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|Rated Voltage:||40.5 KV||Rated Short Duration:||2S|
|Rated Peak Withstand Current:||80 KA|
high voltage earthing switch,
disconnector earthing switch
JT8-40.5 Series indoor AC high voltage grounding switch
1. Product Description
JT8(JN)-40.5 Type indoor AC high voltage grounding switch according to IEC standards within the design of indoor high-voltage electrical appliances. It is a metal or other armored metal enclosed switchgear main components. 40.5KV rated voltage and below the three-phase AC 50Hz power system as a grounding and protection purposes.
2. Type meaning
J T 8 - 40.5 / - 0
J: earthing switch
T: Cheonan products (business code)
8: design number
40.5: Rated voltage (KV)
0 : Rated short time withstand current (thermal stability current KA / 4s)
0 : rated short-time closing current (kA)
3. Grounding switch Technical Data
|2||Rated short time within tolerance (heat-stable) current (RMS 4s)||kA||25||31.5|
|3||Rated peak withstand (dynamic stability) current (peak)||kA||63||80|
|4||Rated short-circuit current (peak)||kA||63||80|
|5||Rated insulation level||kV||95||185|
|6||Phase distance||mm||350, 410, 460|
|7||Closing speed||m /s||>= 4|
|8||Positive pressure contacts||N||450±50|
|9||Sub-closing operation torque||N.m||=< 200|
|10||Mechanical life||time||>= 2000|
4. Structure Introduction
JT8(JN)-40.5 Type indoor high voltage grounding switch from the undercarriage, touch knife, insulator voltage display devices (sensors), closing spring, and three-phase short-circuit connection contact copper components.
Brace is bent plate welded into a rectangular frame. Supply at both ends with the assembly of the spindle bearings and bearing; a display device voltage insulator (sensor) installed in the bottom frame and top with J-type contact and bearing; touch knife spindle mounted welding Shui arm, by closing spring drive shaft and drive the touch knife switch on, so as to achieve the purpose of closing short-circuit current.
When open and close, as long as the operating handle is rotated with the spindle drive shaft coupled to the spring over the dead point, closing by spring force acceleration. After closing the main shaft connecting the crank arm and the operating shaft into a dead point, it is possible to closing short-circuit current, touch knife does not open when the dynamic current test.
5. Ordering Information
The grounding switch for a wide range of products please specify the user type, size, distance, or gear crank arm mounting position (left or right), whether with live display device. User if there are special requirements, when ordering.
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