EATON XV-440-12TSB-1-10 Combination Motor Starter

F300 Megablocks are DIN-rail mounted, device couplers for Foundation™ fieldbus

or Profibus PA networks. They allow connection of field devices to the segment

trunk cable and provide short-circuit protection to the segment.

Megablocks minimize hand wiring and allow individual devices to be added to

and removed from the segment without disrupting network communication.

Megablocks are available in four, eight, and twelve port versions. Multiple

Megablocks are easily wired together to allow larger segments to be constructed.

The MP-3000 Motor Protection relay includes logic to control the num

ber of starts that can occur on the motor in a given time period for cold

and hot motor conditions.  Settable timers are provided to control the

time between starts and to restart a motor after a stop.  Additional logic

is included for transition control of reduced-voltage starters.

2.2.1 Start Control Timers

Motors typically have limits on the number of cold starts, starts per time

period, and time between starts that are permitted without damage.

The MP-3000 incorporates these checks to prevent excessive starting

of the motor.

2.2.2 Reduced Voltage Starting

The MP-3000 provides transition and incomplete sequence detection

function for reduced voltage starting.  The User can select to transi

tion based on four logical combinations of starting current and time

sequence.  The incomplete sequence function can be used indepen

dently for feedback indication from the process, to trip the motor if

expected action does not occur.

2.2.3 antibackspin Timing

For certain applications, such as pumping a fluid up a pipe, the motor

may be driven backward for a period of time after it stops.  The MP

3000 provides an antibackspin timer (minimum time between stop and

restart) to prevent starting the motor while it is spinning in the reverse

direction.  The relay displays the timer countdown from the moment a

stop is declared by the relay.

2.2.4 Load Shedding

The MP-3000 provides a mechanical load shedding feature that can be

used to control the driven process.  The load shedding function closes

a contact on an overload condition to stop addition of load until the

overload condition subsides by a set amount.  Then the load shedding

contact opens and the load is restored