XRNM(WFNHO)系列高压熔断器采用插入式和母线式两种结构，具有安装体积小，接触可靠和更换方便的特点；撞击器并联于由纯银片制成的熔体，与经化学处理过的高纯度石英砂一起密封于熔管内；熔管采用耐高温的高强度氧化铝瓷制成，在线路发生故障时，熔体融化，在熔体出现电弧瞬间，撞击器的与熔体并联的高电阻金属丝立即熔断，撞击器迅速弹出，推动连锁电器触头，自动切换电路或发出熔断讯号。

WFNHO-10/150A  WFNHO-12/160A  WFNHO-10/25A   WFNHO-7.2/31.5A  WFNHO-10/40A   WFNHO-12/50A
WFNHO-3.6/63A  WFNHO-10/80A   WFNHO-10/100A  WFNHO-10/125A    WFNHO-10/150A  WFNHO-10/160A
WFNHO-10/200A  WFNHO-10/224   WFNHO-7.2/25A  WFNHO-7.2/31.5A  WFNHO-7.2/40A  WFNHO-10kv
WFNHO-10/63A   WFNHO-7.2/80A  WFNHO-10/100   WFNHO-7.2/125A   WFNHO-10/150A  WFNHO-7.2/160
WFNHO-7.2/200  WFNHO-3.6/50A  WFNHO-3.6/63A  WFNHO-3.6/80A    WFNHO-3.6/100A WFNHO-3.6/125A
WFNHO-3.6/160  WFNHO-12/224   WFNHO-6/250A   WFNHO-3.6/150A   WFNHO-12/160A  WFNHO-12/200A
WFNHO-12/315A  WFNHO-12/224   WFNHO-6/250A   WFNHO-6/315A     WFNHO-12/50A   WFNHO-12/63A
WFNHO-12/80A