MCG'S UNIQUE FEATURE: MULTIPLE (INDIVIDUALLY-FUSED) PROTECTION PATHS ON EVERY PHASE
A SINGLE LIGHTNING STROKE CAN BE COMPOSED OF 2 TO 20 IMPULSES.
MULTIPLE PROTECTION PATHS ON EACH PHASE IS THE DISTINGUISHING FEATURE  OF WORLD-CLASS SURGE PROTECTION.  THIS IS YOUR "EMERGENCY BACKUP."  IF ONE LIGHTNING IMPULSE DESTROYS ONE OF THE PATHS, YOUR EQUIPMENT CONTINUES TO BE PROTECTED BY THE REMAINING PATHS.  AT THE FACILITY OR BUILDING MAIN DISTRIBUTION PANEL, ALWAYS DEMAND SPDs THAT USE MULTIPLE PROTECTION PATHS ON EVERY PHASE.	IN EVERY CHINESE PROVINCE THERE ARE MANY MANY EXAMPLES OF SURGE PROTECTION FAILURES.  THESE FAILURES ALWAYS COME FROM SPDs DESIGNED WITH ONLY ONE PROTECTION PATH PER PHASE.  NO BACKUP.  SO WHEN ONE IMPULSE DESTROYS THE SINGLE PROTECTION PATH, YOUR EQUIPMENT IS LEFT WITH NO DEFENSE AGAINST THE REMAINING 10-20 IMPULSES.

	电涌防护器的通常设计：  每相只有一条保护通路 设计缺陷：雷击时不 能给设备提供100％的保护 。
1	Φ    中性线  Neutral	每相一条入地保护通路   雷击击穿这条保护通路，设备就失去了保护。
2	Φ    中性线  Neutral	后续的电涌必然损坏电子设备
	MCG多条入地保护通路确保电子设   备的安全。下面为每相的3个示意图
1	相 中性线	<<---设备 工作正常  每相有5条独立的带 熔断器的入地保护通路	1) MCG 多条如地保护通路--SF202XT 每相5条。
2	相4  中性线	<<---设备 工作正常 雷击击穿其中的 一条通路，	2) 雷击击穿一条保护通路
3	相  中性线	<<---设备 工作正常 余下的通路仍给设备 保护	3) 条保护通路继续保护设备，设备的安全绝对有保障。
单通路的SPD在多闪的雷击中失效，而MCG 将继续保护设备。
	熔断器 保护模块