Megger T 22/1 Instruction Manual
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Megger T 22/1 Instruction Manual

Megger T 22/1 Instruction Manual

Ac voltage test set
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Instruction Manual
AC Voltage Test Set
T 22/1
Subject No: 128312849
- Date of release: 4 (03/2011) -

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Summary of Contents for Megger T 22/1

  • Page 1 Instruction Manual AC Voltage Test Set T 22/1 Subject No: 128312849 - Date of release: 4 (03/2011) -...
  • Page 2 man_t22-1_en_04-4...
  • Page 3 AC Voltage Test Set T 22/1 man_t22-1_en_04-4...
  • Page 4 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. Megger also disclaims all responsibility for damage resulting directly or indirectly from the delivery, supply, or use of this matter.
  • Page 5 This warranty does not cover any fault in the software supplied. During the period of warranty, Megger will repair faulty parts or replace them with new parts or parts as new (with the same serviceability and life as new parts) at their option.
  • Page 6 D-01471 Radeburg Germany declare under sole responsibility that our product 75 kV AC Voltage Test Set T 22/1 is in conformity with the Directive of the Council of European Communities for the Harmonization of the Laws of Member States on Electromagnetic Compatibility (EMC Directive 89/336/EEC).

  • Page 7: Table Of Contents

    2.3.1 Test Transformer T 22/12 ---------------------------------------------------- 22     2.3.2 Operation Unit T 22/124 ------------------------------------------------------ 22     Optional Extra AC Voltage Test Set T 22/1 ---------------------------------- 22     2.4.1 Product Versions --------------------------------------------------------------- 23     2.4.1.1 Version 1 (Standard 75 kV rms AC Test Set) --------------------------- 23  ...
  • Page 8 Trouble-Shooting ------------------------------------------------------------------ 36     TEST SET-UP     AC Voltage Testing --------------------------------------------------------------- 39     DC Voltage Testing --------------------------------------------------------------- 39     AC Voltage Testing up to 150 kV ---------------------------------------------- 40     man_t22-1_en_04-4...
  • Page 9 CHAPTER 1 GENERAL INTRODUCTION man_t22-1_en_04-4...
  • Page 10 man_t22-1_en_04-4...

  • Page 11: General Introduction

    GENERAL INTRODUCTION Safety Precautions Each person involved in the assembly, maintenance, and repair of this system is required to have read this manual carefully. At the time of supply, this set and its accessories are in line with the state of the art in safety control. In their operation there may be parts and places of the set, however, which cannot be protected properly without unreasonably interfering with their function and control.
  • Page 12 Never use any foreign part on the set and its peripherals since otherwise the indispensable degree of safety may be jeopardized. Do not carry out any operation which may put the safety of the set at risk. The user is obliged to immediately report any arising change in the set to the supervisor in charge.

  • Page 13: Ac Voltage Testing

    DC testing. The T 22/1 AC Voltage Test Set can be upgraded by adding a DC voltage adapter (optional extra) to form a DC voltage test set. The rectifier can be reversed thus allowing tests to be made with both polarities.
  • Page 14 According to VDE Regulations, test voltages for switchgear, either of metal design or encapsulated in insulating material, against earth over insulating series 10 28 kV 32 kV series 20 50 kV 60 kV series 30 70 kV 80 kV See also VDE 0670, Parts 6 and 7. The following table states common test object capacitances of electrical equipment with their required test output power.

  • Page 15: Test Set T 22/1

    Test duration is 1 minute. For this time, the T 22/1 Test Set supplies an output power of 4 kVA. As the above table shows, this output power is sufficient to test complete series 30 switchgear, i.e. the appropriate combination of components listed in the table.
  • Page 16 man_t22-1_en_04-4...
  • Page 17 CHAPTER 2 TECHNICAL DESCRIPTION man_t22-1_en_04-4...
  • Page 18 man_t22-1_en_04-4...

  • Page 19: Technical Description

    TECHNICAL DESCRIPTION Technical Specification Output voltage 0 to 75 kV rms with 2 transformers balanced to earth max. 150 kV rms Maximum test duration 1 kVA: without limit 2 kVA: 20 minutes 4 kVA: 1 minute Current rating 13 mA Short-circuit current max.

  • Page 20: List Of Items Supplied And Optional Extras

    List of Items Supplied and Optional Extras 2.2.1 Items Supplied AC Voltage Test Set T 22/1, Order number: 2502151 The standard equipment includes the following items: number name Order No 1 piece test transformer T 22/12 3020637 1 piece operation unit...

  • Page 21: Optional Extras

    AC Voltage Test Set T 22/1 with secondary current indication name Order No AC voltage measuring unit M 402/2 9000407 80 kV DC voltage test equipment T 22/1-Z, Order number: 2504480 number name Order No 1 piece rectifier attachment T 22/121 3020640...

  • Page 22: Test Set

    Apart from the transformer with adjustable primary, the Operation Unit contains a plug-in measuring unit with two meters for measuring voltage and current. Optional Extra AC Voltage Test Set T 22/1 In addition to the simplified standard mode of measuring voltage and current (indirect measurement), optional extras are available which allow voltage and current to be measured precisely and directly.

  • Page 23: Product Versions

    2.4.1 Product Versions 2.4.1.1 Version 1 (Standard 75 kV rms AC Test Set) Measuring unit M 402 Standard (measurement of primary voltage) Measurement of voltage: Measurement of HV transformer primary voltage and conversion into secondary voltage dial range 0...80 kV rms Measurement of current: Measurement of secondary current and conversion into primary current...

  • Page 24: Version 3 (Changeover)

    2.4.1.3 Version 3 (Changeover) Optional feature: Indication of secondary current Measuring unit M 402 / 2, Measurement of current modified Measurement of current: Measurement of secondary current indication of secondary current Replacement of dial 4 mA DC / 20 A AC with dial 4 mA DC / 60 mA AC 2.4.1.4 Version 4 (Upgrade to DC Voltage Test Set 80 kV)

  • Page 25: Version 5 (Upgrade To 150 Kv Rms )

    2.4.1.5 Version 5 (Upgrade to 150 kV rms ) with 2 transformers balanced to earth Measuring unit M 402 Standard (measurement of primary voltage) Measurement of voltage: Measurement of HV transformer primary voltage and conversion into secondary voltage Measurement of current: Measurement of secondary current and conversion into primary current dial range...
  • Page 26 man_t22-1_en_04-4...
  • Page 27 CHAPTER 3 OPERATING INSTRUCTIONS man_t22-1_en_04-4...
  • Page 28 man_t22-1_en_04-4...

  • Page 29: Operating Instructions

    OPERATING INSTRUCTIONS Controls Mains switch In position ”1” power is applied to all auxiliary circuits. Mains lamp repeater, white, lights up when (1) is in position “1“. Lamp repeater, red: “HV ON“, lights up after key (4) has been pressed. Key “HV ON“...
  • Page 30 Voltage indicator Use the correction chart to eliminate the voltage increase caused by the capacitance of the test object and so improve the precision of your measurement (applies to standard measuring unit M 402 only). Voltage display range switch (M 401 only) Use this switch to toggle the display range of the voltage indicator (6) between 120 kV and 60 kV.

  • Page 31: Note

    Lamp repeater for failure indication lights up when the test transformer is thermally overloaded or gas pressure has fallen to an inadmissible level. Variable transformer for supplying the primary voltage to the test transformer. Timer for presetting the test time (up to 4 minutes). HV is automatically disabled after the test time ran out.

  • Page 32: Dc Testing

    3.3.2 DC Testing There is no automatic discharging of the test object! Use discharge rod 75/80 kV to discharge your test object (e.g. cable or capacitive charge store) manually after the test set has been switched off. Make sure the earthing cable is connected with station earth or system earth when the set is installed! Note: Please take into consideration that when the DC test circuit is...

  • Page 33: Special Characteristics Of An Ac Test With Two Transformers (150 Kv Rms)

    3.2.3 Special Characteristics of an AC Test with Two Transformers (150 kV rms) As both connection points are voltage-carrying during an AC test with two transformers, the test must be conducted earth- free. This means that no point of the complete test circuit may have contact to earth potential! a) Current measurement Because both primary windings are supplied from the network...

  • Page 34: How A Test Is Conducted

    3.2.4 How a test is conducted 1. Switch mains switch (1) on, make sure the automatic circuit breaker (5) is on. 2. The white lamp repeater (2) lights up. 3. Move the switch for the series resistor (17) to position “ O “. 4.

  • Page 35: Correction Chart

    Correction Chart Voltage Meter M402 true voltage PRIM 20 10 measured man_t22-1_en_04-4...
  • Page 36 Trouble-Shooting When the automatic circuit breaker (5) has tripped (e.g. due to flash-over or overload), just switch it on again and continue testing. Lamp repeater (18) will light up when the test transformer has been overloaded. You have to wait for the lamp to go out before you are able to continue testing.
  • Page 37 CHAPTER 4 TEST SET-UP man_t22-1_en_04-4...
  • Page 38 man_t22-1_en_04-4...
  • Page 39 TEST SET-UP AC Voltage Testing L 909 0137 0406 0319 T 22/12 L 304 220 V K 001 0403 0313 T 22/124 M 402 DC Voltage Testing 0137 L 909 T 22/121 0403 0406 0319 T 22/12 T 22/122 L 304 K 001 220 V 0313...
  • Page 40 AC Voltage Testing up to 150 kV Note: The connection adapter A 504 must be used to connect the T 22/124 and the two test transformers T 22/12. man_t22-1_en_04-4...
  • Page 41 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...

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