EVT/LW34-10 High-Precision Zero Sequence Voltage Sensor
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.