|
[China]
Trade Verify
Contact name:Sherlin
GuangDong Heng AnShun Electrical Power Equipment Service Co., Ltd. |
|
Verified Suppliers
|
|
|
High Voltage Overhead Electrical Isolator Single Phase Matching with Outdoor Boundary Load Switch
Product Description:
High voltage electrical isolator is a type of electrical insulator
used in overhead power transmission and distribution systems. It is
designed to provide electrical insulation between the power lines
and their supporting structures, and to support the weight of the
power lines.
It is typically made of specialized materials such as
porcelain or polymer, which are highly resistant to electrical
arcing and corrosion. They are designed to withstand high levels of
voltage and electrical current, and are typically used in
applications where reliability and safety are critical.
High voltage electrical isolators are commonly used in power transmission and distribution systems, where they provide a means of supporting and isolating high voltage power lines and equipment. They are designed to withstand high levels of voltage and electrical current, and are typically used in applications where reliability and safety are critical.
And it is available in a range of shapes and sizes, and may be designed with specialized features to improve their performance and safety. These may include insulating barriers, arc chutes, and earth switches, among others.
Application:
1 Substation isolation: In a substation, high voltage disconnector switches are used to
disconnect transformers, circuit breakers, and other equipment from
the power system for maintenance or repair.
2 Transmission line isolation: High voltage disconnector switches are used to isolate sections of
a high voltage transmission line for maintenance, repair, or to
prevent power flow during emergencies.
3 Capacitor bank switching: In power systems with capacitor banks, high voltage disconnector
switches are used to disconnect the capacitor bank from the power
system for maintenance or repair.
4 Load shedding: In case of an overload or other emergency situation, high voltage disconnector switches can be used to shed load by
disconnecting certain sections of the power system.
5 Fault isolation: High voltage disconnector switches are used to isolate faulted
sections of the power system to prevent damage to equipment and
ensure continuity of power supply.
Insulating Body: The insulating body is the main component of the isolator, and is
typically made of porcelain or polymer. It is designed to provide
electrical insulation between the power line and supporting
structure, and may be shaped in a variety of ways depending on the
specific application.
Metal End Fittings: The metal end fittings are attached to the insulating body and
provide a means of connecting the isolator to the power line and
supporting structure. They are typically made of galvanized steel
or other corrosion-resistant material, and may be designed with
special features such as clevises or ball-and-socket joints for
easy installation.
Arc Chutes: Many overhead electrical isolators are designed with arc chutes,
which help to dissipate the heat generated by electrical arcing and
prevent damage to the isolator.
Earth Switch: Some overhead electrical isolators are equipped with an earth
switch, which provides an additional level of safety by grounding
the power line in the event of a fault or overload.
Fitting Caps: Fitting caps are used to protect the metal end fittings from
corrosion and damage, and may be made of plastic or other
materials.
Safety Risks:
1Electrical shock: High voltage disconnect switches can deliver a potentially lethal
electric shock if they are not handled properly. This can happen if
the switch is not properly isolated before it is opened or if there
is a fault in the equipment.
2Arc flash: When high voltage disconnect switches are opened, an arc flash can
occur, which can release a significant amount of energy in the form
of heat, light, and pressure. This can cause burns, eye damage, and
other injuries.
3Equipment failure: High voltage disconnect switches can fail if they are not properly
maintained or if they are overloaded. This can lead to equipment
damage, electrical fires, and other hazards.
4Environmental hazards: High voltage disconnect switches are often located in outdoor
environments, where they can be exposed to extreme weather
conditions, such as high winds, heavy rain, and lightning strikes.
These conditions can create additional safety risks for personnel
who are operating or maintaining the equipment.
P.S.
To minimize the risks associated with high voltage disconnect
switches, it is important to follow proper safety procedures,
including using appropriate personal protective equipment,
following lockout and tagout procedures, and ensuring that only
qualified and trained personnel are allowed to operate and maintain
the equipment. Regular maintenance and testing of the equipment can
also help to reduce the risk of equipment failure and other
hazards.
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 | ||||||||||||
