16
- Contact form: point contact, line contact, face contact.
- Contact surface condition: When the contact surface forms an
oxide film (except for silver), the oxide film is much larger than the
metal itself.
- Contact pressure.
- the roughness of the contact surface.
Appendix II: Circuit Breaker Conductive Loop
Resistance Standard Reference Value
Model
Loop
resistance per
phase
（
μΩ
）
Model
Loop
resistance per
phase
（
μΩ
）
SN1-10
<95
DW1-60G
200
SN2-10G
75
SW1-110
700
SN4-10
50—60
SW2-110I
180
SN4-20
50—60
SW3-110
160
SN4-10G
20
SW4-110
300
SN4-20G
20
SW6-110
180—220
SN5-10
100
SW2-220
400
SN6-10
80
SW4-220
600
SN10-35
<75
SW6-220
<400
DW1-35
550
SW7-220
<190
DW1-60
500
KW1-220
400
DW3-110
1100—1300
KW2-220
170
