Product Description:

Protection of medium/high voltage AC networks againt both, multiple atmospheric and switching overvoltages as well as Very Fast Transients(VFT).Suitable for the protection of transformers,transformers in arc furnace application,cables,generators,parallel to capacitor banks,and railway vehicles.Metal Oxide Surge Arrester can be used mechanically as support insulator or as suspension insulator in case of application as line arrester for indoor and outdoor installation.

Keystone:

The Metal-Oxide Surge Arrester(MOSA)is the most advanced overvoltage protector in the world. Due to make the varistor of core component mainly adopt MOSA. Compared with the conventional silicone carbide arrester,this prescription of the product improves greatly the Voltage-Current(U-I) characteristic of the metal-oxide varistor and increased through-current capability at over-voltage so as to bring a radical-changes for the characteristic of the MOSA.
Under the circumstance of normal operating voltage,the current through the MOSA just on microampere degree.When suffered from overvoltage,the MOSA'sexcellent none-linear characteristic will make the current through the MOSA increase to several thousand ampere,while the MOSA will be under the circulating state and release overvoltage energy so as to protecting the power transmission equipments against the damage caused by the overvoltage.

Usual Service Condition:

a)Ambient air temperature within the range of -55℃to+55℃.
b)Altitude not exceeding 2000m.
c)Frequency of the A.C.power supply not less than 48Hz and not exceeding 62Hz.
d)Power frequency voltage applied continuously between the terminals of the arrester not exceeding its continuous operating voltage.
e)Maximun wind speed not exceeding 35m/s.
f)Earthquake intensity not exceeding 7 degrees.

Advantage (SWITOL MOSA):

a)Low residual voltage
b)Long protection distance
c)High energy input capacity
d)Stable U-I characteristic even after multiple strokes
e)Proof against ageing
f)Explosion and shatter-resistant design
g)Pollution resisitant and UV-stable
h)Housing resistant to rough handing
i)Stable against shock and vibration
j)High mechanical resistance