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Hi, I need to make a field repair that entails digging up, cutting and re-flanging 2 inch sch 80 ASTM 106B (2000 psig hydraulic line) pipe. The pipes are close together and the limited access area makes welding difficult. The finished flange ends will have a masonry access box built around them...

Hi, I'm purchasing some sub-meters for main switch boards. Typical installation will monitor total three phase power used on 480/277 three phase wye branch circuits leaving the main switch board and feeding remote distribution boards. Can I do this with only ABC phase ct’s not monitor the...

Hi everyone, I hope you can clarify something for me. (I'm an automation guy, so I'm accustomed to controlling pumps, but know little about pump specs). I need to replace a defective booster pump. It is one of three over-sized 25 hp pumps (on VFD control) and expensive and time consuming to...

Hi, In industrial process control we have ISA-95 as an acceptable standard for automation to enterprise system integration. What would be the equivalent standard to apply to integrating the existing building systems data (hvac, fire, security, etc) into an enterprise system of a large hotel...

Hi, I am at a large convention center that has forty 4000 amp 480/277 main switch boards. Each main switch board is feed from an independent utility owned 12kv to 480/277 transformer. The transformer has no lightning protection on the secondary side. The main switch board has a N-G main...

Hi Everyone, I need to add a 30 kva indoor transformer inside an existing indoor air conditioned electrical room. The originally installed existing transformers sit on 2 inch raised concrete pads. The electric room is dry, has a concrete floor and the transformer I am installing has 2 inch...

Hi Guys, Can someone help me figure out which of the below pins I need to connect. I am using modbus RTU on a 2 wire RS485 link, and I want to connect the (master)PLC's rs232 to the (slave)VFD's RJ45. Thanks, Andy -------------------- Automation Direct Direct06 D0-06AR PLC RS232 port Port...

Hi Guys, I have a low tech question. I need to install some panic buttons in remote toll booths to tide me over a few months until a real security system can be installed. I have had the phone group install a phone jack and a house phone extension in each toll booth. Each phone line is...

Hi Guys, I have two questions I'm hoping you can help me out with. Question: 1) Is there any technical reasoning to use a sensorless vector drive on a water pump application that would justify the extra (10% ?) cost? background of question 1: I replaced a Square D omegapak installed in 1995...

Hi, I would like to turn off a group of dry type 480-208/120 transformers a few times a month to save on the power bill. A concern that keeps getting raised is moisture in the windings. These transformers are in an air conditioned control room so the humidity can be indirectly controlled...

I have a technical question. I'm hoping you can help me out. At the local convention center they have seventy-five 300 kva GE K Factor transformers for temporary show power. Each transformer is protected by a GE 500 amp SGLA36AT0600 current limiting circuit breaker. These transformers have...

Hi Everyone, I am looking for a low cost 36 channel stand alone datalogger that will monitor 24 volt solenoids for one week. One minute sample rate per channel is all I need. I do not even need the voltage quantified. Just on or off. Power is available at the test sites so it does not need to...

Anyone know what the normal temperature rise of a fully loaded breaker terminal should be? I understand that the connection is (in most cases) rated to work safely up to 75 Degrees C. I need to infrared scan hundreds of misc lighting and power panels mostly consisting of 20 amp branch circuits...

Hi guys, I have tested fifty 75 kva (480 to 208/120) transformers at the facility I work out for the amount of current returning to the transformer via the grounding electrode conductor. 39 of the transformers had no current on the GEC. 4 transformers had between 0.2 and 0.5 amps on the GEC...

Hi Everyone, I use a three-phase power quality meter to check for power problems in commercial facilities. Many times to measure the current on larger switch boards is impossible with clamp on current transformers and is even sometimes impossible with the flex CTs, because of the many parallel...

Hi Everybody, The facility I am at (large convention center) has dozens of 480 volt 125 kva 3 phase power transformers to supply power to exhibitors. Even with no shows the unloaded transformers are energized costing about $800/ day in energy costs. The heat then must be removed by HVAC costing...

I am going to buy a new camera for checking electrical panel. From what I have seen I like the FLIR E4. It's about $20k once you add software. Anyone know of a better camera for this application in this price range. I have been using a "Snapshot" but I do not care for it. Anyone have...

Hi Guys, I’m starting an electrical power distribution infrared survey on a huge (4 million sq ft) convention center. I have to set priorities to get the most out of the time and budget allowed. I am thinking of this order. Please let me know if your experience would lead you to a different...

I am to writing a floating point number for PID “reset time” from a SCADA HMI to a data block register in a S7-400 processor simatic PLC. Contrary to some published data I cannot get the PID block to read milliseconds. The PID block seems to insist that the reset and rate times be in siemens’...

We have three 1000 hp pumps (4160 volt each with it’s own VFD) to control the clear well level of a water discharge station. There is one PID level controller giving an output to the three pumps. The third pump is seldom used and the first two pumps have to run at 100% for ten minutes before the...