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→ Overview
Modular three-phase overvoltage protection device (three-phase composite arrester) is used to protect electrical equipment against over-voltage insulated electrical hazard protection, is a new type of arrester, which limits over-voltage between phase to the same time, effective on the white over-voltage limit is widely used to protect the vacuum switch, rotary motor, parallel compensation capacitor, power plants, substations, etc., packed arrester has been in operation for over ten years, proven to be a practical and effective measures to limit over-voltage phase, a combined arrester arrester can play the role of six ordinary. As the use of high-capacity internal arrester zinc oxide varistor as the main component, it has a good volt-ampere characteristics and the ability to absorb the over-voltage, to protect the equipment to provide reliable protection, has been widely used for the power system.
→ Implementation of the standards
This product implementation GB GB11032-2000 "metal oxide surge arresters without gaps for AC", JB/T10496-2005 "AC three-phase composite metal oxide surge arresters without gaps", ZBK 49005-90 "AC system metal oxide with a series gap arrester ", JB/T8459-1996" arrester Model methodology. "
→ Structural features
1. Form compact, high voltage insulation, greatly reducing the use and the use of space;
2. Molded composite jacket overall, has a good seal, explosion-proof, moisture resistant, anti-leakage trace, anti-electric corrosion, stain, water-repellent and good;
3. Novel and unique structure, technical performance, good electrical insulation properties;
4. High voltage cable connections to ensure that the insulation strength, flexible installation;
5. Small size, light weight, saving land, particularly suitable for installation in switch cabinet.
→ Conditions of Use
1. Altitude less than 2000m;
2. Ambient temperature: -40 ℃ ~ +40 ℃;
3. Power Frequency: 48Hz ~ 62Hz;
4. Applied to the arrester on the long-term frequency voltage does not exceed the arrester continuous operating voltage;
5. Maximum wind speed does not exceed 35m / s;
6. Seismic intensity of 7 degrees and the following areas.
→ Model Description
In accordance with national standards JB/T8459-1996 "arrester Model methodology" as:
HY □ □ □ □ – ( / ) X ( / )
| | | | | 1 2
| | | | | |----------|
| | | | | |___________Characteristics of digital
| | | | |___________________________Design number
| | | |_______________________________The use of premises
| | |___________________________________Structure
| |_______________________________________Nominal discharge current
|___________________________________________Product Type
1. Product Type: YH-said composite jacket (old model HY)
2. Structural characteristics: W-C-gap, said that no gap in series
3. The use of premises: Z-type power plant, said that protection of R-D-parallel compensation capacitor, said rotary motor protection
4. Characteristics of numbers: 1 - the number representing the relative phase characteristics; 2-- that the characteristics of numbers relatively
→ User Information
1. Put into operation before measuring the electrical parameters of protection, seamless U1mA DC voltage measurement, frequency measurement with series gap discharge voltage, its value can not be less than the manufacturer specified value;
2 seamless protection measures should be under 75% U1mA leakage current, and its value not greater than 50μA;
3. Put into operation 2 years after the DC should be monitored regularly U1mA voltage (discharge voltage or frequency), and put into operation before the numerical comparison with the rate of change should not exceed ± 5%;
4. Transportation, storage, unpacking and installation, not a strong impact;
5 users as there are special requirements for protection devices (such as cable length), can be given in the order specified.
→ over-voltage protection installed
Outline structure with reference to the installation. When first installing the bolt with the basic over-voltage protector plastic base, the base plate or directly fixed to the metal bottom shelf, four high-voltage cables were connected to the ABC in accordance with label side and ground (or ground by the discharge counter). Note: For wiring convenience, ABC end terminal phase sequence can be any swap (A, B, C three cell parameters, with no effect), but the ground phase units must discharge directly to ground or through the counter (or monitor) ground.
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Arrester series
