Librairie technique Megger

If a scanner is used to scan a battery bar code the battery string name will be saved in the data file. A bar code can be created with a string name.  This is then scanned into the BITE2 receiver, using the bar code reader. When the data is transferred to Power DB the string will display the bar code, during the download.

Batteries can present an arc hazard due to their exposed terminals (posts). If a non-insulated tool should fall across these terminals the resulting arc flash can injure people in the vicinity as well as damage equipment. This is why insulated tools should be used when working on battery strings. This is also why some batteries have caps covering their posts. These caps are removed during testing.

In 2007 FERC approved 83 NERC (North American Electric Reliability Council)   Reliability Standards, the first set of legally enforceable standards for the U.S. bulk power system. Compliance with approved NERC Reliability Standards is now mandatory and enforceable in the United States.

Ohmic measurements can be performed with AC or DC current. Which provides the most information about the battery? To answer this we first have to ask what the characteristics of a battery are.

This application note will cover why primary injection is specified per NFPA70/NEC standards, the basics of Ground Fault (GF) testing, and the challenges associated with testing Low Voltage (LV) circuit breakers using primary injection such as cable length, power sources, breaker configurations, and Current Transformer (CT) polarity.

SAFETY Reminder to all users of the EZ-THUMP V1 models

This procedure will guide you through updating the firmware in the BITE3 using the Power DB LITE software. It is recommended that you first download the latest firmware from the Megger web site.

Measuring the DC conductor resistance of a rotating machine stator can reveal a lot of information about the machine. It is always desirable to find out the existence of any resistance that is higher than the nameplate value which might be caused by poor joints, corrosion or mechanical deformation of the stator winding.

REQUIREMENTS FOR SAFE WORK ENVIRONMENT WHEN PERFORMING MV or LV POWER CABLE FAULT LOCATING BY DISCHARGING A HIGH VOLTAGE CAPACITOR.

Since the 1950’s vacuum has been used as insulation media in switchgears. Even though that technology has proven to be very reliable, over time air will leak into the vacuum chamber and degrade the insulation. Also, a good practice is to measure after transport or accidents. The accepted way to test the vacuum integrity has always been through a voltage withstand test. For field tests DC test is preferred due to the weight andsize of the instruments.