Home ProductsMetal Oxide Varistor

MOA Metal Zinc Oxide Varistor Resistor Disc With KEMA For Surge Arrester

Good quality Lightning Surge Arrester for sales
Good quality Lightning Surge Arrester for sales

——

I'm Online Chat Now

MOA Metal Zinc Oxide Varistor Resistor Disc With KEMA For Surge Arrester

China MOA Metal Zinc Oxide Varistor Resistor Disc With KEMA For Surge Arrester supplier
MOA Metal Zinc Oxide Varistor Resistor Disc With KEMA For Surge Arrester supplier MOA Metal Zinc Oxide Varistor Resistor Disc With KEMA For Surge Arrester supplier

Large Image :  MOA Metal Zinc Oxide Varistor Resistor Disc With KEMA For Surge Arrester

Product Details:

Place of Origin: Zhejiang,China(Mainland)
Brand Name: YONGDE
Certification: ISO9001/KEMA
Model Number: D28

Payment & Shipping Terms:

Minimum Order Quantity: 1pcs
Price: negotiation
Packaging Details: carton
Delivery Time: 20 working days after received your payment
Payment Terms: T/T or western Union or L/C or PayPal, MoneyGram, D/P, D/A
Supply Ability: 30,000pcs per month
Contact Now
Detailed Product Description
Genre: Metal Oxide Varistor Use: For Surge Arrester
Function: Protection Diameter: 28mm
Color: Silvery Gey Quality: High

MOA Metal Zinc Oxide Varistor Resistor Disc With KEMA For Surge Arrester

 

Introduction:

 

A varistor remains non-conductive as a shunt-mode device during normal operation when the voltage across it remains well below its "clamping voltage", thus varistors are typically used for suppressing line voltage surges. However, a varistor may not be able to successfully limit a very large surge from an event like a lightningstrike where the energy involved is many orders of magnitude greater than it can handle. Follow-through current resulting from a strike may generate excessive current that completely destroys the varistor. Lesser surges still degrade it, however. Degradation is defined by manufacturer's life-expectancy charts that relate current, time and number of transient pulses. The main parameter affecting varistor life expectancy is its energy (Joule) rating. As the energy rating increases, its life expectancy typically increases exponentially, the number of transient pulses that it can accommodate increases and the "clamping voltage" it provides during each transient decreases. The probability of catastrophic failure can be reduced by increasing the rating, either by using a single varistor of higher rating or by connecting more devices in parallel. A varistor is typically deemed to be fully degraded when its "clamping voltage" has changed by 10%. In this condition it is not visibly damaged and it remains functional (no catastrophic failure).

 

Specifications:

 

D28 Metal Oxide Varistor(MOV):

Type D28 Metal Oxide Varistor(MOV)
Specification mm D28*24
Voltage Gradient V/mm 210~235
Square Wave Test Valve 200
4/20μ S High Current Withstand kA 65
8/20μ S high current withstand kA 10
DC1mA Refering Voltage kV 5.3
0.75Times U1mA Leak current μ A < 10
Residual Votage Ratio 1.88
Aging Load Point Ratio% 85

production-varistor85-2_02.jpg

 

About us:

 

Yongde holds the quality policy of being 'the technical forerunner, supreme in quality, supremacy of customers, and innovative progressing', so that our products and services successfully satisfied our users. We warmly welcome friends and customers from home and abroad to contact for exchanges and corporations. We also welcome feedbacks from our user communities.

Contact Details
Hangzhou Yongde Electric Appliances Co.,Ltd

Contact Person: Matt

Send your inquiry directly to us (0 / 3000)