- 3 PHASE PROTECTION DEVICE
- DIMENSION(H×W×D)mm : 96×96×52Â
ABM - INSTRUMENT
ABM - INSTRUMENT
The "MPD 96" is a three-phase motor protection device (MPD) used to safeguard industrial electrical equipment from a range of faults. The device is typically a panel-mounted relay, with a dimension of 96 x 96 mm on the front face.Â
 Key protection features
An MPD 96 offers comprehensive protection by monitoring several electrical parameters. Features can vary by manufacturer, but commonly include:Â
Over/under voltage protection:Â Guards against damaging voltage fluctuations.
- Over/under current protection:Â Trips the motor circuit if the current exceeds or falls below a specified limit.
- Phase sequence and reversal protection:Â Prevents the motor from running in the wrong direction due to incorrect phase connection.
- Phase unbalance/single-phasing protection:Â Trips the motor if one phase is lost or if there is a significant current imbalance between phases.
- Locked rotor protection:Â Detects when a motor rotor is stalled and shuts off power to prevent motor burnout.
- Short circuit protection:Â Provides rapid shutdown in the event of a short circuit.
- Earth leakage/fault protection:Â Detects current leakage to the ground.Â
Examples of MPD 96 devices
Several manufacturers produce relays with a 96x96 mm panel mounting, often designated by "96" in their model number. Some examples include:Â
SA MPD 96 Three Phase Protection DeviceÂ
- Voltage: 230 V.
- Current rating: 5A.
- Dimensions: 96 (H) x 96 (W) x 52 (D) mm.
- Type: Current relay.Trinity Energy MPD-9611Â Display: 3-digit, 3-line, 7-segment red LED display.
- Auxiliary supply: 100 to 250V AC.
- Dimensions: 96 (H) x 96 (W) x 52 (D) mm.
- Protections: Features protection against over/under voltage and current, frequency variations, short circuits, lock rotor, unbalance, and phase sequence.
- Source: Trinity Energy operating manual.Â
Swastik MPD-961 Motor Protection DeviceÂ- Display: 3-digit, 3-line digital display.
- Measurement range: 0-500VAC voltage and 0-5000A current with CT selection.
- Dual relay output: Includes two relay outputs for separate fault and healthy status indication.
- Mounting: Suitable for both panel and channel mounting.
- Source: Amazon India.Â
How to select a motor protection deviceTo find the right MPD, you should consider the following factors:- Motor specifications: Note the motor's voltage, current rating, and horsepower (HP).
- Protection features: Determine which types of protection are necessary for your application (e.g., thermal overload, phase loss, locked rotor).
- Current transformer (CT) requirements: For high-current applications, you will need a device that can work with external CTs, and you will need to select the appropriate CT ratio.
- Display and interface: Choose between simple LED displays or more advanced LCD interfaces for monitoring and programming.
- Manufacturer: You may prefer a device from a specific manufacturer to maintain compatibility with other equipment.Â
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               Khasra no-174, Amausi Station Road Naderganj Industrial                         Area Lucknow226008
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