Mikro RX300 User Manual

RX300 Earth Leakage Relay
User Guide
(c) (d) (e)
(a) (b)
RX 300
EARTH LEAKAGE RELAY
PRE.F TRIP
(f)
- I n - FLT1 - FLT2
ZCT FAULT
- FLT3
(g)
(h)
Earth-Leakage
( i )
- I n Sensitivity (A)
( j )
- t (s)
- Pre-Fault Alarm (A)
- Reset Hysteresis (%)
Functions Setting
Date and Time Setting
( k )
( l )
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
Case Dimensions
96mm
FRONT
( a ) Function indication
( b ) Data indication
( c ) Auxiliary power supply indicator
( d ) Pre-fault indicator
( e ) Trip status indicator
( f ) ZCT fault indicator
( g ) mA indicator
( h ) Up button
( i ) Down button
( j ) NFC detection area
( k ) Test button
( l ) Reset/Mode button
- 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
90mm
70mm
91±0.5mm
PANEL
SIDE
CUTOUT
Typical Application Diagram
SHUNT TRIP
REMOTE TEST
REMOTE RESET
DANGER
PROGRAMMABLE PROGRAMMABLE
TRIP CONTACT
OUTPUT 1
R1
R2
[Default setting for R3 set as IRF ]
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.
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
OUTPUT 2
(i)Earth-leakage Setting
R3
I n 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(Cosφ = 1.0)
Expected Electrical Life....................... 10
Expected Mechanical Life................... 5 x 10
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
Approximate Weight............................. 0.5kg
Earth Leakage Protection Class
Type A
Zero-Phase Current Transformer
To operate with Mikro's ZCT series of current transformer
operations
5
operations
6
IP20 at the body