SCR19Z-M-220_SCR19Z-M-480功率控制器美***OMEGA欧米茄

SCR19 SCR Power Controllers Extend Heater Life Reducing Thermal Shocks

Zero Crossing or Phase Angle Fired

Single or Three Phase Load Switching

No Maintenance All Solid State Components

Close Control of Low Mass Heaters

Phase Angle with Soft Start for High Inrush Heaters

No Relay Noise Contact Arc Noise Eliminated

Semiconductor I2T Fusing

Optically Isolated Control Signal Input

SCR19Z-M-220_SCR19Z-M-480功率控制器美国OMEGA欧米茄

SCR19系列控制器提供两种比例控制方法-零电压切换和相位角点火。在零电压切换模式下，控制器打开交流电源电压的完整循环。触发电路设计为尽可能接近交流正弦波穿过零点的点打开SCR。实际上，线路电压是开着和关着的，并在整个循环中施加到加热器上。

当输入为4至20 mA时，Heter控制器的输出将在4 mA以下关闭，在20 mA时完全打开。比例作用是通过改变循环次数来实现的。输出将从低输入时的一个循环打开和九个循环关闭到最大输入时的所有循环打开。

SCR19可控硅功率控制器的输出由加热器集成，加热器产生与输入信号直接变化的平滑比例热输出。在相位角点火模式下，通过控制全交流正弦波每半个周期的开启（点火）点来控制负载功率。

SCR19Z-M-220_SCR19Z-M-480功率控制器美***OMEGA欧米茄

SCR19 SCR Power Controllers Extend Heater Life Reducing Thermal Shocks

Zero Crossing or Phase Angle Fired

Single or Three Phase Load Switching

No Maintenance All Solid State Components

Close Control of Low Mass Heaters

Phase Angle with Soft Start for High Inrush Heaters

No Relay Noise Contact Arc Noise Eliminated

Semiconductor I2T Fusing

Optically Isolated Control Signal Input

The SCR19 Series SCR Power Controllers are designed to proportion electric power to resistive loads only, such as ovens, furnaces, heat sealers, etc. (NOTE: They are not designed to drive transformers or any inductive load.) 

These heater controllers consist of power semi-conductors (SCRs), properly-sized heat sinks, trigger circuitry, and fuses supplied on panels for surface mounting. The SCR power controller accepts a 4 to 20 mA dc output from a temperature controller or can be supplied with manual option using a remote potentiometer. 

The SCR19 Series controllers offers two methods of proportional control – Zero-voltage-switched and Phase-angled-fired. With the Zero-voltage-switching mode, the controller switches on complete cycles of the ac supply voltage. The trigger circuit is designed to turn on the SCRs as close as possible to the point where the AC sine wave crosses through zero. In effect, the line voltage is turned on and off and applied to the heaters in whole cycles. 

With an input of 4 to 20 mA, the output of the heter controller will be off below 4 mA and full on at 20 mA. Proportioning action is obtained by varying the number of cycles on to the number of cycles off. The output will vary from one cycle on and nine cycles off at low input, to all cycles on at maximum input. 

The output of the SCR19 SCR power controllers is integrated by the heaters which produce a smoothly proportioning heat output that varies directly with the input signal. With the Phase-angle-fired mode, the power to the load is controlled by governing the point of turn on (firing) of each half cycle of the full AC sine wave.