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Anqiang Power presents its high-performance Oil Immersed Electromagnetic Voltage Transformer designed for reliable metering and protection in medium and high-voltage power systems. The JDX series is engineered for 66KV, 110KV, and 220KV networks, supporting stable operation in substations, transmission lines, and industrial distribution systems. Its internal insulation system adopts a graded capacitive structure to ensure uniform electric field distribution and long-term operational stability under demanding grid conditions.
This product is widely used in power transmission environments where accurate voltage measurement and system protection are required. With optimized oil insulation design and reinforced mechanical structure, the unit ensures consistent performance even under fluctuating load and environmental stress.
The Oil Immersed Electromagnetic Voltage Transformer adopts a sealed oil tank structure combined with a stainless steel expansion system to maintain stable internal pressure. The oil level can be visually monitored through a dedicated inspection window, which helps operators quickly assess working conditions without disassembly.
Key exposed metal components are treated with hot-dip galvanizing and powder coating to enhance corrosion resistance. The secondary terminals are arranged in a layered configuration, separating metering and protection windings to reduce interference and improve measurement accuracy.
Electrical performance parameters of JDX series for different voltage levels:
| Rated primary voltage (kV) | 66/69 | 110/115 | 132/138 | 150 | 220/230 | ||
| Maximum equipment voltage (kV) | 72.5 | 123/126 | 145 | 325 | 460 | ||
| Rated frequency (Hz) | 50/60 | ||||||
| Rated power frequency withstand voltage (kV) | 140/160 | 230 | 275 | 750 | 1050 | ||
| Rated lightning impulse withstand voltage (kV) | 325/350 | 550 | 650 | 1500 | 2100 | ||
| Arc flash distance | 780 | 1050 | 1300 | ||||
| Mechanical load (N) | 1250 | 1250 | 1250 | 1250 | 1250 | ||
| Secondary terminal markings | 1a-1n | 2a-2n | da-dn | ||||
| Accuracy level | 0.2 | 0.5 | 3P | ||||
| Rated output (VA) | 100 | 250 | 300 | ||||
| 150 | 150 | 300 | |||||
| 150 | — | 300 | |||||
| Thermal limit output (VA) | 2000 | ||||||
| Rated voltage factor |
1.2/Continuous；1.9/8h(66KV) 1.2/Continuous；1.5/30s(110-230KV) |
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In modern power systems, the Oil Immersed Electromagnetic Voltage Transformer is typically deployed in outdoor substations, transmission corridors, and high-voltage distribution stations. It supports precise voltage measurement for revenue metering and relay protection, ensuring stable grid operation under complex load conditions.
The design is particularly suitable for environments requiring high insulation reliability, such as utility substations, industrial power plants, and regional power networks.
| Number | Name |
| 1 | Expander |
| 2 | Oil level inspection window |
| 3 | Single terminal |
| 4 | Porcelain sleeve |
| 5 | Raised seat |
| 6 | Tank |
| 7 | Secondary junction box |
| 8 | Nameplate |
| 9 | Secondary outlet hole |
| 10 | Grounding plate |
| 11 | Oil drain valve |
Before commissioning, ensure correct grounding and verify secondary wiring polarity. The transformer should be installed on a stable foundation with sufficient clearance to maintain insulation distance and safe operation. Routine inspection of oil level and sealing condition is recommended during long-term operation.
Q1: What systems is this voltage transformer suitable for?
A: It is commonly used in 66KV to 220KV power transmission and distribution systems for measurement and protection.
Q2: Can it be used outdoors?
A: Yes, the structure is designed for outdoor substations with anti-corrosion and sealed insulation performance.
Q3: What is the maintenance requirement?
A: Regular oil level inspection and terminal tightening are recommended for stable long-term operation.
Q4: Does it support different accuracy classes?
A: Yes, multiple accuracy combinations are available for metering and protection applications.
Q5: How is insulation performance ensured?
A: The unit uses oil insulation with capacitive grading to maintain uniform electric field distribution.
Q6: What is the service life?
A: Under normal operating conditions, it supports long-term service with minimal degradation.
Address
Building 3, Yueqing Digital Intelligent Economy Electrical Industrial Park, Liushi Town, Yueqing City, Wenzhou, Zhejiang Province, China
