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QYW Series Multi-function Protector
The QYW series multi-function protector is a dedicated protective relay for fully sealed transformers, providing light gas protection, low oil level protection, heavy gas (pressure over-limit) protection, oil level display, oil injection, oil replenishment, pressure release, and remote temperature display. It greatly facilitates monitoring and fault diagnosis of fully sealed transformers.
Installation PositionTop of the box cover
Environmental Range-30°C to +70°C (customizable to -45°C to +70°C)
Working Environment-30°C to +115°C (customizable to -45°C to +115°C)
Relative Humidity≤95% at +20°C
Protection LevelIP55 (customizable) · Altitude 0–4000 m
Contact CapacityAC 220V/3A · DC 220V/0.5A
Power Frequency Withstand VoltageNormally open contact 2000V/min · Normally closed / SPDT: phase-to-phase 1000V/min, ground 2000V/min
Insulation PerformanceNormally open contact 2500V, 500 MΩ · Normally closed / SPDT: phase-to-phase 1000V, 500 MΩ, ground 2500V, 1000 MΩ
Applications
Oil-Immersed TransformersOil-Immersed ReactorsPower CapacitorsFully Sealed TransformersBox-Type Substations