Transformer Types Assessment

Questions and Answers

AS/NZS 3000 clauses 4.14.2 to 4.14.5 provide the requirements for installation of which transformer types?

Primary circuit, High voltage transformer supply, Auto-transformers, Step-up transformers

Secondary circuit, Low voltage transformer supply, Auto-transformers, Step-up transformers (correct)

Primary circuit, Low voltage transformer supply, Auto-transformers, Step-down transformers

Secondary circuit, High voltage transformer supply, Manual transformers, Step-up transformers

In both high-voltage and low voltage transformers, the transformer bushings are used to:

Secure the transformer to the concrete slab

Identify the transformer windings

Calibrate the transformer impedance

Insulate the transformer terminals (correct)

Which THREE types of information are commonly found on transformer nameplates?

Serial number (correct)

Frequency (correct)

Winding connections (correct)

KW rating

Transformer cores are made from bronze.

False Signup and view all the answers

Which THREE of the following are types of transformer laminations?

L type Signup and view all the answers

Select the THREE relevant industry standards relating to transformers.

AS 60076.11-2006: Dry-type power transformers Signup and view all the answers

What is the purpose of the Minimum Energy Performance Standards (MEPS)?

A process for customers to understand the efficiency of an appliance Signup and view all the answers

Which type of transformer is usually used in high power switchboard metering applications?

Current Transformers Signup and view all the answers

Which transformers have the highest power rating and continuous voltage performance rating of all classes of transformers?

Power transformers (transmission and distribution) Signup and view all the answers

To accommodate changes in load, large distribution transformers are fitted with variable tappings to give relatively small changes in transformation ratio. What does this compensate for?

A drop in the supply voltage in distribution systems, or to allow for particular requirements of a connected load Signup and view all the answers

A voltage transformer can be protected from a secondary short circuit by incorporating fuses into the secondary circuits.

True Signup and view all the answers

What are the standard values of rated output VA for voltage transformers?

10VA to 500VA Signup and view all the answers

Study Notes

Topic Assessment Overview

Completed on August 3, 2024, in 3 minutes and 10 seconds.
Achieved a perfect score of 18/18, representing a 100% grade.

Transformer Types and Applications

AS/NZS 3000 clauses 4.14.2 to 4.14.5 address installation requirements for transformers.
Transformer bushings serve primarily to insulate the transformer terminals.
Transformer nameplates commonly display three types of information: winding connections, serial numbers, and frequency.

Transformer Construction

Transformer cores are not made from bronze; this statement is false.
Types of transformer laminations include:
- W&M Type
- E&I Type
- L Type

Industry Standards

Relevant standards for transformers include:
- AS 2374.1.2: Minimum Energy Performance Standards (MEPS) for distribution transformers.
- AS 2374.1: General standards for power transformers.
- AS 60076.11-2006: Standards for dry-type power transformers.

Minimum Energy Performance Standards (MEPS)

MEPS aim to help consumers understand appliance efficiency.

Transformer Applications

Current transformers are typically used in high-power switchboard metering applications.
Power transformers have the highest power and continuous voltage performance ratings among transformer types.
Variable tappings in large distribution transformers are used to accommodate voltage drops or load changes.

Protective Measures and Ratings

Voltage transformers can be safeguarded from secondary short circuits using fuses in the secondary circuits.
Standard rated output values for voltage transformers range from 10VA to 500VA.

Description

This quiz focuses on various types of transformers and their applications. It assesses the understanding of key concepts and real-world applications related to transformers. Successful completion showcases your proficiency in this essential topic.