Recently Published Blogs

JUne, 2012When ground fault or microprocessor relay testing is needed, there’s no better relay test set than the Doble F6150 Relay Testing System.  This high tech solution to diagnostic simulation testing offers all the powerful flexibility that is vital to protective testing and keeps electrical equipment running optimally.

 

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Transformers can sometimes experience significant physical stresses whenever they are moved from one location to another, such as when they are initially shipped from the manufacturer. Once they have been placed into service transformers can also experience tremendous stresses related to being in the path of fault currents when something goes wrong in the electrical system. The combination of mechanical and electrical stress can cause the transformer to prematurely fail. Symptoms may not be obvious until the damage is already extensive. Performing sweep frequency response tests can be used as an early identifier problems that occur as a result of physical changes within the transformer.

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The Doble F6150e Relay Testing System is a versatile, all-in-one solution for testing protection relays and their protection schemes. Whether you need to test an individual component or test an entire scheme, the Doble F6150e Relay Testing System is the proven solution to assess protection system performance for analog testing of 1A and 5A protection devices. The Doble F6150e Relay Testing System has optional enhanced power output and WiFi features that allow further capability to give expanded performance and communication features.

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Transformers will sometimes experience a lot of stresses related to the transformer being moved from one location to another, or when they experience the excessively high currents related to through fault conditions.

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relay test set is generally heavy and large because it needs to produce large currents to be able to simulate the operating conditions of relays. It would be easier to test relays if you could move around without carrying the whole test system.

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Leakage Reactance testing is highly sensitive to transformer winding deformation.  When these type changes occur, electrical losses increase and make the transformer less efficient. Additionally, these type indications, as reflected in the impedance of a transformer, can be used as a diagnostic tool to help maintain the health of the transformer and ensure its continued service.

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Electrical test equipment rental is very common these days. There are many companies that give you different kinds of testing devices at reasonable rates. Devices like oscilloscopes, network analyzers, function generators, spectrum analyzers, logic analyzers, and telecommunication test equipment are readily available for rental or lease. But the problem is, which one should you rent? For this, you need to analyze your needs and understand your requirements. Two major companies in the electrical testing industry are Megger and Doble.

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Prevent the hassles of poor insulation with regular maintenance. Power factor testing is one of the common diagnostic methods used to evaluate the health of electrical insulation and to trend the degradation of that insulation over time.  Proper analysis of the data that is obtained in this type of testing is indicative of electrical losses within insulating materials and can be used to plan and prioritization of maintenance, repairs and replacement of electrical assets prior to failure.

For a reliable AC insulation analysis, rent the Doble M4000 M4100 Power Factor Insulation Analyzer from Protec today.

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Full simulation tests can be run on protection schemes and relays very efficiently with the help of a Doble F6150 Relay Testing System.It comes with high power, sophisticated software, and great flexibility that allow for the testing of all sorts of protection schemes.  The capabilities of theDoble F6150 range from testing relays ranging from relatively simple electro-mechanical relays to the more modern and complex microprocessor based relays. The Doble F6150 Relay Testing System is a complete solution for any problem related to protection relays and schemes, requiring no additional instruments.

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Finding the right diagnostic test to maintain and protect electrical equipment means using the best manufacturer’s equipment to get the right product for the job. When it comes to the power factor test, two makers stand out with reliable and accurate equipment that users can count on to perform optimally every time.

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Capacitance and Dissipation Factor (C&DF) test equipment can sometimes be limited by their power supply when testing highly capacitive objects.  An example of power system apparatus that might fall into this category would include large motors, generators or  cabling.  Test specimens that have a characteristically higher capacitance value will sometimes achieve a maximum output current from the test equipment at less than the desired test voltage.  By appropriately positioning a resonating inductor that is adjusted to resonate with the capacitance of the test object, the range of charging current from the test equipment can effectively be extended to accommodate testing of more capacitive test objects.

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Protective Relays could be characterized as circuit managers with varying degrees of supervisory and control capabilities depending on the complexity and criticality of the circuit.  They are designed to recognize abnormal or fault conditions, and to isolate the affected portion or the electrical system.  Not only does this allow the unfaulted portion of the electrical system to continue to function normally, but it diminishes the impact of the faulted portion of the system.  Changes to power system circuits and the coordination of protective devices can change due to age, loading, environmental impacts, new construction, etc. It is therefore critical that these devices function properly and are appropriately coordinated when they are called into action.

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