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Table of Content
[ General Conditions of Supply ]
 Haefely Test AG - General Conditions of Supply
[ Tettex Information ]
No. 50 - Measuring ratio on power transformers with higher test voltages (1.2 MB)
[ Application Notes ]
Automatic Impulse Current Routine Testing of Metal Oxide Arrestors (451kB)
Automatic Impulse Voltage Routine Testing of Distribution Transformers (226kB)
Versatile AC Test System (132kB)
Pattern Recognition for Partial Discharge Measurement (927kB)
[ Scientific Documents ]
Transient Phenomena in the Marx Multiplying Circuit after Firing the First Coupling Spark Gap (271kB)
The Firing Probability of Coupling Spark Gaps of the Multiplying Circuit according to Marx (218kB)
Increasing the Trigger Range of a Marx Generator by means of Auxilary Spark Gaps (90kB)
Breakdown Behaviour of Air Spark-Gaps with Non-Homogeneous Field at Bias Voltages (1314kB)
Influence of the Pre-Discharges on Breakdown Behaviour of the Negative Rod-Plane Spark-Gap at Standard 1.2/50 Impulse Voltages (201kB)
Influence of the source impedance on the breakdown behaviour of air spark-gaps (224kB)
Influence of corona discharges on the breakdown voltage of airgaps. (197kB)
A new type of voltage divider for the measurement of high impulse and a.c. voltages. (764kB)
Mechanism to explain the switching impulse phenomena. (1259kB)
Increasing the trigger Range of a Marx Generator by means of Auxiliary Spark Gaps. (455kB)
A new triggered multiple gap system for any kind of voltages (224kB)
From the glow corona into the breakdown (273kB)
Influence of humidity on the breakdown voltage of d.c. and a.c. voltages in air (383kB)
The generation of lightning and switching impulse voltages in the UHV region with an improved Marx circuit (502kB)
Measurement of partial discharges in high voltage apparatus with the balanced circuit (594kB)
Problems related to switching impulse generation at high voltages in the test plant (1229kB)
Dimensioning of electrodes in the UHV range illustrated with the example of toroid electrodes for voltage dividers (268kB)
An outdoor-impulse-generator for 5.6 Mill. Volt (640kB)
The calibration of partial discharge (PD) measuring circuits, accuracy and estimation of errors (322kB)
Normalized calculation of impulse current circuits for given impulse currents (1193kB)
Automation of high voltage impulse tests (617kB)
Long-duration impulse current generator for arrester tests according to IEC recommendations (946kB)
Circuit design of impulse generators for the lightning impulse voltage testing of transformers (2580kB)
Steep front impulse generators for EMP-simulation (1035kB)
Fast transient currents on the shields of auxiliary cables after switching operations in high-voltage substations and high-voltage laboratories (742kB)
High voltage testing of metal-enclosed, gas-insulated substations on-site with oscillating switching impulse voltages (1344kB)
Simulation of multiple lightning strokes in laboratory (696kB)
Actual problems and limitations on the measurements with dividers in the multi-megavolt range (395kB)
Elimination of the skin effect error in heavy-currents shunts (1359kB)
DC Test systems in the megavolt range (831kB)
Mobile EMP-System with High Flexibility (900kB)
Surge testing requirements analysis (491kB)
On-site high-voltage testing of metal-enclosed gas-insulated substations (1203kB)
The current status of high voltage impulse measurements (1670kB)
The Orgins, the Effects and the Simulation of Transients, as well as their International Standardization (3487kB)
Partial discharge measurements on power cables (760kB)
Partial Discharges (PD) in Capacitors (1453kB)
Electromagnetic Compatibility Testing of Electronic Components, Subassemblies, Measuring Instruments and Systems (1057kB)
6 MV Impulse-voltage generator for the high voltage test station of the Siemens Schaltwerk in Berlin (1263kB)
An impulse generator to simulate lightning effects on aircraft (835kB)
Test on high voltage metal oxide surge arresters with impulse currents (691kB)
On-site testing of high voltage equipment (1133kB)
Ultra-high voltage d.c. power supplies for large currents (991kB)
Impulse testing of power transformers using the transfer function method (2240kB)
High Power HVDC test equipment for pollution testing (781kB)
Testing of high voltage power cables with series resonant systems and water terminations (725kB)
Calibration of Digital Impulse Measuring Systems (941kB)
Permanent digital recording of PD impulses in an impulse analyzer (925kB)
Operating of Water Terminations for Testing Power Cables (583kB)
Computer-aided registration and analysis of partial discharge in high voltage insulation (1203kB)
Checking electromagnetic compatibility of a HV impulse Measuring circuit with coherence functions (1211kB)
An universal test equipment for metal-oxide surge arresters without gaps for AC systems according IEC (77kB)
A new solution for the extension of the load range of impulse voltage generators (405kB)
High voltage testing using series resonance with variable frequency (91kB)
Encapsulated test system insulated with SF6 (117kB)
Equipment for On-Site Testing of HV Insulation (274kB)
Performance and Calibration of High-End Impulse Analysing Systems (361kB)
Experience with a Mobile Resonant Test System for Testing of Installed Medium- and High Voltage Power Cables (271kB)
Experiences with Stationary and Mobile Calibration Laboratories (282kB)
Automatic Impulse Voltage Routine Testing of Distribution Transformers (916kB)
On-Site Testing of Gas Insulated Substation with AC Voltage (273kB)
Methods for Improving the Reliability of Non-Destructive High Voltage Testing (262kB)
Laboratory and On-Site Testing of Metal Oxide Arresters (543kB)
On-Site Impulse Tests and corresponding Measurement and Analysis Techniques for Power Transformers (447kB)
Digital HVDC Partial Discharge Testing (69kB)
The Transfer Function Method for Detection of Winding Displacements on Power Transformers after Transport, Short Circuit or 30 Years of Service (1070kB)
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