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Thanks guys, your replies have only made my initial reaction to this device stonger. I agree that there are many steps that could be taken to aleviate energy problems before relying of "black box" device. As mentioned load balancing can be done in house and generally you can adjust your...

Thanks mate. apologies for the extra post.

Guys found the problem. Apparently the electrician DID have the sensor backwards. Most embarrasing but it does happen.... Apologies to all.

Gents, Currently our Environmental manager is looking at installing a unit into our buildings called "Power perfector" for energy efficiency reasons. Apparently this unit will reduce harmonics, transients, improve power factor and phase voltage imbalances. Bascially it will reduce your energy...

Already checked that. Rookie mistake. Nope.

Gents, Little help please. Currently investgiating some intermittant faults on a server room distribution board. At the moment the UPS systems kick in and out randomly as a result of suspected voltage fluctuations. To check our supply we monitored the supply to the board with a power quality...

Thanks, Yeah I had a bit more of a fiddle around and figures out the addressing using existing cards. Thanks for your help though. Much appreciated.

Gents, I'm trying to add some hardware to a PLC 5 remote I/O adapter. It has been configure to read the racks as an Remote I/O scanner. I'm wondering wether I can just use the auto configure to pick up the new cards I add and the adresses for the inputs and outputs. Both cards are digitals...

At the moment we have a little bit of a problem on one of our machines. We have a shunt coil on the main power breaker on the machine which is tripping every time we reset the power to the machine. The coil is powered up from a contact on a 24V DC emergency stop relay. Currently we have...

Where was this dragline? The biggest dragline used to be Big Muskie but now that that is decomissioned the largest is now at Peak Downs mine which is where I just started working.

Marvelous gentlemen. Thanks The draglines are controlled by digital drives (one each for the genrators and the motor fields) but the control used is based on the Ward-Leonard system. The draglines are over 30 years old but obvioulsy the controls are somewhat updated using drives and PLC's...

Hi guys, Was wondering if anyone had any info about the Ward-Lenard system of controlling DC motors and generators. In particular using them in draglines. Have search endlessly on the net and have been unable to find anything valueable. Books, sites, anything. Any help would be appreciated...