1. Cathodic protection is implemented to protect steel structure, Oil & gas pipeline and storage tanks from corrosion. To evaluate cathodic Protection of a system periodic "ON/OFF potential survey" is required. A cathodic protection System may have one or several T.R unit (Transformer Rectifier). Each Transformer Rectifier needs one current Interrupter for this survey. Verbal introduction:

2. Introduction: The global positioning system (GPS) has a lot of applications in many fields. Aerospace. Defense. Healthcare. Geographic survey. Transportation. etc. C.P current interrupter are using Quartz crystal technology alone and quartz crystal along with GPS technology.

3. Verbal comments: With GPS for accurate ON/OFF potential survey. when the C.P. system is complex with several T.R units then synchronized current interruption of all T.R units are required to collect useful data for evaluation. First Quartz Crystal technology and now GPS technology have opened new doors in C.P data survey and analysis.

4. Current Interrupter Electronic Timer Current Interrupter Quartz Crystal Controlled Current Interrupter GPS Synchronized Current Interrupter Low Accuracy not suitable for synchronized operation. Fairly accurate with time drift max. 0.5 sec in 24 hours. Master interrupter unit required for synchronizing all slave interrupters in each session of ON/OFF Potential survey. Max deviation of 1 millisecond with satellites in view. Once configured no activity of synchronization is required.

5. Quartz Crystal Controlled Current Interrupter Features: 40amp & 100amp Current Interrupter Models. Synchronized Quartz Crystal Controlled. Portable heavy duty casing with sealed construction. Synchronization better then 1millisecond. Rechargeable battery. Programmable keypad & reset time clock setting. Solid state construction Can be Electronically Synchronized.

6. GPS Synchronized Current Interrupter Features: 40amp & 100amp. Current Interrupter. Highly reliable & easy to operates. Precision clock timing even with Intermittent view of GPS satellite. Maximum deviation of 1 millisecond with satellite in view. Start cycle at beginning of work day. Close relay at end of work day. Start & stop date & time.

7. Summary: Integration of computerized data logging and analysis software resulted in making CP more accurate, opening new horizons for analysis. Hence saving time and money. GPS synchronized current interrupter is recommended for all size of C.P. system.