Casing
Product Overview
This series of bushings is manufactured using the epoxy resin automatic pressure gelation (APG) process and is intended for use in packaged equipment rated at 35 kV and below as insulated, isolated connection transitions.
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 |
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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