Switchgears

Salient Features :

• Free standing or Transformer mounted
• Indoor and outdoor use
• Built-in Earthing Switches for ring cables and Transformer
• Built-in cable testing facility
• High degree of operator safety
• Full Protection from external environment
• Single operating handle for all Switches
• Reduced maintenance
• Extensible and non extensible

Control and Relay Panels for systems up to 400 kV are designed, manufactured and supplied to suit requirements of each specification.

Construction types include:

• Standard 600/800/1200 width panels
• Relay Panels with transparent doors
• Duplex Panels with walkway
• Panels in 'L' and 'U' formation

RANGE OF CONTROL PANELS SUPPLIED

• Local Control Panels for Switchgear up to 400kV
• Remote Control Panels for Switchgear up to 400kV
• Control & Relay Panels for Switchgear up to 36kV
• Relay Panels for 132kV Switchgear
• Remote Tap changer Control Panels
• Control and Relay Panels for Shunt Reactors
• Pilot Marshalling Cabinets
• Telemetry Terminal Transfer Cabinets
• Annunciator Panels
• Synchronizing Panels
• Interposing Relay Panels

Used in residential / industrial installations. Distribution Boards are directly mounted on transformer, totally enclosed, sheet steel fabricated construction and consists of:

• Incoming Isolator/ACB
• Outgoing MCCB's or Fuses
• Instrument panel with Voltmeter, selector switches, Ammeters and Service fuses

• Distribution Transformers are meant for Secondary distribution of power at customer's end.
• Al-Ahleia manufactures distribution transformers ranging from 50KVA to 2500KVA with Cable Box on HV and LV side meant for connecting in secondary distribution network.
• Al-Ahleia can also manufacture pole mounted transformers with HV & LV bare bushings. Such type of transformers supplied by us are operating for giving power to oil well supply at Joint operations.

• Al-Ahleia is manufacturing Power Transformers ranging from 2500KVA to 50,000KVA,132KV class.
• These transformers are meant to be used in primary distribution network.The power is received from high voltage network and step-down to lower voltage useful at customer's end or useful for secondary distribution.

• Al-Ahleia manufactures hermetically sealed transformers which are totally sealed from outside air. In smaller transformers, Dry air cushion is used to take up expansion space needed due to variation in oil level because of temperature.
• In larger transformers a rubber bag is used in the conservator which takes up expansion/contraction of oil and thus isolate the transformer oil from outside atmosphere.
• Ratings as per Customers requirement.

• Earthing Transformers are zig-zag transformers.They are special purpose transformers.
• It has primary winding but no secondary winding or sometimes an auxiliary winding is given for lighting loads.
• Application of these transformers is derived for earth reference point for ungrounded electrical system.
• This is also used for control of harmonic current.
• Al-Ahleia can supply earthing transformers with short-time current rating of 10 seconds and 30 seconds and with auxiliary winding. However, customer has to specify the short-time current rating and zero phase sequence impedance.

• Regulating Transformers are used to give large variable range of output voltage keeping input voltage constant or give constant output voltage from variable input voltage.
• Ratings as per Customers requirement.

• Al-Ahleia can supply Auto Transformers which has only one winding and the input and output are taken from same winding. Such type of arrangement reduces cost of transformer as one winding is common between primary and secondary windings.
• Ratings as per Customers requirement.

• Al-Ahleia can manufacture converter transformers for use with thyrister converter used in motor control centres or in any variable speed drives.
• In larger transformers a rubber bag is used in the conservator which takes up expansion/contraction of oil and thus isolate the transformer oil from outside atmosphere.
• Ratings as per Customers requirement.

• Al-Ahleia can manufacture transformers suiting to arc furnace duty or induction furnace duty.
• Customer has to specify incoming voltage and the various outgoing voltages required with KVA ratings of tapping i.e. where constant KVA required or variable KVA rating required.

• Distribution Transformers (Stand alone)
• Transformers for Unit Distribution Substation

1. Weather proof metal housing.
2. Ring Main Unit up to 15 kV
3. Oil filled Transformer up to 1600kVA.
4. Low Voltage cabinets.

1. Weather proof metal housing.
2. Ring Main Unit up to 15 kV
3. Cast resin Transformer up to 1600kVA.
4. Low Voltage cabinets.

• Steel structured construction with external galvanized cladding envelope.
• Multi-storeyed housing construction.
• Smooth Internal finish, easily maintainable walls and ceiling.
• Floor plates 6 mm thick with suitable openings for cable entry.
• Internally partitioned to form separate rooms.
• Thermally insulated envelope exceeding normally applied standards using Rock Wool up to 100mm thick.
• Rugged strong steel doors single/double with high performance seals, break resistant hinges, fire or blast rated as per requirements.
• Removable Lifting lugs at suitable location.
• Polyurethane Paint finish on galvanized cladding for maximum corrosive protection.
• Base frame plates for attachment to foundations or under structure.
• Roof Platform with ladders for access to HVAC and ventilation systems on Roof.
• Fire and Blast Resilient rated as per requirement.
• Air conditioning and ventilation system with total redundancy as per requirement.
• Fire detection, alarm and automatic fire extinguisher system with 100% reserve as per requirement.
• Internal and external lighting.
• Raised floor facilities, if applicable.
• Furniture, fitting and floor coverings as required.

• HV Switchgear
• LV Switchgear
• Motor Control Centers
• Oil/Cast resin Transformer
• DC System with Batteries and Charger
• Internal Cabling System
• Marshalling and Annunciator Panels
• Data acquisition System
• HV/LV Bus ducts
• Air Conditioning
• Fire fighting/Fire Alarm control

1. Substation / equipment / process to be monitored and controlled.
2. Network of devices (IEDs, SCADA master / HMI, RTU, etc) that interfaces with substation / equipment / process.

• Display of real time data of all substation parameters acquired from protection relays, measurement centers and other intelligent electronic devices (IEDs).
• Animated Graphical User Interface (GUI).
• Communication with IED's through standard protocols like MODBUS, DNP, and IEC 61850 etc.
• Secure Control of switching device.
• Display of real time and historical alarms, events and trends.
• Report generation.
• Waveform capturing and recording of alarms, disturbance and fault conditions.