General

Zno lightning arrester is a kind of world advanced over-voltage protector at present, due to its core components of resistance applying Zno and other metal oxide to make of, comparing with traditional carborundum arrester, it improves greatly V-A characteristics of resistance increases the getting trough ability of resistance, thereby it brings fundamental change to features of arrester.
Under normal working voltage, the current passing arrester only is uA class, when bearing over voltage, the execellent non-linear V-A features of arrester would make effect, the curent passing through the arrester increase high to thousands of Amper instant, the arrester is under getting through state, to relesae over-voltage energy, therefore it effective limits the damage to power transmission equipments due to over voltage.

Usage feature

Zno lightning arrester is a kind of protecting equipment preventing
electric equipments in AC power system from high voltage and overvoltage
operation.

Model

Installation and operation

1. Before putting into operation, lightning arrester should accept preventive test before the comming of thunder rain season, thereinto, test items for arrester without gaps are external insulation measurement, DC UImA voltage measurement, current and resistandce current measurement under AC operating volatage; arrester with series gaps should accept external insulation measurement, electric conduction current measurement, power frequency voltage discharging test; preventive test can be omitted for lightning arrester with disconnector after being put into operation.
2. Power frequency withstand test for lightning arrester should not exceed the rated voltage value.
3. Don't dismantle the lightning arrester randomly.
4. Lightning arrester with disconnector will unable to keep working after tripping operation of disconnector.
5. Installation of lightning arrester should be carried out according to the specifications strictly, the two side should be connected firmly and should be earthed reliably.
6. When installing line type arrester with series gaps, please leave enough parallel distance between it and line insulator.

Notification for order

Product's name, model, product feature code, system voltage, quantity and delivery time.
Type selection of lightning arrester: select suitable model according to the grade of power grid, insulation level of equipment, protected object and
application site, on the premise of above conditions, it is better to choose lightning arrester of lower rated voltage.
Service conditions such as ambient temperature, altitude, class of pollution; if ther is any special requirement about medium frequency＞62Hz, high
altitude, near the heat source and so on, please negotiate with the manufacturer beforehand.

Transportation and storage of lightning arrester

Lightning arrester should be protected from impact, shake or knock during transportation or knock during transportation or storage. For porcelainclad lightning arrester and lightning arrester with gap in arcing chamber can not be placed upside down or horizontally. Storage site for polymeric housed metal oxide arrester should be free of acid or alkali corrosive chemicals, otherwise, metal fittings or the polymeric housing would be eroded, besides, for some warehouses, rodent control should be carried out, protecting the rubber sheds from being damaged.