Megger Vidar Vacuum Interrupter Tester

When a vacuum circuit breaker is commissioned or undergoes routine tests, it is very important to be able to ascertain whether or not the Vacuum Interrupter (VI) is intact before putting it back into operation. The VI in vacuum breakers do not last forever. Leakage starts after years or decades and the interrupters fill with air making the breaker unreliable. In most cases, the leakage process is rapid once it has started. In addition to leakage, dirt on the poles and on the exterior surface of the interrupter can make it unsafe during operation. The mechanics of the breaker can become misaligned so that the distance between the poles no longer is adequate. The Megger VIDAR (introduced in 1985 as the Programma Vidar), uses high voltage DC to test the integrity of vacuum breakers. The Megger VIDAR enables you to check the integrity of the vacuum interrupter quickly and conveniently by means of the known relationship between the flashover voltage and the vacuum interrupter. A suitable test voltage (DC) is applied to the breaker, and the result is known immediately. The VIDAR permits you to select among test voltages from 10 to 60 kV DC. One of these voltages is customised and specified by the customer when ordering A green lamp indicates approval of the VI. A red lamp indicates that it is defective. Two-hand control and a high-voltage warning lamp enhances safety. FEATURES Tests the integrity of vacuum interrupters quickly, safely and easily. User defined voltage selection. Extensive voltage range. Easy to operate. Follows ANSI/IEEE standardized DC test methods. Lightweight and portable. Megger Vidar Product Video Megger Vidar Specifications Environment Application field For use in medium and high-voltage substations and industrial environments. Operating temperature -10°C to +50°C (14°F to +122°F). Storage -40°C to +70°C (-40°F to +158°F). Humidity 5% - 95% RH, non-condensing. CE-Marking LVD 2006/95/EC. EMC 2004/108/EC. General Specifications Mains voltage 115/230 V AC (switchable), 50/60 Hz. Power consumption 69 VA (max). Green lamp Indicates an approved breaking chamber. Red lamp Indicates a defect breaking chamber, lights up if the current exceeds 0.3 mA. Yellow lamp Indicate that the test was interrupted. Standard voltages, switchable 10, 14, 25, 40 and 60 kV DC. Accuracy 0 to -15%. Customised voltage Between 10 and 60 kV DC. Determined at the factory. Default voltage is 50 kV. Ripple Max 3%. Dimensions Instrument: 250 x 210 x 125 mm (9.8” x 8.3” x 4.9”) Transport case: 460 x 430 x 210 mm (18.0” x 17” x 8.3”). Weight 6.9 kg (15.5 lbs) 10.7 kg (23.6 lbs) with accessories and transport case. Megger Vidar warranty One year.

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