What is the control range of firing angle in ac voltage controller with rl load?

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Define various modes of operation of timer.

0 Answers  

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We are facing the problem of communication failure between seimens drives and ABB DCS. Between drives and DCS on RLM -01 module for communication purpose. We found red blinking i.e error blinking in RLM -o1 module. So we replaced with new one but after one month same problem again came. So again we installed old RLM-01 module. Now also RED blinking is coming but sometimes drives are not tripping. What will be the cause for this problem?

0 Answers   DSPM,

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how can trace the fault in any PCB? what are the steps to find problem & to troubleshoot?

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2. What is the command to lock the TRX

0 Answers   NSN,

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please send me last year question for executive tranees in ntpc on my email ID rajthakur2091@gmail.com

0 Answers   NTPC,

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what is the rolls rolls of an Engineer?

1 Answers  

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Give the expression for the vco free running frequency.

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19. Name different types of TRXs which supports different GSM bands 20. ODU LED shows orange – what is the significance?

0 Answers   NSN,

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Digital Communication has so many advantages over Analog communication then why do we use Analog Communication

4 Answers  

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what is the use of -3 db frequency?& why does it exist in filters?

1 Answers  

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Why 16 Signaling links are the maximum links between two GSM switches?

1 Answers   Ericsson,

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