Under/Over Frequency Protection

The under/over frequency protection element detects when the motor is

operating at off-nominal frequencies (which can damage the process) or signals

to upstream protection or control to implement load-shedding actions.

RTD Protection (Module Option 5C)

The M60 RTD option provides 8 programmable RTD inputs per module that

are used for monitoring the stator, bearing and ambient temperatures. Each RTD input

has 2 operational levels: alarm and trip. The M60 supports RTD trip voting and provides

open RTD failure alarming. Alternatively, a remote RTD module “RRTD”, which

supports 12 RTD inputs, can also be used with the M60 for temperature monitoring.

The RRTD provides cost savings compared with standard RTD wiring.