产品概述
JZZV1-10 双元组合式计量变压器 该户外环氧树脂浇注计量装置专为 10 千伏三相三线交流电力系统设计，最高系统电压为 12 千伏。
基于双元件计量配置，该装置将电压互感器和电流互感器功能集成于单一设备中。它为三相三线制系统提供电能计量、电压监测、电流信号采集和保护功能。
该产品广泛应用于户外10千伏配电线路的杆上电能计量，是户外中压配电系统的关键计量装置。
产品特点
绝缘与电气性能
- Outdoor epoxy resin cast insulation:
The complete unit is vacuum-cast using outdoor-grade epoxy resin. The solid insulation contains no internal air gaps and provides excellent dielectric performance. - Suitable for 12 kV systems:
该装置能够承受 10 kV 系统（最高系统电压为 12 kV）的工作电压、工频耐受电压和雷电冲击耐受电压要求。 - Low partial discharge:
局部放电限制在10皮库库仑（pC）以内，有助于减缓绝缘老化，提高长期运行可靠性。 - Oil-free outdoor construction:
干式变压器不含绝缘油，消除了漏油、油污染和与油相关的火灾隐患。它适用于暴露在阳光、雨水、潮湿和正常大气污染下的室外环境。 - 集成式双元件计量装置
该单元专为三相三线制系统设计。它集成了两个相电流互感器元件和电压互感器元件，用于采集三相电压和两相电流信号。 - 完整计量能力
采集到的电压和电流信号可用于电能计量、功率计算、负载监测和电气参数采集。 - Wide ratio range:
可提供10/0.1千伏的标准电压比。根据系统负载要求，电流比可配置为5/5安培至2000/5安培。 - High metering accuracy:
电流互感器精度等级最高可达0.2S，电压互感器精度等级最高可达0.2。根据应用需求，也可提供0.5和1级的精度。 - High pollution-flashover resistance:
高压侧采用多伞裙绝缘结构，具有更长的爬电距离，在潮湿和污染的室外条件下能可靠地抵抗表面闪络。
结构和安装特点
- Fully enclosed outdoor dry-type structure:
整个单元一体铸造，无外露内部带电部件。 - IP65 protection rating:
户外围栏提供 IP65 防护等级，有助于防止灰尘、雨水和湿气侵入。 - Compact integrated design:
将电压互感器和电流互感器的功能集成在一个单元中，可以减少独立设备数量，节省安装空间，并简化现场接线。 - 油浸式计量装置的替代方案：
干式结构在适用场合可替代传统的油浸式计量箱，同时消除了油维护和泄漏的风险。 - Outdoor high-voltage terminals:
The high-voltage side uses copper busbar-type terminals for convenient connection to outdoor distribution conductors. - Tin-plated terminal surfaces:
The terminal contact surfaces are tin-plated to improve resistance to oxidation and corrosion in humid outdoor environments. - Waterproof secondary terminal box:
二次接线端子安装在 IP65 防水接线盒内，以保护低压电路免受雨水和湿气的侵害。 - Clearly identified terminals:
高压端子有清晰的标识，而二次电压和电流端子则分开分组，以简化接线并降低接线错误的风险。 - Flexible installation:
该单元支持室外电线杆安装横担和室内 switchgear 安装 - High mechanical stability:
该安装结构可提供可靠的抗振动和抗风载能力，在正确安装的情况下，可承受正常的户外风、雨、雪。
操作与维护特性
- Low-maintenance operation:
干式无油结构消除了漏油、换油以及与油相关的火灾隐患。 - High mechanical strength:
The outdoor epoxy resin body provides reliable impact resistance, ageing resistance, and corrosion resistance. - Wide operating temperature range:
The unit can operate at ambient temperatures from -40°C to +70°C. The epoxy resin maintains stable insulation and mechanical properties without becoming brittle or deformed. - 适用于户外温度变化
该产品能够承受显著的季节性和昼夜温差。 - High operational reliability:
The voltage and current transformer elements use high-quality magnetic cores and winding materials, providing low operating losses and limited temperature rise. - Stable long-term accuracy:
The unit is designed to maintain stable metering performance with minimal accuracy drift during long-term operation. - Overvoltage withstand capability:
The product can withstand switching and lightning overvoltages within its specified insulation level.
技术规格
电气参数
| 参数 | 规格 |
|---|---|
| 适用系统电压 | 10 kV AC, Um = 12 kV |
| 额定频率 | 50 赫兹 |
| Voltage Ratio | 10/0.1 kV, customizable |
| Current Ratio | 5/5 A to 2,000/5 A, customizable |
| Voltage Transformer Accuracy Class | 0.2 / 0.5 / 1 等级 |
| Current Transformer Accuracy Class | 0.2S / 0.5S / 0.5 级 |
| 工频耐压 | 42 kV for 1 minute at the high-voltage terminal, without breakdown |
| 雷电冲击耐受电压 | 75 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 outdoor-grade epoxy resin |
| 防护等级 | IP65 |
| Installation Type | Outdoor pole-mounted crossarm installation or indoor switchgear installation |
| 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 | -40°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 1208 | Current Transformers |
| GB/T 17215 | Electricity Metering Equipment |
| DL/T 448 | Technical Administrative Code for Electric Energy Metering |
应用
Applicable Power System
JZZV1-10组合式计量互感器适用于额定电压10kV、最高系统电压12kV的三相三线交流电力系统。
Typical Applications
- Pole-mounted energy metering on outdoor 10 kV distribution lines
- Energy metering and load monitoring in indoor medium-voltage switchgear
- Box-type substations
- Switching and distribution stations
- 10 kV distribution systems in industrial and mining enterprises
- Commercial buildings and industrial parks
- Energy data acquisition in power automation systems
- Power monitoring, control, and load management systems
主要功能
The combined metering transformer converts the system high voltage and primary current into standardized secondary signals:
- Secondary voltage: 100 V
- Secondary current: 5 A
这些信号可提供给：
- 三相三线电能表
- Metering instruments
- Load-monitoring equipment
- Power data acquisition devices
- Energy management systems
- Power automation equipment
The unit supports:
- 能源计量
- 功率计算
- Load monitoring
- Electrical parameter acquisition
- Energy consumption analysis
- Power management
它还提供了初级电源系统和次级计量电路之间的电气隔离，有助于确保连接的计量和监测设备的运行安全。
操作条件
正常运行条件
- Installation altitude: no more than 2,000 m
- Ambient temperature: -40°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
- 室外机可承受正常的日晒、雨淋、霜冻和风吹。
- Outdoor pole-mounted crossarm or indoor switchgear installation
- Severe corrosion, salt spray, and heavy sand or dust conditions should be avoided unless a customized version is used
Special Operating Conditions
Customized products are required for:
- Installation altitudes above 2,000 m
- Ambient temperatures outside the range of -40°C to +70°C
- Severe pollution or salt-spray environments
- Chemically corrosive environments
- Strong wind or severe sand and dust conditions
- High-intensity ultraviolet exposure
- Non-standard voltage ratios
- Non-standard current ratios
- Special mounting dimensions
安装与维护
安装要求
- Pre-installation inspection:
Inspect the combined metering transformer and confirm that the epoxy resin 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, current ratio, and metering accuracy classes match the system design requirements. - Mounting:
Select a suitable crossarm and mounting bracket according to the installation arrangement. Secure the metering transformer in the specified position and confirm that there is no looseness, displacement, or uneven mechanical loading. The mounting surface should be level. Outdoor pole-mounted installations must meet the applicable wind-load and anti-overturning requirements. - High-voltage-side connection:
根据系统设计连接高压端子。确保所有连接都已牢固拧紧并提供可靠的电气接触。保持高压导体、接地元件和其他带电部件之间有足够的电气间隙。户外连接必须防止水分侵入和腐蚀。在需要的地方，应在端子接触面上涂抹导电膏，以减少氧化。 - Secondary-side connection:
Connect the voltage and current secondary terminals to the energy meter according to their markings. The current transformer secondary circuits must never be left open while the primary system is energized. The voltage transformer secondary circuits must never be short-circuited. The current secondary circuits must be reliably earthed at one point in accordance with the system design and applicable electrical safety requirements. Ensure that the waterproof secondary terminal box is correctly closed and sealed after wiring. - 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, corrosion, and abnormal heating.
- Inspect the waterproofing and corrosion protection of outdoor connections.
- Confirm that the secondary terminal box remains properly sealed.
- Regularly inspect high-voltage and low-voltage connections for looseness, overheating, and discoloration.
- Confirm that the current secondary circuits remain correctly connected and reliably earthed.
- Periodically verify the metering accuracy and compare the energy meter readings with the specified error limits of the combined metering transformer.
- Periodically test the insulation resistance and confirm that the insulation performance remains within the specified requirements.
- Clean dust and contamination from the product surface.
- Regularly clean the insulating sheds to reduce the risk of pollution flashover.
- Prevent oil and corrosive substances from contacting the epoxy resin body.
- If cracking, electrical discharge, overheating, or excessive metering error is detected, immediately de-energize and inspect the equipment. Replace the unit where necessary.
注意事项
- The current transformer secondary circuits must never be left open while the primary system is energized. The voltage transformer secondary circuits must never be short-circuited. Either condition may produce hazardous overvoltage or overcurrent and create a serious risk to equipment and personnel.
- During maintenance, the current secondary circuits must be securely short-circuited and earthed before disconnection. The voltage secondary circuits must be safely isolated before work begins.
- Avoid impact or collision with the epoxy resin body and high-voltage terminals during transportation and installation. Mechanical damage may reduce insulation performance and pollution-flashover resistance.
- Use suitable insulated conductors for high-voltage connections. Maintain adequate electrical clearance from earthed components and other live parts to prevent phase-to-phase or phase-to-earth discharge.
- Confirm the correct phase sequence during three-phase wiring. Incorrect phase connections may affect metering accuracy.
- The equipment must be reliably earthed. The grounding terminal on the base must be securely connected to the grounding busbar.
- 户外安装必须符合适用的防雷和接地要求。
- Outdoor connections must be properly protected against rainwater ingress and corrosion.
- 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.
- 组合式计量变压器在投入使用前，必须经过当地计量部门的检定，如果需要的话。
标准供应清单
| 不。 | 物品 | 功能 |
|---|---|---|
| 1 | JZZV1-10户外双组合式计量互感器 | 电压和电流变换、电气隔离和电能计量的主设备 |
| 2 | Mounting Brackets, Bolts, and Washers | Used to secure the metering transformer during installation |
| 3 | Secondary Terminal Box and Terminal Cover | Protect the low-voltage terminals against incorrect connection, short circuits, and water ingress |
| 4 | Product Instruction Manual | Provides installation, operation, maintenance, wiring, and outdoor mounting guidance |
| 5 | Product Certificate, Factory Test Report, and Metrological Verification Certificate | Provide product quality and performance documentation, including voltage-ratio, current-ratio, and accuracy test data |
Applicable Standards and Certification
The product complies with the following standards:
- GB 1207, Voltage Transformers
- GB 1208, Current Transformers
- GB/T 17215, Electricity Metering Equipment
- DL/T 448, Technical Administrative Code for Electric Energy Metering
该产品已通过适用的型式试验和计量检定，其性能满足10千伏三相三线制电力系统的电能计量要求。
