The GridSmart is a special Pole Mounted RTU which provides SCADA support for remote (nonsubstation) devices. It is often used with remote breakers which are fed from a distribution metering point or tap. The GridSmart is particularly cost effective for automating older devices such as Cooper Type W, 3A, and 4C recloser controls. Battery backup allows continued SCADA support during power outages. Communications is implemented with short-haul radio modems or fiber optics. Valquest provides a data concentrator RTU (VQ-9) for efficient channeling of data to the SCADA Master Station.


Input / Output Connections

Qty I/O Specification
3 Voltage Inputs 120 VAC
3 Current Inputs 0-10 Volt, 0-1 Amp LPCS, or 0-5 Amp CT
4-8 Digital Inputs Opto-isolated, external, or self-wetted
0-4 Digital Outputs Control Pairs

SCADA Functions

Analog Readings Digital Control
  • Three phase current & neutral measurement
  • Phase angle measurement on all phases
  • Fault current and duration measurement
  • Voltage measurement
  • Breaker Status
  • Non-Reclose Status
  • Ground-Fault Block Status
  • Local / Remote Status
  • Trip / Close
  • Non-Reclose
  • Ground Fault Block

Communications Protocols and Interfaces

Port 1 Port 2 Port 3
Supports DNP 3.0 Protocol through the following connections:
  • RS-232
  • Fiber Optic
  • Ethernet - TCP/IP
Maintenance and Programming:
  • RS-232
Programming and Data Storage:
  • DM Memory Card Slot

Man - Machine Interface:

  • Front panel display and controls (Operates with simple rotational and push-button control).
  • The LCD Display provides an easy to read visual interface for setup and status checking.

Technical Specifications

Voltage Measurement +/- 0.5%
Current Measurement +/- 1.0%
Peak Fault Current Measurement +/- 2.0%
Fault Duration Measurement +/- ½ Cycle
Fault Event Storage 50
Phase Angle Measurement +/- 0.5°
kVAr Measurement +/- 0.5%
kW Measurement +/- 0.5%
kVA Measurement +/- 0.5%
Power Factor Measurement +/- 0.5%
Line Frequency Measurement +/- 0.02 Hz
Temperature Range -40°F to 165°F
Humidity (Non-Condensing) 0 to 100%
Operating Voltage 108 to 145 VAC
Battery Voltage 12 VDC
Relay Contact Rating 10 Amps
Power Usage (without radio) 1 Watt
Enclosure Metal - Nema 4
Fiber Optic Termination ST - Connector
Protocols - Available PGE – 2179,
Modbus- RTU,
DNP 3.0