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    Visar objekt (en) 21 - 30 av 166 Totalt
DLRO2 safety warnings
Safety warnings for DLRO2
Publicerad 14 juli 2020
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One touch OLTC with the TTRU3
Completing turns ratio tests on all transformer taps can be a cumbersome process. With One Touch OLTC from the TTRU3, anyone can configure and test all taps within a few short minutes.
Publicerad 22 april 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.
Publicerad 20 februari 2020
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DCM305E Earth Leakage Clamp Meter
p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 10.0px Times} span.s1 {font: 10.0px Helvetica} Eftersom en helt perfekt isolation inte är möjlig kommer viss ström att flyta till jord från en ledare som har en högre potential än jord.
Publicerad 30 september 2019
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A guide to conductor resistance testing of rotating machine stator with MTO106
Measuring the DC conductor resistance of a rotating machine stator can reveal a lot of information about the machine. It is always desirable to find out the existence of any resistance that is higher than the nameplate value which might be caused by poor joints, corrosion or mechanical deformation of the stator winding.
Publicerad 20 september 2019
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Power Cable Fault Locating Safety Notice
Publicerad 20 september 2019
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DC test of vacuum integrity in MV switchgear
Since the 1950’s vacuum has been used as insulation media in switchgears. Even though that technology has proven to be very reliable, over time air will leak into the vacuum chamber and degrade the insulation. Also, a good practice is to measure after transport or accidents. The accepted way to test the vacuum integrity has always been through a voltage withstand test. For field tests DC test is preferred due to the weight andsize of the instruments.
Publicerad 19 september 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?
Publicerad 22 augusti 2019
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SVERKER900 - Testing-ROCOF-protection
Rate Of Change Of Frequency (ROCOF) protection is used in distributed or embedded generation schemes, where a local generator is connected directly to the distribution network, as specified in national standards such as Ansi 81R or G59/3
Publicerad 15 maj 2019
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SVERKER900 - Testing ABB Trip Circuit Supervision relay
Check trip on relay with ABB supervision relay
Publicerad 15 maj 2019
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