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sebaKMT T 26/1 A Instruction Manual

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Instruction Manual
HV TEST SET
T 26/1 A
T 26/1 B
Mess- und Ortungstechnik
Measuring and Locating Technologies
Elektrizitätsnetze
Power Networks
Kommunikationsnetze
Communication Networks
Rohrleitungsnetze
Water Networks
Leitungsortung
Line Locating
- Date of release: 2003/ 29-

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  • Page 1 Instruction Manual HV TEST SET T 26/1 A T 26/1 B Mess- und Ortungstechnik Measuring and Locating Technologies Elektrizitätsnetze Power Networks Kommunikationsnetze Communication Networks Rohrleitungsnetze Water Networks Leitungsortung Line Locating - Date of release: 2003/ 29-...
  • Page 3 All rights reserved. No part of this handbook may be copied by photographic or other means unless SebaKMT have before-hand declared their consent in writing. The content of this handbook is subject to change without notice. SebaKMT cannot be made liable for technical or...
  • Page 4 SebaKMT also disclaims all responsibility for damage resulting directly or indirectly from the delivery, supply, or use of this matter.
  • Page 5 TERMS AND CONDITIONS OF WARRANTY SebaKMT accept responsibility for a claim under warranty brought forward by a customer for a product sold by SebaKMT under the terms stated below. SebaKMT warrant that at the time of delivery SebaKMT products are free from manufacturing or material defects which might considerably reduce their value or usability.

  • Page 6: Table Of Contents

    3.1.5. Installing the discharge switch ..........49     3.2. Controls ..................50     3.3. Performing measurements with the T 26/1 A ....... 54     3.3.1. Cable testing ................. 54     3.3.1.1. Directions in brief ............54  ...
  • Page 7 3.3.1.2. Directions ............... 55     3.3.2. Surging .................. 57     3.3.3. Burning .................. 58     3.4. Performing measurements with the T 26/1 B ......59     3.4.1. Cable testing ................. 59     3.4.1.1. Directions in brief ............59  ...
  • Page 8 LIST OF ABBREVIATIONS Deutsches Institut für Normung German Standards Institute High Voltage International Electrotechnical Commission Unfallverhütungsvorschrift Accident prevention regulations applicable in Germany Verband Deutscher Elektrotechniker Association of German Electrotechnical Engineers...
  • Page 9 ELECTROMAGNETIC COMPATIBILITY OF THE HIGH VOLTAGE TEST SETS T 26/1 A, T 26/1 B The high voltage test sets T 26/1 A and T 26/1 B comply with the requirements of EN 55011 concerning conducted emission voltages on the mains supply.
  • Page 10 CHAPTER 1 GENERAL...

  • Page 12: General

    GENERAL 1.1. Safety instructions All persons involved in the installation, operation, maintenance and repair of this system must have read this user manual carefully. The instrument and all additional equipment are in accordance with the current state of safety technology at the time of delivery.
  • Page 13 Regular checks must be made to ensure that the relevant safety regulations are being complied with during operation and maintenance. The instrument may only be operated by authorised persons with the appropriate skills. Only operate the system if it is in technically perfect condition. No non-original parts may be used for the instrument and its peripherals, as the necessary safety will not otherwise be guaranteed.

  • Page 14: General Safety Regulations

    1.1.1. General safety regulations Fuses The patching or bridging of fuses is forbidden, as is the use of patched fuses. When replacing fuses, only use replacements with the same or a smaller rated current strength and action (slow, quick, super-quick). Fitted bolts must not be replaced with ones for fuses with a higher rated current strength.
  • Page 15 Handling regulations for connectors Movable electrical plant must only be connected using the connectors (plugs, sockets) provided. The use of adapters and plugs which fit sockets of a different voltage is not permissible. When replacing connectors, care must be taken that the terminals are connected in proper phase.

  • Page 16: General Rules For Working With High Voltages

    1.1.2. General rules for working with high voltages Working with high-voltage devices and systems demands special care. This is particularly true of mobile operation, i.e. if the accommodation in question and its equipment do not ensure safety with permanent safety devices from the outset. VDE Regulation 0104 "Installation and operation of electrical test systems"...

  • Page 17: Supplementary Instructions

    1.1.2.1. Supplementary instructions The following supplementary instructions are not taken directly from the regulations. To avoid dangerous charges, all metal parts in the vicinity of a high-voltage system must be grounded. Special care is required in the case of mobile operation in this respect. Do not disconnect while live (risk of arcs).

  • Page 18: Indications Used In The Description

    1.1.3. Indications used in the description Important instructions concerning personal protection, work safety and technical safety are indicated as follows: WARNING: Warning indicates work and operating procedures which must be complied with in full to exclude the possibility of persons being put at risk.

  • Page 19: Connection Regulations

    1.2. Connection regulations WARNING: Establish protective earth connection in accordance with regulations before inserting mains plug! WARNING: System earth connection to shielding of test object! The system earth of the measuring van/mobile pallet should be connected to the earthed cable shielding of the test object, or if that is not directly possible, to the connecting line to the earth connection as a matter of principle.
  • Page 20 CHAPTER 2 TECHNICAL DESCRIPTION...

  • Page 22: Technical Description

    TECHNICAL DESCRIPTION 2.1. Application The T 26/1 A or T 26/1 B test set was developed for operating insulation testing of high-voltage systems and cables. Two variants with different power outputs are available to cater for the different tasks and requirements:...

  • Page 23: Specifications

    2.2. Specifications 2.2.1. T 26/1 A HV test set Output DC voltage Idling: max. 400 kV at load of 4.0 mA: max. 350 kV Short-circuit current: 200 mA ± 10% arithmetical mean 300 mA ± 10% Voltage display: 60 kV...480 kV...

  • Page 24: T 26/1 B Hv Test Set

    2.2.2. T 26/1 B HV test set Output DC voltage Idling: max. 650 kV at load of 3.5 mA: max. 600 kV Short-circuit current: 200 mA ± 10% arithmetical mean 290 mA ± 10% Voltage display: 60 kV ... 720 kV Current display in 5 ranges 0.1 mA, 1 mA, 10 mA,...

  • Page 25: Specifications Of Equipment Parts

    2.2.3. Specifications of equipment parts Description Type Dimensions Weight mm (inches) kg (lbs) Basic stage T 25/13 225 x 250 x 250 50 kV (8¾ x 9¾ x 9¾) (20) Normal stage T 25/15 225 x 250 x 250 50 kV (8¾...
  • Page 26 Description Type Dimensions Weight mm (inches) kg (lbs) Bipod T 26/191 150 x 1700 (6 x 67) Bipod T 26/196 B 2850 x 260 x130 (112¼ x 10¼ x 5) (31) Pallet H 904 1550 x 550 x 380 (61 x 21¾ x 15) (79) Cross-arm H 905...

  • Page 27: Equipment Parts / Scope Of Supply

    2.3. Equipment parts / scope of supply T 26/1 A Description Type Code no. Connection cable K 007 893020678 Terminal 0406 893020642 Operation unit (up to 400 kV) T 26/110- 892495872 Operation unit (650 kV) T 26/110 892486970 Electrolyte for liquid resistor...
  • Page 28 T 26/1 A Description Type Code no. HV connector 892530880 Cascade 200 kV, compl. T 26/141 892480395 (gas) Cascade 200 kV, compl. T 26/141 893020668 (gas) Cascade 200 kV, compl. T 26/143 892493403 (gas) Cascade 200 kV, compl. T 26/143...
  • Page 29 Connecting cable (7 m, K 202 893020655 19 pin) Connecting cable (15 m) K 202 S 893020673 Liquid resistor T 26/195 893020670 Liquid resistor for 400 kV T 26/190 892493608 (travelling wave protection) Corrugated hose H 907 893020662 (10 m, for corona shield) Tension member I, compl.

  • Page 30: T 26/100 Operation Unit

    2.4. T 26/100 operation unit The T 26/1 A and T 26/1 B HV test set consists of a T 26/110 operation unit, a T 26/100 basic unit and, depending on the voltage required, various combinations of high-voltage cascades and accessories.
  • Page 31 The thyristor inverter is protected by an input choke and automatic cut-out in such a way that the permitted surger currents will not be exceeded even if both thyristors are ignited simultaneously by noise pulses. Automatic current measuring range switching has four measuring ranges of 0.1 mA, 1 mA, 10 mA and 100 mA.
  • Page 32 Measuring ranges T 26/1 A 100 kV 36 kV 60 kV 120 kV 150 kV 60 kV 120 kV 180 kV 200 kV 60 kV 120 kV 180 kV 240 kV 400 kV 120 kV 240 kV 360 kV 480 kV...

  • Page 33: T 26/100 High-Voltage Basic Unit

    2.5. T 26/100 high-voltage basic unit 2.5.1. Structure The T 26/100 high-voltage basic unit contains a high-voltage transformer, the first cascade capacitor and devices to protect against excess voltage peaks. The high-voltage unit is made up of the T 26/100 or T 26/100 B basic unit and various cascade combinations with accessories, depending on the voltage required.

  • Page 34: Working Method Of High-Voltage Unit

    2.5.2. Working method of high-voltage unit The T 26/100 basic unit contains the high-voltage transformer, the first surge capacitor, devices to protect against high-voltage peaks and a fan to prevent the transformer from overheating. This task is also performed by a temperature sensor, which switches the system off in the event of overheating.

  • Page 35: Safety And Warning Device

    The safety device is connected between the general power supply and the mains input of the T 26/1 A (see fig. 1 to 4). Green indicator lamps signal readiness for operation. If the test equipment is activated using the key-operated switch, red indicator lamps mark the danger area.

  • Page 36: Configuration And Test Set-Up

    2.7. Configuration and test set-up Fig. 1 T 26/1 A configuration and test set-up, 100 kV N.B.: This configuration is mainly intended as a fixed installation in the measuring van. An additional discharge device is necessary if this configuration is set separately, e.g.
  • Page 37 Fig. 2 T 26/1 A configuration and test set-up, 150 kV N.B.: This configuration is mainly intended as a fixed installation in the measuring van. An additional discharge device is necessary if this configuration is set separately, e.g. discharge resistor 0531...
  • Page 38 Fig. 3 T 26/1 A configuration and test set-up, 200 kV...
  • Page 39 Fig. 4 T 26/1 A configuration and test set-up, 400 kV N.B.: T 26/191 B bipod without measuring resistors.
  • Page 40 Fig. 5 T 26/1 B configuration and test set-up, 650 kV...
  • Page 42 CHAPTER 3 OPERATION...

  • Page 44: Operation

    OPERATION 3.1. Start-Up Before the equipment is put into operation, the usual safety regulations governing the operation of high-voltage equipment must be complied with. The equipment carries high voltage and its operation demands detailed knowledge of the information contained in the user manual. All equipment components should be moved without hoists.
  • Page 45 The operating ground terminal should be connected directly to the cable sheath. The protective ground terminal should be laid to the ground potential where the operator is (frame ground) for safety reasons. The operation unit and high-voltage unit should be connected with the cable provided. Care must be taken that there is a large enough safety gap between the two units.

  • Page 46: Minimum Distances When Setting Up Equipment

    Minimum distances when setting up equipment N.B.: The distances in brackets apply exclusively to the T 26/1 A set. When setting up the equipment, care must be taken that there is a gap of at least 1.2 m (1 m) between the live parts.
  • Page 47 T op view  1.4 m  1.2 m) WARNING: Da ta in b rac kets for T 26/ 1 A only S ide view  1.4 m  1.2 m)  1.2 m (  1 m) T 2602.DRW Fig.

  • Page 48: Fitting The Cascades

    WARNING: Da ta in b rac kets for T 26/ 1 A only  1.4 m  1.2 m  1.2 m)   1 m)  1.2 m  1 m) T 2603.DR W Fig. 8 Vertical liquid resistor set-up 3.1.3.

  • Page 49: Installing The Discharge Switch

    Horizontal set-up Hook one end of the liquid resistor into the slot of the corona cover with the bolt and place the other end on the bipod. The liquid resistor must be checked for gas bubbles before the equipment is put into operation. If gas bubbles have formed, turn the liquid resistor upright and allow the bubbles to rise.

  • Page 50: Controls

    Si 3 automatic cut-out (10 A B10) for thyristor inverter N.B.: If this is triggered during operation, the unit must be switched off before the automatic cut-out is switched back on [3]. [10] Control lamp for overheating of high-voltage transformer (T 26/1 A) or thyristor (T 26/1 B).
  • Page 51 [11] Timer, adjustable up to 60 minutes a) set the high voltage to the required value b) set the timer to the right test time The high voltage is switched off when the timer runs out. [12] Rough voltage setting This adjuster must be turned as far anticlockwise as it will go before the high voltage is switched on, otherwise start-up will not be possible.
  • Page 52 [17] Button switch with indicator lamp for measuring range selection. One of the measuring ranges must be selected before the high voltage is switched on [20]. a) Automatic measuring range switching for the 0.1 mA, 1 mA, 10 mA and 100 mA ranges. The active measuring range is indicated by the button lamp lighting up.
  • Page 53 [21] Mode switch T 26/1 A: a) Button out Surge, burn and test with reduced power mode In this mode the unit is short-circuit proof and works until overheating shutdown. b) Button in Test with rated power mode The maximum power at rated voltage can be taken from the unit (300 kV / 5 A).

  • Page 54: Performing Measurements With The T 26/1 A

    3.3. Performing measurements with the T 26/1 A 3.3.1. Cable testing N.B.: If surge or burn mode is to be used repeatedly, compact installation in a measuring van or on a measuring pallet is recommended. This would include all the safety devices such as excess voltage protection, etc.

  • Page 55: Directions

    If the test power is not sufficient after cable charging, press the mode switch [21] and turn to test = mode (see 3.2. [21]). Preset timer [11] to required time. Press button [20] and set voltage to required value with the voltage adjusters [12] and [14].
  • Page 56 The charging current during running up and the test discharge current are very different. However, automatic current measuring range switching ensures that the right current measuring range is always selected. The operator can concentrate fully on the voltage setting. The required test time can be preset using the timer [11]. See section 3.2.

  • Page 57: Surging

    A liquid resistor is not suitable. A capacitor unit with working and protective spark gaps is connected to the high-voltage output of the T 26/1 A. The protective spark gap must be parallel to the capacitor and the working spark gap must be between capacitor and cable (see fig.

  • Page 58: Burning

    The protective spark gap must be set to the maximum permitted voltage for the cable or surge capacitor. The faultless functioning of the protective spark gap must be tested beforehand with the working spark gap well apart. The necessary flashover voltage, i.e. surge voltage, is set with the working spark gap, while the voltage setting on the operation unit determines the surge rate.

  • Page 59: Performing Measurements With The T 26/1 B

    3.4. Performing measurements with the T 26/1 B 3.4.1. Cable testing 3.4.1.1. Directions in brief Connect switch box for T 26/170 B warning device to connection [1]. A corona shield must be fitted for equipment configurations of 400 kV and above. Connect protective grounds, connecting cables and mains lead.

  • Page 60: Directions

    Switch to test mode (press button [21]). For a more detailed description see section 3.4.1.2. Preset timer [11] to required time. Set voltage to required test value with the voltage adjusters [12] and [14]. 3.4.1.2. Directions N.B.: The H 913 corona shield must be fitted before start-up, as otherwise there will be a risk of flashovers.
  • Page 61 The required test time can be preset using the timer [11]. See section 3.2. [11]. When this time expires, the equipment shuts down automatically. To make it possible to ascertain later whether the equipment was shut down earlier by excess current triggering, the control lamp [15] will remain on in this eventuality until the equipment is restarted or switched off.

  • Page 62: Measurement Up To 650 Kv

    3.4.2. Measurement up to 650 kV The T 26/1 B test set should be set up as shown in fig. 5. Care must be taken that live parts of the equipment, including the connecting hose, have a large enough safety gap of at least 2 m to grounded parts.
  • Page 64 CHAPTER 4 CARE, MAINTENANCE AND REPAIR...

  • Page 66: Care, Maintenance And Repair

    CARE, MAINTENANCE AND REPAIR 4.1. Care and maintenance The HV test set requires no maintenance. The housing surfaces and controls should be cleaned with a mild cleaning agent. Naphtha, acetone, lyes or similar agents must not be used under any circumstances, as they attack the housing surfaces and possible equipment failure cannot be ruled out.
  • Page 68 APPENDIX...
  • Page 70 Fig. A-1 T 26/110-02 controls Fig. A-2 T 26/110 B controls...

This manual is also suitable for:

T 26/1 b

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