Grid Sentry is at the forefront of this movement, offering the best Smart Grid Line Sensor Platform on the market to help utility companies bring their distribution centers to the digital age. Our self-powered, patented sensor systems easily install on existing powerlines to provide instantaneous advanced data regarding fault detection and improved fault location, condition based vegetation management, load management, non-technical loss detection, outage and restoration detection, critical asset protection, harmonics, conductor temperature monitoring… and more.

1. 3915 Germany Lane • Beavercreek, OH • 45431 • Ph (844) 358-8216 • Grid Sentry, LLC
GS-250 Line Sentry
Cellular
Network Internet
DNP 3 over TCP/IP
Unsolicited
DNP 3.0
Gateway
Utility
SCADA Server
Line Sentry
Line Sentry
Line Sentry
Line Sentry
Firewall
VPN
DNP3
Cellular
Network Internet
DNP 3 over TCP/IP
Unsolicited
DNP 3.0
Gateway
Utility
SCADA Server
Line Sentry
Line Sentry
Line Sentry
Line Sentry
Firewall
VPN
DNP3
Intuitive Grid Technologies
GS-250 FEATURES
• Wireless real-time…………………Cellular, WiFi, Gridstream®, DNP3 direct
• Continuous 24/7 load logging…..Real-time data feed
• Programmable fault detection ….Intelligent, flexible
• Outage detection ……………….…Quickly detect & pinpoint outages
• Line temperature
• Current Harmonics
• Current Waveform Capture
• No battery
• Local outage indicator……………High intensity LED
• Easy to install………………………Shotgun hot stick
• “Last Gasp”….…….……………….Indication of shutdown due to low current or extended outage
• Grid Intelligence ……………….… Current RMS average, max/min currents, and Fault Current
• Weight………………………………. 3.6 pounds (1.6 Kg)
DISTRIBUTION AUTOMATION BENEFITS
• Operations
o Reduce outage times via immediate notification
and better localization
o Fault location support
o Fault identification support
o Identify trouble spots before outages occur
o Improved capacity utilization
o Continuous overload detection
o Load balancing and phase balancing
o Recloser detection
• Supports Both Short Term and Long Term Planning
o Accurate load history
o Load and phase balancing data
• Security
o Power theft detection
GS-250 OPERATING RANGES
• Current:
• Voltage:
10A to 1000A
Up to 69KV phase-to-phase
• Temperature : -40°to +85°C
• Cable size: 0.198” to 1.14”
Waveform Capture
Line Sensor Platform
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..........................Dynamic Line Rating
.......................Non-linear load detection
..........Fault Type Identification
......................................Self-Powered
DNP3 direct

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Grid Sentry, LLC. All rights Reserved. Specifications and features are subject to change without notice. All information presented is for informational
use only and no warranty is expressed or implied. Use is strictly forbidden without the express written consent of Grid Sentry, LLC
This product has been engineered and manufactured to ensure your personal safety. Improper use may result in potential electrical shock,
burns, or even death.
3915 Germany Lane • Beavercreek, OH • 45431 • Ph (844) 358-8216 • Grid Sentry, LLC
GS-250 Line Sentry Line Sensor Platform
General Specifications1
For more information, please contact:
Kim Gilmer
3915 Germany Lane, Suite 105
Beavercreek, Ohio 45431-1608
 (844) 358-8216
 info@gridsentry.us
www.gridsentry.us
Performance
Line Voltage
Frequency
Conductor Range
Visual Indication
Fault / Event Capture
Power Restoration
Power Source
Energy Storage
Communications
Mounting Method
Measurements
Line Current
Current Accuracy
Waveform Capture
Harmonics
Up to 69kV Phase-to-Phase
45-65Hz
#6 ACSR Turkey to 954 ACSR Rail
0.198” OD to 1.165” OD
High intensity LED for line outage
Pre-event line loading
Fault current measurement up to 25kA
Post-event line loading
Adaptive and absolute fault thresholds
Time of trip
Prevents inrush current false trips
Time of power-on
Inductively upon installation
Maintenance free super capacitors
Wireless remote DNP3/TCP and /
UDP Online firmware update
Fiberglass reinforced plastic (FRP)
shotgun (hotstick)
Average, max, min
(0 – 1000 Amps RMS)
1% of reading
116 samples / cycle
4 cycles before / 8 after fault start
Up to 19th
Line Temperature -67°F to +257°F
(-55°C to +125°C)
Shell Temperature -67°F to +302°F
(-55°C to +150°C)
Cellular Rx Power to -104 dBm
Physical
Antenna Height 2 in. (50 mm)
Weight 3.6 lb (1.6 Kg)
Housing Material UV stabilized
Ingress Protection IP67 weatherproof equivalent
Dimensions 11” L x 4” Dia.
(27.9 cm L x 10.2 cm Dia.)
Environmental
Operating Temp -40°F to +185°F
(-40°C to +85°C)
Storage Temp. -40°F to +185°F
(-40°C to +85°C)
Communications
CDMA Cellular
GSM Cellular
WiFi
Landis+Gyr
Future Support
DNP3
General
Dual-band support (800 & 1900 MHz)
Data Capabilities: 1x/QNC/HSPD
TCP/IP/PPP Firmware upgrade Over-the-
Air (FOTA) 1xRTT data rate to 153 kbps
Receiver sensitivity to -104 dBm
Quad-band for 850/900/1800/1900 MHz
HSDPA/EDGE/GPRS data Class B GSM
07.10 multiplexing protocol Coding
scheme CS1-CS4 Class 4 (2W) for
EGSM850/900 Class 1 (1W) for
GSM1800/1900
2.4 Ghz, 802.11b/g, single stream
802.11n
WEP, WPA/WPA2-PSK Security
Gridstream®
802.15.4g
DNP3 over TCP/IP and over UDP/IP
Sends unsolicited measurement reports at
user configurable rate
“Line Out” and “Last Gasp” sent
immediately
UTC time stamped measurements
Intuitive Grid Technologies
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