Electricity Forum Intelligent Power Today Magazine Arc Flash Clothing
Electricity Today T&D Magazine
Archives

HV Test Equipment

FERC Complaint Targets Duke, PJM Transmission Planning

A coalition of large energy consumers and ratepayer advocates has filed a complaint with the Federal Energy Regulatory Commission (FERC), urging the agency to prohibit transmission owners from independently planning "local" transmission projects exceeding 100 kilovolts (kV). The coalition argues...
Substation Testing

Vacuum Interrupter Testing for Circuit Breakers

How to predict field life using vacuum interrupters BY FINLEY LEDBETTER, Group CBS Utilities have widely replaced older air-magnetic and oil interrupters for circuit breakers rated at one kilovolt (kV) or higher with vacuum interrupters (VI) due to higher interrupt capability. Vacuum interrupters...
Breaker Testing

Partial Discharge & Circuit Breaker Asset Management

Detecting and avoiding preventable failures BY JAY GARNETT, Doble Engineering Company While metal clad switchgear can be very reliable, sometimes operating for over 50 years, throughout the aging process, this group of electrical disconnect switches, fuses and circuit breakers can experience...

Zensol new instrument for OLTC testing

According to CIGRE A2.34, the dynamic resistance measurement or DRM (OFFLINE) is a test that offers diagnostics for several diverter or selector switch malfunctions such as: contact problems, broken springs, broken transition resistors, poor contact pressure, inadequate transition time, momentary...
Home HV Testing

HV Testing

Dynamic Resistance Measurement

Condition testing of circuit breaker’s arcing contacts

BY BUDO MILOVIC, DV-Power

The preventive maintenance on a high-voltage (HV) breaker consists of several routine tests. The timing and motion tests are methods used to assess the breaker’s mechanical condition. When the timing and motion results indicate an abnormality, the dynamic resistance measurement (DRM) test can be an effective way to further diagnose the internal condition of the breaker contacts. As an example, a high-voltage puffer-type sulfur...

HV Test Equipment Articles

T&D Buyer’s Guide Companies

HV Testing Videos

ULTRAChecker for Operator Driven Reliability

SDT340 Ultrasound Data Collector

Bearing Toolbox for Advanced Bearing Failure Analysis

HV Testing Products

AEMC 1045 Handheld Insulation Resistance Tester

TB44 Series

AEMC 5050 5kV Megohmmeter

HV Testing Shared Media

Catalog

High Voltage, Inc. Product Catalog

Catalog

Electrical Equipment Testing & Maintenance Vol. 6

Catalog

Very Low Frequency Ac Hipot Test Sets - Vlf Series&E-Series Product Catalog