High-Quality ZGS□-12 Combined Transformer

YBWF/G-40.5/0.69 Wind Power Transformer/Photovoltaic Power Transformer

SCB□ series 6-10kV Dry-Type Power Transformer

S□ series 6-10kV Oil-Immersed Power Transformer

Indoor high voltage vacuum circuit breaker series

XGN15-12 Box-type Fixed Ring Main Unit Switchgear

TRXGN-12 Air (Environmentally Friendly Gas) Insulated Ring Main Unit

MNS Low-Voltage Withdrawable Switchgear

Cable Branch Box with SF6 Load Switch

35kV European-style cable branch box

EVTLW34-10 High-Precision Zero Sequence Voltage Sensor.jpg

High-Precision EVT/LW34-10 Zero Sequence Voltage Sensor from China Suppliers - Reliable Factory Solution for 10kV Systems

The EVT/LW34-10 Zero Sequence Voltage Sensor is a premium device specifically designed for accurate voltage monitoring in 10kV power systems. Manufactured in China, this high-performance sensor provides dual outputs: a 3.25V/√3 phase sequence signal and a 6.5V/3 zero sequence signal, achieving impressive accuracies of 0.5 class and Level With its strong insulation rated at 12/42/75kV and minimal partial discharge of ≤10pC, this sensor is engineered to ensure dependable performance. Its 2MΩ load capacity enables seamless integration into digital protection and measurement systems. As a leading supplier and factory in the market, we guarantee reliable solutions for all your voltage monitoring needs.

Product Details

Product Functions

This sensor fulfills two primary functions. It provides highly accurate (Level 1) zero-sequence voltage measurement for sensitive detection of ground faults and system imbalances, which is critical for equipment and network protection. It simultaneously delivers precise (0.5 class) phase-sequence voltage monitoring for comprehensive system analysis.

It directly converts high-voltage inputs into standardized, low-energy analog signals, eliminating the need for intermediate potential transformers. This enables seamless connection to digital substation equipment like relays and A/D converters, supporting real-time grid monitoring and intelligent automation.

Applicable Environment

The sensor is engineered for medium-voltage power distribution environments. Its primary application is in 10kV systems, typically for integration with switchgear like the LW34-10 series. It is ideally suited for modern digital substations, smart grid projects, and system upgrades requiring enhanced monitoring capabilities.

The high insulation level and low partial discharge ensure reliable operation in standard indoor switchgear or controlled outdoor installations. It is applicable in utility networks, industrial plants, and commercial facilities where precise earth fault detection and voltage supervision are paramount.

Product Highlights

Dual High-Accuracy Output: Provides simultaneous 0.5-class phase voltage and Level 1 zero-sequence voltage measurement for comprehensive system monitoring.
Enhanced Ground Fault Protection: Delivers precise zero-sequence signals crucial for fast and reliable detection of insulation failures.
Direct Digital Interface: Low-level analog outputs facilitate straightforward integration with modern digital protection and measurement systems.
Superior Insulation & Reliability: High impulse/power-frequency withstand voltage (12/42/75kV) and very low partial discharge (≤10pC) ensure long-term safety and stability.
Standardized Performance: Designed for 50Hz systems with a 2MΩ rated load, guaranteeing consistent and compatible performance.

Frequently Asked Questions

Q What voltage level is this sensor designed for, and which switchgear is it compatible with?

This sensor is primarily designed for 10kV medium-voltage power distribution systems. It is specifically suited for integration with switchgear such as the LW34-10 series, making it ideal for digital substations and smart grid upgrades.

Q What are the two main measurement functions this sensor provides?

The sensor simultaneously provides Level 1 accuracy zero-sequence voltage measurement for ground fault detection and 0.5-class phase-sequence voltage monitoring for comprehensive system analysis — both delivered through a single device.

Q Does this sensor require an additional potential transformer for connection to digital equipment?

No. The sensor directly converts high-voltage inputs into standardized low-energy analog signals, eliminating the need for intermediate potential transformers. This allows direct and seamless connection to digital relays, A/D converters, and other substation automation equipment.

Q What insulation and partial discharge specifications does this sensor meet?

The sensor features high withstand voltage ratings of 12/42/75kV for impulse and power-frequency tests, along with a very low partial discharge level of ≤10pC. These specifications ensure long-term electrical safety and operational stability in demanding environments.

Q Is this sensor suitable for both indoor and outdoor installations?

Yes. Thanks to its high insulation level and low partial discharge performance, the sensor operates reliably in standard indoor switchgear as well as controlled outdoor installations, making it versatile for utility networks, industrial plants, and commercial facilities.

Q What is the rated load and operating frequency for this sensor?

The sensor is designed to operate on 50Hz power systems with a rated load of 2MΩ. This standardized specification ensures consistent, compatible performance across a wide range of digital protection and measurement applications.