Which statement best describes an isolating switch?
It is a manually operated mechanical switch
An isolating switch, also known as an isolator, is a device used in electrical systems to ensure that a circuit is completely de-energized and disconnected for maintenance or inspection purposes. Below is the step-by-step explanation justifying the correct answer:
- An isolating switch is primarily used for safety reasons to ensure that no electrical current is flowing in a particular section of an electrical system.
- It is typically a manually operated mechanical switch. This means that a person must physically operate it to disconnect the power, ensuring that the operation is deliberate and controlled.
- The options provided are:
- It is a remote-controlled hydraulic switch
- It is a programmable digital switch
- It is an automatic electronic switch
- It is a manually operated mechanical switch
- Let's analyze each option:
- Option A: "It is a remote-controlled hydraulic switch" - Isolating switches are not typically remote-controlled or hydraulic. This option does not fit the function of an isolating switch.
- Option B: "It is a programmable digital switch" - Isolating switches are not digital or programmable. They are simple mechanical devices aimed at ensuring manual control.
- Option C: "It is an automatic electronic switch" - Automation is generally not involved in isolating switches as they need manual confirmation for safety reasons.
- Option D: "It is a manually operated mechanical switch" - This is consistent with the function and design of an isolating switch as it requires manual operation to ensure safety.
- Therefore, the correct option is Option D: "It is a manually operated mechanical switch".
Conclusion: Isolating switches are designed to be manually operated to provide a visible gap in the circuit, ensuring safety during maintenance activities. This clear demarcation is critical in industries to prevent accidental contact with live parts.
Similar Questions
Which component in a wiring diagram is specifically used to protect against overcurrent?
A domestic MCCB is marked 25A, 6 kA, 230V AC. Which fault current will this MCCB safely interrupt?
If an ELCB in a domestic installation trips occasionally without any apparent fault, what could be a probable reason?
Which part of a Vacuum Circuit Breaker (VCB) helps to maintain insulation and protects the breaker from external environmental influences?
Which safety device is designed to detect cable electrical leakage and disconnect the circuit?
An industrial panel uses a cartridge fuse rated at 250V, 32A. If a technician replaces it with a 16A fuse of the same voltage rating, what is the likely outcome during normal operation at 28A?
Which type of MCB tripping curve is most appropriate for protecting standard domestic lighting circuits?
Important Questions from Circuit Breakers
A single device that ensures efficient protection from electrical hazard of shock and fire caused by over current, short circuit, earth leakage, and earth fault is:
L series MCBs can be used effectively in:
An ON-OFF switch with overload protection is called a _______.
When an electric device, appliance or electrical installation is connected to the earth electrode without a fuse, circuit breaker or resistance/Impedance, It is called ___________.
What is the most common and important type of fuse used in domestic application?
