Insulator
Product Overview
This insulating component is used in indoor power systems with a rated voltage of 10 kV and below, serving as the core insulation element of the power system. It is manufactured using an advanced APG pressure impregnation process and high-performance epoxy resin, resulting in outstanding dielectric, electrical, and mechanical properties. The component is installed inside medium-voltage switchgear or other switch cabinets to support and secure busbars and live conductors, ensuring adequate clearance between live conductors and earth.
Terms of Use
1. Application environment: indoor use, no dripping water, no risk of flammability or explosion, and no chemically corrosive gases.
2. Altitude (m): Not exceeding the standard value of ≤1000; when a specific altitude is specified, altitude correction shall be applied.
3. Ambient temperature (°C): Maximum temperature (24-hour average): +40°C; Minimum temperature: -25°C; Daily temperature range: <25 K
4. Humidity: Daily average relative humidity: ≤95%; monthly average relative humidity: ≤90%.
5. Relative humidity range requirement (%): ≤95%
6. Seismic Performance Requirements: Seismic Intensity: 8, Horizontal Ground Acceleration: 0.3g, Vertical Ground Acceleration: 0.15g
7. Contamination Level: Class II
Implementation Standard
GB311.1-2012
GB/T 4109-2022
GB/T 3906-2020
GB7354-2003
GB/T 5582-1993
GB/T 5169.16-2008
GB/T 11022-2020
Technical Specifications
Serial Number |
Project |
Unit |
Standard parameter value |
||
1 |
Rated voltage |
KV |
3.6 ~40.5 |
||
2 |
1-minute power-frequency withstand voltage (effective) |
KV
|
Table 1
|
||
3 |
Rated lightning impulse voltage (peak) |
||||
4 |
Partial discharge quantity |
PC |
Table 2 |
||
5 |
Creepage distance to voltage |
mm/kv |
≥20 |
||
6 |
Clearance for Air Insulation |
mm |
≥125 (for 12 kV) |
||
≥180 (for 24 kV) |
|||||
≥300 (for 40.5 kV) |
|||||
7 |
Flame-retardant rating |
✘ |
Subject to customer requirements. |
||
8 |
Environmental Testing |
High-temperature test |
degrees Celsius |
140 (24h) |
|
9 |
Low-temperature test |
degrees Celsius |
-40 (24h) |
||
10 |
Thermal cycling test |
degrees Celsius |
-40 to 125°C, 5 cycles, with a 2-hour interval |
||
Test voltage
Rated voltage Ur (kV) |
System nominal voltage Un (kV) |
1-minute power-frequency withstand voltage RMS value Ud Kv |
RMS value of lightning impulse voltage Up Kv |
||
General Value |
|
||||
3.6 |
3 |
25 |
27 |
40 |
46 |
7.2 |
6 |
32 |
34 |
60 |
70 |
12 |
10 |
42 |
48 |
75 |
85 |
24 |
20 |
65 |
79 |
125 |
145 |
40.5 |
35 |
95 |
118 |
185 |
215 |
Partial discharge
Equipment rated voltage |
Apply voltage Kv |
Partial Discharge Measurement Voltage Kv |
Allowable partial discharge quantity PC |
Your |
1.3Ur |
1.1Ur |
≤3 |
Tightening Torque Values for Steel Bolts
Bolt specification (mm) |
Torque value (N·m) |
M8 |
8.8–10.8 |
M10 |
17.7–22.6 |
M12 |
31.4–39.2 |
M14 |
51.0–60.8 |
M16 |
78.5–98.1 |
M18 |
98–127.4 |
M20 |
156.9–196.2 |
M24 |
274.6–343.2 |
Sensor capacitance
Rated voltage |
Sensor capacitance (pF) |
One-to-two capacitance (Pf) |
3.6 |
250±25 |
|
7.2 |
150±15 |
250±25 |
12 |
120±15 |
200±15 |
24 |
80±10 |
120±15 |
40.5 |
45±10 |
80±10 |
Outline Dimension Drawing (mm)
Contact Us
0411-83167110
No. 95, West Section of Shiji Road, Pulandian District, Dalian City, Liaoning Province
Leave a message to get a product quote.
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