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Recently Published Blogs

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.


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.


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.


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.  


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;


Doble M5400 SFRA Analyses Common Problems in Transformers

by Protec Tech Team January 15, 2018

Doble M5400 Sweep Frequency Response AnalyzerFrequency response analysis (FRA or SFRA) is utilized to test the mechanical integrity of transformer cores, windings, and press frames, in power transformers.


Rent the Doble TDR9000, TDR9100 to Assess Circuit Breaker Capability

by Protec Tech Team December 07, 2017

Doble circuit breaker testing systems are perfectly suited for simplified field testing. And, with the ability to resist electrostatic or magnetic interference during testing while at the same time allowing for self-diagnostic tests, these test sets ensure accuracy of results.


Doble M4000 M4100 is a Trusted Power Factor, Tan-Delta Analyzer

by Protec Tech Team November 20, 2017

The Doble M4000 M4100 Power Factor Insulation Analyzer sets the standard for power apparatus and insulation testing.  

With its unique combination of test capabilities and artificial intelligence analysis software the M4000 M4100  is known in the industry as a highly trusted Power Factor/Tan-Delta instrument.

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Rent the Doble F6150sv When Testing Complicated Relaying Schemes

by Protec Tech Team August 30, 2017

The effective and efficient operation of a power grid is largely dependent on the relay scheme. The importance of this critical electrical component makes it essential to regularly test its health status using high-grade electrical test equipment.


Test IEC 61850-Based Protection Devices, Schemes With Doble F6150sv

by Protec Tech Team July 10, 2017

Time sensitive information such as protection tripping commands are a high priority and require a quick means of communication. In IEC 61850 environments, the GOOSEs (Generic Object Oriented Substation Events) are the mechanism for delivering status information. Published as multicast messages without being addressed to a specific receiver, this information is then distributed across the network allowing any IED or test set to retrieve it.


Protec Offers Power Factor Test Sets from Doble, Megger and Omicron

by Protec Tech Team June 29, 2016

Power factor tests compare the capacitive current to the resistive current used by a piece of equipment.  If the capacitive current becomes large in relation to the resistive current, it indicates a potential problem with the insulation.  Insulation breakdown often leads to equipment breakdown.

Protec Equipment Resources offers many power factor test sets for rent. These units apply voltage to the conductors while measuring losses to ground. By comparing the results to historical results, abnormal conditions can be easily identified. Further tests can help determine exactly where the problem exists.  
While power factor testing usually involves transformers and breakers, tests can be useful on other types of equipment such as switches, motors and voltage regulators. 


Rent Electrical Test and Measurement Equipment from Protec Today

by Protec Tech Team June 08, 2016

Each Protec office maintains a full complement of electrical test and measurement equipment. Offering equipment from all of the premiere manufacturers for rent, lease or purchase, Protec has the electrical testing equipment you need to get the job done.

Whether you're in the market for a Micro-Ohmmeter like the AEMC 6250 10A Micro-Ohmmeter, offering output up to 10 Amps, this test set is uniquely designed to conduct tests on both resistive and inductive material, with operator selection directly from the front panel.


Protec Equipment Resources Inc.
National Headquarters
1517 West Carrier Pkwy
Suite 116
Grand Prairie, Texas 75050

Phone: 972.352.5550
Fax: 972.352.5553

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