E53-COV04 Omron, E53-COV04 Datasheet - Page 51

• Manufacturer Part Number: E53-COV04
• Description: E5CJ TERMINAL COVER
• Manufacturer: Omron

Specifications of E53-COV04

• Accessory Type: Terminal Cover
• For Use With/related Products: E5CJ
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: E53COV04

Heater Burnout Alarm Value
8-4-1 Setting Examples
Example 1
Example 2
52
1, 2, 3...
1, 2, 3...
The normal heater current value should be 50.0 A max. The heater current value
can, however, display up to 55.0 A. If the current value exceeds 55.0 A, CT input
overflow will result and
In this example, 1-kW, 2-kW, and 3-kW heaters at 200 VAC are connected in par-
allel.
In this example, 400-W, 1700-W, and 2000-W heaters at 200 VAC are con-
nected in parallel and the difference between the normal current value and heat-
er burnout current value is less than 2.5 A.
1. Turn the control output ON and check the normal heater current value from
2. Disconnect the heater whose current consumption is smallest and compare
3. Set the heater burnout alarm value to the mean value of the normal current
1. Obtain the normal current value and heater burnout current value in ad-
2. For stable hater burnout detection, in such a case, increase the number of
the heater current value display.
Normal current = (1000 + 2000 + 3000) B 200 = 30.0 A
the heater current value from the heater current value display.
Heater burnout current = 30.0 – 1000 B 200 + 25.0 A
Normal current – heater burnout current = 30.0 – 25.0 = 5 A (y 2.5 A)
value and heater burnout current value.
Heater burnout alarm value = (30.0 + 25.0) B 2 = 27.5 A
vance as follows:
Normal current = (400 + 1700 + 2000) B 200 = 20.5 A
Heater burnout current = 20.5 – 400 B 200 = 18.5 A
Normal current – heater burnout current = 20.5 – 18.5 = 2.0 A (Stable detec-
tion is not possible because the value is not 2.5 A or more.)
turns of the wire passing through the CT as if apparent current value in-
Heater current value display
Heater current value display
Normal heater
current value
Heater burnout
current value
will be displayed.
CT input
overflow
Disconnect
1KW 2KW 3KW
1KW 2KW 3KW
Heater
Heater
Control
output ON
Control
output ON
CT
200 VAC
CT
200 VAC
Section 8-4