Megger VLF SIN-45 User Manual
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Megger VLF SIN-45 User Manual

Megger VLF SIN-45 User Manual

Vlf sinus test system with optional vlf cr-40-tb test boost
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Consultation with Megger
VLF SIN-45
VLF Sinus Test System
(with optional VLF CR-40-TB Test Boost)
USER GUIDE
Issue:
Article number:
04 (01/2015) - EN
82919
1

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Summary of Contents for Megger VLF SIN-45

  • Page 1 Consultation with Megger VLF SIN-45 VLF Sinus Test System (with optional VLF CR-40-TB Test Boost) USER GUIDE Issue: 04 (01/2015) - EN Article number: 82919...
  • Page 2 Consultation with Megger...
  • Page 3 Consultation with Megger...

  • Page 4: Consultation With Megger

    E: sales@sebakmt.com  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 5: Terms Of Warranty

    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.

  • Page 6: Table Of Contents

    Contents Contents Consultation with Megger ....................4 Terms of Warranty ......................5 Contents ........................... 6 Safety Instructions ................... 7 General Notes ....................7 General Safety Instructions and Warnings ............8 Technical Description ..................10 System Description ..................10 Technical Data ....................11 Load Diagram ....................

  • Page 7: Safety Instructions

    Working with products It is important to observe the generally applicable electrical regulations of the country in from Megger which the device will be installed and operated, as well as the current national accident prevention regulations and internal company directives (work, operating and safety regulations).

  • Page 8: General Safety Instructions 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 9 VDE regulations 0104 on setting up and WARNING operating electrical test systems, as well as EN 50191 and national standards and regulations must be strictly adhered to. The VLF SIN-45 test system generates a dangerous voltage of up • to 45 kV PEAK The test system may not be operated without supervision.

  • Page 10: Technical Description

    AC voltage (rectangular voltage) of up to 45 kV with a load- PEAK dependent slew rate Features The VLF SIN-45 test system combines the following features and functions in a single system: • AC voltage test with up to three different voltage waveforms •...

  • Page 11: Technical Data

    Technical Description Technical Data The VLF SIN-45 test system is defined by the following technical parameters: Parameter Value Output voltage, sine wave 2 … 32 kV / 45 kV PEAK Output voltage, DC wave 2 … 45 kV Output voltage, rectangular wave ±2 …...
  • Page 12 Technical Description The optional VLF CR Test Boost (VLF CR-40-TB) is defined by the following technical parameters: Parameter Value Output voltage, 3 … 40 kV cosine rectangular wave Output current 12 mA Frequency 0.1 Hz Testable load capacitance 4545455 μF at 40 kV Weight 42 kg Dimensions (W x D x H)

  • Page 13: Load Diagram

    Technical Description Load Diagram The following diagram applies to tests with sine wave voltage only and illustrates the dependency of the test frequency on the capacity of the load connected and the test voltage set. If a test frequency cannot be used due to the limits of the test system’s capacity, the frequency is automatically adapted and the user is informed of this.

  • Page 14: Scope Of Delivery And Accessories

    Technical Description Scope of Delivery and Accessories Scope of delivery The scope of delivery of the system includes the following: • Basic device • Cover • HV connection cable, 5 m • Mains power cable, 3 m • Earthing lead, 5 m •...

  • Page 15: Display And Controls

    Technical Description Display and Controls The following control and display elements are on the front panel of the VLF SIN-45 test system: Element Description EMERGENCY OFF switch ON/OFF button HV interlock key switch “HV On” button “HV Off” button USB port...

  • Page 16: Connection Elements

    Technical Description Connection Elements The following connection components are located at the rear of the VLF SIN-45 test system: Element Description Protective earthing connection HV output Power supply socket with fuses (2 x T6.3A) Socket to connect the external safety device...
  • Page 17 Technical Description The following connection components are located at the rear of the VLF CR Test Boost: Element Description HV connecting cable to connect to the VLF SIN-45 test system HV output Protective earthing connection Control cable to connect to the VLF SIN-45 test system...

  • Page 18: Commissioning

    Commissioning Commissioning General safety instructions for set-up and commissioning The safety guidelines for the operation of mobile testing systems often • differ from one network operator to another and are frequently subject to national regulations (such as the German BGI 5191). Before the WARNING measurement session, find out what the applicable guidelines are and follow the rules set out therein precisely, in respect of the organisation...

  • Page 19: Normal Connection

    Commissioning 3.1.1 Normal Connection Connection diagram The following figure shows a simplified connection diagram of the VLF SIN-45 test system: 110 V to 230 V, Connection method for cable testing and loss 50/60 Hz factor measurement Station earth or other suitable...
  • Page 20 Commissioning Procedure Proceed as follows, to connect the VLF SIN-45 test system to the test object: Step Action Using the green/yellow earth cable make a connection between the protective earth connection of the device and a suitable point on the protective earth system (station earth).

  • Page 21: Connection Via Vlf Cr Test Boost (Optional)

    Connection via VLF CR Test Boost (Optional) Purpose If the VLF SIN-45 test system is connected to the test object via the optional VLF CR Test Boost, tests with cosine rectangular voltage can be carried out (all other operating modes are disabled).
  • Page 22 Commissioning Step Action Connect the HV connection cable from the VLF CR Test Boost to the VLF SIN- 45 test system. To do so, insert the plug of the HV connecting cable , aligned as shown, into the HV output of the system.

  • Page 23: Use Of An External Safety Device (Optional)

    Commissioning 3.1.3 Use of an External Safety Device (Optional) Purpose With the aid of an external safety device, the current status of the system can be made clearly visible with coloured signal lamps and the generation of HV can be interrupted or locked with an EMERGENCY OFF switch and key switch.

  • Page 24: Switching On

    Commissioning Switching On The test system is switched on by pressing the ON/OFF button . The software starts within a few seconds. If the test system was switched off whilst in an operating mode, this operating mode is called up again immediately after restarting. Elsewise, the software remains in the main menu shown below:...

  • Page 25: Operation

    Safety Circuit Signalling Immediately after an operarating mode has been selected, the VLF SIN-45 test system continuously checks the requirements of the safety circuit. In the event that at least one requirement of the safety circuit is not fulfilled, the system disables HV operational readiness.
  • Page 26 HV output of the VLF CR Test Boost. connected. HV interlock The VLF SIN-45 test system has a key switch that can prevent high voltage being switched on. The switch can be set to the following positions: High voltage unlocked...

  • Page 27: General Operation

    Operation General Operation Operating concept Navigation within the menus is entirely controlled from the circular selection menu: Currently selected menu item Description of the currently selected menu item System Operating the system with the rotary encoder is as follows: Select the menu item •...
  • Page 28 Operation Phase selection Immediately after the activation of an operating mode (with the exception of the sheath pinpointing mode), the phase selection menu opens automatically: Phase selection is used to select the phases of the test object on which the measurement is to be carried out.
  • Page 29 Operation History database By pressing the function button located below the rotary encoder, the history database can be called up at any time irrespective of the position in the menu structure. The data in respect of all measurements and tests carried out with the system are contained in this database.

  • Page 30: System Menu

    Operation System Menu Selecting the menu item takes you directly to the system menu, where the following functions and submenus are available: Menu Description item Submenu with detailed system information Information on the current versions of the various software components Hardware information (e.g.

  • Page 31: Operating Modes

    Operating Modes Cable Testing Selecting the operating If the VLF SIN-45 is operated without the optional VLF CR Test Boost, the following mode cable test operating modes have been combined in their own submenu, which can be called up directly from the main menu by selecting the menu item...
  • Page 32 Operating Modes Button / Description Menu item Only adjustable for tests with sine wave or rectangular voltage This menu item is used to change the frequency of the VLF test voltage (0.01 Hz to 0.1 Hz). The HD 620 S1 und HD 621 S1 harmonisation documents recommend the 0.1 Hz frequency for VLF tests.
  • Page 33 Operating Modes Starting the test Once all the relevant parameters for the test as well as the phase(s) have been set, the actual test can be started using the menu item . After which 10 seconds remain to enable high voltage with the “HV On” button At the start of a test with sine wave or rectangular voltage, load detection is performed.
  • Page 34 Operating Modes Evaluation of the A dielectric strength test carried out to standard is generally deemed to have been test results successfully passed if there were no breakdowns in the test object throughout the duration of the test. In addition to this clear statement, further conclusions can be drawn on the state of the test object using the trend over time of the leakage current or the tanδ...

  • Page 35: Sheath Test And Sheath Fault Pinpointing

    Sheath Test and Sheath Fault Pinpointing Introduction To detect sheath faults, the VLF SIN-45 test system operates in test mode with a DC voltage of up to 20 kV (negative polarity), which also permits cables with a thicker outer sheath (such as cables rated 230 kV) to be tested.
  • Page 36 HV output. Depending on the setting (see above), the VLF SIN-45 test system either immediately starts with voltage conditioning or waits for the manual adjustment of the voltage. During sheath testing or sheath fault pinpointing the applied voltage can be manually adjusted...

  • Page 37: Sheath Test

    Operating Modes 5.2.1 Sheath Test Performing the test During the test, the voltage curve (blue) and the current curve (red) are logged in the display area in real time. The display area of the diagram can be increased or be reduced by means of the menu item Depending on the operating mode, a few relevant parameters and measured values are displayed next to the diagram:...

  • Page 38: Sheath Fault Pinpointing

    Operating Modes 5.2.2 Sheath Fault Pinpointing Pinpointing sheath After high voltage has been enabled and, if necessary, the desired voltage has been faults set, the fault position can be accurately pinpointed by means of an earth fault locator (e.g. ESG NT). For more details about operating the earth fault locator, please read the accompanying instructions.

  • Page 39: Vlf Tan Delta Loss Factor Measurement (Optional)

    Operating Modes VLF Tan Delta Loss Factor Measurement (Optional) 5.3.1 Preparing for Measurement Introduction Underground medium and high voltage cables are continuously subject to thermal, electrical and mechanical stresses over the course of their use. This fact inevitably leads - despite the use of durable materials - to increasing damage or ageing of the cable, which in turn leads to dielectric losses.
  • Page 40 Operating Modes Button / Description Menu item Frequency of the VLF test voltage (0.01 Hz to 0.1 Hz). A setting of 0.1 Hz is definitely recommended, since all the experience documented in the relevant technical literature or in the corresponding standards refer to this frequency as the diagnostic frequency.

  • Page 41: Course Of The Measurement

    Operating Modes 5.3.2 Course of the Measurement Test start Once all the settings have been made, the measurement can be started with the menu item . An instruction is then given in respect of the first phase to be connected (the smallest selected phase of the phase selection), which requires confirmation.
  • Page 42 Operating Modes Changing phases If more than one phase was selected before the start of the measurement, the test is during the course of interrupted after the measurement of a phase is completed and the user is prompted to the test connect the next phase.

  • Page 43: Evaluation Of The Test Results

    Operating Modes 5.3.3 Evaluation of the Test Results 5.3.3.1 Automatic Evaluation An automatic evaluation of the test results is only carried out if the following requirements have been fulfilled: • A standard for the evaluation of the test results has been selected. •...

  • Page 44: 5.3.3.2 Manual Evaluation

    Operating Modes 5.3.3.2 Manual Evaluation Introduction An automatic evaluation of the measurement results made by the software should be understood as a valuable tool, however by no means should it be used as a sole decision-making criterion. Criteria such as deviating measurement results within a cable system, the influence of leakage currents as well as outside influencing parameters can only be analysed to a limited extent by software.
  • Page 45 Operating Modes Evaluation of PE-based An insulation in good condition is indicated in PE-based cables (e.g. XLPE cables) by a cables low Δtanδ, which corresponds to a nearly constant tanδ over increasing test voltages. For an aged insulation, the tanδ value increases slightly with increasing voltage. For a critically aged insulation, the tanδ...
  • Page 46 Operating Modes Evaluation of EPR EPR cables by their nature exhibit a higher dielectric loss factor as compared to cables PE-based cables. However, this is still below the level of PILC cables. The limits specified in the following table are to be regarded only as guide values only: Mean value σ...

  • Page 47: Completing The Work

    PC and can be downloaded from the user area of www.sebakmt.com. Shutting down the test After the measurements on a cable have been completed, the VLF SIN-45 test system system can be switched off by pressing the ON/OFF button When disconnecting the test system, proceed in reverse sequence to the manner in which the connection (see page 19) was made.

  • Page 48: Combination With Other Test Systems

    PDS 60 PD measurement system. If you require more exact information about the characteristics and prices of the PDS 60 partial discharge test system, please do not hesitate to approach your Megger sales partner.

  • Page 49: Maintenance And Repair

    If the fuses are defective, they must be replaced with suitable microfuses (5 x 20 mm) of the type T6.3A. If the fuses continue to trip, please get in touch with the Megger service department in order to have the problem resolved.
  • Page 50 Maintenance and Repair...
  • Page 51 Maintenance and Repair 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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