Reply
Highlighted
New member

Re: Voltage Drop for Over 1 Minute

Abdul,

 

At the moment where the voltage drops, how does the RPM look like ? does that also drop.

Contributor

Re: Voltage Drop for Over 1 Minute

Genset Engine Model serial number and arrangement number.. Frequency? Nominal RPM? Type of govern system? This unit being operated single or paralled to other units?. any fault codes ?
New member

Re: Voltage Drop for Over 1 Minute

Sir,

At around 1600 hrs. voltage was dropped to 360 v at 900 rpm. Changed over to gen. no. 1.

Repeated 3 times now.. we checked electrical connection tightening
Contributor

Re: Voltage Drop for Over 1 Minute

Does voltage drop as soon as load is applied to the machine? engine rpm recovers fast enough? any shutdown codes? have the genset experienced this issue before? check all wiring to the dvr. check dvr droop ct polarity. measured the field voltage output and amp while testing sound just like bad avr sometimes trying to turn direct online high inductive loads cause this issue when reactive power overshoots are higher than genset capability. usually high setpoint in voltage gain would cause instability during different stages of load.
New member

Voltage Drop for Over 1 Minute

Dear sir,

 

Myself Abdul, its very nice to know that you are very expert on CAT MAchines,

please below is one issue i am facing in our factory with one of our Generator

 

Will appreaciate, please if you could give any valuble insights on this, 

 

Voltage Regulator pn 155-3832

 

Image

Voltage dropping some time from 400volts to 300volts and continue -sustained drop for over 60 seconds

 

please advise if i need to adjust the voltage gain adjustment,

if any manual or procedure would do,

 

kindly accept his as a request and give your expert opinion

 

regards

 

Abdul,

ISPC-1, KSA

robin.abdul@gmail.com