The main equipment includes neutral point isolating switches, discharge gaps, zinc oxide arresters, and current transformers for measuring discharge current. To ensure an aesthetically pleasing and convenient layout of the equipment, based on the user's equipment selection, a separate T-shaped or door-shaped bracket can be manufactured for the user. The neutral point accessories such as neutral point isolating switches, discharge gaps, and arresters can be designed together, and the current transformer secondary overvoltage protector can form a set of voltage stabilizer neutral point accessory combination equipment that is conducive to on-site construction and installation.
Neutral grounding
It is different from protective grounding.
neutral point
It refers specifically to
transformer
At the low voltage end, in the Y connection method, there are three windings
connection point
The neutral point connected to the earth is called neutral grounding, with a grounding resistance not greater than 4 ohms. Protective grounding refers to the electrical equipment
shell
Connecting to the earth is called protective grounding, with a grounding resistance not exceeding 4 ohms.
■ Product usage
The SH-500 voltage regulator neutral point gap grounding maintenance and installation is specifically designed for the neutral points of 110KV, 220KV, 330KV, and 500KV power voltage regulators, allowing for two different operation modes: grounded operation or non-grounded operation of the regulator's neutral point. The rod gap employs an extremely uneven electric field, resulting in unstable discharge voltage with significant dispersion, thereby determining its poor maintenance performance. The rod gap, with an average electric field, has stable discharge voltage and low dispersion, offering good maintenance performance. The ball gap is relatively easy to debug on site, and users can perform on-site debugging according to their local conditions; however, the rod gap's pointed top is particularly difficult to align, making on-site debugging challenging. The ball gap is made of stainless steel with a silver plating, which is costly and requires high fixation standards. Therefore, many manufacturers opt for the rod gap to reduce costs, without considering the application effect.
