The Compact Sub Station (CSS) also known as Packaged Sub Station (PSS).
The Compact Sub Station (CSS) is a compact enclosure consisting of MV switchgear, a transformer, LV switchboard along with interconnections and auxiliary equipment to transform energy from medium to low voltage system located in three separate compartments which are segregated from each other by means of partitions in order to ensure personnel safety. Accessibility to operate or maintain the equipment is through lockable doors provided for each compartment to maximise security. Assembly of the complete substation is factory ready to minimise site installation time and cost. All equipment is of high quality and tested as a complete unit.
Medium Voltage Switchgear
The MV Switchgear compartment is Equiped with Compact Ring Main Unit (RMU) &Vaccum Circuit Breaker (VCB).
Transformer
The dry and oil type transformer can be installed inside the transformer compartment, the transformer rating for the oil type transformer is up to 2500 KVA. The transformer compartment design provide smooth air flow and natural cooling in order to meet the temperature rise requirement as per standard.
LV Switchboard
The LV Switchboard compartment contains Low Voltage distribution board which is fed from the secondary side of transformer. The LV Switchboard can be designed as per customer. Different types of switching devices, Breaker (ACB or MCCB) or fuse switches can be accommodate inside the Panel.
Features
High level of safety for equipment and personnel
Can be lifted with the transformer installed
No access to live parts
Access to the MV & LV compartment provided through a double door arrangement.
Engineered footprint to meet the required clearance standards
Range We Offer
| Capacity | 100 KVA to 2500 KVA |
| Voltage Class | 11kV, 22kV & 33kV (Any Special Customised Class as per requirement) |
| Low Voltage | 380 V, 400 V, 415 V, 433 V & 440 V (Any Special Customised Class as per requirement) |
| Cooling | AN, ONAN |
| Tap Changer | OCTC, OLTC |
Efficient Outdoor Power SolutionThe Compact Sub Station (CSS) is expertly engineered for outdoor power distribution, featuring a hermetically sealed, oil-filled transformer. Its weatherproof, dustproof IP54 enclosure and ONAN cooling system ensure reliable operation in harsh environments. With service life extending over 25 years, this solution is tailored for both industrial and commercial installations.
Plug & Play InstallationDesigned for convenience, the CSS is fully skid-mounted and comes factory-assembled, enabling straightforward plug-and-play installation. All major components-including HV/LV switchgear and circuit breakers-are integrated for immediate deployment, reducing both site work and installation time significantly.
Comprehensive Protection and MonitoringSafety and operational monitoring are at the core of CSS design. The enclosure includes advanced surge arresters, dual earthing provisions, and high-grade insulation conforming to IS 1180/IEC 61330 standards. Additionally, the CSS offers remote monitoring and is ready for SCADA integration, ensuring consistent system oversight and swift response to any anomalies.
FAQ's of Compact Sub Station (CSS):
Q: How is the Compact Sub Station (CSS) installed at the site?
A: The CSS is manufactured as a skid-mounted, ready-to-install unit, enabling plug-and-play deployment. Once delivered to the site, it simply needs to be positioned, earthed using the dual earth terminals provided, and connected to power via its pre-assembled terminals.
Q: What protection features ensure the reliability and safety of the CSS during operation?
A: The CSS is equipped with an IP54-rated weatherproof and dustproof enclosure, dual earthing provisions, flame retardant PVC internal wiring, surge arresters for transient protection, and both SF6 and VCB circuit breakers. Insulation is provided as per Class A/B/F requirements for enhanced safety.
Q: When is the CSS suitable for use, and what typical environments does it support?
A: Designed for outdoor applications, the CSS is ideal for industrial parks, commercial complexes, substations, or any area requiring reliable, weather-resistant power distribution in India or international markets. It operates efficiently in ambient temperatures ranging from -20C to +50C.
Q: Where can remote monitoring and SCADA integration be implemented on the CSS?
A: The CSS is constructed with dedicated provisions for remote monitoring tools and SCADA integration. These features can be tailored to customer requirements at the time of installation, allowing seamless integration with existing remote control and monitoring systems.
Q: What is the process for maintenance, and how long is the service life?
A: Thanks to its hermetically sealed, oil-filled transformer and enclosed design, routine maintenance is minimal. The service life exceeds 25 years under recommended operating and maintenance conditions as per IS 1180 and IEC 61330 standards.
Q: How does the CSS benefit power distribution applications?
A: With high efficiency up to 99%, overload capability of 150% for two hours, and instant plug-and-play installation, the CSS enhances operational efficiency, reduces downtime, and meets stringent environmental and safety standards. Its robust design ensures reliable performance over decades of service.
