Power Quality Audit

1. Introduction: Now days LED lights are widely used by people to save electricity cost and at the same time it plays a vital role to make environment pollution free  as it does not contain any toxic element such as mercury. All the LED bulb does have driver in built. This basically takes AC power and converts it to DC using high frequency switching. 2. Common electrical causes of LED light/bulb burning: Over voltage Frequent voltage fluctuation   Effect of over voltage on LED light/bulb LED light/bulb is DC operated device but takes 230AC as input. It converts AC to...

Fig. 1: Localized breach in sheath of titanium sheathed process heater Fig. 2: Multiple physical and wire breaks in a titanium sheathed process heater 1. Introduction: Heater coils are mostly resistive element which consumes whole active power and dissipates the same as heat. It is the Jule effect ( H= I2 x R x t) which produces the heat. Overheating is the main root cause of such heater failure because every heater does have a certain power dissipation capability beyond that it can fail.  2. Common causes of heater coil burning: a. High voltage imbalance in the lines where heater...

  As I wrote in the previous two blogs on energy optimization in manufacturing, Data Center Energy optimization faces exactly the same set of challenges. How do we know concurrent usage of machine and energy? When a fan is running on a server, is that cooling really necessary? In DCIM (Data Center Infrastructure Management software), power data is available on each PDU (power distribution unit) which typically powers up a cluster of servers or switches. To do optimization of local fans or global HVAC air cooler, against the usage of the servers, concurrent time series data of fan load vs...

  A patient is receiving an important scan using some form of medical imaging equipment. Be it an MRI, CT, PET or some other highly sensitive imaging equipment, and the machine fails due to some unknown power issue. The expense needed to repair the machine combined with the patient still requiring vital information about their health is a heavy burden put on hospitals or equipment handlers.  One such case involves a mobile MRI System that is leased to hospitals. These systems require clean, high quality power in order to function properly. During a particular scan, a technician had noticed some...

While investing in energy efficiency brings tax deduction for manufacturers, so far approach has been straight forward. Replace DC drives/Gearbox to AC Vector Drives. Change to LED Lamps. In both the cases, energy efficiency is achieved against ominous increase of harmonics in the line, which kills the motor core faster ( For details, please see the case study where we have seen up to 35% wastage of energy eroding any gain in replacement : "How MachineSense Helps You Measure Harmonics in Electrical Lines" ) However, a much higher degree of energy optimization is possible from following solutions if the factory...