The M20-201 Current Transformer Experiment focuses on studying current transformers, their principles, applications, and behavior under different load conditions.

Equipment Required

1. M20-201 Current Transformer setup

2. AC power supply

3. Ammeter or multimeter

4. Load bank or resistive load

5. Connecting wires and clips

6. Safety gear (gloves, goggles)

Applications of the M20-201 Current Transformer Experiment

1. Current Measurement:

   • To measure high currents indirectly by stepping them down to a safe, measurable level using the secondary winding.

   • The stepped-down current is then measured with ammeters or other instruments.

2. Load Testing:

   • To analyze the performance of the transformer under different loads.

   • Useful for studying how the secondary circuit affects the primary circuit and overall efficiency.

3. Understanding CT Principles:

   • To learn the transformation ratio, which relates the primary current to the secondary current.

   • To study the magnetic properties of the transformer core.

4. Relay and Protection Systems:

   • To demonstrate how CTs are used in protective relaying systems in power networks, where they sense fault currents and signal circuit breakers.

5. System Isolation:

   • To provide electrical isolation between the primary circuit (high voltage/high current) and the measuring instruments, ensuring safety for operators and equipment.

Theory

A current transformer (CT) is used to measure high currents by stepping them down to a lower, measurable value. It consists of:

• Primary winding: Few turns (connected in series with the load circuit).

• Secondary winding: Many turns (connected to the measuring device).

• Core: Magnetic material for efficient flux linkage.

Current Transformer (CT)

Features
.?4mm socket for convenience connecting
.Digital current meter for convenience indicating primary and secondary voltage
.Three bulbs' socket (W27) for lamp connecting


Specifications:
.Primary current: 0~2A
.Secondary current: 0~200mA
.Display of current meter 1: 0~1.999A (3 1/2 digits)
.Display of current meter 2: 0~199.9mA (3 1/2 digits)
.Current transformer ratio: 10:1
.Power source: 110~127VAC