LV Motor RTD Protection

[JBUDA54]

OK I am curious about a LV Motor Protection scheme. I usually specify Motor Protection Relays for MV Motors, but I have a 200HP 460V Direct Drive Pump that has Motor RTDs. Is the only way to protect the motor with respect to the RTDs through a Motor Protection Relay? Like an SEL 701, or SEL-749 via SEL2600, or a GE MM-300? Or Is there a RTD Module I can interface directly to the NEMA Motor Starter to shutdown the motor on RTD overload. I really don't need the MPR if I can interface the RTD module direct to the starter or is this not possible?

Thanks in Advance.

 

[ScottyUK]

In Europe RTD monitor relays are commonplace. They are usually small DIN rail mounting modules.

By by the time you have provided thermal overload, an RTD module, and earth fault protection - all typical on a machine of this size - you will likely arrive at the cost of a low end MPR which can do all those functions plus a few more. If it's a retrofit then a discrete RTD module makes sense.