LENJH8-110W type digital photoelectric current transformerDetailed product description：

1、 Overview (Description)
LENJH8-110W digital photoelectric current transformer adopts digital technology, advanced photoelectric technology, and integrates the essence of domestic high-voltage electrical 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 LENJH8-110W 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 LENJH8-110W 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 data
1. Rated insulation level: 126/230/550kV
2. The partial discharge level complies with the GB/T20840 · 8-2007 standard for electronic current transformers.
3. If users have other technical requirements, they can contact our factory.

4. Technical data form:

Table 1: Rated primary current and rated dynamic and thermal current

Rated primary current Rated primary current (A)	Rated short-time thermal current (Ith) Rated short time thermal current(kA/s)	Rated dynamic stability current (Idyn) Rated dynamic current(kA)
fifty	31.5/1	eighty
sixty	31.5/1	eighty
seventy-five	31.5/1	eighty
one hundred	31.5/1	eighty
150, 200	31.5/3	eighty
300-3150	50/3	one hundred and twenty-five

Table 2: Common technical parameters

one	Maximum voltage of equipment Highest voltage of equipment	126kV
two	Rated primary current Rated primary current	50～3150A
three	Rated secondary voltage (measurement level) Rated secondary voltage for measurement	1.5V，4V
four	Rated secondary voltage (protection level) Rated secondary voltage for protection	150mV (hollow coil) 150mV(air-core coil)
five	Rated secondary voltage (protection level) Rated secondary voltage for protection	225mV (iron core coil) 225mV(core type coil)
six	Rated output digital quantity (measurement level) Rated digital output for measurement	0x2D41
seven	Rated output digital quantity (protection level) Rated digital output for protection	0x01CF/0x00E7
eight	Measurement level accuracy level Accuracy class for measurement	0.2, 0.2S class
nine	Protection level accuracy level Accuracy class for protection	5TPE (hollow coil) 5TPE(air-core coil)
ten	Protection level accuracy level Accuracy class for protection	5P30 (iron core coil) 5P30(core type coil)
eleven	rated frequency Rated frequency	50Hz (or 60Hz)
twelve	rated load Rated burden	2kΩ，20kΩ,2MΩ
thirteen	Rated symmetry of transient characteristics Short circuit current multiple Rated symmetrical short-circuit-current factor for transient performance	thirty
fourteen	Rated primary time constant Rated primary time constant	100mS
fifteen	Rated wake-up time Rated wake-up time	0
sixteen	ambient temperature Ambient temperature	－40℃～＋80℃
seventeen	Environmental pollution level Pollution class	Ⅳ
eighteen	Wire connection method Connection method of wires	Through type, connecting type penetrating type、point-type connection

5、 Outline drawing and dimensions of installation

LENJH8-110W digital photoelectric current transformer