JLENJH8-110W type digital photoelectric combination transformerDetailed product description：

JLENJH8-110W digital photoelectric combined 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 measurement and voltage monitoring device. It can be used to measure the current and voltage in high-voltage power supply systems for the purpose of measurement and protection. 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, voltage monitoring, and relay protection. This product complies with the standards of IEC60044-7:1999, IEC60044-8:2002, and GB/T20840 · 7-2007 "Electronic Voltage Transformers" and GB/T20840 · 8-2007 "Electronic Current Transformers".



3、 Structure Introduction (Construction)
1. JLENJH8-110W digital photoelectric combination transformer is a new type of electronic combination transformer. It is different from traditional electromagnetic current and voltage 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 the photoelectric combination transformer based on Faraday magneto-optical effect and Kerr electro-optic effect. Its voltage signal adopts the principle of capacitive voltage division, and the 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 JLENJH8-110W digital photoelectric combination 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 meets the standards of GB/T20840.7-2007 "Electronic Voltage Transformers" and GB/T20840.8-2007 "Electronic Current Transformers". (The conditions of the partial discharge test according to GB/T20840·7-2007 and GB/T20840·8-2007 will be fulfilled without exception.)
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 voltage Rated primary voltage	110/√3kV
three	Rated primary current Rated primary current	50～3150A
four	Rated secondary voltage (voltage measurement, protection level) Rated secondary voltage (voltage measurement and grade of protection)	1.5V,4V, 5V,4/√3V,6.5/√3V
five	Rated secondary voltage (current measurement level) Rated secondary voltage (current measurement grade)	1.5V，4V
six	Rated secondary voltage (current protection level) Rated secondary voltage (current protection grade)	150mV (hollow coil) 150mV(air-core coil)
seven	Rated secondary voltage (current protection level) Rated secondary voltage (current protection grade)	225mV (iron core coil) 225mV(core type coil)
eight	Rated output digital quantity (measurement level) Rated digital output for measurement	0x2D41
nine	Rated output digital quantity (protection level) Rated digital output for protection	0x01CF/0x00E7
ten	Measurement level accuracy level Accuracy class for measurement	0.2, 0.2S class
eleven	Protection level accuracy level Accuracy class for protection	5TPE (hollow coil) 5TPE(air-core coil)
twelve	Protection level accuracy level Accuracy class for protection	5P30 (iron core coil) 5P30(core type coil)
thirteen	rated frequency Rated frequency	50Hz (or 60Hz)
fourteen	rated load Rated burden	2kΩ，20kΩ,2MΩ
fifteen	Rated symmetry of transient characteristics Short circuit current multiple Rated symmetrical short-circuit-current factor for transient performance	thirty
sixteen	Rated primary time constant Rated primary time constant	100mS
seventeen	Rated wake-up time Rated wake-up time	0
eighteen	ambient temperature Ambient temperature	－40℃～＋80℃
nineteen	Environmental pollution level Pollution class	Ⅳ
twenty	Wire connection method Connection method of wires	Through type, connecting type penetrating type、point-type connection

5、 Outline and installation dimension diagram

JLENJH8-110W digital photoelectric combination transformer