EATON EMR-3MP0-2A9BB 48-230VAC 5A Motor Protection Relay

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Eaton’s EMR-3MP0 motor protection relay is a multifunctional 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 EMR-3MP0 relay is a current only device that provides complete and reliable motor protection, monitoring, and starting control functions. The EMR-3MP0 has been specially designed to simplify the settings and configuration providing a user experience very similar to the now obsolete Eaton MP-3000 motor relay. See pages 12–15 for information on the MP-3000 to EMR3MP0 retrofit relay kit.

The EMR-3MP0 motor protection relay has removable terminal blocks, and multiple communications options.

The EMR-3MP0 motor protection relay has three-phase and one ground current inputs. It can be used with either a 5A or 1A CTs. The ground protection 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.

Flash memory is used for the programming and all settings arestored in nonvolatile memory.

An integral keypad and display is provided for direct user programming and retrieval of data without the need of a computer. 14 programmable LEDs provide quick indication of relay status.

A front USB port is provided for direct computer connection. An RS-485 communication port on the back is standard for local area networking using Modbus-RTU or DNP3. An optional Ethernet port and various protocols are available.

The EMR-3MP0 motor protection relay has mass memory for data storage and a real-time clock with 1 ms time resolution. The relay will log 300 sequence of event records, 20 detailed trip logs, minimum/maximum values, load profiles, the 5 latest start profiles, motor trending, breaker wear information and oscillography data.

The EMR-3MP0 motor protection relay has four discrete inputs and 1 fiber optic input, 1 form C, and 2 NO programmable contacts, 1 form C healthy contact. It also has 4-20 mA analog output. The unit also comes with a test mode to force outputs and simulate currents, to facilitate the commissioning of the unit. It can be powered from 19 Vdc to 300 Vdc or 40 Vac to 250 Vac auxiliary power.

Key features, functions and benefits

• Microprocessor-based protection with monitoring, and control for medium voltage motors.
• Integral test function reduces maintenance time and expense.
• Reduce trouble shooting time and maintenance costs- Trip and event recording in non-volatile memory provides detailed information for analysis and system restoration. 6000 cycles of waveform capture aids in post fault analysis (viewable using Powerport-E software)
• Front USB port and Powerport-E software provides local computer access and user-friendly windows based interface for relay settings, configuration, and data retrieval.
• Fast and easy troubleshooting, improved maintenance procedures and increased device security. Provides detailed traceability for system configuration changes
• Relays self-diagnostics and reporting improves uptime and troubleshooting.

 

 

Specifications

Climatic environmental conditions
Storage temperature: -25°C up to +70°C (-13°F to 158°F) Operating temperature: -20°C up to +60°C (-4°F to 140°F) Permissible humidity at ann. average: <75% rel. (on 56d up to 95% rel.) Permissible installation altitude: <2,000 m (6,561.67 ft) above sea level. If 4,000 m (13,123.35 ft) altitude applies, a changed classification of the operating and test voltages may be necessary.
Degree of protection EN 60529
HMI front panel with seal: IP54 Rear side terminals: IP30
Routine test
Insulation test acc. to IEC60255-5: All tests to be carried out against ground and other input and output circuits. Aux. voltage supply, digital inputs, current measuring inputs, signal relay outputs: 2.5 kV (eff.) / 50 Hz Voltage measuring inputs: 3.0 kV (eff.) / 50 Hz All wire-bound communication interfaces: 1.5 kV DC
Housing
Housing B1: height / width 183 mm (7.205 in.)/ 141.5 mm (5.571 in.) Housing depth (incl. terminals): 208 mm (8.189 in.) Material, housing: aluminum extruded section Material, front panel: aluminum/Foil front Mounting position: horizontal (±45° around the X-axis must be permitted) Weight EMR-3000 housing B1: approx. 2.4 kg (5.291 lb)
Plug-in connector with integrated short-circuiter (conventional current inputs)
Nominal current: 1 A and 5 A Continuous loading capacity: 4 x In / continuously Overcurrent withstand: 30 x In / 10 s 100 x In / 1 s  250 x In / 10 ms (1 half-wave) Screws: M4, captive type acc. to VDEW Connection cross sections: 2 x 2.5 mm² (2 x AWG 14) with wire end ferrule. 1 x or 2 x 4.0 mm² (2 x AWG 12) with ring cable sleeve or cable sleeve. 1 x or 2 x 6mm² (2 x AWG 10) with ring cable sleeve or cable sleeve.
Voltage supply
Aux. voltage: 19 - 300 Vdc / 40 – 250 Vac Buffer time in case of supply failure: > = 50 ms at minimal aux. voltage communication is permitted to be interrupted. Max. permissible making current: 18 A peak value for <0.25 ms 12 A peak value for <1 ms The voltage supply must be protected by a fuse of: 2,5 A time-lag miniature fuse 5 x 20 mm (approx. 0.2 x 0.8 in.) according to IEC 60127 3,5 A time-lag miniature fuse 6,3 x 32 mm (approx. 0.25 x 1.25 in.) according to UL 248-14
Power consumption	19 – 300 Vdc: 6 W idle mode/8 W max. power
	40 – 250 Vac 6 W idle mode/8 W max. power