Distributor of Omron Automation & Safety: Excellent Integrated System Limited
Datasheet of C200H-DSC01 - DATA SETTING CONSOLE
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Appendix C
Heater Burnout Detection
62
Measure each current with the heater current monitor. In some cases the calcu-
lated current may differ from the actual measured value.
Sample SV Calculations
Example 1
Using one 200 VAC, 1 kW heater
Normal current = = 5 A
1000
200
Burnout current = 0 A
SV = = 2.5 A (
≤
49.9 A)
5 + 0
2
Example 2
Using three 200 VAC, 1 kW heaters
Normal current = x 3 = 15 A
1000
200
SV = = 12.5 A (
≤
49.9 A)
15 + 10
2
Burnout current with one heater burned out = x 2 = 10 A
1000
200
Difference between normal and burnout current = 15 – 10 = 5 A (
≥
2.5 A)
Specifications
Heater Burnout Detection Characteristics
Heater burnout detection setting range
0.1 to 49.9 A (in units of 0.1 A) (see note 1)
Current difference required for heater
burnout detection
2.5 A min. (normal time – burnout time)
Heater current monitor range
0.0 to 55.0 A
Monitor accuracy of input current
+
5% of FS
+
1 digit max.
Min. detectable ON time
200 ms (see note 2)
Note 1. If the heater burnout detection setting value is set to 0.0 or 50.0 A, no heater burnout detection is pos-
sible. The alarm signal is turned OFF if the heater burnout detection setting value is set to 0.0 A and
turned ON if it is set to 50.0 A.
2. If the heating control output is turned ON for less than 200 ms, no heater burnout detection or heater
current measurement is possible.
E54-CT1/CT3 Current Transformer
Max. continuous heater current
50 A
Dielectric strength
1,000 VAC (1 min)
Vibration resistance
50 Hz (approx. 10G)
Weight
E54-CT1: approx. 11.5 g; E54-CT3: approx. 50 g
Accessories (E54-CT3 only)
Contact: 2; Plug: 2
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