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Minilec Motor and Pump Protection Relays D2 MPR1

Minilec Motor and Pump Protection Relays D2 MPR1 Specification

Contact Form
1 Change Over (SPDT)

Contact Material
Silver Alloy

Power Consumption
< 3 VA

Working Temperature
-10C to +55C

Coil Voltage
230V AC

Ambient Temperature
-10C to +55C

Dielectiric Strength
2 kV AC for 1 min

Mechanical Life
>10 Million Operations

Contact Resistance
< 50 m

Protect Feature
Phase Failure, Phase Sequence, Phase Unbalance, Under/Over Voltage

Coil Power
< 3 VA

Product Type
Motor & Pump Protection Relay

Insulation Resistance
>=100 M at 500V DC

Theory
Electromagnetic Relay

Usage
Motor and Pump Protection

Contact Load
5A at 230V AC

Operate Time
1 sec (Typical)

Terminal Type
Screw Type

Rated Voltage
230V AC

Supply Terminal
Top & Bottom

Size
Compact

Color
White & Blue

Dimension (L*W*H)
77 x 22.5 x 110 mm

Weight
Approx. 180g

Response Time (Trip)
Within 140 ms

Trip Class
Class 10

Frequency
50 Hz

Indication
LED indication for Relay Status and Faults

Control Supply Voltage Range
270V-470V AC, 50Hz (Separate supply not required)

Humidity
Up to 95% RH (non-condensing)

Reset Type
Manual/Auto

Mounting Type
DIN Rail Mounting (35mm)

Enclosure Material
High Grade Flame Retardant ABS Plastic

Standards Compliance
IS/IEC 60947-5-1, CE Marked

About Minilec Motor and Pump Protection Relays D2 MPR1

Minilec Motor and Pump Protection Relays

OVERVIEW :-

	Phase Failure
	Unbalance
	Phase sequence and overloading
	Under Current
	Auto/Manual Reset
	Adjustable current trip settings
	Test Facility
	UC bypass facility
	Selectable overload characteristics
	2CO output relay

TECHNICAL SPECIFICATION:-

Supply Voltage

System	:	380-440 V AC ± 20%, 45-65 Hz
Auxillary	:	220-240 / 380-440V AC

Output Relay Contact		:	2 CO

Input		:	-

Trip Setting(Volts)
	Phase to phase unbalance	:	50% of Motor Current (Fixed)
	Under current (Dry running)	:	40% to 80% of set current (Adj.with Bypass facility)
	Overload	:	As per inverse time characteristics
	UV/OV	:	N.A.

Trip Time Delay

	On phase failure	:	4 Sec ± 1 Sec
	For overloading	:	As per Inverse Time Characteristics 2/5/10 Sec. (Selectable)
	UV/OV RP	:	N.A.

Resetting		:	Auto/ Manual (Remote with NC Push Button)

Approx Weight		:	400 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

CONNECTION DIAGRAM:-

Timing/ Relay logic Diagram	Electrical Connection Diagram

Relay contact position shown in 'Power off' condition

APPLICATION :-

Suitable for Panels in Following Applications:

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

Advanced Motor and Pump Protection

Minilecs D2 MPR1 relay offers robust defence against phase failure, sequence issues, unbalance, and under/over voltage problems. Its class 10 trip characteristic and high-sensitivity design ensure your motors and pumps remain shielded from electrical disturbances, enhancing operational safety and reducing downtime.

Intuitive Operation with LED Indicators

This model simplifies monitoring by featuring bright LED indicators for relay status and trip faults. The straightforward manual/auto reset and visible status feedback empower maintenance teams to respond quickly, thereby streamlining maintenance processes and system diagnostics.

Built for Reliability and Safety

Engineered with a high-grade flame-retardant ABS body, the D2 MPR1 meets both IS/IEC 60947-5-1 standards and CE requirements. Its compact size fits easily into control panels, while a strong insulation resistance and dielectric strength ensure dependable long-term operation even in humid and demanding environments.

FAQs of Minilec Motor and Pump Protection Relays D2 MPR1:

Q: How does the Minilec D2 MPR1 relay protect motors and pumps?

A: The D2 MPR1 relay continuously monitors electrical supply and detects phase failure, incorrect phase sequence, phase unbalance, and under/over voltage conditions. When a fault occurs, it disconnects the load within 140 ms, safeguarding the motor or pump against potential damage.

Q: What is the process for resetting the relay after a fault trip?

A: The relay supports both manual and automatic reset options. After clearing the fault, users can either reset it manually using the provided button or allow the device to reset automatically, making it adaptable for various operational preferences.

Q: Where can the D2 MPR1 be installed, and what is the recommended mounting method?

A: This relay is designed for easy integration into electrical panels using a standard 35mm DIN rail mount. Its compact size and top-and-bottom screw-type terminals ensure secure and straightforward installation in new or existing systems.

Q: What are the typical usage scenarios for this relay?

A: Primarily used for motor and pump protection, the D2 MPR1 is ideal for industrial, commercial, and agricultural applications where electrical reliability and machinery safety are paramount. It is particularly valuable in areas with fluctuating voltages or unstable power supply.

Q: When should the relay be used instead of basic overload protection?

A: Choose the Minilec D2 MPR1 when protection against not just overload, but also phase failures, incorrect phase sequence, voltage unbalance, and voltage extremes is required. It offers a more comprehensive protection suite compared to conventional overload relays.

Q: What are the key benefits of the LED indication feature?

A: The LED indicators provide real-time feedback on relay status and faults, simplifying troubleshooting and system monitoring. This helps maintenance personnel quickly identify issues, reducing downtime and maintenance costs.

Q: Is the relay suitable for humid or harsh environments?

A: Yes, the D2 MPR1 is designed to operate reliably in environments with up to 95% relative humidity (non-condensing) and temperatures ranging from -10C to +55C, offering robust performance in demanding conditions.

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