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All documents provided below are in PDF format. To download a free copy of Adobe® Reader®, visit the Adobe website.



Product Data Sheets

NXCT Optical Current Sensor Data Sheet
NXCT-F3 Flexible Optical Current Sensor Data Sheet
NXVT Optical Voltage Sensor Data Sheet
NXVCT Optical Voltage & Current Sensor Data Sheet

Optical CT & VT Flash Demo
High-Accuracy Metering Example (Spec Sheet)

Application & Tech Notes

Technical Papers

Applications of High-Voltage Fiber Optic Current Sensors (1.29 MB)
(IEEE PES General Meeting 2006)

Interfacing Optical CTs and VTs to Relays and Meters (470 KB)
(IEEE T&D 2006)

Optical Current & Voltage Sensors in EHV Series Capacitor Banks Application (296 KB)

SF6-Free 550 kV Combined Optical Voltage & Current Transducer System (901 KB)
(IEEE T&D 2003)
Analysis of a 550 kV Current & Voltage installation.

Fiber-Optic Current Transducer Optimized For Power Metering Applications (409 KB)
(IEEE T&D 2003)
We demonstrate exceptional power measurement linearity over a wide dynamic range with an optical current transducer & power meter.

138 kV & 345 kV Wide-Band SF6 - Free Optical Voltage Transformers (618 KB)
(Winter PES 2002)
This paper describes the design & testing of novel, environmentally friendly, 138KV & 345kV optical voltage transducers (OVTs) for metering & protection relaying applications in high-voltage electric power transmission systems.

Optical Current Sensors Eliminate CT Saturation (711 KB)
(PES 2002)
Once deemed specialized devices intended for novel applications, optical sensors have risen to a performance level exceeding conventional magnetic devices.

230 kV Optical Voltage Transducer Using a Distributed Optical Electric Field Sensor System (729 KB)
(IEEE T&D 2001)
The devices met the accuracy requirements of IEC 0.2% class & IEEE 0.3% class & passed ampoules tests, chopped impulse tests, partial discharge tests, chopped impulse tests, partial discharge tests, wet & dry power-frequency withstand tests & mechanical withstand tests.

Fiber Optic Current Sensor Calibration (206 KB)
(IEEE T&D 2001)
Fiber optic current sensors have been touted for their potential ability to measure currents with accuracy better than 0.1% over dynamic range extending from literally milliamps to hundreds of kiloamps.

Reliability Considerations: Optical Sensors for the Control & Measurement of Power (235 KB)
(IEEE T&D 2001)
As the power industry adopts new technologies to control & protect its assets, complex electronic & optical systems are becoming prevalent with the consequence that reliability analysis tools are becoming increasingly relevant & useful.

Resistively Shielded Optical Voltage Transducer (911 KB)
(IEEE T&D 2001)
A high-voltage (HV) optical voltage transducer (OVT) using resistively shielded electric field sensors is presented for use in HV transmission systems.

Interfacing Optical Current Sensors in a Substation
(PES Summer 2001)
In order for users of optical transducers to realize the complete benefits available from this new technology, an understanding of the differences between conventional transformers & optical sensors is critical; this paper outlines these differences. (228 KB)

Wide-Band 138 kV Distributed-Sensor Optical Voltage Transducer: Study of Accuracy under Pollution & other Field Disturbances (2804 KB)
(PES Summer 2001)
Accuracy tests include various severe field disturbances such as the presence of conductive pollution-like layers on the insulator & the presence of other HV sources nearby. Test results show that the VT meets IEC 0.2% & IEEE 0.3% accuracy classes under these extreme field disturbances.

A Wide-Band High-Accuracy SF6-Free Optical Voltage Transformer (20 KB)
(EPRI 2001)
Optical voltage & current transducer technologies are emerging in the power sector as advantageous alternatives to the conventional instrument transformer technology for accurately & safely measuring electricity.