Motor Protection Relay

MODEL : μLEDx-Ti

 

 Application

Apart from the motor protection, metering and monitoring functions, the device can accept four hardwired digital inputs (potential free contact signals) which can be used for Start, Stop, Emergency Stop and Local/ Remote (Auto/ Manual) control selection. These input commands can also be transmitted to the remote-control room through RS485 communication network.
The device has three output relay potential free contacts, one relay with change-over contact (NO/NC) and two relays with NO contacts, which are pre-programmed for starter logics for DOL starter, Star delta Starter, Soft Starter or can be configured by user for control logics in SCADA.

 Pre-programmed IoS

The inputs and outputs are pre-programmed for starter logics to control the Power contactors of the DOL or Star Delta starter or soft starter.
The pre-programmed starter logics can be selected by entering the required logic as numbered in the intelligent MPD or IO module settings for starter logics:

  • One output relay used for MPD, other IOs can be freely configured by user.
  • IOs programmed for Direct on line (DOL) Starter
  • IOs programmed for Star / Delta Starter
  • IOs programmed for Soft Starter
  • IOs can be freely configured by user as per their logic requirement

Protection

  • Over Load
  • Single Phasing - Current Based
  • Unbalance - Current Based
  • Under Current
  • Lock Rotor
  • Short Circuit
  • Earth Leakage

Features

  • LED Seven Segment Display, brighter pixilation
  • Continuous scanning and display 3 phase currents and thermal capacity used
  • Annunciation for each type of fault
  • Numerical Algorithm for fast, reliable operation
  • Thermal Overload curves selectable as per requirement,
  • Excellent accuracy and longtime Stability of thermal curves due to complete software-based implementation
  • Customized protection CT as per load requirement supplied with the relay
  • Continuous self – supervision and fail-safe operation
  • Annunciation in case, motor fails to stop after protection device issues trip command
  • Man – Machine interface through keypad
  • Up to five event trip records, FIFO based
  • Reset Inhibit function, Hour Counter, Online calibration, Password facility (on demand)
  • Robust mechanical design with is shock proof non- metallic screw less unit

MEASURING & DISPLAYPARAMETERS:

  • R Phase Current (Ir)
  • Y Phase Current (IY)
  • B Phase Current (Ib)
  • Has Hour counter (Hr) (min)
  • Has Start Counter
  • Has Calibration facility

Product Range

  • 0.2 - 6.25 Amp, With External Line CTs 03 Nos. ID - 20mm
  • 0.4 - 12.5 Amp, With External Line CTs -03 Nos. ID - 20mm
  • 0.8 - 25 Amp, With External Line CTs -03 Nos. ID - 20mm
  • 2 - 62.5 Amp, With External Line CTs -03 Nos. ID - 20mm
  • 4 - 125 Amp, With External Line CTs -03 Nos. ID - 35mm
  • 40 - 250 Amp, With External Line CTs -03 Nos. ID - 55mm
  • 80 - 500 Amp, With External Line CTs -03 Nos. ID - 55mm*

*Note: Current range 80-500 Amp is available with all the above protections except short circuit protection.

DOL Starter

Star-Delta Starter

Soft starter