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    Prikazivanje stavke (stavki) 1 - 10 od 10 ukupno
Measuring cable impedance with SVERKER900
This is an easy solution to measure the impedance values for cables, the values are used for calculation of compensation factor in distance protection.The compensation factor is first theoretically calculated and these values can now be compared with the measured values.
Objavljeno: 14 decembar 2020
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Preventive maintenance of rolling stock
The test and maintenance of electrical components on rolling stock is not an easy job to do. Some maintainers dismount some of the parts and bring them to a central location for revision and maintenance. This is a cumbersome and time consuming exercise. In many cases, the electrical parts are replaced only when they break down and are not subject to periodical testing. This of course holds a risk as some parts, e.g. circuit breakers, are crucial for safety reasons.
Objavljeno: 3 novembar 2020
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Case Study on IDAX300 and VAX020
The Power Grid Corporation of India Limited (PGCIL) is an Indian state-owned company headquartered in Gurugram (North India) engaged mainly in Trans-mission  of  Power  and  transmits  about  50%  of  the  total  power  generated  in  India  on  its  transmission  network.  The  company  owns  and  operates  about  1,61,790  circuit  kms  of  transmission  lines  at  800/765 kV,  400 kV,  220 kV  &  132 kV EHVAC and +500 kV HVDC levels and 248 sub-stations. Also, it has the transformation capacity of about 396 825 MVA as of 30th November 2019.
Objavljeno: 26 avgust 2020
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DLRO2: long test lead test mode
When measuring very low resistance the four-wire test method has for many years been the standard method. The main advantage being that it simply and easily removes the resistance of the test leads from the measurement. However, what happens when those test leads need to be verylong?
Objavljeno: 27 jul 2020
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DLRO2: new difference meter
Introducing the first low resistance ohmmeter to feature a difference meter, a device that turns changes in resistance into a moving pointer and percentage change. When testing multiple similar connections, it makes it easy to spot those small increases in resistance that eventually turn into major faults.
Objavljeno: 27 jul 2020
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DLRO2 safety warnings
Safety warnings for DLRO2
Objavljeno: 14 jul 2020
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TTRU3 Calibration verification
When performing calibration verification of the TTRU3, the following factors need to be considered to achieve accurate measurements and prevent damage to your calibration fixture or TTRU3.
Objavljeno: 20 februar 2020
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Power Cable Fault Locating Safety Notice
REQUIREMENTS FOR SAFE WORK ENVIRONMENT WHEN PERFORMING MV or LV POWER CABLE FAULT LOCATING BY DISCHARGING A HIGH VOLTAGE CAPACITOR.
Objavljeno: 20 septembar 2019
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TTRU3 Phase Shifting Transformer App note
The is capable of performing turns ratio tests on any phase shifting transformer by allow-ing for phase shifts to be entered with respect to the secondary winding. But with all of the differ-ent ways phase shift is expressed, how do you know if the entered phase shift value is correct?
Objavljeno: 22 avgust 2019
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Power swing detection/trip testing in IEDs using smart testing methodology
Power swing which is principally caused by an oscillation in active and reactive power of transmission line, consequent to an enormous disruption in power system, which if not blocked, could cause wrong operation to the distance relay which may lead to tripping the healthy part of the transmission line. In the absence of power swing function it may result in severe damage to the machines or cascading tripping in the grid resulting in blackouts. To prevent such scenarios, intelligent electronic devices (IEDs) have power swing block (PSB) detection and trip logics incorporated with distance schemes. 
Objavljeno: 12 jul 2019
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