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Types of circuits

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10/08/2024

Current Sensing Switch: A Brief Overview
A current sensing switch is an electronic device that monitors the electrical current flowing through a circuit and triggers an output when the current reaches a predetermined threshold.
How it works:
Current Measurement: The switch employs a sensing element (often a Hall effect sensor or a current transformer) to detect the current flowing through the circuit.
Threshold Setting: The user can adjust the switch to activate at a specific current level.
Output Activation: Once the measured current reaches the set threshold, the switch's output is triggered, typically closing or opening a relay or providing a digital signal.
Key Features:
Contactless operation: No physical contact with the current-carrying conductor, ensuring safety and reliability.
Fast response time: Quickly detects changes in current.
Adjustable threshold: Allows customization for different applications.
Isolation: Protects the control circuitry from high voltages in the monitored circuit.
Low power consumption: Efficient operation.
Applications:
Overload and short-circuit protection: Prevents damage to equipment.
Motor control: Monitors motor current to detect faults or overload conditions.
Power supply monitoring: Ensures proper operation and prevents equipment failure.
Battery management: Monitors battery charging and discharging currents.
Load sensing: Detects when a load is connected or disconnected.
Types of Current Sensing Switches:
Solid-state current sensing switches: Utilize semiconductor-based sensing elements.
Relay-based current sensing switches: Combine a current sensing element with a relay for output switching.
Digital current sensing switches: Provide a digital output signal.
Image of a typical current sensing switch:
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10/08/2024

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10/08/2024

Distribution Transformer.
The Essentials,
Role :
- Voltage Lowering: Converts high distribution voltage into lower voltage usable by end consumers.
Top features:
- Capacity: From a few kVA to several MVA.
- Voltage: 11-33 kV (primary) to 400-230 V (secondary).
- Types: Single phase and three phase.
- Cooling: Oil or Air.
Applications :
- Residential: Power the rooms.
- Commercials: Feeds businesses and offices.
- Industrial: Feeds small and medium industries.
Benefits:
- Efficiency: Minimizing energy loss.
- Reliability: Stable and continuous power supply.
- Flexibility: Adapted to various configurations and needs.
Next class on isolation transformer.

10/08/2024

Which type of connection is shown here?