|
There are two basic methods of circuit protection. They are fuses and circuit breakers. There are many variations of fuses and circuit breakers. This course attempts to explain how and why fuses and circuit breakers work. There is some basic theory upon which these devices are designed. There is an explanation of some of the terms that are applied to fuses and circuit breakers and why they are important to engineers who, by the very nature of their work, are exposed to the problems encountered in the use of electrical energy.
Fuse ratings include current (which is, after all) what causes fuses to open, voltage, amps interrupting capacity, and other items. There are places where fuse protection is superior to circuit breaker protection.
Circuit breaker ratings include all of the items mentioned above for fuses. Unlike fuses, they are resettable after a trip incident. There are places where circuit breaker protection is superior to fuse protection.
When a complex circuit, such as a large building or industrial facility, is designed and built the circuits should be selectively coordinated. This means that when (not if) a fault develops, only the part of the circuit involved in the fault should be disconnected. That means that power will remain available for the rest of the facility. Another way of saying this is:
A protection device (fuse or circuit breaker) should only operate if it is directly involved with the fault. Upstream devices should be sized to not trip or open when the device directly downstream of it opens.
In this 2 hour web-based
seminar, you'll learn....
-
How are fuses made?
-
How do fuses work?
-
How are fuses applied?
-
What are the advantages and disadvantages of fuses?
-
How are circuit breakers made?
-
How do circuit breakers work?
-
How are circuit breakers applied?
-
What are the advantages and disadvantages of circuit breakers?
-
What is selective coordination for fuses and circuit breakers?
To attend
this web seminar, you'll
need a computer with a high speed internet connection (DSL or
cable modem) and a phone line. For your comfort, it is recommended that
you use a speaker phone to connect to the web seminar.
Online registration ends
1 hour prior to
the seminar, however phone registration can be accepted up to 10 minutes
before the webinar begins. Please call 877 500-7145 (toll free) for
last-minute registration. Seminars fill up fast. Register early to reserve
your spot!
|
Accessing the Web Seminar |
Twenty-four hours prior
to the webinar, you will be emailed a web address for the webinar. On
the day of the seminar, simply go to the website provided in the e-mail (you
should be able to just click on the link in the e-mail). You will be
asked to enter your name and e-mail address. And you will need to
enter the password that was also sent to you in the e-mail. Once you
have logged in, a screen will pop up with the toll-free number to call.
Please try to log in at least 5 minutes prior to the webinar as we will
start promptly.
|
Printing Your Certificate |
After completion of the web seminar, you will
need to fill out a short online questionnaire to access your certificate of
completion. The questionnaire can be accessed immediately after the
seminar through your login account. In the questionnaire, you will
assess how well the seminar achieved the stated learning objectives.
You may cancel your enrollment in this web
seminar up to 48
hours prior to the seminar with a full refund, minus a $10 registration
service fee. Cancellations made less than 48 hours prior to the
seminar, but at least 4 hours prior to the seminar will not be refunded, but
will be credited towards future seminars. Cancellations made less than
4 hours prior to the seminar are not refundable.
Web seminars earn PDH credits for engineers in
all states, unless specifically stated otherwise in the literature for a
specific seminar. PDHengineer.com is an approved provider of
continuing education for engineers. For more details, check out your state requirements.
ATTENTION
NEW YORK ENGINEERS: This web seminar has been accepted by the
state licensing board and will fulfill the "live course" requirement.
|
