MPR D2 Overload Protection Relay

Introduction: It is a Overload Protection Relay with Single Phasing Preventors. It offers protection against overloading, underloading apart from protection against Phase Failure, Phase Unbalance & Phase Sequence Faults. It is best suitable for protection of individual 3 phase LV Motor rated upto 80 Amp. with Manual start. It eliminate conventional bimetal (thermal) overload relay with superior protection level. It is used for motors with Current Sensor CTS. It is recommended for effective Motor Protections in Machine Tools, Compressors & Pumps.

Features: · IDMT Current Sensing Electronic Overload Protection. · Protects against Overload, Phase Loss, Reverse Phase Sequence. · Selectable IDMT curves 2 or 5 sec. · Operates on separate AC Auxiliary Supply. · Separate Trip Indications. · Suitable with Minilec External current sensors & 5A CTs. · Manual / Remote / Auto Reset. · DIN Rail mounted enclosure.

Application Areas: Protection for LT, HT Motors. Auto Transformer Starter Panels. General Purpose machines. Motor Starter Panels / MCC s. Crane Motor Control Panels. Air-conditioning Machines. Compressor Control Panels. Centrifuge Machines.

Technical Specifications:

Sr. Parameter Specifications 1 Supply Voltage System 380/415/440V AC ±20%; Auxiliary 110/240/380/415/440 V AC±20%, 50/60 Hz 2 Output Relay Contact 1 CO (2 CO) 3 Input – 4 Power Consumption – 5 Trip Setting Phase to phase unbalance 50% of motor Current ±10%; Under current (Dry running) N.A.; Overload Above 120% of set Current (IDMTL) 6 Trip type 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. 7 Resetting Automatic / Manual / Remote 8 Temperature – 9 Humidity – 10 Dimensions (mm) Unit Overall (L x W x D) 76 x 56.5 x 117.5; Panel mounting (L x W) 67 x 46; CTS Overall (L x W x D) 75 x 38 x 113; Mounting (L x W) 68 centre to centre 11 Approx Weight Unit 440 gms.; CTS 320 gms for CTS 10, CTS 40, 300 gms for CTS 20 & 370 gms for CTS 80