Parallel vs. Series Connection for SPDs: Which Is Better?
Frequently Asked Questions
What is a parallel connection for SPDs?
In a parallel configuration, multiple SPDs are connected simultaneously to the power lines of the protected equipment, providing higher current capacity, lower grounding resistance, better surge distribution, and redundancy.
What is a series connection for SPDs?
In a series configuration, multiple SPDs are connected sequentially along the power lines, offering higher voltage withstand capability and cascaded protection where each SPD handles a portion of the surge energy.
When should I use a parallel SPD connection?
Parallel connections are commonly used in low-voltage power systems, communication systems, and for protecting voltage-sensitive electronics like computers and servers.
When should I use a series SPD connection?
Series connections are preferred for high-voltage transmission lines, high-voltage equipment like transformers and generators, and specialized scenarios requiring cascaded protection or extreme voltage resistance.
Which connection method is better for most applications?
Parallel connections generally suit most standard lightning protection needs, offering robust overall protection. Series configurations are reserved for specialized high-voltage applications.
Should I consult an expert when choosing SPD connection?
Yes, consulting professional electrical engineers or lightning protection experts is strongly recommended to ensure system reliability and safety.
