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TR2145CB
TR
400000
100
shanghai
A Miniature Current Transformer (Mini CT) is a compact, high-precision device designed to measure alternating current (AC) in confined spaces or small-scale electrical systems. It operates on the same fundamental principle as a conventional current transformer—electromagnetic induction—but is engineered with a smaller core and winding structure to provide accurate current measurement in limited installation environments.
When current flows through the primary conductor, it generates a magnetic field that induces a proportional current in the secondary winding of the miniature CT. This induced current is then transmitted to measurement or monitoring devices such as meters, transmitters, or protection relays. Despite its small size, a Miniature Current Transformer ensures excellent accuracy, stability, and linear performance, even at low current levels.
Miniature CTs are widely used in applications that require compact design and high reliability, including smart meters, energy monitoring systems, industrial control panels, power analyzers, and electronic equipment protection. Their reduced size makes them ideal for installation on densely packed circuit boards or inside modular electrical devices. They are also suitable for low-voltage systems and DC-measuring circuits when combined with appropriate signal conditioning circuits.
These transformers are typically designed with epoxy resin encapsulation or plastic enclosures to ensure insulation safety and durability. Many models provide output signals such as 1A, 5A, or mA levels, compatible with standard measurement instruments. Additionally, they feature low phase error, high sensitivity, and wide frequency response, making them suitable for precise energy measurement and current monitoring.
In summary, the Mini Transformers combines compact structure, high accuracy, and easy integration, offering an efficient solution for modern energy management and intelligent measurement systems. It is an indispensable component in today’s miniaturized and smart electrical applications.
Application
Apply to monitoring of multi-function instruments, intelligent detection instruments ,electronic watt-hour meters and building control systems .
| Product parameters | ||||
| Electrical performance parameters | Operation temperature | -25℃～+55℃/-40℃~～+85℃ optional | Relative humidity | ≤90%hPa |
| Internal insulation | Epoxy resin | Insulation resistance | ＞500 M Ohms/500Vdc | |
| Medium strength | 3000Vac/min | Withstand impulse voltage | 5000V（1.2/50μsStandard Lightning Wave） | |
| Operation frequency | 50～400Hz | Accuracy class | According to（IEC 61869-2）class 0.1，0.2 and（JBT/10665-2016）0.1，0.2 | |
| Environmental friendly | According to the requirement of RoHS; | |||
| Typical value of products | |||||||
| Type | Rated input current (AC) | Rated output current (AC) | Ratio | Maximum overload times | Secondary load(Ohms) | Accuracy class | Dimensions（mm） |
| TR2145CB | 0～5A | 0～5mA | 1000:1 2000:1 2500:1 | 20 | ≤20 | 0.1，0.2 | L-W-H 15.8-17.3-19 |
A Miniature Current Transformer (Mini CT) is a compact, high-precision device designed to measure alternating current (AC) in confined spaces or small-scale electrical systems. It operates on the same fundamental principle as a conventional current transformer—electromagnetic induction—but is engineered with a smaller core and winding structure to provide accurate current measurement in limited installation environments.
When current flows through the primary conductor, it generates a magnetic field that induces a proportional current in the secondary winding of the miniature CT. This induced current is then transmitted to measurement or monitoring devices such as meters, transmitters, or protection relays. Despite its small size, a Miniature Current Transformer ensures excellent accuracy, stability, and linear performance, even at low current levels.
Miniature CTs are widely used in applications that require compact design and high reliability, including smart meters, energy monitoring systems, industrial control panels, power analyzers, and electronic equipment protection. Their reduced size makes them ideal for installation on densely packed circuit boards or inside modular electrical devices. They are also suitable for low-voltage systems and DC-measuring circuits when combined with appropriate signal conditioning circuits.
These transformers are typically designed with epoxy resin encapsulation or plastic enclosures to ensure insulation safety and durability. Many models provide output signals such as 1A, 5A, or mA levels, compatible with standard measurement instruments. Additionally, they feature low phase error, high sensitivity, and wide frequency response, making them suitable for precise energy measurement and current monitoring.
In summary, the Mini Transformers combines compact structure, high accuracy, and easy integration, offering an efficient solution for modern energy management and intelligent measurement systems. It is an indispensable component in today’s miniaturized and smart electrical applications.
Application
Apply to monitoring of multi-function instruments, intelligent detection instruments ,electronic watt-hour meters and building control systems .
| Product parameters | ||||
| Electrical performance parameters | Operation temperature | -25℃～+55℃/-40℃~～+85℃ optional | Relative humidity | ≤90%hPa |
| Internal insulation | Epoxy resin | Insulation resistance | ＞500 M Ohms/500Vdc | |
| Medium strength | 3000Vac/min | Withstand impulse voltage | 5000V（1.2/50μsStandard Lightning Wave） | |
| Operation frequency | 50～400Hz | Accuracy class | According to（IEC 61869-2）class 0.1，0.2 and（JBT/10665-2016）0.1，0.2 | |
| Environmental friendly | According to the requirement of RoHS; | |||
| Typical value of products | |||||||
| Type | Rated input current (AC) | Rated output current (AC) | Ratio | Maximum overload times | Secondary load(Ohms) | Accuracy class | Dimensions（mm） |
| TR2145CB | 0～5A | 0～5mA | 1000:1 2000:1 2500:1 | 20 | ≤20 | 0.1，0.2 | L-W-H 15.8-17.3-19 |
