GuangDong Heng AnShun Electrical Power Equipment Service Co., Ltd.
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GW9 Series Outdoor Disconnector Switch 36kV 1000A For Substation With Easy Installation Overhead Line Disconnect Switch
Product Decription:
High voltage isolator switches are indeed used in high-voltage power transmission and distribution systems to disconnect circuits from their power sources for maintenance or repair purposes. They provide a means for isolating the circuit from the power supply, allowing workers to safely perform their tasks without the risk of electric shock.
The operation of a high voltage isolator switch involves a rotating pole that controls the opening and closing of the switch's blade or contact. By rotating the pole, the blade can be engaged or disengaged, thereby connecting or disconnecting the circuit. This mechanism allows for a manual and visible indication of the switch's status.
To ensure operator safety, the pole of the disconnector switch is typically made of a non-conductive material, such as fiberglass or composite materials, which provides insulation against the high voltage present in the system. This insulation protects the operator from electric shock when operating the switch.
High voltage isolator switches are available in various designs and sizes to accommodate different voltage and current ratings of the circuits they control. They are commonly mounted on poles or structures in outdoor settings, where they can be easily accessed and operated. In conjunction with other protective devices like circuit breakers and fuses, disconnector switches contribute to the overall safety and reliability of the electrical system by providing a means of isolation and protection.
Feature:
1.High voltage and current handling capacity: high voltage disconnect switches are designed to handle high voltages and currents commonly found in high voltage power systems, and are typically rated for 69 kV and above.
2.Stationary and movable contacts: high voltage disconnect switches have a set of stationary and movable contacts that are separated by an air gap. When the switch is closed, the contacts are in contact with each other, allowing current to flow through the circuit. When the switch is opened, the contacts are separated, interrupting the flow of current through the circuit.
3.Manual or motorized operation: high voltage disconnect switches can be manually operated or motorized, depending on the specific application and requirements. Motorized switches allow for remote operation, which can improve safety and convenience.
4.Outdoor construction: high voltage disconnect switches are designed for outdoor use and are typically constructed of durable materials such as steel or aluminum. They are built to withstand harsh environmental conditions, such as extreme temperatures, wind, rain, and dust.
5.Visual indicators: high voltage disconnect switches often have visual indicators to show the status of the switch, such as open or closed. This allows operators to quickly and easily determine the status of the switch.
6.Safety features: high voltage disconnect switches are designed with safety features to protect workers and the public from electrical hazards, such as accidental contact with live parts of the system. These features may include safety interlocks, grounding provisions, and warning labels.
Operation
1.When the High voltage isolator switch is in the closed position, the contacts of the isolator are in contact with each other, allowing current to flow through the circuit. Thet HV electrical isolator is closed by manually or remotely operating the isolator, depending on the type of the HV electrical isolator.
2.To isolate a section of the power system, the HV electrical isolator must be opened. This is typically done by manually or remotely operating the isolator to separate the contacts and interrupt the flow of current through the circuit.
3.Once the High voltage isolator switch is opened, the section of the power system that is connected to the isolator is isolated from the rest of the system. This allows maintenance or repair work to be performed safely on the isolated circuit.
4. When the maintenance or repair work is complete, the High voltage isolator switch can be closed to restore power to the isolated circuit. This is done by manually or remotely operating the isolator to connect the contacts and restore the flow of current through the circuit.
Safety Tips:
1.High Voltage Rating: High voltage isolator switches are designed to withstand high levels of voltage, typically ranging from several thousand volts to several hundred thousand volts.
2.Robust Construction: High voltage isolator switches are typically made of materials that are highly resistant to electrical arcing, corrosion, and other forms of damage, such as porcelain or polymer.
3.Arc Chutes: Many high voltage isolator switches are designed with arc chutes, which help to dissipate the heat generated by electrical arcing and prevent damage to the switch.
4.Earth Switch: Some high voltage isolator switches are equipped with an earth switch, which provides an additional level of safety by grounding the isolated section of the circuit.
5.Interlocking Mechanism: To prevent accidental closure of the switch while maintenance work is being carried out, many high voltage isolator switches are equipped with an interlocking mechanism that prevents the switch from being closed until all safety procedures have been followed.
6. Visual Indicators: High voltage isolator switches may also include visual indicators, such as lights or flags, that provide a clear indication of whether the switch is in the open or closed position.
Condition:
1.The altitude does not exceed 1000m
2.The ambient air temperature: Maximum+ 40'C ;Minimum:General Area -30'C, Paramos -40 C;
3.The wind pressure does not exceed 700Pa.(corresponding to 34m/s wind speed);
4.The earthquake intensity does not exceed 8 degrees;
5.The working situation is without frequent violent vibration;
6.The installation site of ordinary type isolator should be kept away form gas, smoke chemical deposition, salt-spray fog, dust
and other explosive and corrosive maters that affect seriously insulation and conduction capability of the isolator
7.Pollution-proof type isolator is applies to severe filthy conduction area, however, it shouldn't be any explosive matters and matters causing fire
Technical Parameters:
| Serial No. | Parameter | Unit | Data | |||||||||
| 1 | Rated Voltage | kV | 12 | |||||||||
| 2 | Rated Current | Model No. | (H)GW9-12(W)/630-20 | A | 630 | |||||||
| (H)GW9-12(W)/1000-20 | 1000 | |||||||||||
| (H)GW9-12(W)/1250-31.5 | 1250 | |||||||||||
| 3 | 4s Short-time withstanding current | Model No. | (H)GW9-12(W)/630-20 | kA | 50 | |||||||
| (H)GW9-12(W)/1000-20 | 50 | |||||||||||
| (H)GW9-12(W)/1250-31.5 | 80 | |||||||||||
| 4 | Rated Insulation Level | Lightning surge withstand voltage(peak) | Polar-to-Earth (Positive & Negative) | kV | 75 | |||||||
| Interfracture (Positive & Negative) | 85 | |||||||||||
| Industrial frequency withstand voltage (1 min) (Effective value) | Dry Test/Wet Test | Polar-to-Earth | 42(Dry) 34(Wet) | |||||||||
| Interfracture | 48(Dry) | |||||||||||
| 48(Dry) | ||||||||||||
| 48(Dry) 40(Wet) | ||||||||||||
| 5 | Main Circuit Resistance | μ Ω | 630 | |||||||||
| 1000 | ||||||||||||
| 1250 | ||||||||||||
| 6 | Mechanical Life Time | times | 50 | |||||||||
| 50 | ||||||||||||
| 80 | ||||||||||||
