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参数资料
| 型号： | 84874130 |
| 厂商： | Crouzet USA |
| 文件页数： | 3/4页 |
| 文件大小： | 0K |
| 描述： | HT81 24-240VAC/DC PT |
| 其它有关文件： | Declaration of Conformity |
| 标准包装： | 1 |
| 系列： | * |
10/04/2014
www.crouzet.com
HWT81 operating principle :
As long as the temperature controlled by the PT100 stays between the two preset thresholds on the front face, the temperature relay is closed.
When the temperature exceeds one of the preset thresholds on the front face (upper or lower threshold), the preset time delay on the front face (Tt) is activated. The yellow temperature LED (R1)
flashes. At the end of the time delay, if the temperature still exceeds the preset threshold, the output relay opens and the yellow LED is extinguished.
The output relay R1 closes instantaneously when the temperature returns within the window of the two preset thresholds on the front face plus or minus the fixed hysteresis.
The unit also monitors correct sequencing of phases L1, L2 and L3 of the 3-phase network and the total phase failure in the event of phase regeneration (<70 %).
After a time delay on pick-up (t) and as long as the presence and sequence of the phases are correct, relay R2 and the R2 "phase" LED are active. When a fault appears, the "phase" relay opens
and the R2 "phase" LED is extinguished instantly (response time from the appearance of a fault).
On disappearance of the fault, both relay R2 and the phase control LED are activated (response time from the disappearance of a fault). See "Phase failure and phase sequence" curve on page
If the PT100 probe is wired incorrectly (missing or short-circuited), output relay R1 opens and the yellow R1 LED flashes.
N o
Legend
High threshold
Low threshold
Hysteresis
Monitored temperature
Threshold crossing delay adjustable on front face (Tt)
Dimensions (mm)
mm
Connections
Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected
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