By Paul Dvorak CG Power showed this gauge enclosure at the recent AWEA Windpower 2017 conference. The red numbers in the photo refer to a: 1 Liquid level gauge with optional contacts. 2. Pressure or vacuum gauge 3. Polycarbonate visible break-window for MV switch contacts 4. Temperature gauge with optional contacts 5. Lockable MV switch. 6. Terminal strip for customer connections. 7 Analog 4 to 20 mA output temperature sensor.
Arc flashes often occur when workers open high-voltage transformer cabinets to check the internal equipment. The potentially fatal discharge results from a low-impedance connection through the air to a ground or other voltage phase
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