A few external gauges could prevent arc flash injuries

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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