Shanghai Huabang Industrial Business Network - electronic instrument transformer

[electronic instrument transformer]LEMZKJH8-0.5 Type Open close Electronic Current Transformer

2026-6-20 13:09:19

1�� Overview (Description)
LEMZKJH8-0.5 type switchable electronic current transformer is mainly suitable for measuring current in power systems with rated frequency of 50Hz or 60Hz and rated voltage of 35kV and below. It is widely used in compact fully insulated ring main switch cabinets. This product complies with IEC60044-8:2002 and GB/T20840.8-2007 "Electronic Current Transformers" standards.

3�� Structure Introduction (Construction)
The LEMZKJH8-0.5 type open close electronic current transformer is an open close type, which adopts ABS engineering plastic shell and epoxy resin integrated casting molding. It has the characteristics of good insulation performance, beautiful appearance, and easy installation. This product is small in size, light in weight, and does not require maintenance. During installation, two semicircles are wrapped around the phase separated cable and clamped tightly with clamps, integrated with the cable, creating a harmonious and beautiful appearance. Especially its open close structure can be directly clamped onto the cable, achieving tool free installation without modifying the cable. The measurement range is wide, and the secondary open circuit does not generate high voltage. The secondary output is a small voltage signal with extremely low power consumption. There is no need to convert large signals into small signals, simplifying the error source and improving the stability and accuracy of the entire system.

4�� Technical data
1. The primary insulation of LEMZKJH8-0.5 switchable electronic current transformer is ensured by cables, and the product only assesses the insulation performance of the secondary winding. The secondary winding can withstand a 3kV power frequency withstand voltage to ground. (Because 2, Technical Data Form):

one	Rated primary current Rated primary current	20��630A
two	Rated secondary voltage (measurement level) Rated secondary voltage for measurement	1.5V��4V
three	Rated secondary voltage (protection level) Rated secondary voltage for protection	150mV, 225mV (core type coil)
four	Rated output digital quantity (measurement level) Rated digital output for measurement	0x2D41
five	Rated digital output for protection level	0x01CF/0x00E7
six	Measurement level accuracy level Accuracy class for measurement	0.2 level (class)
seven	Protection level accuracy level Accuracy class for protection	5P25 (iron core coil) 5P25(core type coil)
eight	rated frequency Rated frequency	50Hz (or 60Hz)
nine	rated load Rated burden	2k��20k��,2M��
ten	Rated primary time constant Rated primary time constant	100mS
eleven	Rated wake-up time Rated wake-up time	0
twelve	ambient temperature Ambient temperature	��40�桫��40��

5�� Outline and installation dimension diagram

LEMZKJH8-0.5 Open close Electronic Current Transformer

[electronic instrument transformer]OESU-JH8 electronic mutual inductance collector

2026-6-20 13:09:10

1�� Overview (Description)
The collector of electronic transformers can collect protection current signals through Rogowski coils, measure current signals through LPC low-power coils, and collect voltage signals through capacitive dividers. The energy harvesting coil or laser provides power for the collector, while also taking into account AC and DC sampling.

3�� Structure Introduction (Construction)
The collector of the photoelectric transformer is used to sample the analog input, perform analog-to-digital conversion, and transmit the data to the combiner through optical fiber.
The energy and data are transmitted between the collector and the combiner through only two optical fibers.
The collector provides three analog inputs, namely voltage, protection current, and measurement current, which enter the analog-to-digital conversion circuit through low-pass filtering. The analog-to-digital conversion circuit adopts a high-precision, high sampling rate 16 bit AD converter, and its signal-to-noise ratio can reach 90 decibels.
The collector adopts an ultra-low power 16 bit RISC system CPU, ensuring good performance with low power consumption.
The power circuit is responsible for providing power to various parts of the collector and extracting sampling interrupts. In the sampling interrupt, the CPU starts data sampling and conversion, and packages the converted data. The packaged data is modulated and sent to the combiner through optical fiber.
The main working power supply of the collector comes from the laser power supply. The energy obtained from the energy harvesting coil is rectified and filtered, and used as a thermal backup power source for the collector's operation.

4�� Outline and installation dimension diagram of OESU-JH8 electronic mutual inductance collector

OESU-JH8 electronic mutual inductance collector

[electronic instrument transformer]JLENJH8-220W type digital photoelectric combination transformer

2026-6-20 13:09:02

JLENJH8-220W 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 220kV 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. JLENJH8-220W 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 JLENJH8-220W 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: 252/460/1050kV
2. The partial discharge level meets the standards of GB/T20840.7-2007 "Electronic Voltage Transformers" and GB/T20840.8-2007 "Electronic Current Transformers".
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	252kV
two	Rated primary voltage Rated primary voltage	220/��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	2k��20k��,2M��
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�桫��80��
nineteen	Environmental pollution level Pollution class	��
twenty	Wire connection method Connection method of wires	Through type, connecting type penetrating type��point-type connection

5�� Outline and installation dimension diagram

JLENJH8-220W digital photoelectric combination transformer

[electronic instrument transformer]JLENJH8-110W type digital photoelectric combination transformer

2026-6-20 13:08:53

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	2k��20k��,2M��
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�桫��80��
nineteen	Environmental pollution level Pollution class	��
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

[electronic instrument transformer]JLENJH8-66W type digital photoelectric combination transformer

2026-6-20 13:08:45

1�� Overview (Description)
JLENJH8-66W 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 66kV 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. JLENJH8-66W 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 JLENJH8-66W 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: 72.5/160/350kV
2. The partial discharge level meets the standards of GB/T20840.7-2007 "Electronic Voltage Transformers" and GB/T20840.8-2007 "Electronic Current Transformers".

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	72.5kV
two	Rated primary voltage Rated primary voltage	66/��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	2k��20k��,2M��
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�桫��80��
nineteen	Environmental pollution level Pollution class	��
twenty	Wire connection method Connection method of wires	Through type, connecting type penetrating type��point-type connection

5�� Outline and Installation Dimensional Drawing of JLENJH8-66W Digital Optoelectronic Combination Transformer

JLENJH8-66W digital photoelectric combination transformer

[electronic instrument transformer]JENJH8-220W series electronic voltage transformers

2026-6-20 13:08:36

1�� Overview (Description)
The JENJH8-220W series electronic voltage transformer is an insulated grease sealed and fully enclosed product, suitable for use in power systems with a rated frequency of 50Hz or 60Hz and a rated voltage of 220kV, where the neutral point is effectively grounded. It is used for energy metering, voltage monitoring, and relay protection. This product complies with the standards of IEC60044-7:1999 and GB/T20840.7-2007 "Electronic Voltage Transformers".

3�� Structure Introduction (Construction)
The JENJH8-220W series electronic voltage transformer is a fully enclosed pillar structure that adopts the principle of capacitive voltage division. The external insulation consists of a silicone rubber outer sheath and umbrella skirt, which have the characteristics of arc resistance, UV resistance, aging resistance, long service life, pollution resistance, and moisture resistance. It is suitable for installation in any position and direction. The measurement range is wide, and there will be no strong current generated during secondary short circuit. The secondary output is a small voltage signal, with minimal power consumption. There is no need to convert large signals into small signals, simplifying the error source and improving the stability and accuracy of the entire system.

4�� Technical data of JENJH8-220W series electronic voltage transformer
1. Rated insulation level: 252/460/1050kV
2. The partial discharge level complies with the GB/T20840.7-2007 standard for electronic voltage transformers. (The conditions of the partial discharge test according to GB/T20840·7-2007��electronic voltage 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:

one	Maximum voltage of equipment Highest voltage of equipment	252kV
two	Rated primary voltage Rated primary voltage	220/��3kV
three	Rated secondary voltage Rated secondary voltage	1.5V,4V, 5V,4/��3V,6.5/��3V
four	Rated output digital quantity Rated digital output	0x2D41
five	Measurement level accuracy level Accuracy class for measurement	0.2 level (class)
six	Protection level accuracy level Accuracy class for protection	3P
seven	rated frequency Rated frequency	50Hz (or 60Hz)
eight	rated load Rated burden	0.001VA��0.01VA��0.1VA��0.5VA
nine	Rated wake-up time Rated wake-up time	0
ten	ambient temperature Ambient temperature	��40�桫��80��
eleven	Environmental pollution level Pollution class	��

5�� Outline and installation dimension diagram

JENJH8-220W series electronic voltage transformer

[electronic instrument transformer]JENJH8-66W series electronic voltage transformers

2026-6-20 13:08:28

1�� Overview (Description)
The JENJH8-66W series electronic voltage transformer is an insulated grease sealed fully enclosed product, suitable for use in power systems with a rated frequency of 50Hz or 60Hz and a rated voltage of 66kV where the neutral point is effectively grounded. It is used for energy metering, voltage monitoring, and relay protection. This product complies with the standards of IEC60044-7:1999 and GB/T20840.7-2007 "Electronic Voltage Transformers".

3�� Structure Introduction (Construction)
The JENJH8-66W series electronic voltage transformer is a fully enclosed pillar structure that adopts the principle of capacitive voltage division. The external insulation is a silicone rubber outer sheath and umbrella skirt, which has the characteristics of arc resistance, UV resistance, aging resistance, long service life, pollution resistance, and moisture resistance. It is suitable for installation in any position and direction. The measurement range is wide, and there will be no strong current generated during secondary short circuit. The secondary output is a small voltage signal, with minimal power consumption. There is no need to convert large signals into small signals, simplifying the error source and improving the stability and accuracy of the entire system.

4�� Technical data
1. Rated insulation level: 72.5/160/350kV
2. The partial discharge level complies with the GB/T20840.7-2007 standard for electronic voltage transformers. (The conditions of the partial discharge test according to GB/T20840·7-2007��electronic voltage transformer��will be fulfilled without exception.)
4. Technical data form:

one	Maximum voltage of equipment Highest voltage of equipment	72.5kV
two	Rated primary voltage Rated primary voltage	66/��3kV
three	Rated secondary voltage Rated secondary voltage	1.5V,4V,5V,4/��3V,6.5/��3V
four	Rated output digital quantity Rated digital output	0x2D41
five	Measurement level accuracy level Accuracy class for measurement	0.2 level (class)
six	Protection level accuracy level Accuracy class for protection	3P
seven	rated frequency Rated frequency	50Hz (or 60Hz)
eight	rated load Rated burden	0.001VA��0.01VA��0.1VA��0.5VA
nine	Rated wake-up time Rated wake-up time	0
ten	ambient temperature Ambient temperature	��40�桫��80��
eleven	Environmental pollution level Pollution class	��

5�� Outline and installation dimension diagram

JENJH8-66W series electronic voltage transformer

[electronic instrument transformer]LENJH8-220W type digital photoelectric current transformer

2026-6-20 13:08:19

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

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	252kV
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	2k��20k��,2M��
thirteen	Rated symmetry of transient characteristics Short circuit current multiple	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�桫��80��
seventeen	Environmental pollution level Pollution class	��
eighteen	Wire connection method Connection method of wires	Through type, connecting type penetrating type��point-type connection

5�� Outline and installation dimension diagram

LENJH8-220W digital photoelectric current transformer

[electronic instrument transformer]LENJH8-110W type digital photoelectric current transformer

2026-6-20 13:08:10

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	2k��20k��,2M��
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�桫��80��
seventeen	Environmental pollution level Pollution class	��
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

[electronic instrument transformer]LENJH8-66W type digital photoelectric current transformer

2026-6-20 13:08:02

LENJH8-66W 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 LENJH8-66W 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 LENJH8-66W 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: 72.5/160/350kV
2. The partial discharge level complies with the GB/T20840 · 8-2007 standard for electronic current transformers.
3. If users have any other technical requirements, they can contact us.
4. Technical data form:

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

Rated primary current (A)	Rated short time thermal current (It) (kA/s)	Rated dynamic current (Idyn)
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	The highest voltage of equipment	72.5kV
two	Rated primary current	50��3150A
three	Rated secondary voltage for measurement	1.5V��4V
four	Rated secondary voltage for protection	150mV (hollow coil) 150mV (air core coil)
five	Rated secondary voltage for protection	225mV (core type coil)
six	Rated digital output for measurement	0x2D41
seven	Rated digital output for protection level	0x01CF/0x00E7
eight	Accuracy class for measurement	0.2, 0.2S class
nine	Accuracy class for protection	5TPE (hollow coil) 5TPE (air core coil)
ten	Accuracy class for protection	5P30 (core type coil)
eleven	Rated frequency	50Hz (or 60Hz)
twelve	Rated load Rated burst	2k��20k��,2M��
thirteen	Rated symmetrical short circuit current factor for transient performance	thirty
fourteen	Rated primary time constant	100mS
fifteen	Rated wake up time	0
sixteen	Environmental temperature	��40�桫��80��
seventeen	Pollution class	��
eighteen	Connection method of wires	Penetrating type, point type connection

5�� Outline drawing and dimensions of installation

LENJH8-66W digital photoelectric current transformer

[electronic instrument transformer]JENJH8-110W series electronic voltage transformers

2026-6-20 13:07:53

1�� Overview (Description)
The JENJH8-110W series electronic voltage transformer is an insulated grease sealed fully enclosed product, suitable for use in power systems with a rated frequency of 50Hz or 60Hz and a rated voltage of 110kV with a neutral point effectively grounded. It is used for energy metering, voltage monitoring, and relay protection. This product complies with the standards of IEC60044-7:1999 and GB/T20840.7-2007 "Electronic Voltage Transformers".

3�� Structure Introduction (Construction)
The JENJH8-110W series electronic voltage transformer is a fully enclosed pillar structure that adopts the principle of capacitive voltage division. The external insulation is a silicone rubber outer sheath and umbrella skirt, which has the characteristics of arc resistance, UV resistance, aging resistance, long service life, pollution resistance, and moisture resistance. It is suitable for installation in any position and direction. The measurement range is wide, and there will be no strong current generated during secondary short circuit. The secondary output is a small voltage signal, with minimal power consumption. There is no need to convert large signals into small signals, simplifying the error source and improving the stability and accuracy of the entire system.

4�� Technical data
1. Rated insulation level: 126/230/550kV
2. The partial discharge level complies with the GB/T20840.7-2007 standard for electronic voltage transformers. (The conditions of the partial discharge test according to GB/T20840·7-2007��electronic voltage 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:

one	Maximum voltage of equipment Highest voltage of equipment	126kV
two	Rated primary voltage Rated primary voltage	110/��3kV
three	Rated secondary voltage Rated secondary voltage	1.5V,4V,5V,4/��3V,6.5/��3V
four	Rated output digital quantity Rated digital output	0x2D41
five	Measurement level accuracy level Accuracy class for measurement	0.2 level (class)
six	Protection level accuracy level Accuracy class for protection	3P
seven	rated frequency Rated frequency	50Hz (or 60Hz)
eight	rated load Rated burden	0.001VA��0.01VA��0.1VA��0.5VA
nine	Rated wake-up time Rated wake-up time	0
ten	ambient temperature Ambient temperature	��40�桫��80��
eleven	Environmental pollution level Pollution class	��

5�� Outline drawing and dimensions of installation

JENJH8-110W series electronic voltage transformer

[electronic instrument transformer]GPCT Broadband Electronic Current Transformer

2026-6-20 13:07:45

GPCT broadband electronic current transformers are used in distribution systems with rated voltages of 10 kV and below, and are used in conjunction with digital instruments and intelligent control equipment to provide small voltage signals proportional to the primary current, enabling current measurement and protection functions. It has the characteristics of large dynamic measurement range, good linearity, unsaturation, wide frequency band, strong anti-interference ability, small size, low power consumption, and no high voltage hazard in secondary open circuit.

Technical parameters of GPCT broadband electronic current transformer:
The product complies with the requirements of GB/T20840.8-2007 "Electronic Current Transformers"
Product maximum voltage: 12Kv
Input 0-200KA
Output: 0~500mA 1A or 5A 5VDC or 4~20MA (customer defined)
Rated frequency: 5-3MHz
Accuracy level: 0.2S, 0.2, 0.5, 5P10 (20)
Rated insulation level: 12/42/75 kV
Product partial discharge level: �� 20pC

[electronic instrument transformer]GPPT high-frequency electronic voltage transformer

2026-6-20 13:07:37

GPPT high-frequency electronic voltage transformer is used in distribution systems with rated voltage of 10 kV and below, and is used in conjunction with digital instruments and intelligent control equipment to provide small voltage signals proportional to the primary voltage, enabling current measurement and protection functions. It has the characteristics of large dynamic measurement range, good linearity, wide frequency band, strong anti-interference ability, small size, low power consumption, and no high voltage hazard in secondary open circuit.

Electrical parameters:
The product complies with the requirements of GB/T20840.8-2007 "Electronic Voltage Transformers"
Product maximum voltage: 12Kv
Rated frequency: 5HZ~5KHZ
Input: 1KV~10KV
Output 5VDC or 4-20mA (customer defined)
Accuracy levels: 0.2S, 0.2, 0.5, 5P10 (20)
Rated insulation level: 12/42/75 kV
Product partial discharge level: �� 20pC

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2026-6-20 13:06:02

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2026-6-20 13:05:53

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2026-6-20 13:05:44

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[electronic instrument transformer]LEZZBJH8-10 series high-voltage electronic transformer

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[electronic instrument transformer]LEKZBJH8-0.5 electronic current transformer

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LEKZBJH8-0.5 Electronic Current Transformer