MA-006- Minitrans Operator Guide - Rev 2.2
5-Mar-20
Page 4 of 26
1
INTRODUCTION
1.1
Product Overview
The Minitrans
™ (herein referred to as the product) is an on
-line DGA (Dissolved Gas
Analysis) system for transformer diagnostics. The product measures the following key
fault gases in transformer oil: hydrogen, carbon monoxide and acetylene as well as
moisture in the oil and the transformer load current. Such data provides insight on
transformer condition criteria, such as developing faults, paper degradation and
electrical arcing. Once installed, operation is straightforward. All results are stored within
the product, but can be downloaded to a PC for analysis.
The key features and characteristics are summarised as follows:
▪
Utilises dynamic headspace sampling to extract target gases from the oil sample.
▪
No consumables, such as carrier gases are required.
▪
Accurate results are available as often as once per hour.
▪
Minimal maintenance*.
▪
Uses highly accurate and stable Photo-acoustic Spectrographic technology.
▪
Fully embedded microprocessor with non-volatile internal memory storage for 10,000
records.
▪
Stainless steel outdoor-rated IP55 enclosure connected to the transformer by robust
stainless-steel tubing.
▪
All gas sensing is carried out internally
–
no external gas sensors.
▪
Transformer load tracking is available.
▪
One user-configurable relay contact based on absolute gas and moisture values.
▪
Two sunlight-visible LED arrays on the exterior of the enclosure
–
one green for
power, one red for alarm.
▪
Communication options include: Ethernet, RS-232, Cellular modem (GSM/GPRS),
PSTN modem, RS-485 and Fibre Optic. Other options may be available on request.
▪
Internal USB connection provided for commissioning and service, or local data
download.
*Note: The only recommended maintenance is periodic cleaning of the air filters, in-
line oil filter and battery replacement.
1.2
Scope
This guide outlines the use of the LCD display panel, manual DGA sampling function and
general maintenance activities.
