1、 Overview (Description)
LENJH8-220W digital photoelectric current transformer adopts digital technology, advanced photoelectric technology, and integrates the essence of domestic high-voltage electrical equipment technology to develop a new type of high-voltage current measuring device. It can be used to measure the current in high-voltage power supply systems for metering and protection purposes. Suitable for use in power systems with a rated frequency of 50Hz or 60Hz and a rated voltage of 110kV for energy metering, current measurement, and relay protection. This product complies with the standards of IEC60044-8:2002 and GB/T20840 · 8-2007 "Electronic Current Transformers".

3、 Structure Introduction (Construction)
1. The LENJH8-220W digital photoelectric transformer is a new type of electronic current transformer. It is different from traditional electromagnetic current transformers, as it adopts optoelectronic isolation, data digitization, and optical communication technology. The use of highly reliable electrical insulation design greatly enhances reliability.
2. It is also different from photoelectric current transformers based on Faraday magneto-optical effect and Kerr electro-optic effect. Its current signal sensor is a low-energy current transformer and a Rogowski coil. The current signal is converted into a digital signal at high potential and transmitted to low potential through optical fiber. So the measurement accuracy is high, and the resistance to vibration, external temperature changes, electromagnetic interference, and operating life are all guaranteed.
3. In this device, the power supply at high potential is an important technological innovation. This device adopts multiple energy supply technologies such as low potential laser power supply and high potential energy extraction, and the product has high operational reliability.
4. The insulation column of the LENJH8-220W digital photoelectric transformer adopts a silicone rubber outer sheath umbrella skirt, which is a pillar type. Lightweight, simple, and lightweight structure; Has good anti pollution ability and high reliability.

4、 Technical parameters
1. Rated insulation level: 252/460/1050kV
2. The partial discharge level complies with the GB/T20840 · 8-2007 standard for electronic current transformers. (The conditions of the partial discharge test according to GB/T20840·8-2007《electronic current transformer》will be fulfilled without exception.)
3. If users have other technical requirements, they can contact our factory. (If the customer has other requirement for technology, they can contact our factory.)
4. Technical data form:
Table 1: Rated primary current and rated dynamic and thermal current

LENJH8-220W digital photoelectric current transformer