69KV substation lightning arrester

1 Metal Oxide varistor 2 Polymer housing 3.Distribution class surge arrester 4.Composite ZnO type 5.ISO certificate

 NO.1 Brief Introduction:

 

Lightning arrester (surge arrester) housed in porcelian and polymer housings, is developed to protect switchgear, overhead lines, transformers, and other equipment against atmospheric or a system-immanent over-voltage.

In medium-voltage distribution systems the arresters are widely spread over the whole network as they are normally directly arranged either, for instance, at the pole-mounted transformers, or at the cable terminations.

 NO.2 Construction:

 

Certain designs of the polymer housed arresters were in fact impossible to construct until the gapless metal-oxide technique was introduced. As a major progress, metal oxide arresters could be built with only one single effective active element, namely the column of the metal oxide resistors. High demands are, however, made on these metal oxide resistors, as they combine all the functions, which previously had been shared among the different components of the gapped arrester. In this way they have to be ageing resistant while being subjected to constantly applied operating voltage. They must be able to absorb the energy injected during a discharge, and they should subsequently limit the follow current (leakage current) to value small enough for thermally stable operation.

The metal oxide resistor column, together with the accompanying supporting construction comprises the active part of the arrester. The column consists of individual metal oxide resistors stacked on top of each other. The metal oxide resistors are almost always produced in a cylindrical form. Their diameter decisively determines the energy absorption and the current carrying capability. It is within a range of about 30mm when used for distribution systems and up to 100mm or more for high and extra-high voltage systems and special applications, for which high energy absorption capabilities are required.

NO.3 Characteristics:

Non-tracking and low erosion rates in polluted an non-polluted environments, long term weather ability,resistance to thermal ageing,UV resistance,chemical resistance.Tough, tear and impact resistance.

NO.4 Technical Parameters:

Model	Arrester Rated Voltage	MCOV	1/10μs Steep Current Impulse	8/20μs Lightning Current Impulse	30/60μs Switching Current Impulse	2ms Rectangular Current Impulse	4/10μs High Current Impulse
	kV(r.m.s)			<kV		A	kA
HY10W-66	66	52.8	196	175	145	250	100
HY10W-69	69	55.2	205	183	152	250	100
HY10W-72	72	57	214	191	158	250	100
HY10W-75	75	60	223	199	165	250	100
HY10W-84	84	67.2	244	218	181	250	100
HY10W-90	90	70	249	222	184	250	100
HY10W-96	96	76	265	237	197	250	100
HY10W-108	108	84	298	266	221	250	100
HY10W-120	120	98	330	295	245	250	100

 

NO. 5 More Photos & Drawing:

  

NO. 6  Packing Details:

  

P.S.:

Safety and reliability are vital in high-voltage products and Wenzhou Mingneng Electric Co., Ltd is committed to pioneering improvements in performance for our customers at all levels. Our development teams work to generate a superior range of high performance products. All products developed using our extensive service experience and within the constraints of international standards including IEC and many national standards.

If you are interested in any item of our products, please don't hesitate to inquire us.

69KV substation lightning arrester