Am using an electronic digital display to see the RPM of ABB ACS 550 drive, which is showing negative value when the motor & drive in stop mode but it is showing correct value during the run mode. can anyone help me out??

2 Answers   Bala Power Solutions,

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why capacitors cant used in genset to maintain power factor..??

2 Answers  

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Testing procedure of DG alternator stability test

0 Answers   Amprotec,

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What is the difference between UPS and SMPS?

7 Answers   Mukand, NightFox,

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What Should be the value of Vector Surge angle at Tripping and how to calculate it?

0 Answers  

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phase association of 3PH L&T static CT meter is wrong. means 1PH & 1 CT connected properly and other 2 voltage and CT's inter changed. what would be the impact in the reading?

3 Answers   KSEB,

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kindly send me 11KV MV motor differential protection procedure by primary injection method.

0 Answers  

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what is consequences of neutral and earth connect?

0 Answers  

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In DC current-excitation to transformer, why it sucks more current? Eventhough there is no power transfer between primary and secondary? R is very low so it should suck less current only na thn y its current increases?

2 Answers   Cairn,

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Why 5kv megger used to megger 6.6kv motor or 33kv transformer why not 500v?

2 Answers  

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what you mean by current? what you mean by voltage? what is difference between star and delta connection in motor side?

2 Answers   Adani,

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who many types of fire explane with exmple

0 Answers   Juniper Networks,

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