Metal Oxide Surge Arrester for Railway Multiple Units Surge Production a. C.

Type: Power Source Arrester


Installation: Parallel Arrester


Size: Meidum


Shape: Spiral


Certification: ISO9001


Features: Reduced Line Maintenance,Good Sealing,Explosion-Pr


Origin: Jiangyin Yunfeng, China




Structure: Zinc Oxide Arrester


Application: AC/DC System


Operation Voltage: High Voltage


Material: ZnO


Function: Protect Electrical Devices in a.C.Power System


Trademark: YF


Brife Introduction

In order to coordinate our country multiple units can make the perfect combination with our country.Our company unifies the technical parameters of foreign overvoltage protection,using the Zinc oxide varistor's superior voltage versus current,specially develop MOA for railway multiple units safe operaration to prvide reliable protection.





Service conditions

---Ambient air temperature within the range of -45-+45ºC

---Power frequency within the range fo 16.7-50HZ

---Seism richter scale:7 degree

---Max. wind speed:45m/s





Technical parameters of MOA are shown in the table

Specifications of MOA for railway multiple units surge Production A.C.

Code	Max.Ucov (kv)	Urat kv	Loghtning impulse Ures kv			Switching impulse Ures kv		Steep impulse Ures kv	Energy absorption capacity	Transmission line discharge degree	High current impulse withstand kA
			5	10	20	125A	500A
DH-42	31	42	106	115	130	82.7	82.8	117	4.5	2	100

Metal Oxide Surge Arrester(MOA) without Gaps for A.C.Sytems

Product Overview

MOA is composed of metal oxide varistors,housing(porcelain or silicon rubber),base,upper cover,grading ring etc.Our products have excellent performance in accordance with IEC international standard IEC600 99-4(2000) and China National Standard GB11032-2000 for "Alternating Current Gapless MOA".Polymeric housed MOA manufactured by AMTECH features small size,lightweight,simple manufacturing process,good sealing,explosion-proof,long working life,wounded-proof,high pollution resistance and reduced line maintenance,etc.



MOA Classification Code





Gapless arrester electrical parameter

Type	Rated voltage	MCOV	Residual voltge(kv)			Wave impluse withstand current 2000µ S square	Current impluse 4/10µ S high
			Steep impluse current	Switching impluse current	8/20 µ Lightning impluse current
YH10W-3	3	2.55	9.5	7.7	9	250	100
YH10W-6	6	5.1	19.5	15.4	18	250	100
YH10W-9	9	7.65	28.5	23.1	27	250	100
YH10W-10	10	8.4	36	30	23	250	100
YH10W-11	11	9.4	40	33	30	250	100
YH10W-12	12	10.2	38.0	30.8	36	250	100
YH10W-15	15	12.7	47.5	38.5	45	250	100
YH10W-18	18	15.3	57.0	46.2	54	250	100
YH10W-21	21	17.0	66.5	53.9	63	250	100
YH10W-24	24	19.2	76.0	61.6	72	250	100
YH10W-27	27	21.9	85.5	69.3	81	250	100
YH10W-30	30	24.4	95.0	76.5	90	250	100
YH10W-33	33	26.8	104.5	84.7	99	250	100
YH10W-36	36	29	114.0	92.4	108	250	100
YH10W-42	42	34.1	132.3	100.1	126	250	100
YH10W-48	48	39	152.0	126.0	150	250	100
YH10W-54	54	43	171.0	139.0	162	250	100
YH10W-60	60	48	208.0	160.0	180	250	100
YH10W-66	66	52.8	230.0	172.0	198	250	100

Note:Please drop "H" if it is porcelain arrester.



Main principie

Zinc-oxide lightning arrester is the most advanced Over-Voltage Protector at present in the world. The voltage current characteristic of the varistor has been changed compared with traditional carborundum arresters due to the multiple metal oxide materials application in the core element-varistor,which has greatly improved the varistor's throughput capacity and brought thorough change to arresters'characteristics.

When arrester is under normal voltage,there is only microamp current through it .When it is under high voltage,arresters'excellent nonlinear voltage current feature gets into play,so the current through arresters will reach thousands of amperes and the arresters are at conducting status,releasing over-voltage energv to effectively protect the power transmission equipments from damage caused by over voltage.



Application and features

Zinc-oxide lightning arrester is protective equipment for electrical devices in A.C.power system from damage caused by over voltage or over-voltage operation.

Contact us if you need more details on Over-Voltage Protector. We are ready to answer your questions on packaging, logistics, certification or any Other aspects about A. C. Power System、Lightning Arrester. If these products fail to match your need, please contact us and we would like to provide relevant information.

Product Categories : MOA Without Gaps