Nkọwa Dị Mkpirikpi:

Ihe mgbawa sekit M4 nke e ji usoro M4 kpụọ, sekit ya dabara adaba nke AC 50/60Hz, voltaji mkpuchi 690 V (M4-125 500V), voltaji ọrụ AC 690V ma ọ bụ karịa, nke a na-enye ọkwa ugbu a 12.5-1600A, maka ike nkesa nke sekit eletriki na nke na-adịghị emekarị na nke na-agbaji n'ọnọdụ nkịtị. A na-enye ndị na-agbaji sekit ọrụ nke nchebe megide oke ibu na sekit dị mkpụmkpụ na voltaji na-adịghị ike. Ihe mgbawa sekit na-agbaso ọkọlọtọ nke IEC60947-2. Ihe mgbawa sekit na-ekpuchi okpukpu abụọ (Na m=250A ma ọ bụ karịa), a na-ekewa sekit njikwa nke ngwa mgbakwunye na sekit bụ isi, ọ dịghịkwa mkpa imepe mkpuchi nke ihe mgbawa sekit mgbe etinyere ngwa mgbakwunye ahụ.