Fixed AIS Medium Voltage Switchgea
Introduction to Fixed AIS Medium Voltage Switchgear
A safe and economical option for medium voltage networks
Fixed AIS Medium Voltage Switchgear (Air Insulated Switchgear – Fixed Type) is an air-insulated and modular switchgear designed for protection and control with optional automation (RTU) in indoor medium voltage power networks. These switchgears are custom-made by Iran Transfo Substations Development and can be used across a wide range of industrial, commercial, and distribution projects.
Technical Specifications and Features of Fixed AIS Switchgear
- Insulation Type: Air Insulated (AIS)
- Design Type: Fixed Type with customized layout
- Equipment: Load break switch, fuse, vacuum or SF6 circuit breaker with secondary protection relays and measurement devices
- Motorization Option: Available for all cells with load break switches and circuit breakers
- Expandable: Expandable from both sides
- Protection Degree: IP2X
- Voltage Indicator: Capacitive voltage divider with three-phase indicator
- Connections: Via cold and heat-resistant cable terminations
Main Components of Fixed AIS Switchgear
- Load break switch cell (630A-1250A / SF6) with 25kA breaking capacity
- Fused load break switch cell with Coil Shunt Trip
- Motorized vacuum or SF6 circuit breaker cell with current transformer and secondary relay
- Mechanical interlock system for open, close, and earth operations
- Earth Fault Indicator
- Metering Cell
Applications of Fixed AIS Medium Voltage Switchgear
- Substations in industrial and commercial centers
- Urban electricity distribution projects
- Factories and internal facilities
- Building substations
Advantages of Fixed AIS Switchgear
- Low Cost: Simple design with fixed equipment
- Full Operator Safety: Standard interlock in all conditions
- Custom Design: Tailored to client requirements
- Expandable: Modular design, extendable from both sides
- Distribution Network Compatibility: Compliant with Tavanir requirements and international standards
FAQ
- What is Fixed AIS Medium Voltage Switchgear?
- A type of medium voltage switchgear (up to 36kV) with air insulation, equipped with switches (load break switch and circuit breakers).
- What are the advantages of Fixed design compared to Withdrawable type?
- Simpler structure, smaller dimensions, and lower cost.
- Where is this switchgear used?
- Used in substations, distribution networks, power plants, and various industrial applications.
- Can these switchgears be motorized?
- Yes, all disconnectors and circuit breakers can be equipped with motors.
- Is this switchgear expandable?
- Yes, its modular design allows expansion from both sides.