Double Pole Reversing Key

Product Code : SCL-EAE-11260

The Double Pole Reversing Key is a manual laboratory switch used to reverse the direction of current in a connected DC circuit. It allows students and teachers to change circuit polarity without repeatedly disconnecting the leads during galvanometer, magnetic-field and electromagnetism experiments.

Product Description

The key switches two circuit conductors at the same time. In one operating position, current flows through the connected apparatus in one direction. Moving the key to the opposite position interchanges the connections and reverses the direction of current through the load.

This switching arrangement is useful where an experiment requires rapid comparison of opposite current directions. It reduces rewiring and helps maintain a consistent circuit layout during practical work in an electrical and electronics laboratory.

Key Features

• Double-pole switching: Controls two conductors simultaneously.
• Current reversal: Changes the direction of DC current through connected apparatus.
• Polarity selection: Allows rapid comparison between two opposite connection states.
• Manual operation: Requires no internal electrical power or control circuit.
• Laboratory terminals: Supports connection to compatible low-voltage experiment leads.
• Reduced rewiring: Reverses circuit direction without moving individual leads.
• Reusable apparatus: Suitable for repeated demonstrations within its confirmed electrical rating.
• Visible switching action: Helps students understand commutation and polarity reversal.

Technical Specifications

What's Included in the Kit

• 1 × Double Pole Reversing Key

A power supply, galvanometer, ammeter, electromagnet, motor, connecting leads and other circuit components are not included unless specifically stated.

Applications / Uses

• Reversing current direction through a galvanometer circuit.
• Observing the reversal of galvanometer deflection.
• Changing the polarity applied to an electromagnet or solenoid.
• Comparing magnetic-field direction for opposite current directions.
• Reversing a compatible low-voltage DC motor during demonstrations.
• Supporting Fleming’s left-hand-rule activities with a Fleming’s Left Hand Rule Apparatus.
• Demonstrating the function of a double-pole reversing switch.
• Supporting experiments in the physics laboratory equipment range.

How to Use the Double Pole Reversing Key

1. Confirm the terminal layout and electrical rating of the key.
2. Keep the laboratory power supply switched off while wiring the circuit.
3. Connect the DC supply to the designated input terminals.
4. Connect the experimental load to the designated output terminals.
5. Check that no bare conductors are touching adjacent terminals.
6. Place the key in its first operating position.
7. Switch on the low-voltage supply and observe the current direction or instrument response.
8. Switch off the supply before moving the key if the model is not rated for live switching.
9. Move the key to the opposite position and repeat the observation.
10. Disconnect the power before altering the circuit.

Safety note: Never connect the reversing key directly to mains electricity. Use only a compatible, current-limited DC laboratory supply within the confirmed voltage and current ratings.

Care & Maintenance

• Keep the contacts and terminals clean, dry and free from corrosion.
• Do not force the lever, plugs or moving contact assembly.
• Tighten loose terminal hardware only with the circuit disconnected.
• Store the key away from moisture, chemical vapours and conductive debris.

Why Choose Lab Equipments Ambala

Lab Equipments Ambala manufactures and exports scientific and educational laboratory equipment from Ambala, India. Its range includes physics apparatus, electrical switches, circuit accessories and electromagnetism demonstration equipment. The company supports institutional procurement and international laboratory supply. Buyers should confirm the terminal configuration, materials and electrical ratings before ordering.

Frequently Asked Questions

What is a Double Pole Reversing Key used for?

It is used to reverse current direction or polarity in a low-voltage DC laboratory circuit without manually exchanging the connecting leads.

What does double pole mean?

Double pole means that the switch controls two separate circuit conductors at the same time.

Is a reversing key the same as a commutator?

In educational laboratory usage, a reversing key may also be described as a reversing commutator because it changes the direction of current through the connected circuit.

Can it reverse galvanometer deflection?

Yes. Reversing current direction through a suitable galvanometer circuit reverses the direction of its deflection.

Can it be used with a DC motor?

It may reverse a compatible low-voltage DC motor when the key’s switch configuration and electrical rating are suitable for the motor circuit.

Can the key be connected to mains electricity?

No. It is intended for controlled educational circuits and must not be connected directly to mains electricity.

Explore the complete electrical and electronics laboratory range or contact Lab Equipments Ambala to confirm the Double Pole Reversing Key’s terminal arrangement and electrical rating.