How does ZnO varistor work? ZnO has good non-linear Volt-Ampere characteristics which flowing current is tiny when working under normal voltage. However, when there's over-voltage, its non-linear Volt-Ampere characteristics takes protection effect on leakage and breaking current, as the resistance will decrease rapidly and leak the energy of over-voltage.
Products are completely in accordance with IEC60099-4 standard.
1.The ambient temperature is not high than +40 celsius and not lower than -40 celsius.
2.The altitude above sea level do not exceed 1000-2000m.(Altiplano area should be indicated when order.)
3.The frequency in AC system is 50Hz or 60Hz.
4.Power frequency voltage which has been bearing on arrester for a long time do not exceed continuous operating voltage.
5.Max. wind speed do not exceed 35m/s.
6.Apply to the area where earthquake intensity is not exceed 8 degree.
7.The filthy area should be indicated before.
| Electrical characteristics | Specification | Unit | |
| Rated voltage of Surge arrreser | 24 | kV | |
| Nominal discharge current | 5 | 10 | kA |
| Rated frequency | 50 | Hz | |
| Maximum continuous operating voltage | 19.5 | kV | |
| Steep current impulse residual voltage | 82 | kV(Crest) | |
| Lightning Impulse residual voltage | 72 | kV(Crest) | |
| Switching Impulse residual voltage | 62 | kV(Crest) | |
| Long duration current impulse withstand voltage | 150 | 250 | A |
| High current impulses | 65 | 100 | kA (Crest) |
| Rated Short-circuit current | 20 / 12 / 6 / 0.6 ± 0.2 | kA | |
| Class of Surge arrester | Class 1 or Class 2 | ||
| Application | Distribution type | ||
| With or without gap | Gapless | ||
| Designation of arrester | Design B | ||
| Spare parts | |||
| NEMA A or B mounting bracket | with/without | ||
| Disconnector | with/without | ||
| Earth lead | with/without | ||
| Bird guard cap | with/without | ||
| Line clamp | with/without | ||
| Upper terminal (incoming line) bolt size | M12 | ||
| Lower termina (outgoing line) bolt size | M10 | ||
| Material | |||
| Upper terminal | Stainless steel 304 | ||
| Housing | Polymer type | ||
| Color of housing | Dark grey / light grey | ||
| Varistor | High quality zinc oxide varistor | ||
| Size of Varistor | 35mm / 38mm /40mm / 42mm | ||
| Package | |||
| Qty/package | 3 | pc/carton | |
| Service conditions | |||
| Environment maximum temperature | 40 | ºC | |
| Pollution level | Heavy | ||
| Altitude | ≤1000 | Meter | |
| Standard | IEC60099-4:2014 | ||
1.The low weight facilitates installation and permits erection in limited spaces and at almost all angles.
2.No continuous current and low current impulse residual voltage.
3.Excellent pollution and short circuit performance.
4.Safe to touch when energised by accident.
5.Stable U-I characteristics,even after multiple strikes.
6.Resistant to UV,ozone,chemicals,mechanical abuse.
7.Fully qualified following IEC60099-4.
8.Using best material.9.Type test report from KEMA lab
Package:1 pc of cut out fuse is packed in a carton.
Outer packing:Pallet or wooden case.
Or as per customers' request.
Large quantity of cut out fuse can be by sea or by air according to customers' instruction.
Several pieces of samples can be shipped by express.
