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Recently Published Blogs

Using the Doble M5200 SFRA for Testing Transformers Without Untanking

by Protec Tech Team June 27, 2019

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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Physical changes to the inner workings of a transformer result in altered electrical characteristics. When abnormal conditions such as these occur, it is important to check for signs of physical change or deformation of transformer components. You can use a Sweep Frequency Response Analyzer  to verify that Physical changes have not occurred inside the transformer without having to remove it from its enclosure.

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Control your F2000 Series Relay Test Set with a Doble F2010 Minicontroller

by Protec Tech Team June 20, 2019

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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The M4110 Leakage Reactance Module from Doble Test Instruments

by Protec Tech Team April 19, 2019

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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Megger and Doble – The Best Electrical Test Equipment

by Protec Tech Team March 07, 2019

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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Rent the Doble M4000/M4100 for AC Analysis of Electrical Insulation

by Protec Tech Team February 20, 2019

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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Doble F6150, a Complete Solution for Problems Related to Protection Relays and Schemes

by Protec Tech Team February 06, 2019

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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Megger and Doble Power Factor Test Equipment

by Protec Tech Team January 02, 2019

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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Test High Capacitance Components with the Doble Type C Resonating Inductor

by Protec Tech Team October 03, 2018

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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Testing Relays Using the Doble F2253 Relay Test Set

by Protec Tech Team July 05, 2018

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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The F2000 Series Doble Relay Test Sets

by Protec Tech Team June 25, 2018

Relays are often utilized in electrical facilities as isolated switches or protective devices for various electrical equipment. Due to the mechanical operation of relays, the contacts are prone to contact degradation, so it is important to regularly test for the electromechanical, electronic and protection schemes to ensure safe and reliable operation, and to avoid a faulty relay system acting up during critical operations. To assess relays and protections schemes, consider investing in a relay test set or a power system simulator.

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Doble's Single Phase Relay Test Sets

by Protec Tech Team May 15, 2018

Relays play a critical role in the protection of electrical power systems. They are used to monitor and control the operation of power system components.  For example, if a protective relay were to senses a fault condition, it could tell a circuit breaker or some other protective device to open and thereby isolate the faulted portion of the circuit.  

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The Importance of Protective Relay Testing

by Protec Tech Team May 07, 2018

The Doble F6150e Relay Testing System offers the ability to perform in both;

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Protec Equipment Resources Inc.
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