Mikro RX233 Overcurrent Relay User Guide

Mikro RX233 Overcurrent Relay

Specifications

• Three-phase, three stages setting for phase overcurrent
• IDMT and definite time protection
• Thermal overload protection
• Cold load pickup protection
• Circuit breaker failure protection
• Selectable fundamental or true RMS
• Selectable 50 or 60 Hz frequency
• Programmable output contacts
• 30 fault, 30 pickup, and 120 event records with date & time stamp
• Built-in NFC for parameter reading and setting through mobile app
• Complies with IEC 60255 standard
• ANSI code: 50P, 51P, CLP, 50BF, 49RMS

FAQ

Q: How can I download the Mikro RX app for parameter reading and setting?

A: You can download the Mikro RX app by scanning the QR code or aligning your mobile phone’s NFC antenna with the NFC logo on the relay front panel to access the App store.

PRODUCT OVERVIEW

• Function indication
• Data indication
• Auxiliary power supply indicator
• Low-set start/trip status indicator
• High-set start/trip status indicator
• Thermal Overload start/trip status indicator
• Up button
• Down button
• NFC detection area
• Test button
• Reset/Mode button

Features

• Three-phase, three stages setting for phase overcurrent
• IDMT and definite time
• Thermal overload protection
• Cold load pickup protection
• Circuit breaker failure protection
• Selectable fundamental or true RMS
• Selectable 50 or 60 Hz frequency
• Programmable output contacts
• 30 fault, 30 pickup and 120 event records date & time stamp
• Build in NFC for read and set parameters through mobile app
• Complies with IEC 60255 standard
• ANSI code: 50P, 51P, CLP, 50BF, 49RMS

Case Dimensions

Typical Application Diagrams

NFC Communication

Relay provides NFC communication convenient for user to read parameter values or to change setting through Android phone with NFC feature. The Mikro RX app can be downloaded in the mobile with one of following Methods:

Make sure phone NFC function is turned on
Scan the QR code or align the mobile phone NFC antenna on the NFC logo at relay front panel. This will take you directly to App store.

IDMT Curve

Technical Data

• Ratings

  • Rate Current In……………………………… 5A
  • Frequency……………………………………… 50 or 60Hz
  • Burden……………………………………………. <0.3VA at In
  • Thermal Withstand………………………. 4 x In Continuous

• Auxiliary Supply

  • Supply Voltage……………………………… 198 ~ 265VAC
  • Supply Frequency………………………… 50 or 60Hz
  • VA Rating……………………………………….. 3VA max

• Accuracy

  • Protection Thresholds…………………. ±3% or ±20mA
  • Time Delay…………………………………….. ±3% or ±40ms

• Setting Ranges
  (i)Overcurrent Setting

  • Low-set Setting 3I>……………………… 0.5A – 12.5A(10% – 250%)

  • Low-set time Multiplier ktI>………. 0.01 – 1.00

  • Low-set Definite Time tI>…………… 0.03 – 100s

  • Delay Type…………………………………….. DT, NI3/10, NI1.3/10, VI, LI, EI

  • High-set Setting 3I>>………………….. OFF/0.5 – 100A (10% – 2000%)

  • High-set Definite Time tI>>……….. 0.03 – 100s

  • Highest-set Setting 3I>>>………….. OFF/0.5 – 100A (10% – 2000%)

  • Highest-set Definite Time tI>>>… 0.03 – 100s
    (ii)Thermal Overload Setting

  • Low-set Setting I0>……………………….. OFF/0.5A – 10.0A(10% – 200%)

  • Low-set T 0……………………………………….. 1 to 200 minutes

  • Low-set time Multiplier ktI 0>………. 1.00 – 1.50

  • Trip………………………………………………… 50 to 200%

  • Alarm…………………………………………….. 50 to 200%

• Output Contacts

  • Rated Voltage………………………………….. 250VAC
  • Continuous Carry……………………………. 5A(Cos = 1.0)
  • Expected Electrical Life………………….. 105 operations
  • Expected Mechanical Life………………. 5 x 106 operations

• Enviromental Conditions

  • Temperature…………………………………….. -10°C to 55°C
  • Humidity…………………………………………… 5% to 95% non-condensing

• Mechanical

  • Mounting………………………………………….. Panel mounting
  • Dimension (mm) …………………………….. 96(w) x 96(h) x 90(d)
  • Enclosure Protection……………………….. IP54 at the panel
  • IP20 at the body
  • Approximate Weight……………………….. 0.8kg

System Operation

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