Introduction; Product Overview; Scope - GE Kelman DGA 900 Plus Installation & Commissioning Manual

1

INTRODUCTION

1.1

Product Overview

The Kelman™ DGA 900 Plus (the product) builds on the existing multi-gas online DGA
900 system with additional monitoring capabilities and a series of data models to
provide a complete transformer monitoring solution. This flexible offering combines the
latest technology and a range of options via a modular and retrofittable architecture. The
product uses additional sensors and electronic cards to gather and process key
transformer operational data. The latest firmware is embedded with intelligent
algorithms that utilise this data to determine incipient transformer faults early. Other
important transformer characteristics are also monitored and together this delivers an
integrated and comprehensive assessment of transformer health. Depending on the
options chosen, the product offers the following capabilities:
▪
Thermal models
▪
Cooling status
▪
OLTC monitoring
▪
Bushing monitoring & Partial Discharge (PD) detection
▪
Perception Fleet software
1.2

Scope

This manual must be read in conjunction with the standard DGA 900 manuals as listed in
the Related Documents section above. The standard 'DGA 900 Installation Manual'
provides important pre-installation considerations and core installation details that
must be read prior to installation in order to prepare the site and obtain the necessary
equipment in advance of the installation.
This product contains additional sensors, electronic cards and firmware to provide a rich
monitoring and modelling feature set as described in the respective Operator Guides.
Principally, this manual describes the Hub module and all hardware installation tasks
that are unique to the 'Plus' designation pertaining to thermal models, cooling status,
OLTC monitoring, bushing and partial discharge monitoring, such as bushing adaptor
connections, temperature sensors, CTs, related wiring details and preparatory tasks. This
manual also describes essential configuration operations and first start-up procedures
that must be done in the HMI as part of the commissioning phase. To configure and
generate all the data models, including setting alarms, refer to the 'MA-040 – DGA 900
Plus – Operator Guide'. For all other aspects of the installation, particularly regarding the
Analysis module including standard requirements and safety statements, refer to the
standard DGA 900 Installation Manual.
The 'DGA 900 Plus' manuals build on the standard 'DGA 900' manuals referenced in the
Related Documents table above, and together they form the comprehensive 'DGA 900
Plus' documentation set. Collectively the manuals examine installation for all options
including mounting, plumbing, power, electronics and communications, and
comprehensive use of the HMI for configuration, communications, alarm settings,
calculations and error notifications to avail of all monitoring and modelling functionality.
MA-040 – DGA 900 Plus - Operator Guide - Rev 1.1 4-Mar-22 Page 7 of 99