GIS PD Monitoring - USENSG - Rugged Monitoring
                     USENS-G: UHF PARTIAL DISTC3H0A1RGE 
SENSOR
- Wide band, Highly Sensitive, UHF PD Sensors for GIS
- High Dielectric, Rugged, and Reliable design
- Built-in overvoltage (transient) protection
- Shielded to avoid electromagnetic interface
- 100% Leak proof and pressure tested for 10 bar (Helium)
- Suitable for extreme environment, Outdoor Substation
- Customized according to GIS flange design & voltage 
level
Highly sensitive and accurate Partial Discharge 
sensor for measuring ultra high frequency 
signals emitted by partial discharge activity 
inside Gas Insulated Switchgears (GIS).
Product Summary
Monitoring partial discharge (PD) activity into the GIS (Gas Insulated Switchgear) is very important in determining the 
condition of the GIS and decide on condition based maintenance. All major power utilities and industrial customers 
are demanding for built-in PD sensors in their new GIS installations. Rugged Monitoring has developed the most 
advanced UHF PD sensor for GIS, capable of detecting smallest PD signals.
USENS-G is an Ultra High Frequency (UHF) antenna that is capable of detecting smallest UHF frequencies emitted by 
the partial discharge (PD) activity. The sensors are suitable for all types of GIS, and easy installation on the GIS flange. 
The sensors can easily be bolted on GIS flange. The IP65 rated ingress protection allows sensor to be installed at 
Outdoor GIS installations. Their wide band (200 - 3000 MHz) frequency response and high sensitivity (up to -90dBm) 
enables lower cost of PD monitoring system and higher ROI (Return on Investment).
Rugged Monitoring USENS-G is designed to fit into most of the GIS at all voltage levels. The sensors can also be 
customized according to GIS design and customer technical requirements. The sensors comes with built-in overvoltage 
protections and N-type connection. The sensors can be connected with any UHF based PD monitoring system 
regardless of manufacturers.
Applications
- Continuous Online Partial Discharge Monitoring - GIS PD Testing and Monitoring
- Periodic Partial Discharge Testing and Measurements - MV Switchgear PD Testing and Monitoring
- High Voltage Testing during Commissioning - Circuit Breaker PD Testing and Monitoring
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Benefits
- Higher sensitivity (-90dBm) ensure higher ROI - Built-in overvoltage protection keeps the PDM 
of monitoring electronics safer
- Wide frequency response, compatible with - IP65 protection and rugged design, suitable for 
all PDM systems outdoor installations
- Easy installable, and High Dielectric strength, - Leak proof sensors enables safety and 0% SF6 
Safest Sensors leakage
- Shielded Sensor, Noise Immunity - Customizable according to GIS design and customer 
requirements
TECHNICAL SPECIFICATIONS
UHF Frequency Response 200 - 3000 MHz
Sensitivity up to -90 dBm
Average Effective Height 
over 500MHz –  1500MhHz 25mm+
Min. Effective Height over 500Mhz –  1500Mhz 16mm+
Withstand Voltage up to 1500 kV
Output N-Type connector; Customized option available
Connector Circuit Impedance 50 Ω
Pressure Testing up to 10bar (with Helium Gas)
Vibration Testing Suitable for HV - GIS and Transformer applications
Ingress Protection (IP) IP-65
Ambient (Operating Temperature) -60 ⁰C to +100 ⁰C
Storage Temperature -60 ⁰C to +100 ⁰C
Operating Humidity 95% humidity at 50 ⁰C
Dimensions Customized as per GIS design
Weight app. 2.0 KG; Customized as per customer requirements
Install Position GIS Enclosure
Signal Cable Very low attenuation UHF (Coax) cable
ORDERING CODE Hole diameter on Sensor depth from 
GIS Flange (in the Flange (in cm) 
cm) rr = 01 to 99 hh = 01 to 99 mm
Type of Sensor cm
(i.e. D, B, S, P Sensor Model #
etc.) Y = 0 to 9
U S E N S -  G x - F d d -  B r  r  -  H h h -  Y Sensor Connector
Z 1 : N Type 
UHF Sensor GIS Flange Diameter in (Standard)
cm. 2 : TNC
dd = 01 to 99 cm 3 : BNC
Rugged Monitoring Services About Rugged Monitoring
Rugged Monitoring provides customization of sensors, Industry leading team of fiber optic experts with 100+ years 
monitors & software. In addition we offer on-site of combined experience committed to delivering 
commissioning services, maintenance contracts and customizable solutions for challenging applications. We 
technical support to all customers worldwide. offer a range of reliable,  high  performance,  
customizable  sensors  and monitoring solutions that are 
immune to external influence.
2018 Rugged Monitoring Company. All rights reserved. Information subject to change without notice. All trademarks are properties of their respective 
companies, as noted herein.
+1-418-767-0111 [email protected] www.ruggedmonitoring.com
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