In electrical power systems, distribution transformer is an equipment which distributes power tornthe low-voltage users. For proper operation (i.e., under rated conditions) of the transformers,rntheir operational conditions should be monitored and maintained. Overloading and overheatingrnare two sources of transformers failure that cause power disruption for the customers and reducernthe life time of the equipments on the power distribution system. Since it is very costly to repairrnor replace a single transformer, it also has its impact on the economy of the country. Hence, arnsystem that properly monitors the power system and take corrective action should be in place.rnThis thesis presents the design and implementation of a Wideband Code Division MultiplernAccess (WCDMA) based distribution transformer monitoring system. This system monitors andrnrecords key parameters of a distribution transformer like load currents, load voltage, andrntransformer oil temperatures. These parameters provide useful information about the status of arntransformer. The acquired parameters are processed and the data is sent to a central monitoringrnstation through the WCDMA air interface. The data will then be further processed and analyzedrneach moment by the system operator. WCDMA has a very low latency which is best for real timernsystems. Besides that it provides a balance of trade-offs between cost, capacity, performance,rnand density.rnThe system is designed and implemented in a laboratory using Wi-Fi network and keyrnparameters were recorded. The variations of the recorded values help us in identifying thernpossible failure that could occur, if the values are over the rated values. Monitoring of therntransformer has been achieved in the laboratory through our system. Then, possibly correctivernactions, like balancing the loads on each phase or even switching the transformer off, can berntaken before the failures happen and we can identify the parts of the electric power distributionrnsystem which need stabilizing from the history we get. The latency of the WCDMA was alsorncalculated. The maximum time of arrival of the data at the central station was found to be lessrnthan 100ms. Thus, this implemented system will help the utility to improve fault restoration timernand optimally utilize distribution transformers for a longer period of time.rnKey words: WCDMA, distribution transformer, monitoringrnDesign and Development of WCDMA based DTMS iirnAcknowledgment