Zero Elevation refers to mounting condition which?

• A. When the transformer is mounted below the bottom of the tank.
• B. When the transformer is mounted on the tank wall.
• C. When the transformer is mounted near the bottom of the tank.
• D. When the transformer is mounted above the bottom of the tank.

Answer: (B)

Zero elevation means using the tank wall as the reference plane for mounting the transformer, so the unit sits directly on or against the vertical wall rather than being placed at the bottom or higher up. This keeps the mounting at a fixed, neutral height relative to the tank’s side, avoiding the complications of sitting on the tank bottom (which could involve sediment, moisture, or clearance issues) or being raised above the bottom (which would introduce an offset). Mounting on the tank wall provides a stable, accessible position with a consistent reference level, which is why this option is the best fit for zero elevation.