| Insulator type |
AC anti-pollution type |
| GB standard No. |
XHP-240 |
XHP-300 |
XHP4-300 |
| Fig |
1 |
1 |
2 |
| Specified mechanical load (kN) |
240 |
300 |
300 |
| Class |
U240BSP |
U300B |
U300BP |
| Nominal unit spacing (mm) |
170 |
195 |
195 |
| Nominal diameter (mm) |
320 |
320 |
380 |
| Nominal creepage distance (mm) |
550 |
485/505 |
690 |
| Ball & socket size |
24 |
24 |
24 |
| Electro mechanical failing load (kN) |
240 |
300 |
300 |
| Mechanical routine test load (kN) |
120 |
150 |
150 |
| Power frequency withstand voltage |
Dry (kV) |
90 |
80 |
100 |
| Wet (kV) |
55 |
45 |
60 |
| Lightning impulse withstand voltage (kV) |
135 |
130 |
140 |
| Power frequency puncture voltage (kV) |
130 |
130 |
140 |
| Radio interference voltage |
Test voltage to ground (kV) |
10 |
10 |
10 |
| Max . RIV at 1MHz (μV) |
50 |
50 |
50 |
| Weight (kg) |
15.5 |
14.6 |
21.0 |
| Applicable standard: GB IEC AS BS IS |
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