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Exceltech µLEDX-T Panel-Mount Motor Protection Relay

Exceltech µLEDX-T Panel-Mount Motor Protection Relay

Model number
µLEDX-T

Microcontroller-based motor protection relay for flush panel mounting, 0.2 A to 500 A with external CTs: overload, single phasing, unbalance, locked rotor, under current, short circuit and earth fault. LED display.

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Key features

  • Microcontroller based, with bright LED seven-segment display
  • Numerical algorithm with thermal imaging for fast, reliable operation
  • Overload by thermal curve or definite time
  • Displays the 3 phase currents and the thermal capacity used
  • Annunciation for each type of fault
  • Thermal overload curves selectable as required
  • Excellent accuracy and long-term stability of the thermal curves (software based)
  • Continuous self-supervision and fail-safe operation
  • Annunciation if the motor fails to stop after the device issues a trip command
  • Keypad for settings
  • Up to five trip records (FIFO)
  • Reset inhibit function, hour counter, onsite calibration
  • Password facility (on demand)
  • Robust, shock-proof, non-metallic screwless housing
  • 3-phase CTs supplied with the relay, sized to the load
  • Options: RS 485 MODBUS RTU, 4 – 20 mA output (or both), relay output for external alarm, external reset, password, phase reversal, thermistor temperature protection, pre-overload alarm

Specifications

Protection
FunctionsOverload (thermal or definite time), single phasing (current based), unbalance (current based), locked rotor, under current, short circuit, earth fault (with CBCT)
OptionalPhase reversal, thermistor-based temperature protection, pre-overload alarm
Current ranges
Rated current (motor FLC)0.2 – 500 A in seven CT ranges
CT ranges0.2 – 6.25 A, 0.4 – 12.5 A, 0.8 – 25 A, 2 – 62.5 A, 4 – 125 A, 40 – 250 A, 80 – 500 A
80 – 500 A rangeAll protections except short circuit; current measured up to 2000 A
CTExternal
Settings
Thermal overload setting range0.2 – 500 A, as per the CT range selected
Thermal overload curves2.5C, 5C, 10C, 15C, 20C and 30C (six curves) or definite time
Thermal overload operating timeAs per the curve selected, or 1 – 60 s (definite time)
Under currentEnable / disable; setting 10% – 80% FLC; operating time 1 – 60 s
Locked rotorPick-up 3 × FLC; pick-up delay during starting 1 – 30 s
Earth faultSetting 10% – 30% FLC; operating time 0.5 – 3 s; can be blocked for the first 10 s of motor starting
Short circuitPick-up 8 × FLC; instantaneous (not on the 80 – 500 A range)
Single phasingEnable / disable; operating time 2 s (fixed)
UnbalanceEnable / disable; setting 10% – 40%; operating time 3 – 10 s
Thermal resetEnable / disable; reset inhibit time 1 – 999 s (when thermal reset is disabled)
Pre-overload alarm (optional)Alarm point as per the current range selected; time 1 – 60 s
Display and records
DisplayLED seven-segment
Measures and displaysR, Y and B phase currents, thermal capacity used, hour counter, number of starts
Trip recordsUp to 5 events (FIFO)
Outputs (optional)
Data outputRS 485, MODBUS RTU; 4.8, 9.6 or 19.2 kbps; parity none, odd or even; word length 8
Analog output4 – 20 mA DC
General
Auxiliary supply85 – 270 V AC, 50 Hz (optional 110 V AC / 415 V AC)
Rated frequency50 Hz / 60 Hz
MountingFlush (panel) mounted
Dimensions (L × W × D)103 × 106 × 52 mm
Panel cutout92 × 92 mm
WeightApprox. 250 g
Ambient temperature0 °C – 55 °C
Degree of protectionIP54 (front of the device)

Specifications are from the manufacturer's published information. Confirm critical values with us or the datasheet before ordering.

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