An instrument transformer is a piece of electrical equipment primarily used in power systems for the measurement, protection, and control of current or voltage.
Equipment Inspection: Check for external cracks (replacement required if cracks exceed 0.2 mm); verify insulation resistance >1000 MΩ (tested with a 2500 V megohmmeter).
Tool Preparation: Hydraulic crimping tool, phase meter, infrared thermal imager, megohmmeter, and other specialized tools.
Installation Location: Avoid strong electromagnetic fields (distance from transformers >5 m); ensure vertical installation with an inclination of ≤1°; reserve a heat dissipation clearance of ≥80 mm at the top of the distribution box.
Mounting Method: Secure to a metal framework or wall; ensure the base is properly grounded; align the centers of the three transformers on the same plane.