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Ramp time parameter is required to adjust during commission in order to have enough Torque to driving the fan to reach synchronous speed ( Power=2x3.1416xTx N/60 ). Suggest to have Power electronic module at one step bigger size than motor rated due to It is taking higher current to maintain...

Generator shall be tripped if frequecy is out of over/under settings. Please check setting of Frequency relay 81 which may be embedded this function in Generator control panel.

I like to withdraw my comment due to i missed understood it was MCB not MPCB

Your Power generator was dropped down to 1000x 0.3 =300 kw only.

@mustafa_ismail Since you had already proven it was spurious signal.Let check your Instrument grounding resistance is in acceptable figure as well as Electrical grounding. Other options are checking your signal cable is closed or crossed the Power cable in order to avoid magnetic interference...

MPCB was burned from lossen wire, MPCB was damged or fault current over the MPCB|'s spec. Please check heater cables and MPCB by Megger test then you may find the root cause.

I understood you mean Actuator's Diaphragm has had high failures during startup. Burden pressure to this diaphragm is 70-5=65 barg at feed water temp 100 Deg.c cause it failure frequently during transition from cold to hot media. Suggest to use Pressure TX. with Globe control valve( EQ% type)...

to M Alif Fatullah : Unbalance are most likely come from one Blower 's air flow is higher than the other Blower cause back pressure to other blower operate at lower air flow. You can observe that total current consumption 20.76+34.8= 55.6 A is the same as before 27.28+27.38= 54.66 A. Most...

In addition, I had an experience with two water Pumps same spec. which are running in parallel to the same header. Either discharge Pump 's casing was always heat around 60 Deg.c compare with other pump mean that hot pump was operated flow against back pressure force from the other pump then...

Even same blower's specification but their Performance curve are unequalled. Higher head blower force back pressure to the other blower then it really need to have individual damper to equalize air flow from each blower which can be observed by current consumption to both motors. this is best...

Pls change " changeover the VFD Pump A instead of VFD pump B "to " changeover the VFD Pump B instead of VFD pump A.

I have understood that VFD has manual speed ref. you can select either external speed reference from MV of controller or speed ref. adjust from panel/DCS to VFD. Suggest to trial with following scheme that if you want to changeover the VFD Pump A instead of VFD pump B with less of impact to Flow...

Start cap. in single phase is used to bring lag current to lead current and syncronize with voltage then motor have high torque enough to rotate the equipment. No concern any damage to cap.start even you have direct start but life time of cap. is depend on how many times to start the motor. Soft...

(66.13 KVA x PF O.9 x EFF. 0.954 ) / 0.746 =76.1 HP

Water supply especially fire fighting function are quite critical in the Plant. Suggest to delegate one pump to fire hydrant directly without connect to other water distibution with pressure control all the time by Jocky pump ( NFPA it should have one Diesel Pump,Electric pump and Jocky pump)...

VSD( VVVF) is always is one step over rated of motor in order to supply higher current at lower speed ( low voltage than nominal power supply ) then cable sizing shall follow sizing of VSD as well.

Is it the same when you do power off the PLC and Power backout ? Please Check any PLC 's parameters is configured to default to Manufacturing in case of Power loss or check battery backup to dynamic ram if it have.

Grid was connected with Solar farm's Invertors which are foreseen that less of them install with Harmonic reduction. Harmonics from such Invertor export to the grid and may cause interfere Protection relay or Electronic device are being out of order or short life time. Install A.C. power filter...

This is Back EMF phenomena when cut-off the Power.

If you use megger test with apply higher voltage than nominal voltage ( 460 v ) then you may get warning or low resistance under acceptable level all the time you test it. Since your cable condition is low resistance then heat in cable from intermittant high current ( load current ) may cause...