Mikro RX300 Earth Leakage Relay Instruction Manual

Mikro RX300 Earth Leakage Relay

Specifications

• Auxiliary Supply:
  • Supply Voltage: 198 ~ 265VAC
  • Supply Frequency: 50 or 60Hz
  • VA Rating: 3VA max
• Accuracy:
  • Earth-leakage Setting In Sensitivity: 20mA – 30.0A
  • Time t: INST – 10.0s
  • Pre-fault: 10mA – 24.0A
  • Reset Hysteresis: 2% – 10%
• Output Contacts:
  • Rated Voltage: 250VAC
  • Continuous Carry: 5A(Cos = 1.0)
  • Expected Electrical Life: 105 operations
  • Expected Mechanical Life: 5 x 106 operations
• Environmental Conditions:
  • 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: 0.5kg

Product Usage Instructions

NFC Communication Setup
To use NFC communication with the relay, follow these steps:

1. Ensure your phone’s NFC function is turned on.
2. Download the Mikro RX app using one of the following methods:
   • Scan the QR code on the relay panel or align your phone’s NFC antenna with the NFC logo on the relay.
3. This will take you directly to the App Store for download.

Setting Parameters and Reading Values
You can read and set parameters using the mobile app through NFC. Make sure to align your phone with the NFC area on the relay for communication.

Real-time Monitoring
The relay provides real-time monitoring of system conditions for immediate feedback on any issues.

Reset and Test Functions
The remote reset and test functions can be performed using the designated buttons on the relay for convenience.

1. ( a ) Function indication
2. ( b ) Data indication
3. ( c ) Auxiliary power supply indicator
4. ( d ) Pre-fault indicator
5. ( e ) Trip status indicator
6. ( f ) ZCT fault indicator
7. ( g ) mA indicator
8. ( h ) Up button
9. ( i ) Down button
10. ( j ) NFC detection area
11. ( k ) Test button
12. ( l ) Reset/Mode button

Features

• Built-in NFC for reading and setting parameters through mobile app
• Real-time monitoring of system condition
• Built-in self test and soft recovery watchdog
• Internal relay failure (IRF) alarm for system abnormalities
• Time stamp event record of power failure and setting changes up to 120 events
• Time-stamp record of up to 30 faults and 30 pickups
• Selectable 50 or 60 Hz frequency
• Selectable fundamental or true RMS measurement
• Programmable Output Contacts
• Detection of no connection to ZCT
• Protected against nuisance tripping
• Remote reset and test function
• Incorporated fail-safe feature into trip contact

Case Dimensions

Typical Application Diagram

NFC Communication

SHUNT TRIP
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.

Technical Data

• Auxiliary Supply
  • Supply Voltage……………………………… 198 ~ 265VAC
  • Supply Frequency………………………… 50 or 60Hz
  • VA Rating……………………………………….. 3VA max
  • Accuracy
  • Protection Thresholds…………………. -15% to 0%
  • Time Delay…………………………………….. ±3% with a minimum 40ms
• Setting Ranges
  • Earth-leakage Setting
  • IΔn Sensitivity………………………………… 20mA – 30.0A
  • Time Δt…………………………………………… INST – 10.0s
  • Pre-fault…………………………………………. 10mA – 24.0A
  • Reset Hysteresis…………………………….. 2% – 10%
  • Output Contacts
  • Rated Voltage………………………………….. 250VAC
  • Continuous Carry……………………………. 5A(Cosφ= 1.0)
  • Expected Electrical Life………………….. 105 operations
  • Expected Mechanical Life………………. 5 x 106 operations
• Environmental 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……………………….. 0.5kg
• Earth Leakage Protection Class
  • Type A
• Zero-Phase Current Transformer
  • To operate with Mikro’s ZCT series of current transformer

System Operation

Push Button Operation

off mode. The display will switch off after 6 minutes if no key is pressed.

LED Indicator

Parameter Settings

Not applicable when output R2/R3 function set as Stc or IrF

 |
---|---
HEX| CFA| PFA| LFA
00| 0| 0| 0
01| 0| 0| 1
02| 0| 1| 0
03| 0| 1| 1
04| 1| 0| 0
05| 1| 0| 1
06| 1| 1| 0
07| 1| 1| 1

• LFA – Leakage Fault alarm
• PFA – Pre-fault alarm
• CFA – ZCT connection fault alarm
• PLO – Persistent fault lockout alarm/Transient as Ste or lrF fault lockout alarm *Only applicable for RX330

FAQ

Q: How do I reset the relay if a fault occurs?
A: You can perform a remote reset using the designated button on the relay or through the mobile app via NFC communication.

Q: Can I change the frequency measurement of the relay?
A: Yes, the relay allows you to select between 50 or 60 Hz frequency for measurement based on your requirements.

Q: What is the expected electrical life of the output contacts?
A: The output contacts are rated for 105 operations in terms of electrical life.

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