AC Metal Oxide Lightning Arrester

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1. Product Overview
The AC metal oxide lightning arrester is an important device used to protect power systems from over-voltage damage. It uses the metal oxide varistor, which has excellent nonlinear volt-ampere and steep wave response characteristics, as the main component.

At rated voltage, the metal oxide varistor presents high resistance and only hundreds of microamps of current shows up. When atmospheric over-voltage or operating over-voltage occurs, the metal oxide varistor presents low resistance. It absorbs over-voltage energy and limits the over-voltage amplitude within the allowable range, thereby protecting the power transmission equipment.

2. Working Conditions

Ambient temperature	-40℃~ 40℃
Sunlight intensity	≤1.1kW/m2
Altitude	≤3000m
Power supply frequency	48Hz～62Hz
The power frequency voltage applied between the terminals for a long term should not exceed the continuous operating voltage of the lightning arrester.
Earthquake fortification intensity	Mercalli VIII
Wind velocity	≤35m/s

3. Product Structure
The core part of this AC metal oxide lightning arrester, i.e., varistor, is installed in a sealed can with steel shell. The shell is integrally molded, so that it prevents the external environmental factors affecting the internal components. The upper flange is connected with other components through a basin-type insulator. The center insulating rod is used for fixing and limiting the varistor.

The zinc oxide varistor is the key component of the surge protection device. Its number is determined according to the DC reference voltage and residual voltage of a single proportional element. There is no clearance between the varistors.

In addition, our product is equipped with a monitor which can effectively monitors the operational status of the arrester to ensure the security of the power system.

4. Technical Parameters

Usys System rated voltage	Product model	Ucov Continuous operating voltage kV	Ures Residual voltage ≤kVP			U1mA DC 1mA reference voltage	Uref Power frequency reference voltage (Resistive current: 1mA) ≥kV	2ms square wave A
Usys System rated voltage	Product model	Ucov Continuous operating voltage kV	1/4	8/20	30/60	U1mA DC 1mA reference voltage		2ms square wave A
110	Y10WF–100/260	78	291	260	221	145	100	800
	Y10WF–102/266	79.6	297	266	266	148	102	800
	Y10WF-108/281	84	315	281	239	157	108	800
220	Y10WF-200/520	156	582	520	442	290	200	800
	Y10WF–204/532	159.2	594	532	452	296	204	800
	Y10WF–216/562	168	630	562	478	314	216	800

Related Names
Lightning Surge Suppressor | Surge Protection Unit | Earthing Arrester

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