U120B Suspension Porcelain Insulator
- 120kN Suspension Tension Cap and Pin Disc Porcelain /Ceramic Insulator IEC Standard U120b .
- U120B is a common suspension ceramic insulator with a rated mechanical failure load of 120kN, and its structural height is commonly 127mm or 146mm.
- Voltage level: Suitable for high-voltage and ultra-high voltage AC/DC overhead transmission lines ranging from 10kV to 330kV.
- Line type: widely used in high-voltage and ultra high voltage AC and DC transmission lines, as a key component of insulation and suspension conductors.
- Environmental area: mainly used in ordinary areas with clean air and light pollution. For example, areas with better natural environments such as rural areas, mountains, and forests.
- Brand: QOCI
- Catalog ID: U120B/XP-70
- Type: Suspension Insulator
- Material: Porcelain
- Place of Origin: Jiangxi
Dimensional data
|
Spacing (S) |
5 3/4 inch 146 mm |
|
Diameter (D) |
10 inch 254 mm |
|
Leakage distance (C/D) |
12 5/8 inch 320 mm |
|
Dry arcing distance： |
7 3/4 inch 197 mm |
| Coupling size： |
16 mm Type J |
Mechanical values
|
Combined M&E strength: |
25,000 lb 111 kN |
| Impact strength : |
90 inch-lb 10 N·m |
| Routine proof test load: |
12,500 lb 55.5 kN |
| Time load test value: |
15,000 lb 57 kN |
| Maximum working load |
12,500 lb 55.5 kN |
Electrical Values
|
Low frequency dry flashover voltage: |
80kV |
|
Low frequency wet flashover voltage: |
50kV |
|
Critical impulse flashover voltage, positive: |
125kV |
|
Critical impulse flashover voltage, negative: |
130kV |
|
Low frequency puncture voltage: |
110kV |
Radio-influence Voltage
|
RIV test voltage rms to ground Maximum RIV at 1000 kHz |
10kV 50μV |
|
Corona visual lest P/C |
18/22KV |
Packing information
|
Approx. net weight per unit |
5.2kg |
|
No. of insulators wooden crate |
6 |
Industry Standard(s)
Tests and dimensional tolerances are in accordance with GB/T1001.1-2021.
Drawing
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