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Minilec Motor and Pump Protection Relays MPR D2

Minilec Motor and Pump Protection Relays MPR D2 Specification

Contact Form
1 Changeover (SPDT)

Contact Resistance
< 100 m

Protect Feature
Under-Voltage, Over-Voltage, Phase Failure, Phase Sequence, Dry Run

Ambient Temperature
-20C to +55C

Coil Voltage
230V AC / 415V AC

Working Temperature
0C to 55C

Power Consumption
< 3 VA

Mechanical Life
>100,000 operations

Contact Material
Silver Alloy

Dielectiric Strength
2 kV AC for 1 min

Coil Power
2 VA (Approx)

Product Type
Motor and Pump Protection Relay

Insulation Resistance
>= 100 M @ 500 V DC

Theory
Electromagnetic Relay

Usage
Motor & Pump Protection

Contact Load
5A at 250V AC, Resistive

Operate Time
2.5-6 sec (Adjustable)

Terminal Type
Screw Terminal

Rated Voltage
230 V AC / 415 V AC (Selectable)

Supply Terminal
L,N (single phase); R,Y,B,N (three phase)

Size
Standard

Color
White with blue print

Dimension (L*W*H)
81 mm x 82 mm x 60 mm (Approx)

Weight
230 g (approx)

Enclosure Material
ABS Plastic, Flame Retardant

Mounting Type
Din Rail / Panel Mount Universal

Compliance
IS/IEC 60255-5, IEC 61000-4-5, CE Marked

Indication
LED Status Indicators for Healthy, Fault, and Trip

Input Frequency
50 Hz

Trip Delay
Adjustable

Humidity Range
Up to 95% RH non-condensing

Standard Packing
Single piece in box

Reset Type
Automatic / Manual selectable

About Minilec Motor and Pump Protection Relays MPR D2

Minilec Motor and Pump Protection Relays

OVERVIEW :-

	Phase Failure, Unbalance, Phase sequence and overloading
	Auto / Manual Reset,
	Adjustable current trip settings,
	Selectable characteristics,
	1CO / 2CO output relay

TECHNICAL SPECIFICATION:-

Supply Voltage

System	:	100-120 / 220-240 / 380-440 V AC ±20%
Auxillary	:	110/240/380/415 V AC 24 V AC/DC ±20%, 50 / 60 Hz

Output Relay Contact		:	1 CO (2 CO)

Input		:	From CTS

Trip Setting
	Phase to phase unbalance	:	50% of motor Current ±10%
	Under current (Dry running)	:	N.A.
	Overload	:	Above 120% of set Current (IDMTL)
	UV/OV	:	N.A.

Trip Time Delay

	On phase failure	:	5.5 secs. ± 1.5 secs.
	For overloading	:	As per selectable inverse time Characteristics (2 secs. / 5 secs.) or 10 secs. or 15 secs. or 20 secs. (optional)
	UV/OV RP	:	N.A.

Resetting		:	Auto / Manual / Remote

Approx Weight		:	425 gms.

Dimensions (mm)

Overall (L x W x D)	:	76 x 56.5 x 117.5
Mounting (L x W)	:	67 x 46 / 35 mm rail Mounting

Note:

Wherever not specified Contact Rating : 5A @ 230 V AC (resistive)

Selection Chart For CTS	Times full Load Current

APPLICATION :-

Suitable for Panels in Following Apllications:

	Air -Conditioning & Refrigeration Machines
	Screw Compressors
	Lift , Elevators, Hoist & Cranes
	Crusher Motors , Mining M/c
	End Users

Reliable Motor and Pump Protection

The MPR D2 relay protects equipment from a range of electrical anomalies including dry run, under-voltage, and phase sequence errors. Its adjustable settings provide precise control, helping preserve motor health and operational safety in diverse environments.

Flexible Installation and Robust Design

This relay supports both DIN rail and panel mounting, offering easy integration into existing setups. Built with flame-retardant ABS plastic and equipped with LED status indicators, it combines durable construction with clear operational feedback for maintenance teams.

Compliance and Performance Assurance

Certified to IS/IEC 60255-5, IEC 61000-4-5, and CE marked, the MPR D2 ensures international standards of reliability and safety. Its strong insulation, high mechanical life, and adjustable trip delay make it a dependable choice for continuous motor protection.

FAQs of Minilec Motor and Pump Protection Relays MPR D2:

Q: How does the Minilec MPR D2 motor and pump protection relay work to prevent equipment damage?

A: The MPR D2 constantly monitors input voltage, phase sequence, and phase failure to detect faults. If a condition such as under-voltage, over-voltage, or dry run occurs, the relay trips the circuit and signals via its LED indicators, helping avoid motor damage and costly downtime.

Q: What is the process for installing the MPR D2 relay, and which mounting options are available?

A: The relay offers universal mounting, making it suitable for DIN rail and panel mount configurations. Installation involves wiring the supply terminalsL,N for single phase or R,Y,B,N for three phaseusing screw terminals. The units compact size allows straightforward placement in standard control panels.

Q: When should the adjustable trip delay and reset type be selected or modified?

A: Adjustable trip delay (2.5-6 seconds) lets users tailor the response time to suit application needs, preventing nuisance tripping during transient events. The reset modeautomatic or manualcan be set based on operational requirements; use manual mode for critical equipment to ensure faults are cleared before restart.

Q: Where is the best location to install the MPR D2 relay for optimal performance?

A: Install the relay inside electrical control panels where motor or pump circuits originate. Ensure the environment meets the specified working temperature range (0C to 55C) and humidity does not exceed 95% RH non-condensing to maintain reliability and safety.

Q: What benefits do the LED status indicators on the MPR D2 relay provide?

A: LED indicators offer real-time visual feedback on the health, fault, and trip status of the motor or pump circuit. They allow quick identification of operational issues and facilitate efficient troubleshooting, minimizing downtime and promoting safe maintenance practices.

Q: How does the enclosure material and build quality contribute to safety and longevity?

A: Constructed from flame retardant ABS plastic, the enclosure protects sensitive internal components from heat and fire hazards. High mechanical life (>100,000 operations) and robust insulation ensure long-term durability and safety in demanding industrial conditions.

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