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INTRODUCTION
Product Overview
The CB Watch 3 system (often abbreviated as CBW3 in this manual) is a monitoring system
for high voltage circuit breakers. It monitors the following aspects:
▪ Operation timing
▪ SF6 gas leakage
▪ Arcing contact wear
▪ Coil circuits
▪ Stored energy system (spring or pump)
▪ Cabinet / tank heater temperature
A web server HMI is provided to both configure the system and review the data but various
communication protocols are also available to transmit the data to a Historian or another
software system.
Document Scope
This Operating Manual is intended to explain the various monitoring functionalities of the
CBW3 and how they can be used to monitor a high-voltage circuit breaker. All outputted
information is detailed as well as all the possible alarms that can be set. Communication and
system settings are also covered.
Please refer to the CBWatch3 Installation Manual for information on the various modules
and sensors comprising the CBW3 system. It provides all the necessary information to install
and connect them together and configure the system.
Important note: All the available CBW3 monitoring options are detailed in this Operating
Manual. Depending on which configuration has been purchased and installed, all the
functionalities described in this document may not be available.
Abbreviations & Definitions
Abbreviation
CBW3
CB
CT
HV
AC
DC
HMI
IPO
MA-037 - CB Watch 3 Operating Manual
Meaning
CB Watch 3 System
Circuit Breaker
Current Transformer
High Voltage
Alternating Current
Direct Current
Web-page based interface
Independent Pole Operation
v7.0 – Apr 2020
Page 9 of 118
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