Three Phase Combined Arrester
Three phase combined zinc oxide arrester with composite sheath is a new type of protective appliance used to protect the insulation of power equipment from over-voltage hazards. It effectively limits the over-voltage between phases while limiting the over-voltage between phases and ground. It is widely used to protect vacuum switches, rotating motors, parallel compensation capacitors, power plants, substations, etc. This kind of combined arrester has been used for more than ten years, and the practice has proved that it is a practical and effective measure to limit the interphase overvoltage. Large capacity zinc oxide resistor is used as the main element inside the arrester, which has good volt ampere characteristics and the ability to absorb overvoltage. It provides reliable protection for the protected equipment, and has been widely used in the power system at present.
Three phase combined zinc oxide arrester with composite sheath is a new type of protective appliance used to protect the insulation of power equipment from over-voltage hazards. It effectively limits the over-voltage between phases while limiting the over-voltage between phases and ground. It is widely used to protect vacuum switches, rotating motors, parallel compensation capacitors, power plants, substations, etc. This kind of combined arrester has been used for more than ten years, and the practice has proved that it is a practical and effective measure to limit the interphase overvoltage. Large capacity zinc oxide resistor is used as the main element inside the arrester, which has good volt ampere characteristics and the ability to absorb overvoltage. It provides reliable protection for the protected equipment, and has been widely used in the power system at present.
□ Executive standard
This product complies with the national standard GB11032-2000 AC Gapless Metal Oxide Arrester, and the composite jacket products also comply with JB/T8952-2005 Composite Jacket Gapless Metal Oxide Arrester for AC Systems, JB/T10496-2005 AC Three Phase Composite Gapless Metal Oxide Arrester, and JB/T8456 Preparation Method of Arrester Product Model.
□ Structural characteristics Gunnefa
The star connection of four elements is adopted to protect the overvoltage between phases and between phases; The ingenious coordination in structure makes one combined arrester play the role of six ordinary arresters, and overcomes the disadvantage that three arresters cannot protect phase to phase overvoltage.
Combined structure, small shape and light weight, flexible installation, greatly use and reduce the use of space; Especially suitable for installation in the switchgear
The silicone rubber jacket is molded in one time as a whole, with good sealing, anti pollution, anti explosion, moisture-proof performance, high dielectric strength, electrical corrosion resistance, heat resistance, cold resistance and aging resistance.
The combined arrester can be gapless type or series gap type.
□ Service conditions □ Most suitable
a. The altitude is not more than 2000 meters
b. Ambient temperature: - 40 ° C~+40 ° C
c. The maximum wind speed does not exceed 35m/s
d. Areas with seismic intensity of 7 degree and below
e. The power frequency voltage applied to the arrester for a long time shall not exceed the continuous operation voltage of the arrester
f. Power frequency; 48Hz～62Hz
Power plant auxiliary power system, electric arc furnace system, etc. in compact switch cabinet
□ Product model description
HY 5 □ □ - □/□ X □/□
| | | | | |_____ Residual voltage under rated voltage of arrester/nominal discharge current between phase and ground
| | | | |_____________ Residual voltage under rated voltage of arrester/nominal discharge current between phase and ground
| | | |____________________ Place of use:
|| | Z-power station type: protect AC electrical equipment in power plants and substations from atmospheric overvoltage and switching overvoltage
|| | D-type of protective rotating motor: overvoltage damage caused by changing the capacitor bank of rotating motor with limiting vacuum switch and oil less switch
|| | R-protection shunt compensation capacitor type: limit overvoltage damage caused by operating capacitor bank of vacuum switch and oil less switch
| | |________________________ Structural features: W represents no gap; C is the series clearance
| |___________________________ Nominal discharge current
|_______________________________ Composite sheathed metal oxide arrester (old model HY)
□ Product model description
1. During transportation, storage, unpacking and installation, strong collision is not allowed; Check whether the appearance is intact before use.
2. Before putting into operation, measure DC.U1mA, its value shall not be less than the value specified by the manufacturer, and measure the leakage current IX, IX ≤ 50 at 75% μ A； After putting into operation, measure DC.U1mA regularly (5 years), and the change rate shall not be greater than ± 5% compared with the initial value;
3. No need for special maintenance and cleaning
