| Insulator type |
AC normal type |
| GB standard No. |
XP-240 |
XP-300 |
XP-400 |
XP-420 |
XP-530 |
| Fig |
1 |
1 |
2 |
2 |
3 |
| Specified mechanical load (kN) |
240 |
300 |
400 |
420 |
530 |
| Class |
U240BS |
U300B |
U400BS |
U420BS |
U530BS |
| Nominal unit spacing (mm) |
170 |
195 |
205 |
205 |
240 |
| Nominal diameter (mm) |
280 |
320 |
360 |
360 |
380 |
| Nominal creepage distance (mm) |
405 |
370 |
525 |
550 |
600/700 |
| Ball & socket size |
24 |
24 |
28 |
28 |
32 |
| Electro mechanical failing load (kN) |
240 |
300 |
400 |
400 |
530 |
| Mechanical routine test load (kN) |
120 |
150 |
200 |
200 |
265 |
| Power frequency withstand voltage |
Dry (kV) |
75 |
75 |
90 |
90 |
95 |
| Wet (kV) |
45 |
45 |
50 |
50 |
55 |
| Lightning impulse withstand voltage (kV) |
110 |
110 |
140 |
140 |
140 |
| Power frequency puncture voltage (kV) |
120 |
120 |
130 |
130 |
140 |
| Radio interference voltage |
Test voltage to ground (kV) |
10 |
10 |
10 |
10 |
10 |
| Max . RIV at 1MHz (μV) |
50 |
50 |
50 |
50 |
50 |
| Weight (kg) |
11.4 |
13.5 |
18.5 |
19.5 |
23.5/27.0 |
| Applicable standard: GB IEC AS BS IS |
Service Tel: 86-799-7616888
