产品概述
JDZC-3、JDZC-6 和 JDZC-10 电压互感器 全封闭干式浇注式电压互感器，专为室内 3 kV、6 kV 和 10 kV 交流电力系统设计，最高系统电压为 12 kV。
变压器采用整体环氧树脂浇注绝缘结构。磁芯采用优质叠片硅钢片，绕组采用漆包铜线。它们具有优良的绝缘性能、可靠的运行、稳定的精度特性以及强大的抗污闪能力。
这些产品主要用于电压测量、电能计量、继电保护和绝缘监测。典型应用包括室内中压 switchgear箱式变电站、配电站及其他配电设施。
产品特点
绝缘与电气性能
- Fully enclosed epoxy resin cast insulation:
变压器采用环氧树脂真空浇注整体成型工艺。固体绝缘主体内部无气隙，介电性能优异。能够满足相应电力系统的工作电压、工频耐受电压和雷电冲击耐受电压的要求。 - Oil-free dry-type construction:
该产品不含绝缘油，消除了油浸式设备相关的漏油、油污染和火灾风险。适用于现代室内无油配电系统。 - Multiple voltage ratings:
型号适用于 3 kV、6 kV 和 10 kV 系统。可根据系统要求配置 10/0.1 kV 和 6/0.1 kV 等电压比。 - Multiple accuracy classes:
Metering accuracy classes of 0.2, 0.5, and 1 and protection accuracy classes of 3P and 6P are available for metering, protection, and insulation-monitoring applications. - High pollution-flashover resistance:
高压端子采用伞型绝缘结构，增加了爬电距离，提高了在污染室内环境下的抗表面闪络能力。 - Low partial discharge:
The advanced casting process limits partial discharge to no more than 10 pC, helping reduce insulation ageing and improve long-term operating reliability.
结构和安装特点
- Fully enclosed dry-type structure:
一体式压铸结构封装了磁芯、绕组和带电部件。它提供了 IP20 防护等级和紧凑的结构，安装空间极小。 - Modular design:
标准化的安装尺寸简化了开关柜内的安装，并支持批量更换和例行维护。 - Clearly identified terminals:
高压端子有清晰的标记，而低压端子则由接线盒盖保护。这种设计简化了接线，并有助于防止接线错误和意外的二次短路。 - Flexible installation:
The metal base includes mounting holes for secure bolt installation. The transformer can be installed horizontally or vertically inside indoor switchgear and provides reliable resistance to vibration.
操作与维护特性
- Low-maintenance operation:
干式无油设计消除了泄漏和火灾隐患。环氧树脂外壳提供高机械强度、抗冲击性和耐老化性，减少了日常维护需求。 - Wide operating temperature range:
变压器可在-30°C至+70°C的环境温度下运行。环氧树脂可保持稳定的绝缘和机械性能，不会变脆或变形。 - High operational reliability:
漆包铜绕组和优质叠片硅钢铁芯可实现低运行损耗、有限的温升和稳定的精度。 - Overvoltage withstand capability:
变压器在其规定的绝缘水平内可承受开关过电压和雷电过电压，有助于保持可靠的计量和保护信号。
技术规格
电气参数
| 参数 | 规格 |
|---|---|
| 适用系统电压 | 3 kV / 6 kV / 10 kV AC, Um = 12 kV |
| 额定频率 | 50 赫兹 |
| Rated Primary Voltage | 3 kV / 6 kV / 10 kV, customizable |
| Rated Secondary Voltage | 100 V for metering and protection; 100/3 V for optional insulation monitoring |
| Metering Accuracy Class | 0.2 / 0.5 / 1 等级 |
| Protection Accuracy Class | 3P / 6P |
| 工频耐压 | 3 kV system: 18 kV; 6 kV system: 24 kV; 10 kV system: 42 kV for 1 minute, without breakdown |
| 雷电冲击耐受电压 | 3 kV system: 40 kV; 6 kV system: 60 kV; 10 kV system: 75 kV peak, without breakdown |
| 局部放电 | ≤10 pC |
| 绝缘电阻 | ≥1,000 MΩ between the high-voltage winding, low-voltage winding, and earth |
结构和材料参数
| 参数 | 规格 |
|---|---|
| 绝缘介质 | Fully cast epoxy resin |
| 防护等级 | IP20 |
| Installation Type | 室内柱式螺栓安装 |
| 热等级 | Class B, 130°C |
环境参数
| 参数 | 规格 |
|---|---|
| Installation Altitude | ≤2,000 m; high-altitude versions available |
| 工作温度 | -30°C 至 +70°C |
| Storage Temperature | -40°C 至 +85°C |
| 相对湿度 | ≤95%, non-condensing |
适用标准
| Standard | 描述 |
|---|---|
| GB 1207 | Voltage Transformers |
| GB/T 20840.1 | Instrument Transformers—Part 1: General Requirements |
| GB/T 20840.3 | Instrument Transformers—Part 3: Additional Requirements for Inductive Voltage Transformers |
应用
Applicable Voltage Levels
适用于最高系统电压为12 kV的室内3 kV、6 kV和10 kV交流电力系统。
Typical Applications
- 户内中压开关柜的电压测量、电能计量和继电保护，包括KYN28和XGN系列设备
- Voltage monitoring in box-type substations
- 配电站的电力分配系统
- 工业和矿山企业中的 3 kV、6 kV 和 10 kV 系统
- Commercial buildings and industrial parks
- Voltage monitoring, control, and protection signal acquisition in power automation systems
- 需要增强抗污闪能力的室内配电环境
主要功能
The voltage transformer converts the system high voltage into a standardized secondary voltage, typically 100 V, at a specified ratio.
It supplies voltage signals to:
- Energy meters
- Measuring instruments
- Relay protection devices
- Monitoring equipment
- Control systems
- Insulation monitoring devices
The transformer also provides electrical isolation between the primary and secondary systems, helping protect connected equipment and operating personnel.
当配备有辅助次级绕组时，它还可以为绝缘监测和系统接地故障检测提供电压信号。
操作条件
正常运行条件
- Installation altitude: no more than 2,000 m
- Ambient temperature: -30°C to +70°C
- Severe or sudden temperature changes should be avoided
- Relative humidity: no more than 95%, non-condensing
- The environment should be free from corrosive gases
- Flammable or explosive substances are not permitted
- Severe vibration and mechanical impact should be avoided
- Significant dust and salt-spray contamination should be avoided
- Indoor post-type installation
- Direct sunlight, rain, and condensation should be avoided
Special Operating Conditions
Customized products are required for:
- Installation altitudes above 2,000 m
- Ambient temperatures outside the range of -30°C to +70°C
- Severe pollution or salt-spray environments
- Chemically corrosive environments
- Applications involving strong vibration or mechanical impact
- Non-standard voltage ratios
- Special accuracy classes
- Non-standard mounting dimensions
安装与维护
安装要求
- Pre-installation inspection:
Inspect the voltage transformer and confirm that the cast body is free from cracks, bubbles, mechanical damage, and other visible defects. Check that all terminal markings are clear and that the supplied accessories are complete. Verify that the model, specifications, voltage ratio, and accuracy class match the system design requirements. - Mounting:
Position the voltage transformer at the specified location inside the switchgear and secure it with bolts through the mounting holes in the base. Ensure that the transformer is firmly installed without looseness or displacement. The mounting surface should be level to avoid uneven mechanical stress. - High-voltage-side connection:
根据系统设计连接高压端子。确保所有连接牢固并提供可靠的电气接触。保持高压导体、接地部件和其他带电部件之间有足够的电气间隙。 - Low-voltage-side connection:
根据标记连接二次侧端子。计量、保护和绝缘监测电路必须分开正确接线。二次回路运行时不得短路。二次回路的一点必须根据系统设计和适用的电气安全要求可靠接地。 - Insulation inspection:
After installation, measure the insulation resistance between:- 高压绕组和低压绕组
- 高压绕组和接地
- 低压绕组和接地
维护要求
- Regularly inspect the epoxy resin body for cracks, mechanical damage, discharge marks, and contamination.
- Check the high-voltage terminals for looseness, oxidation, or abnormal heating.
- Inspect the insulating sheds for accumulated dust or pollution.
- Regularly check the high-voltage and low-voltage wiring to ensure that all connections remain secure and free from overheating or discoloration.
- Confirm that the secondary-circuit grounding remains reliable.
- Periodically test the insulation resistance and voltage ratio to verify that the metering and protection accuracy remain within the specified limits.
- Check the insulation-monitoring function where an auxiliary winding is provided.
- Clean dust and contamination from the transformer surface.
- Prevent oil and corrosive substances from contacting the epoxy resin body.
- If cracking, discharge, overheating, or excessive voltage-ratio error is detected, immediately de-energize and inspect the equipment. Replace the transformer where necessary.
注意事项
- 变压器带电运行时，二次绕组不得短路。二次短路可能产生过大电流，对设备和人员造成严重危险。维护期间，必须断开变压器电源，并根据需要安全地隔离和接地二次回路。
- 运输和安装过程中，避免撞击或碰撞环氧树脂本体、高压端子及绝缘子裙。机械损伤可能降低绝缘性能和耐污闪能力。
- 使用合适的绝缘导体进行高压连接。与接地部件和其他带电部件保持足够的电气间隙，以防止相间或对地放电。
- The equipment must be reliably grounded. The grounding terminal on the metal base must be securely connected to the switchgear grounding busbar.
- Store the product in a dry, ventilated, and shaded environment. Avoid direct sunlight, high temperatures, moisture, compression, and mechanical impact.
- Installation, commissioning, and maintenance must be carried out by qualified electrical personnel in accordance with applicable electrical safety procedures.
标准供应清单
| 不。 | 物品 | 功能 |
|---|---|---|
| 1 | JDZC-3、JDZC-6 或 JDZC-10 组合互感器 | Main device for voltage transformation, electrical isolation, and signal acquisition |
| 2 | 安装螺栓和垫圈 | Used to secure the voltage transformer during installation |
| 3 | 低压接线端子盖 | Protects the secondary terminals and helps prevent incorrect connection or short circuits |
| 4 | Product Instruction Manual | Provides installation, operating, maintenance, and wiring guidance |
| 5 | Product Certificate and Factory Test Report | Provides product quality and performance documentation, including voltage-ratio and accuracy test data |
Applicable Standards and Certification
The product complies with the following standards:
- GB 1207, Voltage Transformers
- GB/T 20840.1, Instrument Transformers—Part 1: General Requirements
- GB/T 20840.3, Instrument Transformers—Part 3: Additional Requirements for Inductive Voltage Transformers
该产品已通过适用的型式试验，其性能满足3千伏、6千伏和10千伏电力系统的运行要求。
