Path To Achieve Lightning Protection Effectiveness Of Surge Arresters
In the protection system of power transmission lines and power distribution equipment, 11kv lightning arrester plays a core role as an overvoltage limiter. The effectiveness of its lightning protection measures depends not only on the product's parameters but also on a scientific management system that runs through the entire process from initial planning, on-site installation, to subsequent operation and maintenance.
Technical Logic of Selection and Location
The starting point for lightning protection upgrades lies in the differentiated analysis of the line corridor. Towers in different geographical environments exhibit significant differences in the probability and type of lightning strikes. Before installing the 15kv lightning arrester, it is necessary to combine operational experience and lightning location system data to identify vulnerable sections or towers with difficult-to-reduce grounding resistance as priority installation points. For specific systems, such as photovoltaic power stations or low-resistance grounding systems, the rated voltage (Ur) and current capacity of the lightning arrester in transformer must be strictly matched with the system operating conditions to avoid premature damage under operational overvoltage due to insufficient parameter margins. The pre-commissioning electrical tests, such as measuring the DC 1mA reference voltage and leakage current, are the final checkpoint for verifying equipment performance.
Installation Process and Grounding Coordination
The installation quality of the high voltage lightning arrester device directly affects the protection range and reliability. During installation, vertical force should be ensured, and a sufficient safety distance should be maintained to prevent high-voltage discharge to the surrounding area. For 33kv lightning arrester circuits with series gaps, the gap adjustment must be closely coordinated with the volt-second characteristics of the insulator string to ensure reliable operation during lightning strikes. Coordinated modification of the grounding system is equally important. Lightning arresters should have separate grounding wires laid along the towers and reliably connected to the tower grounding grid to reduce impulse grounding resistance and provide a smooth discharge path for lightning current.
