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 METAL
OXIDE SURGE ARRESTER
For meeting with safety operation of power
system, many types of ceramics housed MOA and polymeric housed MOA
for 220kV and under system are under way in our company. Based on
the protection characteristic and usage traits, our company has developed
many products, for example: MOA without gaps, MOA with series gaps,
MOA for transformer neutral , MOA for capacitor protection, MOA for
rotating machinery and line protection, MOA with arm type and so on.
The ZnO varistors made under advanced manufacture arts and crafts
have good response to excellent voltampere characteristics , steep
front surge and high discharge capacity. Products' performance achieves
the first level in China.
In addition to advantages of traditional MOA, the polymeric housed
MOA features small size, low weight and high pollution resistance.
The installation mode is optional. They can be installed upstanding
or suspended on towers, providing on-line protection to reduce the
overvoltage level in system as a whole.
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一、Designation of Type Letters
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二、Polymeric Housed MOA for 0.22～220kV System
The polymeric housed
MOA have good response to excellent voltampere characteristics , steep
front surge , high discharge capacity, and low residual voltage of
switching surge. It features small size, low weight and high pollution
resistance and provides overvoltage protection of 220kV and under
220kV system.
Technical datum meet with national standard JB/T8952-1999 and GB11032-2000.
The technical parameters are given in Tab 1. |
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Tab 1. Polymeric Housed
ZnO arrester for 0.22～220kV System a.c.
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Type code
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System voltage (kV)
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Rated voltage (kV)
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Cont.oper.
Voltage(kV)
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U1mAD.C≮
kV
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Rated dischargeresidual
voltage≯kV
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a.c.refer voltage≥kV
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Rectangular 2ms withstand
discharge capacity (A)
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YH1.5W-0.28/1.3
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0.22
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0.28
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0.24
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0.60
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1.3
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0.28
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75
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YH1.5W-0.5/2.6
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0.38
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0.5
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0.42
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1.20
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2.6
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0.5
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75
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YH5WS-17/50
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10
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17
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13.6
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25
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50
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17
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100,150
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YH5WZ-17/45
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10
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17
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13.6
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24
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45
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17
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400
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YH5WR-17/45
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10
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17
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13.6
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24
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45
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17
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400,600
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YH5WT-42/120
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27.5
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42
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34
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65
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120
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42
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400,600
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YH5WZ-51/134
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35
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51
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41
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73
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134
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51
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400,600
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YH1.5W-30/85
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35
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30
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30
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48
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85
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30
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400,600
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YH10W-100/260
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110
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100
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78
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145
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260
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100
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600,800
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YH1.5W-73/200
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110
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73
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58
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103
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200
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73
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600,800
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YH10W-200/520
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220
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200
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156
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290
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520
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200
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600,800
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YH10W-204/532
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220
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204
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159
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296
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532
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204
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600,800
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YH1.5W-144/320
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220
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144
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116
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205
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320
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144
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600,800
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Note: YH-polymeric housed
MOA.
Y-porcelain mental oxide type |
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