Gapless ZnO Surge Arrester

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Application

The Zinc Oxide arrester is the most advanced over-voltage protector in the world. This is due to the incorporation of a zinc oxide arrester as the core resistor disc.

This allows an improvement in the volt-ampere characteristics of the resistor disc and an increase in through – current capability in over-voltage situations, which is a drastic improvement when compared to conventional silicon carbide arresters.

Under normal operating voltage, the current through the arrester is only one micro-ampere degree. When the arrester experiences an over-voltage situation, the excellent non linear characteristics will increase the current through the arrester several thousand times. The arrester is in the conducting state and will release the over-voltage energy to earth and thereby protecting power transmission equipment against the effects of over-voltage.

The Technical performance of the product is in conformity to IEC60099-4 & IEEE.C62.11 standard technical requirements.

 Working conditions

1. The ambient air temperatures is no higher than + 0°C, no lower than -40°C.

2. The altitude above sea level does not exceed 1000-2000m (the plateau area should be indicated when order).

3. AC system frequency 50Hz or 60Hz.

4. Power frequency voltage brought to bear on arrester for a long time does not exceed arrester's continuous operation voltage.

5. Maximum wind speed does not exceed 35m/s.

6. The earthquake intensity does no exceed 7 degrees.

7. The filthy area should be given clear indication.

Functional characteristics

Ref.model		YH5W-3	YH5W-6	YH5W-9	YH5W-20	YH5W-30	YH10W-3	YH10W-6	YH10W-9	YH10W-20	YH10W-30
Syetem nominal voltage/highest (kV ms)		3.3/3.6	6.6/7.25	11/12	22/24.2	33/36	3.3/3.6	6.6/7.25	11/12	22/24	33/36
Rated voltage of arrester(kV)		3	6	9	20	30	3	6	9	20	30
Maxi continuous operating voltage(kV)		2.55	5.1	7.65	19.5	24.4	2.55	5.1	7.65	17	24.4
DC reference voltage≥kV		5	8	18	35	65	5	8	18	35	65
Maxi discharge residual voltage(kV crest)	Under operating impulse current	7.7	15.4	23.1	53.9	76.5	7.7	15.4	≤29	53.9	≤90
	Under 8/20 μ s lightning impulse current 8/20 μ s	9	18	27	63	90	9	18	30.5	63	95
	Under steep impulse current	9.5	19	28.5	66.5	95	9.5	19	≤32	66.5	≤99
2ms rectangular impulse withstand current(A)		100					100
4/10 μ s high impulse withstand current(kA)		65					65
Minimum power frequency  withsstand voltage(kV,rms)	Wet	20	30	≤50	60	80	20	≤50	30	60	90
	Dry	24	35	≤70	80	90	24	35	≤70	80	95
Impulse withsstand voltage(kV,crest)		48	70	95	125	170	48	70	95	125	170
Pressure relief class(kV,crest)	high current for 0.2s	16					16
	Low current for 0.5s	0.8					0.8
creepage(mm)			250	390	550	900	180	250	390	550	900

Your requirement other than above, we can design and produce.