What is horizontal break isolator?
The Horizontal Double Break Type Isolator –HDB has turn & twist mechanism with self wiping contacts. The fixed & moving blades are made out off hard drawn electrolytic copper. GR Power Switchgear Ltd. Manufactures Horizontal Double Break Type Isolator -HDB.
What is Double Break isolator?
Double Break Type Isolator The rotation of the middle post insulator can be done by a lever method at the bottom of the post insulator, as well as it is related to manual operation (operating handle) or motorized operation motor (using motor) of the isolator via a mechanical knot rod.
Why isolator is used?
Isolator is a manually operated mechanical switch that isolates the faulty section of substation. It is used to separate faulty section for repair from a healthy section in order to avoid the occurrance of severe faults. It is also called disconnector or disconnecting switch.
What is Centre break isolator?
prev next. The centre-break disconnector consists of two arms which, by moving in a coordinated way on a plane which is perpendicular to that of the insulators supporting them, close the circuit at a point which is located approximately mid-way.
What is pantograph isolator?
The Pantograph Disconnectors are single break and vertical reach type Disconnectors mounted on a post insulator operated through a operating rod insulator. The divided support Disconnectors are mounted directly on the structure.
Why are isolator used?
The isolator is a mechanical switch which isolates a part of the circuit from the system as when required. Isolators are used to open a circuit under no load. Its main purpose is to isolate one portion of the circuit from the other and is not intended to be opened while current is flowing in the line.
What is the main function of isolator?
An isolator is a device used for isolating a circuit or equipment from a source of power. An isolator is a mechanical switching device that, in the open position, allows for isolation of the input and output of a device.
How does a isolator work?
An isolator works with a diode system that allows one-directional flow, whereas the separator has a solenoid function that can choose to pull power from either source. While the vehicle’s engine is running, all equipment is running from the vehicle’s power.
What is the difference between isolator and disconnector?
Isolators and Disconnectors are types of simple mechanical switch. Circuit Breaker is operated Automatically and Manually. Isolator and Disconnector are operated Manually. Isolator is an OFF-Load Device i.e. Disconnector can be operated when the power supply is totally OFF.
Where is pantograph isolator used?
The application of pantograph disconnectors is especially useful for providing connection between busbars arranged at two different vertical levels. Due to their compactness, electric trains also use the pantograph design to connect the train to high voltage overhead lines.
What is MCB isolator?
Isolators are generally used in power system while on the other hand, MCB is the circuit breaker. Isolators are manually-operated device, and on the contrary, the circuit breaker is the automatically-operated device. Isolators cut the portion of the substance when a fault occurs.
What are isolators made of?
Base isolators made of layers of neoprene and steel with a low horizontal stiffness are used to lower the natural frequency of the building. Some other base isolators are designed to slide, preventing the transfer of energy from the ground to the building.
What kind of isolator is triple pole double break?
The triple pole double break with Banging & Turn Twist type isolator is center post Insulator rotating type gang operated, Manual/Motor operated and designed for outdoor application.
When to use a double break isolator in a substation?
Horizontal double break isolator in substations use is abundant. Isolators are generally used on both side of the circuit breaker, this measure is taken just to ensure extra safety and protection because in power system incoming and outgoing lines can have multiple sources of power and disconnecting one side is sometimes not enough.
What kind of switch is in an isolator?
The isolator will be a horizontal double break central rotating type with an earth switch. Isolators and earth switches can be hand operated. Earth switches and Isolators (in closed position) are designed to withstand thermal effects and other conditions due to short circuit current.
What kind of base does an isolator need?
The rotating isolator has triple pole construction and shall be suitable for Horizontal upright mounting. Each pole consist of galvanized steel base, post type insulators of reputed make, EC grade copper fixed and moving contacts.