Publication 900-UM007D-EN-E - January 2011
3-52
Configuration & Basic Operation
EXAMPLE
Using Three 200V AC, 1 kW Heaters
The heater power supply provides 15 A when the current is normal, and 10 A
when there is a burnout.
Figure 3.100 — Using Three 200V AZ, 1 kW Heaters
Therefore, the heater burnout detection current is calculated as follows:
EXAMPLE
Using Three-Phase Heaters, Delta Connecting Lines
The current when each phase is normal is 17.3 A (
≈
√
3
×
10 A).
Figure 3.101
— Delta Connecting Lines
The heater burnout current when there is a burnout at the load line is as
follows: (heater burnout detection current) = (17.3 + 15) / 2
≈
16.1 [A]
10 A
10 A
CT
15 A
→
←
15 A
200 V
CT
200 V
Normal
To CT Controller input
To CT Controller input
Burnout
Load
Load
Load
Load
Load
Load
Burn-
out
Heater burnout
detection current =
(Normal current) + (Heater burnout current)
2
=
15 + 10
2
= 12.5 [A]
CT
Load
Load
200 V
200 V
17.3 A
→
17.3 A
→
17.3 A
→
200 V
Normal
To CT input
Load
To CT Controller input
Summary of Contents for Allen-Bradley 900-TC16
Page 1: ...USER MANUAL Bulletin 900 TC8 900 TC16 900 TC32 Series B Temperature Controllers...
Page 2: ...2...
Page 72: ...Publication 900 UM007D EN E January 2011 3 2 Configuration Basic Operation Figure 3 3 900 TC32...
Page 136: ...Publication 900 UM007D EN E January 2011 3 66 Configuration Basic Operation Notes...
Page 340: ...Publication 900 UM007D EN E January 2011 5 112 Parameter Functions Definitions Notes...
Page 350: ...Publication 900 UM007D EN E January 2011 6 10 Troubleshooting Error Indication Notes...
Page 406: ...Publication 900 UM007D EN E January 2011 D 8 Glossary Notes...
