Electrical Workshop 2: Circuit Protection

What is the primary function of a control system?

To reduce the cost of the machine
To increase the efficiency of the machine
To provide protection for the operator and persons in the vicinity (correct)
To provide power to the machine

What is the main difference between a single-phase and a three-phase system?

The type of machine being powered
The number of lines required
The amount of power required (correct)
The type of electrical circuit used

What is the purpose of fuses and circuit breakers?

To protect the circuit from overloads (correct)
To increase the power of the machine
To reduce the cost of the machine
To provide protection for the operator

What is the name of the type of electrical circuit that requires only two lines?

Single-phase system (D) Signup and view all the answers

What is the function of overload relays?

To protect the motor (B) Signup and view all the answers

What are mechanical and electrical safeguards used for?

To protect the operator and persons in the vicinity (A) Signup and view all the answers

What type of diagram is used to show the physical layout of components and their wire connections?

Wiring diagram (C) Signup and view all the answers

What is the purpose of the M contacts in the holding circuit?

To keep the circuit energized when the start pushbutton is released (D) Signup and view all the answers

What is shown in Figure 1, but not in the ladder diagram?

The physical location of the M contacts (B) Signup and view all the answers

What is the purpose of the start-stop pushbutton station?

To start and stop the motor (D) Signup and view all the answers

What is the term used to describe the circuit formed by the M contacts and the start pushbutton?

Holding circuit (C) Signup and view all the answers

What type of installation is a wiring diagram commonly used in?

Motor control installations (B) Signup and view all the answers

What is the primary focus of schematic diagrams?

Electrical sequence of components (B) Signup and view all the answers

What state are schematics drawn to show components in?

De-energized or off state (D) Signup and view all the answers

What happens to a normally open contact when its controlling coil energizes?

It closes (A) Signup and view all the answers

What happens to the contacts controlled by a coil when it is de-energized?

They return to their normal state (D) Signup and view all the answers

What determines which contacts are controlled by a coil?

Label or number of the coil and contact (B) Signup and view all the answers

What is the consequence of the float switch closing?

The buzzer and warning light are connected in parallel (A) Signup and view all the answers

What type of diagram is commonly used in educational materials?

Pictorial diagram (A) Signup and view all the answers

What is the purpose of pictorial diagrams in motor control circuits?

To provide a detailed view of circuit components (C) Signup and view all the answers

What style of diagram is the top part of the diagram in Figure below?

Connection diagram (C) Signup and view all the answers

What is the purpose of ladder diagrams in motor control circuits?

To show the sequence of circuit operations (C) Signup and view all the answers

What is the document number of the learning module ESW2 ELECTRICAL WORSHOP 2?

REF-OAP-INT-SSD (B) Signup and view all the answers

What is the primary purpose of three-phase systems in industries?

To provide a large amount of power (A) Signup and view all the answers

How many current-carrying conductors are used in a three-phase system?

Three (A) Signup and view all the answers

What is the phase shift in the voltage and current waveforms between the three conductors?

120° (A) Signup and view all the answers

What is the characteristic of a balanced three-phase load?

Its current values cancel each other out (A) Signup and view all the answers

How are unbalanced three-phase loads mainly connected?

In Wye configuration (C) Signup and view all the answers

What is always true about a motor in a three-phase circuit?

It is always balanced (B) Signup and view all the answers