Combined PT & CT Transformer
1. Scope of application
The Combined Instrument Transformer is an integrated device housing both a Voltage Transformer (PT) and a Current Transformer (CT). It serves to convert high voltage and large current in power systems into standardized low voltage (typically 100 V) and reduced current (5 A or 1 A), enabling precise metering, measurement, and control by energy meters, instrumentation, and protection devices.
Outdoor PT & CT Combined Transformers are specifically engineered for exterior environments. They feature weather-resistant structures (e.g., epoxy resin cast housing) with rainproof, dustproof, and corrosion-resistant properties, ensuring reliable operation under harsh climatic conditions.
With the evolution of smart grids, Combined Instrument Transformers are emerging as a transformative trend in integrated device technology.
2. Product standards
Comply with GB 20840, IEC TR 61869 and other standards
3. Operation environment
1) Altitude: ≤1000 meters.
2) Ambient temperature: Maximum +40°C, Minimum -40°C.
3) Max outdoor wind speed: ≤45m/s.
4) Max Ground ramp degree: ≤3°.
5) Seismic level: ≤3m/s² at horizontal direction and ≤1.5m/s² at vertical direction.
6) Installation environment: No obvious and heavy pollution, no explosive and corrosive gas and dust, with good air ventilation and no severe vibration and shock.
7) If the application environment is different from the above standard conditions, please contact for customized designs.
