To display voltage values on a panel voltmeter of a high voltage power line (69kv) what additional electrical equipment should be added?

To display voltage values from a high voltage power line (69 kV) on a panel voltmeter, a step-down transformer (also known as a potential transformer or PT) should be added to reduce the high voltage to a lower, manageable level suitable for the voltmeter. Additionally, appropriate protection devices, such as fuses or circuit breakers, should be included to ensure safety and prevent damage to the equipment. Proper insulation and grounding are also essential to safeguard against electrical hazards.