The JN15-24 indoor high-voltage
grounding switch features a simple and compact structure, as well as reliable technical performance. It complies with the requirements of GB1985-2004 "AC High-Voltage Disconnectors and Grounding Switches" and IEC62271-102: 2002. It is suitable for indoor power systems with a rated voltage of 24 kV for three-phase alternating current at a frequency of 50(60) Hz.
It has the capability of closing a short circuit, which can protect other electrical equipment within the switchgear from damage. It can be used in combination with various high-voltage switchgear cabinets and serves as a grounding protection when high-voltage electrical equipment is under maintenance.
Normal Operating Conditions of JN15-24 Indoor High-Voltage Grounding Switch:
◇ The altitude does not exceed 1000m;
◇ Ambient air temperature: The upper limit is +40℃, and the lower limit is -25℃;
◇ The daily average relative humidity is not more than 95%, and the monthly average relative humidity is not more than 90%;
◇ The seismic intensity does not exceed 8 degrees;
◇ Pollution grade: II.
Main Technical Parameters of JN15-24 Indoor High-Voltage Grounding Switch:
| Serial Number | Item | Unit | Parameter |
|
|---|
| 1 | Rated Current | kA | 12 |
|
| 2 | Rated Short-Time Withstand Current | kA | 31.5 |
|
| 3 | Rated Short-Circuit Duration | S | 4 |
|
| 4 | Rated Short-Circuit Making Current | kA | 80 |
|
| 5 | Rated Peak Withstand Current | kA | 80 |
|
| 6 | Rated Insulation Level | 1min Power Frequency Withstand Voltage | kV | 42 |
|
| Lightning Impulse Withstand Voltage | 75 |
|
| 7 | Mechanical Life | Times | 2000 |
|
Appearance and Installation Dimensions of JN15-24 Indoor High-Voltage Grounding Switch:
