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Rent the HV Diagnostics PD60-2 Partial Discharge Measurement System

by Protec Tech Team June 18, 2018

The PD60-2 is a portable two-piece partial discharge (PD) measurement and location system that interfaces to the following HV Diagnostics Test systems:

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Does AC and DC Hipot Tests Cause Damage?

by Protec Tech Team June 18, 2018

Hipot testing is primarily performed to make sure that high voltage insulation will hold up during service. Many equipment and plant owners share concerns regarding the possibility for causing damage or premature deterioration of insulation by performing hipot testing on their assets.

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Fully Analyze Circuit Breakers with the Vanguard CT-8000 S3

by Protec Tech Team June 05, 2018

The Vanguard CT-8000 S3 Digital Circuit Breaker Analyzer can fully analyze a circuit breaker's performance by measuring the main contact and resistor contact time, stroke, velocity, over-travel, bounce back and contact wipes.

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The Vanguard CT-8000 S3 can perform dynamic-resistance tests using a 200-ampere, built-in, DC power supply. One channel is available for performing a dynamic contact resistance test. The resistance measuring range is from 1 micro-ohm to 1,999 micro-ohms.

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Rent the Megger MWA330A 3-Phase TTR, Winding Resistance Analyzer

by Protec Tech Team June 05, 2018

The Megger MWA330A 3-Phase Transformer Turns Ratio and Winding Resistance Analyzer is an advanced 3-phase transformer test system that provides complete ratio, phase and winding resistance measurements with only one 3-phase lead-set connection.

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Once connected, the Megger MWA330A performs DC resistance measurements on all high- and low-side windings without reconnection. It has an 8-terminal/6-winding resistance measurement capability and doesn’t need any inter-connected boxes, allowing for testing on all 6 windings without having to disconnect and reconnect leads.

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Selecting the Best Megger Time Domain Reflectometer that Meets Your Needs

by Protec Tech Team May 29, 2018

Time domain reflectometers are tools that can help make cable troubleshooting faster and easier. Instead of spending time and effort finding faults manually, these devices can localize the fault within seconds. These testers are especially valuable on cable installations that are several miles long. They are not only suitable for cable fault location in electrical systems but also in telecommunications, television and computer network facilities.

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The Basics of Dielectric Absorption Test

by Protec Tech Team May 29, 2018

The dielectric absorption ratio is the ratio of two time-resistance readings such as a 60-second reading divided by a 30-second reading.  If the ratio is a 10-minute reading divided by a 1-minute reading, the value is called the polarization index. The principle behind the test is that the resistance would increase with time as the capacitive and polarizing currents begin to subside.

Unlike spot tests that are relative to specific conditions such as temperature each time that the test is performed, ratios of insulation resistance (Dielectric Absorption Ratio) that are taken at essentially the same time and temperature require no correction factor for comparison purposes.

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What is a Secondary Injection Test Kit

by Protec Tech Team May 21, 2018

The protective devices that are used for the oversight and operational decision making in low voltage circuit breakers (LVCBs) are are often simply referred to as a Solid-State Trip device (SST).  They are essentially protective relays that are frequently an integrated part of a low voltage circuit breaker and monitor the primary current path of the circuit breaker.  In normal operation, these solid-state trip devices will sense changes in the primary current path and make the decision to open the circuit based on the magnitude and duration of the fluctuation. 

 

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Rent the Megger SG32-1500M Power Cable Fault Locator from Protec

by Protec Tech Team May 21, 2018

The Megger SG32-1500M Power Cable Fault Locator is a portable cable fault location and high voltage test system designed to provide quick, effective, accurate and safe fault location, thereby reducing system outages and time lost.

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The Megger SG32-1500M is housed in a rugged yet portable enclosure, which makes it suitable for use in and outdoor conditions.

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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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Questions About VLF Hipot Tests

by Protec Tech Team May 15, 2018

We find there are often plenty of questions from readers about the differences between VLF, AC and DC hipot testing methods. And of course, plenty of arguments surround whether DC testing should be performed or completely replaced by VLF testing. 

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When Testing Differential Protection Relays Trust the Omicron CMC 356

by Protec Tech Team May 07, 2018

Relays take abuse during normal operation, so it is important to always check their condition. Regular checkups will negate problems before they worsen, or even start.

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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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