问题:
在危险区域切换大功率电机：
对于线圈功耗很大的接触器来说，能否在3RB/3RU热继电器和接触器之间加装一个耦合继电器？还是必须将3RB/3RU的95/96触点直接连接到接触器的线圈上呢？
Switching large power motors in hazardousareas:
For controlling magnet coils of strong power contactors, can coupling relays beput in between the switching contacts of the 3RB / 3RU overload relay or doesthe 95/96 contact of the 3RB/ 3RU have to be switched directly into the controlcircuit of the contactor?
解答:
对于用3RB/3RU热继电器控制大功率电机，以下声明有效：
如果接触器线圈的功耗超过了3RB/3RU热继电器的触点容量，那么可以附加一个有足够切换容量的接触器或继电器作为一个接口，从而加强触点的通断能力。这对于在危险区域应用的电机保护方案也是有效的。
regards controlling power contactors with 3RB / 3RU overload relays, thefollowing statement is valid:
If the power consumption of the contactor coil to be controlled exceeds the ONand OFF switching capacity of the 3RB / 3RU overload relay, then an additionalcontactor or relay with sufficient switching capacity can be used as aninterface for strengthening the contacts. This is also valid for applicationsfor motor protection in hazardous areas.
原创文章，作者：ximenziask，如若转载，请注明出处：https://www.zhaoplc.com/plc323136.html
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