Triple Frequency Generator Device, in the power industry, is often referred to as the Triple Frequency Induced Withstand Voltage Test Device.



The Triple Frequency Generator Device is a key piece of equipment specifically used for induced withstand voltage testing of iron-core electrical equipment such as transformers and voltage transformers (PTs). Since directly applying twice the rated voltage to a transformer at power frequency (50Hz) would cause core flux saturation and a surge in excitation current, potentially burning the equipment, it is necessary to increase the power frequency (typically to 150Hz, i.e., triple frequency) to keep the flux density within permissible limits. This allows high voltage to be applied without saturation, testing the inter-turn, inter-layer, and inter-section insulation strength of the equipment. Combining technological developments and industry standards for 2025-2026, here is a detailed guide to this device: 1. Core Working Principle Frequency Conversion Principle: Utilizes power electronics technology (IGBT inverter) to convert the input 50Hz power frequency supply into a 150Hz (or adjustable 100Hz-200Hz) three-phase or single-phase power supply. Flux Formula Derivation: According to the formula