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Voltage Interruption Detection Unit VRU-36

INOTEL ELECTRIC

Voltage Interruption Detection Unit VRU-36

The VRU-36 is a low-cost, easy-to-use measurement device that samples the grid voltage at regular intervals and provides voltage presence/absence information for up to 36 channels.

Thanks to its MODBUS RTU communication protocol, it can be easily integrated with RTU, PLC, and SCADA systems. By securely transmitting measurement data, it enables continuous monitoring of voltage continuity in power infrastructure.

Catalogue

GENERAL

Supply Voltage : 18 - 36 Vdc (isolated)
Voltage Withstand : 1000 V
Operating Current : 70 mA
Power Consumption : ≤ 1920 mW
Measurement Accuracy : 2%
Mounting : DIN Rail

MEASUREMENT

Voltage Measurement : 0 - 500 Vrms
Phase-Neutral Voltage Measurement
Phase-Phase Voltage Measurement

DIMENSIONS

Dimensions : 90 x 212 x 59 mm
Weight : 425 g

ENVIRONMENTAL CONDITIONS

Operating Temperature : -25°C - +60°C
Storage Temperature : -30°C - +70°C

VRU-36 voltage monitoring unit

COMMUNICATION

RS485 : 1 port (galvanic isolation)
MODBUS RTU Protocol
Manual MODBUS ID configuration via DIP Switch
Data transmission to RTU, PLC and PC systems

INPUT & OUTPUT INTERFACES

Relay Output : 1 port
Analog Input : 12 x 3 ports
(0 - 500 Vrms voltage measurement)

FUNCTIONS

36 channel voltage presence monitoring
LED indication for power and communication status
Relay & LED warning when voltage falls below threshold
Simultaneous monitoring via single communication line

APPLICATION AREAS

Industrial Facilities
Solar Power Plants
Wind Power Plants
Hydroelectric Power Plants
Reverse Power Protection Systems

ChatGPT:

A single VRU-36 device can simultaneously monitor the voltage status of 36 different channels. This setup allows data transmission to control units over a single communication line, eliminating the need for costly analog modules and providing significant savings in system hardware costs.

⚙️ General Specifications

SpecificationValue
Supply Voltage18 – 36 VDC (Isolated)
Withstand Voltage1000V
Voltage Measurement Range0 – 500 Vrms
Operating Current70 mA
Power Consumption≤ 1920 mW
Measurement Accuracy±2%
Operating Temperature-25°C … +60°C
Storage Temperature-30°C … +70°C
Mounting TypeDIN Rail

🧠 Functions

  • Phase-to-Neutral voltage measurement
  • Phase-to-Phase voltage measurement
  • Data transmission via RS-485 port
  • Manual MODBUS ID configuration via DIP switch
  • Adjustable voltage drop alarm threshold
  • Alarm output through relay and LED indicator
  • LED indication for power and communication status
  • Reverse polarity protection

🔌 Communication Interfaces

InterfaceDescription
RS-4851 port (galvanically isolated)
Relay Output1 port
Analog Input12 x 3 ports (0 – 500 Vrms voltage measurement)

📏 Dimensions and Physical Properties

SpecificationValue
Dimensions (H x W x D)90 x 212 x 59 mm
Weight425 g

🌍 Application Areas

Solar Power Plants (PV Systems)
Wind Power Plants
Hydroelectric Power Plants
Industrial Facilities