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.