Megger OTS80AF User Manual
Oil test set
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- User manual (42 pages) ,
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Summary of Contents for Megger OTS80AF
- Page 1 OTS80PB & OTS60PB OTS100AF, OTS80AF & OTS60AF Oil Test Set USER GUIDE...
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Page 2: Safety Warnings
Safety warnings and precautions must be read and understood before the OTS is used. They must be observed during use. The OTS must be used only in the way intended and for the stated purposes described by Megger. ■ ■... -
Page 3: Symbols Used On This Instrument
Symbols used on this instrument Caution: refer to accompanying notes Danger high voltage, risk of electrical shock DC voltage AC voltage Equipment complies with current EU Directives Earth terminal Fuse USB terminal Equipment complies with ‘C tick’ requirements Do not dispose of in the waste stream... -
Page 4: Table Of Contents
Contents Accessories and equipment Safety warnings Optional Spares Symbols used on this instrument General description Repair and warranty End of life disposal Features and benefits Applications Instrument controls and indicators Keypad and printer panel Rear panel Preparations for use Getting started Supply voltage Assembly Test vessel preparation... -
Page 5: General Description
General description Megger’s Oil Test Sets are liquid dielectric breakdown testers. The OTS80PB, OTS60PB models are portable instruments, designed for use in the field, where as the OTS100AF, OTS80AF and OTS60AF are designed for laboratory use. They are fully automatic, powered by battery or mains (model dependent) and facilitate accurate breakdown voltage tests on mineral, ester and silicon insulating oils. -
Page 6: Features And Benefits
OTS AF models The OTS60AF (60 kV), OTS80AF (80 kV) and OTS100AF (100 kV) models have much a larger test chamber for even easier access and cleaning, particularly useful in a lab environment. They are fitted with a 12 key alpha-numeric keypad to facilitate entry of test ID, file names, notes etc. -
Page 7: Applications
Applications The oil test set is used for determining the dielectric strength of high voltage insulating liquids, such as the insulating oils used in transformers, switchgear and other electrical apparatus. The dielectric breakdown voltage is a measure of the insulating ability of a liquid to withstand electrical stress. Contaminants such as cellulosic fibres, conducting particles, dirt, and water reduce breakdown voltage of an insulating liquid. -
Page 8: Instrument Controls And Indicators
Instrument controls and indicators Keypad and internal printer panel The control panel, illustrated below, is located to the front right side of the instrument and contains a QVGA colour screen (1), navigation keypad with ‘OK’ button and a ‘TEST’ button. The operation is user friendly and driven from six top level windows. -
Page 9: Rear Panel
Rear panel The rear panel illustrated below accommodates all connections to the instrument with the exception of a front facing USB interface. OTS PB model item description 1. Ground connection with cable lug 2. IEC line power socket 3. Fuses 4. -
Page 10: Preparations For Use
Preparations for use Getting started The safety It is important to read the user guide thoroughly before operating the Oil Test Sets for the first time. warnings are particularly important. Supply voltage Before connecting line power to the instrument, the ground connector should be connected to a suitable earth point. Both the AF and PB models are designed to operate on 50/60 Hz AC line power in the range 90 to 265 V AC. - Page 11 A better solution is to use test sets where the electrodes can be locked in position, such as the instruments in Megger’s latest OTS range. Megger recommends the use of flat, smooth gap gauges. The latest Megger gauges have a black anodized coating, which not only provides a smooth surface but also shows when the gauge is worn, as the shiny aluminium starts to show through the coating.
- Page 12 Gently place the stirrer lid onto the test vessel so that the ■ ■ baffle plate contacts the oil slowly, again so not to cause splashing that will introduce unwanted air bubbles into ✖ 400ml Fill to Line 400ml Fill to Line ✓...
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Page 13: Instrument Setup Procedure
Megger supplies as standard with the stirrer lid assembly three impellors. Firstly there’s the large red impeller which is useful for very dirty oil. This has larger blades to help ensure the effective circulation of any particulates between the electrodes during the test so that the full potential of their effect on breakdown voltage may be assessed. -
Page 14: Operating Instructions
Operating instructions Top level tabs The user is presented with a set of six tabbed, top level windows as depicted below which facilitate instrument control. Left and right arrow keys navigate between tabs. Home Setup File Information Tools Language The home tab contains summary information for each showing the selected automatic test standard, ID of the asset the insulating liquid comes from, the type of insulator, electrode gap and the stirrer if required. -
Page 15: Navigation And Character Entry
Navigation and Character Entry The keypad consists of arrow keys surrounding an ‘OK’ button used for navigating the screens and selecting functions and options. These six buttons fully control the instrument. Within each user interface window the up and down arrow buttons are used to navigate up and down the functions listed on the left side of the screen. -
Page 16: Set Favourite Test Standards
Favourite test standards It is important to setup favourite test standards from the standards library to avoid navigating thorough the entire list each time you want to change to a different test. To do this navigate to the ‘Tools’ top level window and select ‘Manage test standards’. -
Page 17: Test Results
Test results At the end of any test results are shown on the screen. A typical example is the ASTM D 1816-12 test. This image shows the complete on-screen information presented to the user however the screen size is naturally smaller so a slider function enables the user to navigate through the result and print it if required. -
Page 18: Custom Tests
Custom tests Custom tests are tests that can be defined by a user by giving the user control over the range of parameters set in a test. Three custom tests have been pre-programmed for user definition; Custom (5) – this test contains 5 successive breakdown tests ■... -
Page 19: Basic Memory Functions
Basic memory functions The internal memory is limited to fifty test records where a record represents a full result of one of the programmed standard tests. Best practice is to backup internal results on a daily basis by saving onto a USB memory device. When saving to USB memory device, a filename in the format of a maximum eight characters is required and the filename entered must only contain characters A-Z, a-z and 0-9. -
Page 20: Print Quality And Changing Paper
Test vessel motorised stirrer Megger’s motorised stirrer is integrated into a modified lid assembly and simply replaces the vessel lid. Power is connected via a flush mounted rear insert and is disconnected as the stirrer assembly is lifted. This unit is not user... -
Page 21: Preventive Maintenance
Care for OTS electrodes Brass electrodes supplied with the Megger oil test sets will show signs of deposits built up from insulating oil breakdown testing. If left they will oxidise and appear dull. -
Page 22: Technical Specifications
520 mm x 380 mm x 250 mm OTS60PB 520 mm x 330 mm x 250 mm OTS100AF 520 mm x 420 mm x 290 mm OTS80AF 520 mm x 420 mm x 290 mm OTS60AF 520 mm x 420 mm x 290 mm Weight... -
Page 23: Vcm100D/Vcm80D Voltage Meters
50% RH at 20 °C Storage humidity range 93% RH at 40 °C Safety The meter is only approved for use with Megger oil test sets Dimensions (W x H x D) 250 mm x 150 mm x 115 mm Weight 1.8 kg... -
Page 24: Accessories And Equipment
Only Megger supplied accessories can be used with the OTS range. Non approved equipment cannot be guaranteed to work with the OTS. Factory fitted accessories depending on order configuration Internal printer ■ ■ Electrode sets – IEC, ASTM and full electrode set containing one of each type of electrode ■... -
Page 25: Repair And Warranty
A number of independent companies have been approved for repair work on most Megger products, using genuine Megger spare parts. Consult the Appointed Distributor / Agent regarding spare parts, repair facilities and advice on the best course of action to take. -
Page 26: End Of Life Disposal
End of life disposal WEEE The crossed out wheeled bin placed on the Megger products is a reminder not to dispose of the product at the end of it’s product life with general waste. Megger is registered in the UK as a Producer of Electrical and Electronic Equipment. - Page 27 F +1 979 690 0276 F +27 031 5637990 E sales@megger.com This instrument is manufactured in the United Kingdom. The company reserves the right to change the specification or design without prior notice. Megger is a registered trademark Part No. OTS60PB--OTS80PB--OTS60AF--OTS80AF--OTS100AF_UG_en_V04 02/2017 www.megger.com...
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