Menu
Support
Bibliotek

Bibliotek

I biblioteket hittar du allt från applikationsnoter till skrivna artiklar. (Merparten är skrivet på engelska).

Använd sökfiltren för att bläddra för ett specifikt innehåll (t.ex. applikationsnoter) eller förfina din sökning till ett visst applikationsområde.

Om du vill se innehållet som vi har tillgängligt om ett visst ämne eller behöver hitta någon programvara, skriv bara in en sökning nedan. Observera att du måste skapa ett användarkonto för att få tillgång till vissa delar av innehållet. 

Filtrera efter typ av dokument
    Visar objekt (en) 1 - 10 av 144 Totalt
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
Ladda ner PDF
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
Ladda ner PDF
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
Ladda ner PDF
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.
Publicerad 20 september 2019
Ladda ner PDF
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
Ladda ner PDF
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
Ladda ner PDF
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
Ladda ner PDF
SVERKER900 - Testing ABB Trip Circuit Supervision relay
Check trip on relay with ABB supervision relay
Publicerad 15 maj 2019
Ladda ner PDF
SVERKER900 - Testing impedance based protection
The impedance measurement schemes are widely used for protection of different assets within electric power systems. Relay protection devices utilizing such schemes are benefiting from continuous monitoring of both voltage and current quantities within the protected circuit and the calculated impedance value is employed to determine whether the circuit is operating in a normal condition or not.
Publicerad 15 maj 2019
Ladda ner PDF
SVERKER900 - Testing negative sequence overcurrent protection
Unbalance phase currents in a power system that exceed the allowable normal operation limit can indicate abnormal condition or even existence of fault(s) in the system. The operating principal unbalance over current protection is normally based on measurement of negative sequence component of unbalance phase currents. Similar to phase over current protection, normally a pick up (start) threshold and a definite time delay for operation can be set.
Publicerad 15 maj 2019
Ladda ner PDF
  • 1
  • 2
  • 3
  • 4
  • 5
  • ...
  • >
  • Visar objekt (en) 1 - 10 av 144 Totalt