![background image](http://html.mh-extra.com/html/omron/e5c-series/e5c-series_user-manual_742592145.webp)
4 - 47
4 Basic Operation
E5@C Digital Temperature Controllers User’s Manual (H174)
4-1
2 Usin
g Heater Burn
ou
t (H
B) an
d He
ater Sho
rt (HS)
Alarms (Not
Su
pp
or
ted
f
o
r P
o
sitio
n
-p
ro
p
o
rt
io
nal Mo
dels.)
4
4-12-5 Application Examples
The heater burnout current when there is a burnout at the load is as follows:
(Heater burnout detection current) = (17.3 + 10) / 2
=
13.65 [A]
To enable detection in either case, use 16.1 A as the heater burnout detection current.
(b) Star Connecting Lines
Example: Using Three 200-VAC, 2-kW Heaters
The current when each phase is normal is 5.8 A (
≈
10 A
×
(1 /
√
3)).
The heater burnout detection current for this connecting line is 5.4 A (= (5.8 + 5) / 2).
Normal
Normal
Burnout
Current when there is a burnout =
10 A
×
(1/
√
3)
×
(
√
3/2) = 5 A
Current when there is a burnout =
10 A
×
(1/
√
3)
×
(
√
3/2) = 5 A
CT
CT
Load
Load
Load
5.8 A
5.8 A
5.8 A
200 V
200 V
200 V
Product
To CT input
Product
To CT input
Load (such as a heater)
CT
CT
Load
Load
Load
5 A
5 A
200 V
200 V
200 V
Burnout
Load (such as a heater)
Product
To CT input
Product
To CT input
CT
CT
Load
Load
Load
5 A
5 A
200 V
200 V
200 V
Load (such as a heater)
Product
To CT input
Product
To CT input
Burnout
Summary of Contents for E5C series
Page 2: ......
Page 18: ...Conventions Used in This Manual 16 E5 C Digital Temperature Controllers User s Manual H174 ...
Page 34: ...1 Introduction 1 10 E5 C Digital Temperature Controllers User s Manual H174 ...
Page 310: ...6 Parameters 6 94 E5 C Digital Temperature Controllers User s Manual H174 ...
Page 326: ...7 User Calibration 7 16 E5 C Digital Temperature Controllers User s Manual H174 ...
Page 364: ...A Appendices A 38 E5 C Digital Temperature Controllers User s Manual H174 ...
Page 365: ...Index 1 E5 C Digital Temperature Controllers User s Manual H174 I Index ...
Page 370: ...Index 6 E5 C Digital Temperature Controllers User s Manual H174 ...