RTU

Power Supply Input
• Operating voltage range: 85 to 265 VDC/VAC
• Operating frequency range: 50 to 60 Hz
• Operating temperature range: -40 to 85°C
• Power consumption: 15 W (PW-00 and PW-01) / 30 W (PW-02)

Auxiliary Output
• Output voltage: 24 VDC – Regulated
• Maximum current drawn: 83 mA
• Maximum power supplied: 2 W
• Galvanic isolation: 2 kV / 60 Hz / 1 minute

Fault Relay
• Contact rating / (resistive load): 125 VAC / 15 A, 250 VAC / 10 A, 24 VDC / 15 A
• Maximum switching current: 6 amperes
• Minimum switching current: 500 mW/12 V/10 mA
• Maximum switching power: 1500 VA – 180 W
• Maximum switching voltage: 400 VAC / 125 VDC
• Mechanical life: 10^6 operations minimum, 300 cycles (operations/minute);
• NO operate time: 8 ms (max.)
• Release time: 4 ms (max.)
• Dielectric strength between coil and contacts: 4000 VAC (RMS)
• Dielectric strength between open contacts: 1000 VAC (RMS)
• Initial insulation resistance: 1000 MΩ (500 VDC)
• Vibration resistance: 10–55 Hz (double amplitude 1.1 mm/6 G)

• The remote unit's RTU-CPU module always includes a Micro-USB port for configuration via software.

• Starting with model 09, the remote unit's RTU-CPU module includes a USB-C port for configuration via software.

• Micro SD Card slot for recording and storing monitored data on a Class 10 Micro SD Card (10 mB/s). Variables can be selected for recording, and logging is based on time and variation in the measured quantity (optional).

• RS-485 communication ports (ANSI/TIA/EIA-485-A), allowing different Slave protocols to be configured on each output and one Master port to be configured with the Modbus-RTU protocol.

• Multimode optical fiber (ST) communication port, resistant to EMI / RFI and current fluctuations, ideal for data communications near transformers, heavy electrical equipment and other sources of electrical or radio interference.

• SIM Card slot (NBIoT) for access to IoT monitoring through Monitrafo.com. The card can be purchased directly from an NBIoT provider (vivo, claro, Tim), or contact us for plan pricing.

• Internal modem with a 3 dBi antenna for connection to any WIFI network and transmission of protocols (Modbus, DNP3 and IoT). • SFP (Small Form-factor Pluggable) communication interface with up to 3 SFP ports: 2 Ethernet ports in Bridge mode (ETH1 and ETH2) and 1 RS485 serial port. These ports require 100 Mb/s SFP transceivers with LC / SC and RJ45 connectors.

• WIFI (Modbus TCP and RTU / DNP3 / MQTT);

• Bluetooth for parameter configuration via mobile APP and virtual HMI;

• TCP/IP communication input (Modbus TCP and RTU / DNP3 / MQTT);

• RS-485 serial input (Slave or dedicated Master);

• SIM Card slot (NBIoT) for access to IoT monitoring;

• AI – ISOLATED ANALOG INPUT – 8 isolated analog inputs, 0…24 VDC and 0…20 mA;

• DI – ISOLATED DIGITAL INPUT – 8 isolated digital inputs, 24…300 VDC/VAC;

• PNI – PNP and NPN INPUT – 8 active PNP/NPN inputs, 0…24 VDC/5 mA per channel;

• RTDI – RTD – PT100 INPUT – 8 resistive signal inputs for PT-100 sensor readings (-50…850°C);

• AO – ISOLATED ANALOG OUTPUT – 8 isolated analog outputs, 0…24 VDC and 0…20 mA;

• DO – DIGITAL RELAY OUTPUT – 8 SPDT (NO/NC) digital relay outputs rated at 6 A;

• RBM – AIR CELL AND BLADDER RELAY – 1 liquid sensor input (SLE) dedicated to detecting transformer air cell and/or bladder rupture, or leaks

• MTTP – TEMPERATURE MONITORING (ANSI 23, 26, 49/49I) – 4 inputs for resistive signal readings from RTD PT-100 sensors.
4 inputs with a 4…20 mA range from split-core CTs for current signal readings.

• DVR – VOLTAGE REGULATOR (ANSI 90) – 4 inputs for voltage readings from 0 to 280 VAC (3 phases and neutral).
3 inputs for 0–10 A AC split-core CTs for phase current readings.

• MNO – LEVEL MONITOR (ANSI 71/71C) – 1 resistive signal input (magnetic float), with a 0…400 ohm range for transformer conservator oil level readings.
1 resistive signal input (magnetic float), with a 0…400 ohm range for oil level readings
in the transformer's on-load tap changer tank.

• OLTC-01 – ON-LOAD TAP CHANGER MOTOR TRANSDUCER – 1 input for voltage readings up to 350 VAC (phase-to-phase) + 1 input with a 4…20 mA range from a split-core CT for AC current signal readings from 1 phase of the on-load tap changer motor.

• OLTC-02 – ON-LOAD TAP CHANGER MOTOR TRANSDUCER – 1 input for voltage readings up to 350 VDC (phase-to-phase) + 1 input with an internal shunt resistor for direct AC current signal readings.

• Applied voltage (IEC 60255-5): 2 kV / 60 Hz / 1 min. (to ground);

• Impulse voltage (IEC 60255-5): 1.2/50 µs / 5 kV / 3 negative and 3 positive / 5-second interval;

• Electrostatic discharge (IEC 60255-22-2): Air discharge = 8 kV / Contact discharge = 6 kV;

• Radiated electromagnetic disturbance immunity (IEC61000-4-3): 80 to 1000 MHz / 10 V/m;

• Electrical fast transient immunity (IEC60255-22-4): Power supply/inputs/outputs = 4 kV / common mode 2 kV;

• Surge immunity (IEC60255-22-5): Phase/neutral 1 kV, 5 per polarity (±) – phase-to-ground/neutral-to-ground 2 kV, 5 per polarity (±);

• Conducted electromagnetic disturbance immunity (IEC61000-4-6): 0.15 to 80 MHz / 10 V/m;

• Climatic test (IEC60068-21-14): -40°C to +85°C / 72 hours;

• Vibration endurance (IEC60255-21-1): 3 axes / 10 to 150 Hz / 2 G / 160 min/axis;

• Vibration response (IEC60255-21-1): 3 axes / 0.075 mm at 10 to 58 Hz / 1 G from 58 to 150 Hz / 8 min/axis;