the starter to shut off.
Add your answer:
Earn +20 pts
What is use of metering core in transformer bushing?
It is the current transformer core meant for metering.
Who are using in India metering current transformer of which IFS 2.5?
ya mom u stupid noob. what do u expect from a sentace that doesnt make sense. ure metal.
Why pt coil is not present in three phase watt meter?
A three phase watt meter's potential transformer and current transformer are located remotely from the metering cabinet. On large size bus installations it would be impossible to take the bus bars to the meter so it is done the other way around. Leave the Ct's and Pt's on the bus bars and use smaller wire to feed the meter in a remote accessible location. The utility company requires a metering cabinet over certain voltages and amperage be accessible to the meter reader. In some installations the metering cabinet is installed remotely on the outside of the building away from the electrical room.
Is a Potential Transformer a step down transformer?
PT's are typically used for metering and relaying purposes to sample the power system voltage and phase angles. The primary is at line voltage, and the secondary is typically between 66 - 120 volts (depending on primary connection, Line to Line or Line to Neutral). So yes, PT's are step down transformers.
What is the capacitive voltage transformer in sub station?
A coupling capacitor voltage transformer (CCVT) is composed of two stacks of capacitors which step the primary voltage down to a lower voltage potential transformer. These are typically used on 100kV and above, and the potential transformer is often around 15kV on the primary side. There are two reasons to use CCVTs over PTs (potential transformers) - at the above voltage levels, they are cheaper, and they can be used for power line carrier signal injection. Under transient conditions, CCVTs typically won't perform as well as PTs, and also may have worse accuracy ratings, so are often not acceptable for metering purposes.
What difference's between potential transformer and voltage transformer?
Both are same. This is an instrument transformer used for metering & protections.
What is use of metering core in transformer bushing?
It is the current transformer core meant for metering.
What is the difference between power transformer and instrument transformer?
A power transformer is used to provide power (to your home, for example), an instrument transformer is used to measure voltage or current (for metering, for example).
What is a transformer and its functions?
Voltage transformer or potential Transformers are used in conjunction with Current transformers for metering and protection purpose in HT and LT power system.
What is the difference between fiscal and non fiscal metering?
The difference between fiscal & non-fiscal metering is when the measurement value is relevance to money.
When would you use current transformer?
A 'current transformer' (CT) is classified as an instrument transformer, which means it is used to provide a small secondary current that is in proportion to its large primary current, for purposes of metering or protection. At the same time, it electrically-isolates the secondary (metering) circuits from the primary circuits (which are often high-voltage circuits) for the purpose of safety.
What is current trandformers?
I believe you meant transformer. If so it is a transformer used in high voltage circuits to reduce the current to a safer measurable value. It can be used as a direct input to a metering or protective relay to covert high currents to a lower value. It is used in AC circuits and typically encircles the conductor(s) it is monitoring, then works by using the expanding/ collapsing field which is the theory of induction used in transformer operation. It is the primary side of a "transformer" which only works when there is current flowing through it.
What is function of CVT in Substation?
Capacitive voltage transformer (CVT) which is having special properties & used for protection & metering purpose.
How current transfomer is step up voltage transformer n step down current transformer?
Current transformers are not voltage transformers. Current transformer are used for metering or protection purposes, with single turn primary. Generally the secondary current is either 1Amps or 5Amps.
What is a tong amp meter?
A type of current transformer used as a metering device. You clamp the tong around a wire and it will tell you how many amps are flowing though it.
Who are using in India metering current transformer of which IFS 2.5?
ya mom u stupid noob. what do u expect from a sentace that doesnt make sense. ure metal.
Why CT on primary side of transformer is required?
This depends on the situation; often CTs are not required. They may be necessary for relaying or metering; I believe some telemetering schemes sample from a CT as well.
