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

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    Visar objekt (en) 1 - 10 av 129 Totalt
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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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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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 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
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SVERKER900 - Testing directional earth fault
Directional earth fault protection are commonly used to protect long outgoing feeders from tripping because of fault on other outgoing lines.
Publicerad 15 maj 2019
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BVM150/300/600 - BVM system/connections
BVM150The system consist of 16 BVM units. Power & Signal Connector. Power supply.16pcs. Ethernet cables 0,5m. Ethernet cable 2m. USB extension cable 2m. 16 pcs. Dolphin clips(15 pcs. Black, 1 pcs. red). Art no CJ-59092. 16 pcs. extension cable, Art no 04-30050.BVM300The system consist of 31 BVM units. Power & Signal Connector. Power supply. 31pcs. Ethernet cables 0,5m. Ethernet cable 2m. and 3m. USB extension cable 2m. 31 pcs. Dolphin clips (30 pcs. black, 1 pcs. red). Art no CJ-59093. 31 pcs. extension cable, Art no 04-30050.BVM600The system consist of 61 BVM units. 1pcs. Power & Signal Connector. Power supply. 61pcs. Ethernet cables 0,5m. Ethernet cable 2pcs. 2m and 2pcs. 3m. USB extension cable 2m. 61 pcs. Dolphin clips (60 pcs. black, 1 pcs. red). 2pcs. Art no CJ-59096. 61 pcs. extension cable, Art no 04-30050.BVM special 600VThe system consist of 46 BVM units. 2pcs. Power & Signal Connector. 2pcs. ungrounded power supply. 46 pcs. Ethernet cables 0,5m. 2pcs. USB extension cable. 2pcs. Opto coupler. Dolphin clips (44 pcs. black, 2 pcs. red). Art no CJ-59198. 46 pcs. extension cable, Art no 04-30050.
Publicerad 25 februari 2019
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Vanliga problem med strömkvalitet: Transienter
En transient defi nieras enligt IEEE 1159 som ett fenomen eller en kvantitet som varierar mellan två efterföljande jämviktstillstånd under ett kortare tidsintervall sett till den aktuella tidsskalan. En transient kan vara en enkelriktad puls med valfri polaritet eller en dämpad oscillerande våg med den första toppen i endera polaritet.
Publicerad 25 januari 2019
Circuit Breaker Online Condition Assessment including 1st trip, DRM and vibration
First trip analysis is a crucial tool to anticipate faults before they become critical, and to minimise disruption. Today’s circuit breaker analysers are very versatile. They can be configured to suit specific requirements, ensuring that users never pay for features they don’t need.
Publicerad 9 augusti 2018
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Working with fault monitors
A look at testing DC bus systems using the BGL/BGFT.
Publicerad 9 augusti 2018
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  • Visar objekt (en) 1 - 10 av 129 Totalt