General description

Eaton’s Cutler-Hammer MP-3000 motor protection relay is a multi

functional microprocessor-based protective relay for the protection

of any size motor at all voltage levels . It is most commonly applied

on medium voltage or larger motors . The MP-3000 relay is a current-

only device that provides complete and reliable motor protection,

monitoring, and starting control functions .

The MP-3000 motor protection relay is available in either a fixed

mount, semi-flush case or in a semi-flush quick release drawout

case . Both housings are compact and fit a standard IQ cutout .

The optional quick release drawout case features two-stage contact

disconnects and self-shorting CT circuit terminal blocks . A spare self

shorting terminal pair is available for use as a relay removal alarm or

for continuous motor operation (non-failsafe mode) on relay removal .

The optional communication module is externally mounted on the

fixed mount case and internally mounted in the drawout case .

The MP-3000 motor protection relay has three-phase and one

ground current inputs . Both a 5A and 1A version are available . The

ground protection and metering functions can be used with either

a zero sequence ground CT or from the residual connection of the

phase CTs . The zero sequence ground CT provides greater ground

fault sensitivity than the residual connection . The unit is user-

programmable for 60 Hz or 50 Hz operation .

The MP-3000 motor protection relay has two discrete inputs, four

Form C (1 NO and 1 NC) contacts and one 4 to 20 mA analog

output . A fused source is available for the discrete inputs on the

MP-3000 . This eliminates additional control circuit wiring . The relay

provides maximum user flexibility to configure the I/O . All inputs

and outputs (except for the trip output) are user-programmable . In

addition, the relay has 10 LEDs for the indication of protection on,

program mode, monitor mode, view setting mode, history mode, log

mode, trip, alarm, auxiliary 1 and auxiliary 2 operation . Monitor mode

provides display indication of the discrete input states . The program

mode provides testing of the output relays, target LEDs, and

analog circuit .

A user-friendly operator interface and display provides quick access

to the settings, monitored values, motor history, and operational

logs . The large LED alphanumeric character display provides easy

viewing from any angle in any light . Simple keypad operation pro

vides quick and easy navigation through all settings and stored data .

The program mode and emergency override buttons are access

restricted via a seal and latched cover . An integrated help function

provides an online description display of functions, abbreviations,

and operations .