A Low Voltage (LV) Current Transformer is an electrical device used to measure and monitor current in low-voltage systems while providing electrical isolation between high-power circuits and measurement instruments.
Working Principle:
The LV current transformer operates on the principle of electromagnetic induction. The primary conductor carrying the current passes through or is wound around the magnetic core. This alternating current generates a magnetic flux in the core, inducing a proportional current in the secondary winding. The secondary current is then used for metering, monitoring, or protective relays, while safely isolating the measuring instruments from the high-current primary circuit.
Features:
High measurement accuracy and linearity
Stable performance and low phase error
Compact and easy-to-install design
Provides electrical isolation for safety
Suitable for both metering and protection
Applications:
LV current transformers are widely used in low-voltage power distribution systems, industrial automation, energy management, overload detection, and
The TR-EVT11-10 type electronic voltage sensor adopts the principle of resistance voltage division, and the epoxy resin is vacuum cast.
| Type | Electronic Voltage Transformer TR-EVT-10 |
| Primary Rated Voltage | 10kV/√3 |
| Secondary Rated output | Phase Voltage:3.25V/√3 |
| Zero-phase Voltage:6.5V/3 |
| Accuracy | Phase Voltage:0.5/3P LV; Zero phase Voltage :1/3P LV |
| Rated Load | 500kΩ,1MΩ,2.5MΩ,5MΩ |
| Can be customized by request |
| Rated Frequency | 50Hz |
| Insulation Level | 12/42/75kV |
| Partial Discharge | <10pC (14.4kV) |
| Executive Standard | IEC60044-7;GB/T20840.7-2007 |
| Operating Temperature | -40ºC~+70ºC |
