The JN3-12 series shunt magnetic lock indoor high-voltage grounding switch is suitable for 12kV and AC 50Hz power systems, and can be used in conjunction with various types of high-voltage switchgear. It can also be used as grounding protection during maintenance of high-voltage electrical equipment.
Product features: 1. Scientific, innovative, unique, and reasonable product design;
2. Advanced and reliable technical performance;
3. Adopting the principle of shunt magnetic lock, pressure is automatically generated when powered on to ensure good contact;
4. No need to touch the pressure spring, low operating force.
5. It can be used in conjunction with various types of high-voltage switchgear and can also serve as grounding protection for high-voltage electrical equipment maintenance.
Main technical parameters of JN3-12 shunt magnetic lock indoor AC high-voltage grounding switch
| Name |
Unit |
parameter |
| rated voltage |
KV |
twelve |
| Rated short-time withstand current |
KA |
16,20,25,31.5 |
| Rated short-time duration |
S |
four |
| Rated peak withstand current |
KA |
40,50,63,80 |
| Center distance between poles |
mm |
210,230,250,275 |
| Rated insulation level |
Power frequency withstand voltage (1min) |
KV |
To ground 42, between poles 75 |
| Lightning impulse withstand voltage (peak value) |
KV |
To ground 42, between poles 75 |
| Product model and specifications |
A |
B |
C |
D |
B |
C |
| JN3-12/20-210 |
two hundred and ten |
six hundred and four |
three hundred and one |
three hundred and sixty-three |
Figure 3 |
Figure 5 |
| JN3-12/20-230 |
two hundred and thirty |
six hundred and forty-four |
three hundred and one |
three hundred and sixty-three |
| JN3-12/20-250 |
two hundred and fifty |
six hundred and eighty-four |
three hundred and one |
three hundred and sixty-three |
| JN3-12/20-275 |
two hundred and seventy-five |
seven hundred and thirty-four |
three hundred and one |
three hundred and sixty-three |
| JN3-12/31.5(25)-210 |
two hundred and ten |
six hundred and four |
three hundred and five |
three hundred and seventy |
Figure 4 |
| JN3-12/31.5(25)-230 |
two hundred and thirty |
six hundred and forty-four |
three hundred and eight |
three hundred and seventy |
| JN3-12/31.5(25)-250 |
two hundred and fifty |
six hundred and eighty-four |
three hundred and eight |
three hundred and seventy |
| JN3-12/31.5(25)-275 |
two hundred and seventy-five |
seven hundred and thirty-four |
three hundred and eight |
three hundred and seventy |
JN3-12 shunt magnetic lock indoor AC high voltage grounding switch, external installation dimensions

JN3-12 shunt magnetic lock indoor AC high voltage grounding switch