产品概述
JDZX(F)9-35电压互感器 这是一种全封闭、环氧树脂浇注、干式电压互感器，专为 35 千伏交流电力系统设计，最高系统电压为 40.5 千伏，适用于室内使用。
该变压器配备有残压绕组，并采用一体化高爬电、耐污绝缘设计。它提供电压测量、电能计量、继电保护和绝缘监测功能。
F型模型还可以用作电容器组的放电线圈。该产品广泛应用于35千伏户内中压 switchgear箱式变电站、开关站、无功功率补偿设备及其他配电系统。特别适用于中性点非有效接地的中性点35千伏系统的绝缘监测。
产品特点
绝缘与电气性能
- 专为35千伏系统设计：
该变压器专为 35 千伏电力系统设计，最高运行电压为 40.5 千伏。它能够承受 35 千伏中压配电系统所需的规定工频和雷电冲击耐受电压试验。 - Fully enclosed epoxy resin cast insulation:
变压器采用环氧树脂真空浇注工艺整体成型。固体绝缘体内部不含气隙，具有优异的介电性能。 - Low partial discharge:
Partial discharge is limited to no more than 10 pC, helping reduce insulation ageing and improve long-term operational reliability. - Oil-free dry-type construction:
该产品不含绝缘油，消除了漏油、油污染和与油相关的火灾隐患。 - High pollution-flashover resistance:
高压侧采用多伞裙绝缘结构，显著增加了爬电距离，提高了在潮湿或污染室内环境下的耐表面闪络能力。 - 多功能绕组配置
内置残压绕组提供100/3 V输出，用于系统接地故障检测和绝缘监测。适用于三相五柱式电压互感器连接方式。 - 多种电压比和精度等级
提供标准电压比，例如 35/0.1/0.1/3 kV。可提供高达 0.2 级的计量精度等级，而 3P 和 6P 等保护精度等级可定制。 - 电容器组放电功能
F型模型能够满足电容器组放电线圈的电气参数要求，同时还提供电压测量和监测功能。
结构和安装特点
- Fully enclosed dry-type structure:
磁芯、绕组和带电部件均封装在环氧树脂浇注体中。该产品提供 IP20 防护等级，不含绝缘油。 - 紧凑设计
紧凑的结构兼容标准 35 kV 开关设备安装尺寸，并支持节省空间的柜体布局。 - 集成多功能设计
F型模型结合了电压互感器和电容器组放电线圈的功能。它可以同时提供电压监测和释放电容器组的残余电荷。 - 降低设备要求
集成化设计减少了开关柜内部所需独立组件的数量，节省了安装空间并降低了系统成本。 - Clearly identified secondary terminals:
二次端子由透明盖板保护，并清晰标记，方便接线。计量、保护和剩余电压回路可分开连接。 - Secure bolt mounting:
The metal base is provided with mounting holes for horizontal bolt installation inside indoor switchgear. The structure provides reliable mechanical stability and vibration resistance.
操作与维护特性
- Low-maintenance operation:
干式无油设计消除了泄漏和油相关的火灾风险。环氧树脂外壳提供高机械强度、抗冲击性和耐老化性。 - 减少维护点
F型模型无需单独的电容器组放电线圈，减少了需要检查和维护的组件数量。 - Wide operating temperature range:
变压器可在-30°C至+70°C的环境温度下运行。环氧树脂在高低温条件下均能保持稳定的机械和绝缘性能。 - High-reliability construction:
磁芯由优质叠片硅钢片制成，而绕组则用漆包铜线绕制。 - Low operating losses:
优化的磁芯和绕组设计可实现低损耗、有限的温升和稳定的测量精度。 - Overvoltage withstand capability:
该产品可承受其规定绝缘水平内的开关和雷电过电压，确保计量、保护和绝缘监测信号的可靠性。
技术规格
电气参数
| 参数 | 规格 |
|---|---|
| 适用系统电压 | 35 kV AC, Um = 40.5 kV |
| 额定频率 | 50 赫兹 |
| Rated Primary Voltage | 35千伏 |
| Rated Secondary Voltage | 100 V 用于计量和保护；100/3 V 用于残压和绝缘监测 |
| Metering Accuracy Class | 0.2 / 0.5 / 1 等级 |
| Protection Accuracy Class | 3P / 6P |
| 工频耐压 | 95 kV for 1 minute at the high-voltage terminal, without breakdown |
| 雷电冲击耐受电压 | 185 kV peak, without breakdown |
| 局部放电 | ≤10 pC |
| 绝缘电阻 | ≥1,000 MΩ between high voltage, low voltage, 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 Series | Instrument Transformers |
| DL/T 653 | 用于并联电容器分流线圈订购的技术规格，适用于 F 型号 |
应用
适用电压等级
JDZX(F)9-35型电压互感器适用于35kV、最高系统电压为40.5kV的户内交流电力系统中。
Typical Applications
- Voltage measurement, energy metering, and relay protection in indoor 35 kV medium-voltage switchgear
- Voltage monitoring in box-type substations
- 35千伏配电系统在开关站
- Power distribution systems in industrial and mining facilities
- Commercial buildings and industrial parks
- 非有效接地中性点系统中的绝缘监测
- 三相五柱式电压互感器接线方式
- Indoor distribution environments requiring enhanced resistance to humidity and pollution flashover
- 无功功率补偿设备和采用F型型号的电容器组
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.
残压绕组为非有效接地系统中接地故障检测和绝缘监测提供信号。
F型模型还可以排出电容器组的剩余电能，提高检查和维护期间的安全性。
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:
检查电压互感器，确认浇注体无裂纹、气泡、机械损伤及其他可见缺陷。检查所有端子标记清晰，所供附件齐全。核实型号、电压比、准确度等级等技术参数与系统设计要求相符。对于F型型号，确认放电功能参数符合无功功率补偿设备的要求。 - 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。在高压导体、接地部件和其他带电部件之间保持足够的电气间隙，以防止放电。F型模型还必须根据适用的电容器组放电线圈接线要求进行连接。 - Low-voltage-side connection:
按照标记连接二次侧端子。计量、保护和残压回路必须分开正确接线。二次回路在运行期间不得短路。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:- High voltage and low voltage
- High voltage and earth
- Low voltage and earth
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.
- 检查绝缘棚是否有积尘或污染物。
- 定期检查高压和低压线路，确保所有连接牢固，没有过热或变色的迹象。
- Confirm that the secondary-circuit earthing remains reliable.
- Periodically test the insulation resistance and voltage ratio to verify that the metering and protection accuracy remain within the specified limits.
- 检查剩余电压回路和绝缘监测功能。
- 对于 F 型号，应定期测试电容器组的放电功能及相关的电气参数。
- Clean dust and contamination from the transformer surface and insulating sheds.
- Prevent oil and corrosive substances from contacting the epoxy resin body.
- 如果检测到开裂、电击、过热、电压比误差过大或功能失效，请立即断电并检查设备。必要时更换变压器。
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风险。维护期间，必须断开变压器电源，并按照适用规程安全地隔离和接地二次回路。
- Avoid impact or collision with the epoxy resin body, high-voltage terminals, and insulating sheds during transportation and installation. Mechanical damage may reduce insulation performance and pollution-flashover resistance.
- 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。
- F型模型必须按照电压互感器和电容器组放电线圈的接线要求进行连接。
- 设备必须可靠接地。金属底座上的接地端子必须牢固连接到开关设备的接地母线上。
- 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 | JDZX(F)9-35 voltage transformer | 电压变换、电气隔离、绝缘监测和F型电容器组放电的主设备 |
| 2 | 安装螺栓和垫圈 | Used to secure the voltage transformer during installation |
| 3 | 透明副端子盖 | Protects the secondary terminals and helps prevent incorrect connection or short circuits |
| 4 | Product Instruction Manual | 提供安装、操作、维护和 F 型排放功能指南 |
| 5 | Product Certificate and Factory Test Report | 提供产品质量和性能文件，包括电压比、精度和F型放电功能测试数据。 |
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
- DL/T 653 用于并联电容器放电线圈的订购技术规格适用于 F 型号
The product has passed the applicable type tests, and its performance meets the operating requirements of indoor 35 kV power systems.
