Applications of Energy Management Devices

Question 1

What are the two types of time clocks available? Which one offers more features?

Answer 1

• Electronic - offers more features

- Electromechanical

Question 2

What is the function of a duty cycle program?

Answer 2

It saves electrical energy by switching equipment off for short intervals during the occupied period

Question 3

What is the function of an optimal start/stop program?

Answer 3

It saves electrical energy by delaying morning start-up or advancing evening shutdown through a “self-learning” program

Question 4

A programmable thermostat combines the features of which two devices?

Answer 4

A thermostat and electronic time clock

Question 5

What does the term “direct digital control (DDC)” mean?

Answer 5

It refers to the control routine of stand-alone controllers, which is done in digital form

Question 6

What are the advantages of connecting a central computer to a network of stand-alone controllers?

Answer 6

Being able to carry out supervisory energy management strategies and to perform central monitoring

Question 7

What is “demand limiting” and how is it accomplished?

Answer 7

It is a feature that maintains the peak electrical demand of a building below the pre-set limit by turning off non-essential loads as required