why are gold-plated contacts not used in high-current applications?
why are gold-plated contacts not used in high-current applications?
Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter32: Three-phase Motors
Section: Chapter Questions
Problem 11RQ: What is the function of the field-discharge resistor?
Related questions
Question
why are gold-plated contacts not used in high-current applications?
Expert Solution
Step 1
Disadvantages of gold plating :
- Gold plating is well suited for low voltage low current applications only.
- The heating effect with the passage of current is more in the case of gold plated contacts than in silver-plated contacts.
- Gold is expensive.
- It is also soft and ductile which does not suites the requirement of plated contacts.
- If gold is used in the application where the arc is expected it will literally melt off.
Step by step
Solved in 2 steps
Recommended textbooks for you
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:
9781337900348
Author:
Stephen L. Herman
Publisher:
Cengage Learning
Electricity for Refrigeration, Heating, and Air C…
Mechanical Engineering
ISBN:
9781337399128
Author:
Russell E. Smith
Publisher:
Cengage Learning
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:
9781337900348
Author:
Stephen L. Herman
Publisher:
Cengage Learning
Electricity for Refrigeration, Heating, and Air C…
Mechanical Engineering
ISBN:
9781337399128
Author:
Russell E. Smith
Publisher:
Cengage Learning