Search results for query: *

Hi, Is this wiring to Power meter is acceptable as per IEC? We have metering CT installed on upstream of MCCB and connected to power meter. Generally we install CT on Downstream of MCCB. So I got confused if it is acceptable as per IEC.

Hi, In ABB ACH580 VFD drive we have output relay RO3 which I'm using for fault signal. The relay got contact 25, 26 and 27 terminals. 25 and 26 are NC. 25 and 27 are NO. I'm using fault(-1) option means inverted fault and they recommend to use NO terminal which is 25 and 27. Im confused. My...

Hi All, we have 2 numbers of Low voltage MCC kept inside a shelter in outdoor tankfarm area. The Dimension of the shelter is 5m length, 3m Width and 3m height. Does this small Shelter requires lightning protection as per IEC standard? There are Tanks and high structures are there in this tank...

Hi, The power meter's voltage input shall be taken from Primary or secondary side of the Main Circuit breaker? In this Schematic they shown on Primary side of the Circuit breaker. Is it okay?

Hi, Any IEC standard stating the requirement of Fire resistant cables in Hazardous Zone areas?

Hi, Today one of the Schneider make MPCB (GV2L04) rated for 0.63A burnt inside our panel. This circuit breaker was feeding to a 150W single phase (230V) motor. We have used Tesys T LTMR for DOL starter. When the incident happened, it was raining heavily. We suspect that the water leaked...

Hi, We have a motor control center panel with power meter mounted on it. The power meter reading shows that the power factor of Bus A is 0.5Lag and Bus B is 0.3Lead. How dangerous is this? any Why the this occurred? What's the solution?

Hi, Below snaps are taken from Schneider power meter mounted on 250kW ATV630 VFD showing harmonics. Please explain in detail why 5th order harmonic is larger than 3rd order? What shall I do next?

Hi, I have ATS48 Softstarter circuit as shown in the attached PDF. In "Manual" mode, I can start the motor from MCC Start button and the "Run" Logic input in the Starter received signal so it closed R1 and subsequently R2 dry contacts inside the Starter so K1 and K3 contactors energized and the...

Hi, What terminals to use for Remote selected in ATS48 soft Starter?

I have a main UPS power DB with ELR (500mA). This main DB-01 feeding control supply to some PLC,VFD and a Sub UPS DB-02. The Sub UPS DB-02 has multiple outgoing circuits with MCB and RCCB (300A) in each circuits. Suddenly my UPS main DB-01 tripped by ELR. No RCCB tripped in sub UPS DB-02. How...

Hi, I have a 230V Power DB which is feeding the 230V control supply to PLC panel. The outgoing power circuits of this Power DB is equiped with MCB (6A) and RCCB (300mA). Today I noticed that the MCB tripped in the circuit which feeding to PLC control supply mentioned above. Please clarify why...

Hi, Is there any standard stating that we need to use Fire resistant cable on Hazardous classified area (Zone 21 and Zone 22)? Thanks.

Hi, Please help me on how can I use common Field E-Stop button for multiple motors? There are around 9 motors in the package which needs to be wired to one EStop at field. In Motor control center panel, all these 9 motors has individual DOL Starter circuits as attached. But now I would like to...

Hi, Please help me to understand on how to wire emergency diesel generator to Switchgear so that when there's a power failure, Generator can start automatically. I am clear about power cabling. I'm confused about the control cable wiring. I need to sense the voltage loss in Switchgear so that...

Hi, We have a 230V motor space heater power cable and a shielded thermistor cable to enter into motor terminal box in one cable entry. Please provide your thoughts and recommendations. Thanks

Hi, We have a 55kW motor with VFD drive. In the VFD drive we had considered PTC Thermistor protection provision. So we have pulled 1Pair cable to the motor. But in the motor we have found PT100 RTD. So There are 3 pairs at the terminal box. Now we have a problem. How can I over come this problem?

Hi, How can I monitor the over current value of the motor in PLC SCADA? The motor is running with DOL starter.

Hi, We are pulling the cable to control room from outdoor through wall opening as shown in the snap below. When raining, there is a water seepage into control room where there are sensitive equipment and monitor. we are still halfway through in engineering. So I don't want to seal the wall...

Hi All, I want to know if there is any way to autogenerate the typical rows based on the input I give in Column A. Please help me with your tips.