Power systems use current transformers for measuring the magnitude of current, monitoring its value, and signalling the protective relays for enacting safety measures when irregularities are spotted. A standard design of this transformer is a dead tank current transformer. It has been used for industrial and commercial energy metering. At Macroplast Transformers, we provide several kinds of instrument transformers. We manufacture and supply a variety of current and voltage transformers in multiple designs. In this blog, we are sharing the function and advantages of the 11 KV Dead Tank Current Transformers.
Dead Tank Current Transformer Explained
The 11kV dead tank current transformer (CT) is used to measure current in high voltage power lines of up to 11kV. This is called ‘dead’ because the potential of the tank is zero. A part of the primary winding passes through the lower part of the tank, where the core and secondary windings are located. Grounding the primary voltage provides safety to the setup. A small value of current is induced in the secondary winding, which is of a measurable range for the ammeter.
11 kV Dead Tank Current Transformer Advantages
Here are the top advantages of choosing an 11kV dead tank current transformer:
- Accurate Measurement
Used for metering, these provide accurate energy measurement by measuring the value of current. It can be used for high voltage applications also.
- Electrical Isolation
The dead tank design separates the high voltage loads from the measuring instruments, creating a safe path for the voltage to ground and current flow.
- High Voltage Capacity
These transformers can handle high voltage burdens from 2.5 VA to 50 VA. This allows for electrical safety in heavy industrial and commercial settings.
- Reduced Insulation Cost
The cost of insulating the ammeter and protective relay is reduced because of the sufficient insulation provided by the metal tank.
- Improved Safety
When the technicians operate, conduct routine checks and inspections, they get enhanced safety. It minimizes the risk of electrical shocks for the personnel.
- Weathering Resistance
These transformers have excellent resistance against weathering elements like dust, moisture and rain. From deserts to cold climates, these can withstand various conditions effectively.
- More Mechanical Stability
Since the primary windings are grounded at the lower part of the tank, the centre of gravity is lowered. Due to this, the mechanical stability of the entire system is high, making it useful in situations like heavy winds and mild tremors.
Conclusion
The primary advantages of a dead tank current transformer are its electrical isolation, robust design, safety for technicians, resistance against corrosion, and mechanical stability. It triggers signals to safety components whenever the voltage surges or lags, or any risk of electrical shock is sensed. By installing a reliable one, you can save your power system from electrical damage that could have been caused by below standard CT.
11 kV dead tank current transformer by Macroplast Transformer is highly valued. It is certified by IS 16227, 2705 IEC 61869, 60044, and has a rated burden of 2.5 VA to 50 VA. We make both dry type and oil-immersed types. If you want to buy a current transformer for your facility, choose us.
