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Summary of Contents for Megger Easytest 20 kV
- Page 1 Easytest 20 kV Quick Commissioning Tester USER GUIDE Issue: A (10/2020) - EN Article number: 128311586...
- Page 3 Megger All rights reserved. No part of this handbook may be copied by photographic or other means unless Megger have before-hand declared their consent in writing. The content of this handbook is subject to change without notice. Megger cannot be made liable for technical or printing errors or shortcomings of this handbook.
- Page 4 This warranty does not apply to faults in the software supplied. During the period of warranty, Megger agree to repair faulty parts or replace them with new parts or parts as new (with the same usability and life as new parts) according to their choice.
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Page 5: Table Of Contents
Contents Safety Advice ........................1-6 General Notes ........................1-6 General Cautions and Warnings ................... 1-7 Technical Description ...................... 2-9 Technical Data ........................2-9 Device Structure ......................... 2-10 Functional Description ......................2-11 Setting Up the System ....................3-12 Electrical connection of the Easytest System ..............3-12 Switching On the System .................... -
Page 6: Safety Advice
Only authorised persons with sufficient expertise are allowed to operate the device. Repair and maintenance Repairs and service must only be done by Megger or authorised service departments of Megger. Megger recommends having the equipment serviced and checked once per year at a Megger service location. -
Page 7: General Cautions And Warnings
In this case inform the person in charge who should inform the Megger service to resolve the problem. The instrument may only be operated when the malfunction is resolved. - Page 8 Be careful when working with high voltage Working on high voltage systems and equipment – especially in non-stationary operation – requires particular care and safety-conscious action on the part of test WARNING personnel. VDE regulations 0104 on setting up and operating electrical test systems, as well as EN 50191 and national standards and regulations must be strictly adhered •...
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Page 9: Technical Description
Technical Description 2.1 Technical Data Technical data The following parameters are specified for the Easytest receiver: Parameter Value Output voltage (DC) 0 ... -20 kV Source output current 15 mA Display ranges 0 ... 1 mA, 0 ... 50 mA Leakage current measurement 0 ... -
Page 10: Device Structure
Device Structure Front view The following illustration shows the front view of the Easytest: Controls and The Easytest system has the following controls and connections: connections Control Description Membrane keypad Display Emergency off switch HV output HV “interlock” key-operated switch HV on button HV off button Power switch... -
Page 11: Functional Description
2.3 Functional Description Operation modes The Easytest system offers the following operation modes: • DC testing (Hipot) up to 20 kV negative output voltage for testing the dielectric strength of new or disconnected cables (particularly for paper insulated lead cables (PILC)) •... -
Page 12: Setting Up The System
Setting Up the System Safety instructions for setting up • Select a location which is sufficient for the weight and size of the system and ensures that it stands securely. WARNING • When setting up the Easytest system, make sure no other systems or components are impaired in their function. - Page 13 Connection The following illustration shows the basic connection diagrams for the various operation diagram modes: DC and AC test HV connection cable Power cable <6 Ω Protective earth cable Sheath test / pinpointing <6 Ω Connection Connect the system in the following order: sequence Step Action...
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Page 14: Switching On The System
3.2 Switching On the System Switch-on procedure Before it is switched on using the power switch (8), the device is in the ‘off’ state. In this state, the HV output is earthed. For devices with external voltage protection (optional), the HV source and the internal earthing of the device are separated from the HV output by the HV circuit breaker. - Page 15 External voltage If external voltage protection is available, the external voltage detector monitors the protection (optional) presence of AC voltage at the HV output (from ‘standby’ mode onwards). If it is more than 1000 VAC, a system message appears and a continuous warning signal sounds. An internal circuit breaker then separates the HV output from the rest of the HV system in the device.
- Page 16 Over-temperature The device is protected by an over-temperature protection. If an excessive protection temperature is detected during operation, the device is switched to the ‘standby’ state. A system message appears to notify the operator. over temperature clear The operator has to take a break in order to cool down the device and then press the clear soft key to continue using the system.
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Page 17: Operating The System
Operating the System Main menu In the main menu you can scroll through the test profiles in the main menu using the ▼ and ▲ soft keys and read the settings for each profile in the left section of the display. -
Page 18: Adjusting Profile Settings
4.2 Adjusting Profile Settings Test profiles The Easytest system is delivered with a number of predefined test profiles (at least one per operation mode). The parameters of this test profiles can be adjusted by selecting the appropriate profile in the main menu using ▼ und ▲ soft keys and accessing the profile page using the Set soft key. -
Page 19: Logging Function (Optional)
4.3 Logging Function (optional) Introduction The measured data gathered by the Easytest system can be logged in an easy way using either a USB stick or a WinkisVLF system card. During sheath fault pinpointing and permanent DC tests, the measured data is not logged. - Page 20 The test data is written in a data file (*.csv) using the CSV (Comma-Separated File format Values) format. Furthermore a summary of the measuring results is written in a separate header file (*.txt). The names of the files result from the following pattern: <Prefix><Date><Consecutive number>.<...
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Page 21: Logging To A Winkisvlf System Card
4.3.2 Logging to a WinkisVLF System Card Prerequisites In order to log test data to a system card, a card prepared for usage in the Easytest system has to be plugged in the appropriate slot (12) before the test is started. The test data is only properly logged, if the card is already plugged in the slot prior to the test start and remains there during the complete test duration. - Page 22 After a system card has been plugged into the system, the remaining memory (in Remaining memory minutes) is indicated on the display (see previous page). With an empty system card, test data of 178 minutes can be logged. If the card run out of memory, no more data can be logged. The data has to be transferred to the WinkisVLF database in order to clear the memory space.
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Page 23: Performing Tests
4.4 Performing Tests Switching HV on/off Once you have selected the appropriate test profile from the main menu and selected Enter to open it, you are prompted to activate the high voltage. HV – On Push green button Switch HV on using the illuminated HV on button (6). Afterwards a note appears on the display notifying that the red illuminated HV off button (7) can be used to switch HV off. -
Page 24: Hipot Operation Mode
4.4.1 Hipot Operation Mode During a time-limited DC test, the breakdown detection of the system is active. If a breakdown occurs during a test, the system automatically terminates the test, discharges the cable under test and shows the following system message: Breakdown occured clear If no breakdown occurs at run time, the following system message informs about the... - Page 25 During recommissioning tests at very aged XLPE cables, a test voltage of 2 U and a test duration of 2 minutes must not be exceeded in order to avoid damaging the cable during the test. CAUTION Breakdown detection During an AC test, the breakdown detection of the system is always active. If a breakdown occurs during a test, the system automatically terminates the test, discharges the cable under test and shows the following system message: Breakdown occured...
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Page 26: Sheath Fault Testing / Pinpointing
4.4.3 Sheath Fault Testing / Pinpointing Test voltage In this operation mode, the test voltage can only be adjusted between 0 and the maximum voltage specified in the test profile (using the ▼ und ▲ soft keys). Mode toggle During operation, the operation mode can be toggled between sheath fault testing (DC mode) and sheath fault pinpointing with duty cycling 1:3 (1 second HV, 3 seconds pause) using the Mode soft key. - Page 27 Tento symbol indikuje, že výrobek nesoucí takovéto označení nelze likvidovat společně s běžným domovním odpadem. Jelikož se jedná o produkt obchodovaný mezi podnikatelskými subjekty (B2B), nelze jej likvidovat ani ve veřejných sběrných dvorech. Pokud se potřebujete tohoto výrobku zbavit, obraťte se na organizaci specializující se na likvidaci starých elektrických spotřebičů...
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