Naren Electrix Motor Protection Relays For 3 Phase Model MPR-W (3 to 7.5HP)

Sold By : Naren supratech

3,600.00

25% Off
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  • 4,800.00
  • 3,600.00
  • 25%
  • 3,600.00
  • Overall you save 1,200.00 (25%) on this product
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Naren Electrix Motor Protection Relays For 3 Phase Model MPR-W (3 to 7.5HP)

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26 July - 29 July
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Description

Product description
Features:

Overload Protection
Dry Run (Under Current) Protection
Single Phase Protection
Motor Cable Cut Protection
User Adjustable Overload and Dry Run Settings
3 Phase Digital Ammeter
Digital Voltmeter
Error Display on LCD
Tripping Current Display on LCD
Metal Body
Built in CTs
Connector type design
Motor ON Indication
CT powered PSU
Easy Setup and Installation

This product is a motor protection system that safeguards the 3 Phase Motor against Overload, Dry Run and Single Phasing. This product has to be attached to the existing motor starter. It allows the motor load to pass through it. The current drawn in all the 3 lines are continuously monitored and displayed on the LCD. The low current and high current settings need to be adjusted by the user. The motor is turned OFF in case of over current, under current (dry run) and when any of the supply phases are absent thus protecting the motor from damages. The reason for the trip along with the tripping current is displayed on the LCD.

Maximum Current Range:

1 to 5HP : 20A
3 to 7.5HP : 30A
5 to 12.5HP : 50A
15 to 20HP :60A
25HP : 80A

Connections:

Naren Motor Protection Relay can be connected in 2 configurations

1) Connecting MPR at the load end

Connect the output of the Starter to L1, L2 and L3 respectively (all 3 load wires)

Connect the motor cables to M1, M2 and M3

Connect C1 and C2 in series with the No- Volt coil or in series with the holding contact of the Contactor

Connect Red and Yellow Wires to 440V Incoming supply (Any 2 lines among 3)

Connect Blue Wires to any 2 Motor Cables (only for MPR 1 to 5 HP)

2) Connecting MPR at the Supply end

Connect the incoming supply lines (load wires) to L1, L2 and L3 respectively

Connect M1, M2 and M3 (same load wire sizes) to the incoming of your motor starter

Connect C1 and C2 in series with the No- Volt coil or in series with the holding contact of the Contactor

Connect Red and Yellow Wires to 440V Incoming supply (Any 2 lines among 3)

Connect Blue Wires to any 2 Motor Cables (only for MPR 1 to 5 HP)

Operation:

The LCD powers up automatically when the load current is detected in all the 3 lines. On sensing the current in all the 3 Phases, C1 and C2(Normally open contact) close. C1 and C2 will remain closed till current in all the 3 lines is within the set limit. C1 and C2 open only during the faulty conditions or when the motor is switched off manually. The reason for the trip along with the trip current is displayed on the LCD.

Technical Specifications:

Normally open Dry Relay Contacts
Wire Size to be used for L1, L2 and C1, C2 is a minimum of 0.5 sq. mm
Relay Closing time when currents are detected – 1 second

Tripping time:

Overload – 12 seconds
Dry Run (Underload) – 8 seconds
Single Phasing – 2 Seconds

Dry Run (Underload) – 8 seconfds
C1 and C2 closing time once the current is detected: About 2 Seconds

Product Dimensions:

Weight: 1180 Grams
Length: 24.1 cms
Breadth: 11.2 cms
Height: 7.7 cms

Setting:

Turn the Overload [H( )] [green knob] to maximum (clockwise)
Turn the Dry Run [L( )] [Blue knob] to minimum (anticlockwise)
Turn ON the motor and observe the load current in the second line of the LCD
Set the Overload H( ) value to 2 points more than the load current by rotating and observing the change in H( ) value in the first line of the LCD.
Set the Dry Run L( ) value to 2 points less than the load current by rotating and observing the change in L( ) value in the first line of the LCD.

Note: Set the L( ) value to minimum if the Dry Run Protection is not required.

Application:

Naren Motor Protection Relay is used in all 3 Phase Submersible Starters as a protection mechanism to protect the motor against current and voltage irregularities. This device effectively switches OFF the motor in any irregularity and hence prevents burning of the motor windings. The reason for turning OFF is displayed on the LCD which makes the diagnosis easy. This device is rugged and is specifically designed for agricultural operations. The motor safeguarding devices like these are very critical which will save the users from the costs incurred due to motor failures.

WARRANTY:

This product carries a warranty of 6 months from the date of purchase. Any issues within the warranty period will be attended to free of cost at our works in Bangalore. Post the warranty period, the product will be eligible for the paid service at our works. The invoice copy acts as a warranty card. The shipping of the product for repair will have to be done by the consumer.

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Naren Electrix Motor Protection Relays For 3 Phase Model MPR-W (3 to 7.5HP)
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