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Protection and Cordination |
Problem An automotive plant needs to increase production capacity on an existing assembly line but wants greater reliability and reduced "downtime" to support the investment. Solution OPTIM Trip Units support zone interlocking. The plant engineer is able to extend this protection throughout the assembly line to provide better isolation and greater reliability. Also, with built-in communications and alarm capability, the whole system can be monitored to provide the plant engineering staff with critical data to reduce "downtime." Problem A manufacturing facility built in 1990 is required to replace several process lines with a more advanced automated manu-facturing line. The new protection requirements are quite different from the old protection settings, and now, the original 600 ampere circuit breaker does not coordinate well with the distribution system. Solution OPTIM Trip Units are programmable and provide virtual infinite settings. Setting increments are increased by a factor of ten as compared to conventional front adjustable trip units. As your distribution system changes, you simply reprogram (reshape) the trip curve, to guarantee selectivity. Problem A major university has always used fusible switches for their power distribution systems, but would like to utilize molded case circuit breakers on their next project due to the advantages circuit breakers provide. The problem lies with coordinating the switchboard's feeder breakers with this upstream fuse. Solution OPTIM Trip Units support an I4t long delay versus the traditional I2t for allowing close coordination with fuses. Now customers can mix circuit breakers and fuses while assuring selectivity. |
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Protection and Cordination |
Problem A manufacturing facility continues to set new peak kWh demand levels with the utility. New machinery, increased production on several manufacturing lines, and increases in HVAC usage, are thought to be the reason. The main switchboard already has a meter to monitor and measure kWh, but this will not alert the custom-er when the system is approaching the peak demand threshold or "break out" those areas responsible for the increases. Solution OPTIM 1050 Trip Units monitor and measure power and energy. Specific loads (production lines, machinery, HVAC, etc.) can now provide power and energy information. This unique feature allows a customer to analyze and allocate actual energy usage on a department or production line basis rather than as percentage of the total energy bill. Also, energy alarming allows the customer to receive an alarm whenever a preset kWh level is reached, allowing the customer to shed some noncritical loads or adjust their energy usage so that peak kWh is not exceeded. |
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Power Quality |
Problem A consultant is upgrading a waste water treatment facility where several variable frequency drives are being added to the existing distribution system. This site has experienced harmonic problems in the past. Knowing that the variable frequency drives may create harmonics on the system, the consultant would like the ability to monitor their harmonics, in the event preventative measures are needed. Solution OPTIM 1050 Trip Units monitor and measure harmonics. THD alarming will detect a change in power quality and alert the customer. Their sensitivity, up to the 27th harmonic, will identify the harmonic content and help the customer solve even the most demanding applications where power quality is an issue. |
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