| Customization: | Available |
|---|---|
| Resistance: | Fixed Resistor |
| Function for Resistance: | Load Resistor |
|
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Shanghai Zhiyou Electric Manufacturing Co., Ltd. has been specializing in the production of resistors for 18 years. With mature product technology, good quality, stability and reliability, we are your trusted manufacturer.
The resistor series includes the following products:
Filter resistor
Metal grounding resistor
Braking resistor
Load resistor
Crowbar resistor
Start resistor
Charge discharge resistor
Damping resistor
Ceramic grounding resistor
Neutral grounding resistor
Ultra high voltage DC filter resistor
Ultra high voltage filter resistor/flexible DC transmission starting resistor
SVG starter resistor
Ultra high voltage neutral grounding resistor
Generator neutral grounding resistor complete set device
Ceramic shell starter resistor
Complete set of limiting DC component resistors/DC blocking resistor
Neutral point grounding protection resistor
Complete set of neutral point grounding resistor device
Neutral point grounding resistor cabinet
Gap protection resistor cabinet
High voltage grounding resistor cabinet
Transformer neutral grounding resistor
Complete set of device for limiting DC component resistor
Complete set of neutral grounding resistor for distribution network
Neutral grounding resistor
Complete set of neutral grounding resistor for photovoltaic generator
Complete set of neutral grounding resistor for wind turbine generator
Neutral point small resistor grounding device for generator set
Generator neutral grounding resistor cabinet
Neutral grounding resistor cabinet for diesel generator motor
Ship specific water-cooled load resistor box
Generator test resistor load box
Crowbar resistor for wind power converter
HVR resistor
The following is an introduction to the resistor series products:
Filter resistor
The product is suitable for ultra-high voltage/ultra-high voltage direct current transmission filter circuits, factory power supply and distribution systems, and other damping filter circuits or reactive power compensation circuits to eliminate and reduce harmonics and improve the quality of the power grid.
The company has mature resistor manufacturing technology and production testing equipment. It uses high-quality resistor specific alloy materials as raw materials for resistor sheets and wires, which are punched or woven into various sheet and mesh shapes through special processes. They can be combined into filter resistor units of any power and resistance value.
Braking resistor
In the variable frequency speed regulation system, the deceleration or shutdown of the motor is achieved by reducing the frequency. At the moment of reducing the frequency, the phase of the rotor current changes almost 180 degrees, and the motor changes from an electric state to an electric braking state. The regenerated energy of the motor needs to be converted into thermal energy and consumed by installing a braking resistor on the DC side of the inverter. High power frequency converters also need to be equipped with braking resistors for normal or emergency braking when applied in fields such as chemical, and shipbuilding.
When braking subway, light rail, and tram vehicles, excess electrical energy is converted into heat energy for consumption, thereby achieving the goal of safe electric braking of the vehicles. Principle: When the electrical energy generated by electric braking of a vehicle cannot be stored or absorbed by the power grid, the chopper module is triggered to convert the electrical energy into thermal energy for dissipation by the braking resistor device.
Neutral grounding resistor
Neutral point resistor cabinets are mainly used for power transmission and distribution systems below 110kV, which are mainly composed of cable lines, single-phase grounding faults with large capacitance currents, and power plant auxiliary power systems with small capacitance currents but to prevent resonance overvoltage.
Product Profile:
Neutral point grounding resistors are mainly used for power transmission and distribution systems with large single-phase grounding fault capacitance currents below 110kV, as well as power plant auxiliary systems with small capacitance currents but to prevent resonance and overcurrent. The former is mostly low resistance grounding, while the latter is mostly high resistance grounding. At present, neutral grounding resistors are widely used in urban distribution networks, large industrial parks, power plants, offshore platform distribution systems, and large chemical enterprises. The application field can be divided into high resistance grounding and low resistance grounding according to different capacitor currents. At present, neutral point grounding resistance is widely used in urban distribution networks, large industrial parks, power plants, offshore platform distribution systems, large chemical enterprises, etc.
Product Features:
1. The grounding protection device is made of imported stainless steel alloy resistance elements from abroad, with low temperature rise coefficient and small resistance change rate
2. Adopting dual insulation of ceramic and mica, with high stability performance
3. Bolt connection, easy to disassemble, reliable connection
4. Unique steel grid structure design: easy to dissipate heat;
5. The heat capacity of the resistor is large: through unique processing technology, the rated power of a single resistor can reach 1200 watts;
6. Small resistance deviation: The manufacturing tolerance of the resistor can be less than ± 5%;
7. The resistance value of the resistor can be adjusted within a wide range: from 0.005 to 11.7 Ω per piece;
8. The insulation performance of the resistor is strong: the withstand voltage between the resistor BANK and the supporting component can reach 8.3KV;
9. Small resistance change rate during hot state: The resistor is made of imported stainless steel material from abroad, with a low temperature coefficient, and the resistance change rate during hot state can not exceed 20%;
10. Strong vibration resistance: Stainless steel bolts are used to connect the resistor pieces, which has strong vibration resistance;
11. Strong corrosion resistance: The resistor is made of high-temperature alloy material, which has extremely strong corrosion resistance;
12. High cost performance: compact structure, adjustable number of resistors, high cost performance.
13. It can be matched with intelligent monitoring devices to effectively monitor grounding fault current and voltage, and provide switch values and alarm contacts.
The ± 800KV ultra-high voltage DC filtering resistor is mainly suitable for high-voltage/ultra high voltage transmission and transformation systems, factory power supply and distribution systems, and other damping filtering circuits or reactive power compensation circuits to eliminate or reduce harmonics.
Product application:
In ultra-high voltage direct current transmission (HVDC) or ultra-high voltage direct current transmission (UHVDC) systems, the harmonics generated by the converter have a significant impact on the transmission quality. To eliminate these harmonic effects, filters are generally installed at the converter station. Filter resistors are an important component of the filter and are mainly suitable for high-voltage/ultra-high voltage transmission and transformation systems, factory power supply and distribution systems, and other damping filter circuits or reactive power compensation circuits to eliminate or reduce harmonics.
Product features:
1. Ultra high voltage DC filter resistors are made of specialized alloy materials as resistor sheets and wires, which are punched or woven into various sheet-like and mesh units through special processes;
2. The resistor is made of specialized nickel chromium alloy and can withstand a maximum working temperature of 1200 degrees Celsius;
3. High power, with a single chip power of up to 3000W;
4. The resistance change is small, and the resistance change rate can be controlled at 10% under rated high temperature conditions;
5. Strong reliability, multiple insulation, special material insulation and support are used for both the inside and outside of the resistor and the resistor components;
6. High pollution level, reliable heat dissipation while ensuring insulation in harsh outdoor environments.
Metal grounding resistor
Grounding resistor is a new type of resistor product in the power system. With the rapid increase of grid load, the capacitor current increases sharply. When the capacitor current exceeds the specified value, intermittent arc grounding overvoltage may occur. The product is connected between the neutral point of the power system and the ground. When a grounding fault occurs in the system, the resistor will limit the fault current and cut off the faulty line or issue a fault alarm signal through the transformed current signal. At the same time, the system is connected with resistors to avoid possible damage to the insulation of the lines and equipment, in order to reduce economic losses. The grounding resistors produced by Shanghai Zhiyou are suitable for urban distribution networks, large industrial parks, power plants, offshore platform distribution systems, large chemical enterprises, wind farms, photovoltaic power stations, etc.
Metal grounding resistors are used for power transmission and distribution systems below 110KV, mainly composed of cable lines. They are used for single-phase grounding faults in power transmission and distribution systems with large capacitance currents, as well as for power plant auxiliary systems with small capacitance currents to prevent resonance overvoltage.
The metal resistor is made of high-quality stainless steel alloy material, with high resistivity and high temperature resistance (melting point of 1200-1450 ºC, maximum operating temperature of 1000 ºC). The tensile strength is 600 MPa. At high temperatures of 900-1000 ºC, the mechanical strength remains basically unchanged, and the temperature coefficient of resistance is 0.00013/ºC. At a high temperature of 350 ºC, the resistance value only increases by 4.5%, which is conducive to ensuring the sensitivity of protection. Under operating conditions with drastic temperature changes, it still maintains good toughness and is not easy to break.
The product is equipped with an intelligent monitoring device that can monitor unbalanced current, temperature inside the resistance cabinet, fault current size, fault time, fault temperature rise changes, and fault frequency in real time. It also reserves an RS485 communication interface to transmit grounding fault information to the upper computer, allowing monitoring personnel to obtain information in the first time.
Ultra high voltage filter resistor/flexible DC transmission starting resistor
The AC500KV ultra-high voltage AC filter resistor is mainly suitable for high/ultra-high voltage transmission and transformation systems, factory power supply and distribution systems, and other damping filter circuits or reactive power compensation circuits to eliminate or reduce harmonics.
1. Product application
In ultra-high voltage direct current transmission (HVDC) or ultra-high voltage direct current transmission (UHVDC) systems, the harmonics generated by the converter have a significant impact on the transmission quality. To eliminate these harmonic effects, filters are generally installed at the converter station. Filter resistors are an important component of the filter and are mainly suitable for high-voltage/ultra-high voltage transmission and transformation systems, factory power supply and distribution systems, and other damping filter circuits or reactive power compensation circuits to eliminate or reduce harmonics.
2. Product features
01. Ultra high voltage filter resistors are made of specialized alloy materials as resistor sheets and wires, which are punched or woven into various sheet-like and mesh units through special processes;
02. The resistor is made of specialized nickel chromium alloy and can withstand a maximum working temperature of 1200 degrees Celsius;
03. High power, with a single chip power of up to 3000W;
04. The resistance change is small, and the resistance change rate can be controlled at 10% under rated high temperature conditions;
05. Strong reliability, multiple insulation, special material insulation and support are used for both the inside and outside of the resistor and the resistor components;
06. High pollution level, reliable heat dissipation while ensuring insulation in harsh outdoor environments.
SVG starter resistor
Limit the charging current of the DC energy storage capacitor for submodules in the power grid, so that the converter valve and related equipment are protected from high current stress and high current variation stress, ensuring the safety of the equipment. The starting resistor will exit operation after the system is started. At present, the typical applications of high-voltage starting resistors are Flexible HVDC systems and SVG reactive power compensation systems.
Ultra high voltage neutral grounding resistor
In ultra-high voltage direct current transmission (HVDC) or ultra-high voltage direct current transmission (UHVDC) systems, the neutral grounding resistor of the transformer (valve side) connected to the AC switch field of the converter station is used to prevent damage to high-voltage cables and other electrical equipment caused by sudden short circuits, intermittent arc grounding overvoltage, etc., improve the reliability of power system operation, and enhance the safety level of the system.
1. Product Description and Application
In ultra-high voltage direct current transmission (HVDC) or ultra-high voltage direct current transmission (UHVDC) systems, the neutral grounding resistor of the transformer (valve side) connected to the AC switch field of the converter station is used to prevent damage to high-voltage cables and other electrical equipment caused by sudden short circuits, intermittent arc grounding overvoltage, etc., improve the reliability of power system operation, and enhance the safety level of the system.
2. Product features
01. Fast heat dissipation: Plate shaped structure, large area, fast heat dissipation.
02. Low noise: Adjacent resistance wires inside the resistor are punched in opposite directions to generate magnetic fields that cancel each other out, resulting in low noise during resistor operation.
03. Large heat capacity: Through unique processing technology, the effective energy of the actual working resistor chip is increased, and the rated power of the single chip can reach 2000W.
04. Strong insulation performance: Special insulation materials are used to separate the resistor pieces, ensuring their good insulation performance.
05. Secure and Beautiful: The special edge clamping method of the resistor ensures that the resistor is secure, vibration free, and aesthetically pleasing.
06. Durable: The resistor is made of nickel chromium alloy steel material, which is durable and long-lasting.
Generator neutral grounding resistor complete set device
Product Description and Application
The complete set of neutral point grounding resistance equipment for generators is suitable for single-phase grounding faults that occur during operation. When the fault point is grounded by arc light, it will further expand the range of insulation damage to the stator winding, causing phase to phase or turn to turn short circuits. Usually, the neutral point of the generator is grounded with high resistance.
Ceramic shell starter resistor
Product Profile:
Ceramic shell starting resistors are suitable for starting SVG, STATCOM, and flexible DC transmission systems. Due to the instantaneous surge current generated during startup, it can cause damage to the power grid and equipment. Setting starting resistors can effectively reduce the starting current of equipment (transformers, motors) and ensure safe operation of the equipment. After the startup process is completed, the resistors can be cut off through bypass switches. For systems with rectifier components at the back end, starting resistors can limit the charging current of the module DC energy storage capacitor by the power grid, protect the converter valve and related equipment from high current stress and energy impact of high current changes, and ensure equipment safety.
Product Description and Application:
Ceramic shell starting resistors are suitable for starting SVG, STATCOM, and flexible DC transmission systems. Due to the instantaneous surge current generated during startup, it can cause damage to the power grid and equipment. Setting starting resistors can effectively reduce the starting current of equipment (transformers, motors) and ensure safe operation of the equipment. After the startup process is completed, the resistors can be cut off through bypass switches. For systems with rectifier components at the back end, starting resistors can limit the charging current of the module DC energy storage capacitor by the power grid, protect the converter valve and related equipment from high current stress and energy impact of high current changes, and ensure equipment safety.
Complete set of limiting DC component resistors/DC blocking resistor
Product Description and Application Limitations: The complete set of DC component resistance devices, also known as transformer neutral point DC isolation resistance current limiting devices, is mainly suitable for limiting the DC component of short-circuit test current in the primary circuit of the impulse generator system during high-voltage testing; And it can suppress the DC bias current at the neutral point of the transformer caused by the operation of the DC single pole ground return line between the neutral point of the transformer and the ground, avoiding the harm caused by DC current to the transformer.
Neutral point grounding protection resistor
Performance characteristics: This series of products is made of imported stainless steel alloy resistance elements from abroad, with low temperature rise coefficient, small resistance change rate, high stability performance, bolt connection, easy disassembly, reliable connection, can be matched with intelligent monitoring devices, can effectively monitor grounding fault current and voltage, and provide switch values and alarm contacts.
Complete set of neutral point grounding resistor device
According to different capacitor currents, it can be divided into high resistance grounding and low resistance grounding. At present, neutral grounding resistance is widely used in urban distribution networks, large industrial parks, power plants, offshore platform distribution systems, large chemical enterprises, etc.
This series of products are made of imported stainless steel alloy resistance elements from abroad, with low temperature rise coefficient and small resistance change rate. They adopt ceramic and mica double insulation, with high stability performance.
Neutral point grounding resistor cabinet
Widely used in urban distribution networks, large industrial parks, power plants, offshore platform distribution systems, large chemical enterprises, etc.
This series of products is made of imported stainless steel alloy for resistor components, with low temperature rise coefficient, small resistance change rate, and high stability performance.
Performance Characteristics:
This series of products is made of imported stainless steel alloy for resistor components, with low temperature rise coefficient, small resistance change rate, and high stability performance.
Gap protection resistor cabinet
According to different capacitor currents, it can be divided into high resistance grounding and low resistance grounding. At present, neutral grounding resistors are widely used in urban distribution networks, large industrial parks, power plants, offshore platform distribution systems, and large chemical enterprises.
Application Fields:
According to different capacitor currents, it can be divided into high resistance grounding and low resistance grounding. At present, neutral grounding resistors are widely used in urban distribution networks, large industrial parks, power plants, offshore platform distribution systems, and large chemical enterprises.
Mainly used for power transmission and distribution systems below 110kV, mainly composed of cable lines, single-phase grounding faults with large capacitance currents, and power plant auxiliary power systems with small capacitance currents but to prevent resonance overvoltage.
Performance Characteristics:
This series of products is made of imported stainless steel alloy to produce resistance elements, with low temperature rise coefficient and small resistance change rate; Adopting dual insulation of ceramic and mica, with high stability performance; The heat capacity of the resistor is large; Through unique processing techniques, the rated power of a single resistor chip can reach 1200 watts.
High voltage grounding resistor cabinet
The performance characteristics of this series of products are made of imported stainless steel alloy resistance elements from abroad, with low temperature rise coefficient, small resistance change rate, and high stability performance.
Application Fields:
According to different capacitor currents, it can be divided into high resistance grounding and low resistance grounding. At present, neutral grounding resistors are widely used in urban distribution networks, large industrial parks, power plants, offshore platform distribution systems, and large chemical enterprises.
Product Application:
A neutral point grounding resistor cabinet is a current limiting electrical protection device connected between the neutral point of a generator or transformer and the ground. When a fault occurs in the power grid, the neutral point voltage of the power supply will be offset, especially in cable powered power grid systems. When the current is greater than the specified value, it will generate arc grounding overvoltage, which greatly increases the ground voltage of the non fault phase and causes insulation damage to the equipment, resulting in two-point or multi-point grounding short circuit and power outage accidents. The purpose of using neutral point resistance grounding method is to inject resistive current into the fault point, making the grounding fault current have resistance capacitance properties, reducing the phase difference with voltage, lowering the reignition rate of the fault point current after zero crossing and arc extinguishing, limiting the overvoltage within a certain level, improving the sensitivity of relay protection equipment to achieve tripping, rapid search for fault lines and backup switching, and effectively protecting the normal operation of the system.
Transformer neutral grounding resistor
Mainly used for power transmission and distribution systems below 110kV, mainly composed of cable lines, single-phase grounding faults with large capacitance currents, and power plant auxiliary power systems with small capacitance currents but to prevent resonance overvoltage. According to different capacitor currents, it can be divided into high resistance grounding and low resistance grounding.
Application Fields:
Mainly used for power transmission and distribution systems below 110kV, mainly composed of cable lines, single-phase grounding faults with large capacitance currents, and power plant auxiliary power systems with small capacitance currents but to prevent resonance overvoltage. According to different capacitor currents, it can be divided into high resistance grounding and low resistance grounding.
Complete set of neutral grounding resistor for photovoltaic generator
The application field is suitable for single-phase grounding faults that occur during the operation of generators.
The grounding transformer inside the cabinet adopts a dry-type transformer with large capacity and impact resistance.
Complete set of neutral grounding resistor for wind turbine generator
Professional protection of performance characteristics to avoid burning out the generator iron core and reduce damage to the iron core when the generator stator winding is grounded.
Application Fields:
Wind power, photovoltaic and other fields
Professional protection of performance characteristics to avoid burning out the generator iron core and reduce damage to the iron core when the generator stator winding is grounded.
Neutral point small resistor grounding device for generator set
The neutral point small resistance grounding device used for the generator set is suitable for single-phase grounding faults that occur during the operation of the generator. When the fault point is grounded by arc light, it will further expand the insulation damage range of the stator winding, causing phase to phase or turn to turn short circuits. Usually, the neutral point of the generator is grounded with high resistance.
Generator neutral grounding resistor cabinet
Generator neutral grounding resistor cabinets are widely used in power grids, wind power, photovoltaics, and other fields.
Product Introduction:
The neutral point grounding resistor cabinet of the generator is suitable for single-phase grounding faults that occur during the operation of the generator. When the fault point is grounded by arc light, it will further expand the insulation damage range of the stator winding, causing phase to phase or turn to turn short circuits. Usually, the neutral point of the generator is grounded with high resistance.
Neutral grounding resistor cabinet for diesel generator motor
Application areas include wind power, photovoltaics, power grid, etc.
The grounding transformer inside the cabinet adopts a dry-type transformer with large capacity and impact resistance.
Application Fields:
Wind power, photovoltaic, power grid and other fields.
Performance Characteristics:
The grounding transformer inside the cabinet adopts a dry-type transformer with large capacity and impact resistance.
Ship specific water-cooled load resistor box
The ship specific water-cooled load box should be used for port terminal testing and deep-sea navigation testing, for factory inspection and daily maintenance, repair, etc. of ship generators.
Application Fields:
The ship specific water-cooled load box should be used for port terminal testing and deep-sea navigation testing, for factory inspection and daily maintenance, repair, etc. of ship generators.
Generator test resistor load box
The 1000KW generator test load box can accurately measure basic functions such as steady-state three-phase voltage, current, active power, frequency, and running time of the generator; It has a powerful voltage recording function, which can not only detect all steady-state parameters, but also detect surge, surge, voltage, current, frequency curves, as well as voltage and current harmonic curves and harmonic content.
Crowbar resistor for wind power converter
The Crowbar resistor of wind power inverters is mainly used in the low-voltage ride through technology of wind power inverters.
Application field: Used for bypass rotor side converters
Performance characteristics: Grid type trial production, small size, strong short-term impact energy
Product Introduction:
The Crowbar resistor of wind power inverters is mainly used in the low-voltage ride through technology of wind power inverters. It is used on the rotor side of wind turbines to bypass the rotor side converter. When there is a low voltage disturbance in the power grid, prevent the DC bus voltage from being too high and the rotor current from being too large. Mainly works in a fault state. Crowbar resistors can dissipate 80% of massive energy in an instant. Generally, CROWBAR is designed with a small resistor to protect the inverter components from amplifying current during power grid faults. In addition, the low voltage ride through function of the fan is also implemented in CROWBAR. Mainly used in the field of wind power generation for the release of large energy at the moment of low voltage ride through.
Crowbar resistor
Crowbar resistors are mainly used in low-voltage ride through technology for wind power inverters.
Application areas:
Low voltage ride through technology for wind power inverters
Performance characteristics:
High quality nickel chromium alloy resistor material, strong heat dissipation, can withstand continuous impact.
Product Introduction:
Crowbar resistors are mainly used in low-voltage ride through technology for wind power inverters. It is used on the rotor side of wind turbines to bypass the rotor side converter. When there is a low voltage disturbance in the power grid, prevent the DC bus voltage from being too high and the rotor current from being too large. Mainly works in a fault state. Crowbar resistors can dissipate 80% of massive energy in an instant. Generally, CROWBAR is designed with a small resistor to protect the inverter components from amplifying current during power grid faults. In addition, the low voltage ride through function of the fan is also implemented in CROWBAR. Mainly used in the field of wind power generation for the release of large energy at the moment of low voltage ride through.
3. The Crowbar resistor adopts a grid type trial production, with a small volume and strong short-term impact energy.
Ceramic grounding resistor
Grounding resistor is a new type of resistor product in the power system. With the rapid increase of grid load, the capacitor current increases sharply. When the capacitor current exceeds the specified value, intermittent arc grounding overvoltage may occur. The product is connected between the neutral point of the power system and the ground. When a grounding fault occurs in the system, the resistor will limit the fault current and cut off the faulty line or issue a fault alarm signal through the transformed current signal. At the same time, the system is connected with resistors to avoid possible damage to the insulation of the lines and equipment, in order to reduce economic losses. The grounding resistors produced by Shanghai Zhiyou are suitable for urban distribution networks, large industrial parks, power plants, offshore platform distribution systems, large chemical enterprises, wind farms, photovoltaic power stations, etc.
Start resistor
The starting resistor is suitable for SVG STATCOM, When a flexible DC transmission system is started, it can cause damage to the power grid and equipment due to the instantaneous generation of several times the impulse current. Setting up a starting resistor can effectively reduce the starting current of equipment (transformers, motors), ensuring safe operation of the equipment. After the starting process is completed, the resistor is cut off through a bypass switch. For systems with rectifier components in the backend, the starting resistor can limit the charging current of the DC energy storage capacitor for submodules in the power grid, protecting the converter valve and related equipment from high current stress and energy impact caused by high current changes, ensuring equipment safety.
The starting resistor can be made of metal and ceramic resistor components. Our company has selected HVR International LTD, an internationally renowned ceramic resistor manufacturer with a hundred years of production history, which has the characteristics of small size and strong resistance to high current impact energy.
Charge discharge resistor
A charging and discharging resistor is a resistor used to discharge a capacitor after charging, and is usually connected in parallel with the capacitor. When the power supply fluctuates, the capacitor will charge and discharge accordingly. If no charging and discharging resistor is set, the discharge current will start from one end of the capacitor and return to the other end of the capacitor through the working circuit, which seriously interferes with the stable operation of the circuit and may damage the capacitor and other ancillary equipment. Setting a charging and discharging resistor, through which the charging and discharging current flows, can avoid the above-mentioned problems. This type of product uses intelligent control technology to switch resistors, making the resistor switch more accurate, reasonable, and stable during the discharge process.
The discharge resistor for supercapacitors in rail transit can be flexibly adjusted for discharge time through a switch, with a small size and maintenance free.
Charging and discharging resistors can generally use metal and ceramic resistor elements, especially ceramic resistors have the characteristics of small volume and strong resistance to high current impact energy.
Damping resistor
In the high-voltage series compensation system, damping resistors are used in conjunction with devices such as gaps and reactors to discharge residual energy from capacitors. The resistors are required to have high voltage resistance, low inductance, and large thermal capacity. In addition, damping resistors are also required to limit current and absorb energy during the charging and discharging of capacitors in many power transmission, distribution, and power electronics systems.
Series compensated damping resistors are generally composed of linear and nonlinear parts, with HVR resistor components used for the linear part in China.
Our company closely cooperates with the Electric Power Research Institute, NARI, Rongxin, Guirong and other units to design and produce series compensated damping resistors, which have been reliably operated in many power transmission and distribution systems for a long time.
Load resistor
Load resistors are used for various testing applications in the shipbuilding industry, such as vehicle acceptance, parking test, load test, navigation test, generator set factory test, static voltage regulation characteristic test, overload protection test, reverse power and reverse current protection test, and parallel operation test.
The measurement and control method of this product can be achieved through manual buttons PLC, Remote touch screens, industrial control microcomputers, and other devices are used for intelligent measurement and control. Specialized measurement and control software is used for load control and data processing, automatically collecting, saving, and managing various electrical parameter data, and generating various tables, curves, and standard testing reports. The protection functions include overvoltage and overload protection, short circuit protection, overcurrent protection, over temperature protection, wind pressure protection, emergency stop device, etc. There are two cooling methods available: natural cooling and forced air cooling. The outer box structure is available in portable/movable/fixed/containerized options.
HVR resistor
HVR INTERNATIONAL LTD, formerly known as Morgan Stanley in the UK, has been producing the world's leading high-voltage high-energy ceramic resistors in Jarrow, England since 1963, replacing metal resistors as opening and closing resistors for ultra-high voltage switches. HVR resistors are renowned for their large thermal capacity, high voltage resistance, and low temperature rise. Their short-term heat absorption capacity can reach 600J/cm ³, and they are widely used in high-voltage switchgear (GIS), wind power converters, vehicles, radar, lasers, and other fields.
The leading technological advantages of HVR resistors, combined with Shanghai Zhiyou's years of experience in the power industry, provide Chinese customers with more comprehensive and effective solutions. Up to now, scientific research institutions such as the Chinese Academy of Sciences, Tsinghua University, Xi'an Jiaotong University, Huazhong University of Science and Technology, China Academy of Engineering Physics, State Grid Global Energy Internet Research Institute and other scientific research institutions have used HVR resistance products in a large number of national key scientific research projects, which are used for high-voltage triggering, synchronization, energy release, reverse peak, matching, continuous current, charging and other applications of accelerators, power supplies, high-power converters, with reliable performance and maintenance free operation.
Shanghai Zhiyou Company is not only a leading enterprise in the industry of resistors, but also a professional manufacturer of reactors.
Technical Features
Fault current: 1~5000A
System voltage: 0.38kV~110kV (3 kV, 6 kV, 10 kV, 35 kV)
Heating time: 5 seconds, 10 seconds, 30 seconds, 60 seconds, continuous
Resistance (20 ºC): 0.01-1500 Ω
Temperature rise: Short term temperature rise (maximum not exceeding 760 ºC within 10-60 seconds)
Continuous temperature rise: maximum not exceeding 385 ºC
Maintenance free, quick and convenient disassembly and replacement
Compact structure, easy to install
Shell protection level: IP20~IP56
[Optional Accessories]
Intelligent monitoring device that can monitor current, temperature, and fault frequency
Isolating switch
Current transformer, voltage transformer
Temperature and humidity controller and heater
Lighting inside the cabinet
Application Environment
The use environment of neutral point grounding resistor shall comply with the provisions of DL/T593-2006 3.1
1. Indoor:
Surrounding air temperature:+ 40ºC- -15ºC
Altitude: 1000m, 3000m
Minimum nominal creepage distance: ceramic material not less than 18mm/kV, organic material not less than 20mm/Kv
2. Outdoor:
Surrounding air temperature:+ 40ºC- -35ºC
Altitude: 1000m, 3000m
Minimum nominal creepage distance: Class II 20mm/kV
Grade III 25mm/kV
Grade IV 31mm/kV
Ultra high voltage DC filter resistor
| S/N | Project | Unit | Technical Parameter |
| 1 | Rated resistance value | ohm | 500 |
| 1.1 | Resistance deviation under normal operating current | % | ±5 |
| 1.2 | Maximum deviation | % | ±10 |
| 2 | Resonant frequency | Hz | 1200/1800 |
| 3 | Inductance value at resonant frequency | mH | <1 |
| 4 | Rated current | ||
| 4.1 | Maximum continuous operating current | Arms | 30.92 |
| Main harmonics | n/Arms | 23/21.75 | |
| 25/16.93 | |||
| 35/10.38 | |||
| 37/4.99 | |||
| 17/3.83 | |||
| 49/3.53 | |||
| 47/3.30 | |||
| 15/2.04 | |||
| 7/2.03 | |||
| 1/2.00 | |||
| 4.2 | Temporary current | ||
| 4.2.1 | Maximum temporary current, 20 minutes | Arms | 31.42 |
| 4.2.2 | Maximum temporary current, 0 minutes | Arms | 38.83 |
| 4.3 | Normal operating current | Arms | ≈0.7*ICont |
| 4.4 | Minimum current | Arms | 0 |
| 5 | Transient current | kA crest | 1.789 |
| Time | s | 10 | |
| 6 | Impact energy | kJ | 813.096 |
| Time | ms | 10 | |
| 7 | Lightning wave tolerance level | ||
| High voltage terminal | kV crest | 685 | |
| Between two ends | kV crest | 685 | |
| Low voltage end | kV crest | 125 | |
| 8 | Operational wave tolerance level | ||
| Between two ends | kV crest | 520 | |
| 9 | Creepage distance | ||
| 9.1 | Voltage for creepage distance calculation | ||
| High voltage terminal | kV rms | 9.27 | |
| Between two ends | kV rms | 9.27- | |
| Low voltage end | kV rms | ||
| 9.2 | Minimum creepage distance | Mm/kV | 47 |
| 10 | Power frequency withstand voltage | kV rms | 230 |
| 11 | Operating cycle | / | Permanent |
| 12 | Cooling method | / | Natural air cooling |
| 13 | Installation method | / | Second floor installation |
| 14 | Weight | Kg | About 1500 kilograms per box |
| 15 | External dimensions | mm | Length * Width * Height |
| 16 | Box protection level | / | IP20~IP56 |
| 17 | Grounding | / | The box is live and cannot be grounded |
Shanghai Zhiyou Electric Manufacturing Co., Ltd. has obtained ISO9001 international quality management system certification, ISO14001 international environmental management system certification, and EU CE certification, and has independent patents and trademarks. All products have passed the testing and certification of Chinese national authoritative institutions, and have obtained type test certificates. Corporate honor, awarded as a "Famous Brand in China" and "Top 10 Enterprises in China's Reactor Industry" by the authoritative organization China Enterprise Quality Certification and Supervision Center.
Shanghai Zhiyou Electric Manufacturing Co., Ltd., established in 2007, is a professional manufacturer of power plant resistors in China and a leading large-scale manufacturer of resistors in China. It specializes in the production of resistors, and its products are widely used in power transmission and distribution, various power stations, etc. The company is located in Shanghai, the economic center of China, an international metropolis. It has standardized production workshops and the most advanced resistor production and manufacturing technology today. Shanghai Zhiyou has obtained ISO9001 international quality management system certification, ISO14001 international environmental management system certification, and EU CE certification, and has independent patents and trademarks. All products have passed the testing and certification of Chinese national authoritative institutions, and have obtained type test certificates. Corporate honor, awarded as a "Famous Brand in China" and "Top 10 Enterprises in China's Resistor Industry" by the authoritative organization China Enterprise Quality Certification and Supervision Center. The quality of the products produced by the company is reliable, and the product standards are in line with or higher than the Chinese national standards and international general standards. They are highly praised by the Chinese and international markets.
The company continuously learns and introduces the latest and most advanced manufacturing technology and design concepts from both domestic and international sources, with a comprehensive quality system, strict raw material and product quality inspection, and high-quality pre-sales and after-sales services, effectively ensuring product quality and reliability. It provides customers with high-quality products, establishes customers' confidence in the Shanghai Zhiyou brand, and enjoys a good reputation in both domestic and foreign markets.
Shanghai Zhiyou Company, the famous brand in China's resistor industry, will do our best to provide our customers with the most reasonable resistor prices, high-quality services, and detailed technical support.
Shanghai Zhiyou Electric Manufacturing Co., Ltd. is currently seeking globally trusted partners as our agents in various regions. If you trust our products, please contact us through Made in China website or directly by email. We will reply to you as soon as we receive the information.
Our Best Service For You
1. Pre sale service
a. make technical solution
b. send quotation, technical data sheet and drawing
c. prepare power resistor plan, testing plan and shipment plan
2. In sale service
a. supervise the manufacturing schedule totally in accordance with the plan
b. send photos to customer during every manufacturing process(hold point)
c. inform the customer one week before testing.
3. After sale service
a. installation and commissioning, training the workers
b. quick response within 12 hours any time
c. provide 12 months guarantee period normally.
Q1: Are you a factory or trading company?
A1: We are a factory, and we can guarantee our price is first-hand very cheap and competitive. Our factory is in Shanghai, the international metropolis of China.
Q2: What is the payment term?
A2: T/T, L/C or negotiation.We accept T/T 30% deposit and 70% balance payment, the balance should be paid after acceptance before shipment.
Q3: Do you have any Certificate?
A3: Yes. Our resistors have CE certificates, type test reports tested by national authoritative institutions, and certificates of conformity.
Q4: Could I have the prices of your products?
A4: Welcome. Please feel free to send us an inquiry here. We will reply to you within 24 hours.
Q5: How about the delivery time?
A5: My friends, when you confirm the order, there will be about 25 to 45 days to produce which depends on your delivery plan and our order arrangements.
Q6: May I know the warranty time?
A6. We offer 12 months warranty time for the resistor quality. For any questions about our products, you can consult our sales manager any time and anywhere. We will provide the professional assistance to you.
Q7: Do you accept product customization?
A7: Yes of course. Please provide specific drawings or parameters we will quote you after evaluation.
Q8: Would you accept using customer's logo?
A8: Yes, we can provide OEM and ODM service.
Q9: What is the standard of package?
A9: Export standard package or special package according to customer's requirement.
Q10: How can we trust you?
A10: As an enterprise specializing in resistor production for 17 years, Shanghai Zhiyou Electric has high quality, fast delivery, guarantee after-sales service and factory price.We have more than 17 years manufacturing and R&D experience, and cooperated with many customers all over the world. We have many patent certificates, test report, ISO9001, ISO14000 certificate. We are the audited supplier of Made-In-China.
Q11: How do you conduct quality control in your factory?
A11: Shanghai Zhiyou Electric resistors are manufactured in accordance with international standards (such as IEC, SGS, Intertek, CE and other international certifications) and customer requirements . All resistors are 100% conducted routine test, type test and special test before delivery to ensure every product is qualified.
Q12: I have great trust in Shanghai Zhiyou's resistor products and would like to become your company's general agent in our country. How can I proceed?
A12: Thank you for your recognition of Shanghai Zhiyou Company's products. Shanghai Zhiyou Electric Manufacturing Co., Ltd. is currently seeking globally trusted partners as our agents in various regions. Please contact us through Made in China website or directly by email. We will reply to you as soon as we receive the information
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