Calculating Detection Current Values - Omron E5AN-H User Manual

Using Heater Burnout, Heater Short, and Heater Overcurrent Alarms

3-10-3 Calculating Detection Current Values

Heater Burnout Detection 1/2 set value = Normal current value + Burnout current value
Heater overcurrent 1/2 set value = Normal current value + Overcurrent value
AC line
Product
To CT input
AC line
Product
To CT input
■ Star connecting lines: Refer to the following diagram for CT installation
positions.
Note Heater voltage fluctuations are not considered here, so be take that
into account when setting the detection current.
AC line
Product
To CT input
Product
To CT input
■
V connecting lines: Refer to the following diagram for CT installation
positions.
Note Heater voltage fluctuations are not considered here, so be take that
into account when setting the detection current.
Product
To CT input
AC line
Product
To CT input
• Calculate the set value using the following equation:
HS Alarm 1/2 set value = Leakage current value (output OFF) + HS current value
• To set the current for heater burnout when two or more heaters are con-
nected through the CT, use the value from when the heater with the small-
est current burns out. If all of the heaters have the same current, use the
value from when any one of them burns out.
Load (such as a heater)
Load
CT
Load (such as a heater)
CT
CT
CT
Load (such as a heater)
CT
2
Section 3-10
2
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