Omron E5CN-HT User Manual page 104

Using Heater Burnout, Heater Short, and Heater Overcurrent Alarms
Burnout
5 A
200 V
Product
To CT input
200 V
200 V
5 A
Product
To CT input
Current when there is a burnout = 10 A
82
V Connecting Lines
Example: Using Two 200-VAC, 2-kW Heaters
Normal
10 A
Product
200 V
To CT input
17.3 A
200 V
200 V
10 A
Product
To CT input
CT
CT
(1/2)
= 5 A
The heater burnout current when there is a burnout at the common is as fol-
lows:
Heater burnout detection current = (10 + 5) / 2
The heater burnout current when there is a burnout at the load is as follows:
Heater burnout detection current = (10 + 0) / 2
To enable detection in either case, use 7.5 A as the heater burnout detection
current.
CT
CT
10 A
200 V Product
To CT input
10 A
200 V
200 V
Product
To CT input
Current when there is a burnout = 0 A
Section 3-10
CT
Burnout
CT
7.5 [A]
5 [A]