N pole 北极
pulsation n pole 脉动极
wooden n pole line 木杆线路
gin n pole derrick 桅杆式起重机
n-fold pole n 阶极点
n-order pole n级极点
n-th order pole n级极点
Note:For CM1-160,225 four-poles breakers, the instantaneous release of N-pole (short-circuit protection) have no 5 In spec.
注：对CM1-160 、225四极断路器，其中性极（N ）的 瞬时 脱扣器（ 短路保护）均 无5In规格。
In fact, however, the N-pole side and the S-pole side are excited through the same field winding, which means that this model shows MMF that is only half the actual value.
事实上，N极边和s极边由相同的励磁绕组励磁，这意味着模型中的磁动势只是实际磁动势的一半。
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