EVT/ZW20-10 Zero Sequence Voltage Sensor
Product Functions
◆Comprehensive Voltage Measurement: Provides simultaneous, independent outputs for accurate three-phase phase-sequence voltage and zero-sequence (residual) voltage monitoring.
◆Advanced System Protection: The dedicated zero-sequence voltage signal enables highly sensitive and reliable detection of single-phase ground faults, crucial for system safety in isolated or resonant-earthed networks.
◆Real-time Grid Monitoring: Delivers precise voltage data for energy metering, power quality analysis, and SCADA systems, supporting smart grid management and operational decision-making.
◆Fault Localization: Assists in rapidly identifying and isolating faulty line sections by providing clear zero-sequence voltage signals during unbalanced system conditions.
Applicable Environment
◇Switchgear Integration: Primarily designed for installation in ZW20-12 type outdoor vacuum circuit breaker cabinets and compatible medium-voltage switchgear panels.
◇System Voltage: Rated for standard 10kV (Um=12kV), 50Hz three-phase AC power distribution networks.
◇Installation Settings: Suitable for both indoor and outdoor applications within protective enclosures, built to endure typical environmental stresses such as temperature variations and humidity.
◇Network Type: Ideal for use in distribution systems requiring effective ground fault protection, including ungrounded, resistance-grounded, or arc suppression coil-grounded networks.
Product Highlights
◆Dual-Output Efficiency: Integrates two critical measurement functions into one compact device, saving panel space, reducing wiring complexity, and lowering overall system cost.
◆Superior Precision & Reliability: Offers 0.5-class accuracy for phase voltage and meets stringent Level 1 accuracy for zero-sequence voltage, ensuring trustworthy data for both measurement and protection schemes.
◆Robust Insulation Design: Features a high insulation level (12/42/75kV) and very low partial discharge (≤10pC), guaranteeing long-term operational safety and stability in demanding medium-voltage environments.
◆Modern Sensor Technology: Utilizes electronic sensing principles, providing benefits such as a wide dynamic range, excellent linearity, no magnetic saturation, and immunity to ferromagnetic resonance issues common in traditional inductive transformers.
◆Plug-and-Play Compatibility: Specifically engineered for straightforward installation and compatibility with ZW20 series circuit breakers, facilitating easy upgrades or integration into new switchgear assemblies.