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Scotty, The main CB will be on the main MCC and the cable from there to the new SB. I have looked up the schenider data sheet on the cascade steam the downstream CB suitable for the 50kA fault current fo the main CB is 36kA.

Collies, Are you saying we have two 630A 25kA circuit breakers one on the main MCC and one on the new switch board? Regards

Scotty, Update drawing attached..Typo for the 50kA.. Thankshttp://files.engineering.com/getfile.aspx?folder=743b18cc-65c0-40ff-b420-bf052eb49964&file=New_MCC_single_line_diagram-Model.pdf

Hello, Scotty attached is the link to my porposed sigle line diagram. Much Appreciated. Regards http://files.engineering.com/getfile.aspx?folder=7e70405c-fa3b-4691-b3eb-54f8afabdc2e&file=New_MCC_single_line_diagram-Model.pdf

Scotty, Yes it will be direct connection from the the busbar of the upstream through the 630A MCCB as per the sigle line diagram and use the 63A 3pole MCCB for all the aircon and the welding outlet loads. The switchboard will be wall mounted and is just about 3 meters from the main MCC so I...

Hello, I am in a situation where we are running out of the MCC switchboard spares for future works and so I am planning to rationilise so that I will have all the feeders relocated to a wall mounted switch board to make room available for drives only. The feeders are mainly for 2 air con units...

Thanks dV8r. Hello All, Can anyone tell me if there is a FBD in Proficy ME that can do selection between two analog inputs where the output is determined by a switch. For instance if I have IN1 and IN2 and and the S is the switch to select IN2. I have a situation where it is a PID loop that...

Can we do online changes to the variables on a FDB?

Thanks all. Just wondering what would be the best P, I, D tunning parameters for the temperature controller if doing the PID tuning for the first time? I have a UDFB for PID block in Proficy ME PLC and the guys who did the programming put the following parameters: Proportional gain= 2 Integral...

DV8r. Thanks for that. I have asked the operators to put that back into auto so that we can keep and eye on it to see if this occurs again.

Electricpete- Thanks for that link..

Thanks dV8r. I also have an issue with the PID controller for the control valve. We had an instance where the controller was in auto mode and controlling the fine and all of a sudden it jumped to 100% output. What would be a likely cause of this? I had a look at the trends and could not see an...

Jaref Yes I have search and found the one that suits my application. It ia an electronic time. part number DMB-01-C-M24. Once again thank you all for your porfessionalism. Regards

Thats jraef. Do I need to use two timers to have the stop/start continious operations? I guess similar to flip flop operation. Regards

Hello Is it ok to put a timer to stop and start 22kW? The boss whats a cheaper option and is wanting to put a timer in the current DOL cicuit to start and start the 22kW. He wants to run the motor for 15 mins and stop for 15mins continiously. My concern is with this affect the motor windings...

Hello Can someone please explain to me how the LEN (short for length) in the MOV FBD in Proficy ME pLC? I would like to move a variable to a memeory location and display that on the HMI. Thanks in advance

Hello, Is the Function Block in Proficiy ME PLC that can output and store only a high value? I have a themperature reading which I wanted to capture and display on HMI. The operators use a thermocouple attached to a ladle to measure the temperaure of the molten silicon. What i wanted to do is...

Thanka dV8r. I have also found out that you can identify the spare address from the variable tab and look up from there.

Thanks dV8r. How about us exporting a set of vairables as.csv and editing the variables before exporting back; how do we know what address to change to? Cheers

Hello, Can anyone tell me how can we determine the spare available adrressing in Proficy ME PLC? I looked up on the Variable tab and its not giving much clue.