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6296 Donnelly Plaza
Ratkeville, Bahamas.
Prefabricated Substation
YB and ZGS station arrangements bring medium-voltage switching, a transformer and low-voltage distribution into a project-defined package. Compare their equipment grouping and site interfaces before setting the final configuration.
Prefabricated substations
YB and ZGS station series
Compare the sectionalized YB arrangement with the compact ZGS combined assembly. Open a product to review its configuration information and the project details needed for selection.
Station products
YB / PREFABRICATED
YB Series Prefabricated Substation
Factory-assembled enclosure grouping high-voltage switchgear, a distribution transformer and low-voltage distribution. Review compartment access and circuit interfaces with the station drawing.
ZGS / COMBINED
ZGS Series Combined Substation
Compact assembly combining the transformer with high- and low-voltage equipment. Confirm the switching, protection and service interfaces within the available footprint.
Station details
Product details
Product overview
The YB series groups high-voltage switchgear, a distribution transformer and low-voltage distribution in a prefabricated enclosure. YB-12 uses a factory-assembled station arrangement; equipment grouping, cable entries and access are set by the project scheme.
Exterior configuration
Enclosure 1 of 4
YB enclosure options include closed panels, access doors and ventilated designs.
Exterior configurations4 examples
YB enclosure configurations
High-voltage switchgear1 example
High-voltage switchgear compartments and operating interfaces.
Configuration information
The series range and the 10/0.4 kV reference configuration are separate. Confirm the voltage pair, transformer capacity and enclosure protection for the selected unit.
Scroll sideways to see all values.
| Item | Value |
|---|---|
| Station assembly | High-voltage switchgear, distribution transformer and low-voltage distribution |
| Series HV voltages | 6 / 10 / 12 / 24 / 35 kV |
| Series LV voltages | 0.4 / 0.69 kV |
| Series overview capacity | 50–2500 kVA |
| 10/0.4 kV reference configuration | 50–1600 kVA, 50 Hz |
| Enclosure protection | Specify for the selected arrangement and site conditions |
Define the station boundary
- Provide the incoming and outgoing circuit schedule with switching and protection functions.
- Confirm transformer type, voltage ratio and capacity for the chosen YB configuration.
- Mark cable entry, earthing, doors, ventilation and foundation on the general arrangement.
- Agree the supplied equipment and site works before ordering.
Product overview
The ZGS series places the transformer and high- and low-voltage apparatus in a compact combined station. Its footprint and access faces need to be checked against the circuit schedule and site layout.
Photo 1 of 5
ZGS front access and rear enclosure panels.
ZGS electrical ratings
Match transformer duty, cable terminations and maintenance access to the ZGS arrangement.
Scroll sideways to see all values.
| Item | Value |
|---|---|
| HV/LV rated voltage | 10/0.4 kV |
| HV maximum operating voltage | 12 kV |
| Capacity range | 50–1600 kVA |
| Rated frequency | 50 Hz |
| Enclosure protection | IP43 |
Define the station boundary
- Confirm incoming supply and outgoing circuits with switching and protection functions.
- Check transformer duty, cable terminations and earthing against the single-line diagram.
- Allow for enclosure access, lifting, foundation and maintenance clearance.
- Identify the supplied equipment and site works in the project documents.
Station construction
YB and ZGS station arrangements
Both series combine medium-voltage, transformer and low-voltage duties. Compare their physical grouping, access and site interfaces before specifying the station.
Station type 01 / 02
YB prefabricated substation
A factory-assembled enclosure for high-voltage switchgear, a distribution transformer and low-voltage distribution.
- Equipment grouping
- Define the MV, transformer and LV areas against the circuit schedule and the selected enclosure drawing. Door and cable positions follow that arrangement.
- Site context
- For urban and residential distribution, industrial sites and temporary supply. Specify the load duty, environment and access for the site.
Station type 02 / 02
ZGS combined substation
A compact combined station that integrates the transformer with high- and low-voltage apparatus.
- Equipment grouping
- The transformer and HV/LV equipment share a tighter assembly than the YB enclosure. Confirm switching, protection, cable termination and maintenance access on the proposed drawing.
- Site context
- For outdoor distribution points, urban networks and industrial facilities. Match the footprint, access faces and service clearances to the site.
Specification process
Specify a complete station for your project
Start with the circuit scheme and station boundary, then review construction, site drawings and required documents.
From project brief to station proposal
- 01
Set the electrical boundary
List incoming and outgoing circuits, switching, protection and metering duties on the single-line diagram.
- 02
Choose the station form
Compare the YB enclosure and ZGS combined arrangement against access, footprint and circuit needs.
- 03
Check equipment and site interfaces
Match transformer duty, MV/LV equipment, cables, earthing, foundation and service access to the layout.
- 04
Confirm documents and scope
Review the data sheet, general arrangement, required test records and division of factory and site work.
A defined electrical scheme and supply boundary make the proposed station easier to assess.
Arrangement comparison
Compare YB and ZGS station arrangements
Both series need a defined electrical scope. Compare their equipment grouping and access against the site drawing; confirm ratings for the chosen configuration.
| Review point | YB prefabricated station | ZGS combined station |
|---|---|---|
| Equipment grouping | High-voltage switchgear, transformer and low-voltage distribution are grouped in a prefabricated enclosure. | Transformer and HV/LV apparatus form a more compact combined assembly. |
| Electrical scheme | Define MV and LV functional units from the incoming and outgoing circuit schedule. | Check that the required switching, protection and outgoing circuits fit the combined layout. |
| Service access | Review access to each equipment area, doors and required working clearances. | Review access faces, isolation procedure and maintenance space around the compact unit. |
| Site interface | Coordinate enclosure position, cable entries, foundation and ventilation. | Coordinate footprint, cable terminations, lifting and foundation. |
| Configuration drawings | Review equipment schedule, compartment access and cable positions on the enclosure drawing. | Review the combined assembly, terminations and maintenance faces on its general arrangement. |
Quotation information
Information for a station quotation
Describe the electrical scheme, equipment scope and site conditions together. Mark values already fixed by the project and any decisions still open.
Useful project files
A single-line diagram, load schedule, equipment list and site plan help define the station. Include the latest available drawings, even if some details are pending.
Application context
Station applications
Review the electrical and site interfaces that change between local networks, industrial loads and remote supply points.
Urban or residential distribution
A prefabricated station can group MV supply, transformer and LV feeders for a local distribution point.
Design considerations
Confirm feeder number, network voltage, load growth, public-site access and the enclosure footprint before choosing the station form.
Industrial or commercial facility
The station must fit the incoming supply and outgoing process or building loads.
Design considerations
Use the protection scheme and load schedule to set equipment functions; then review cable routes, ventilation and maintenance access.
Temporary or remote supply point
A site with limited infrastructure still needs a complete electrical and installation boundary.
Design considerations
Check transport, lifting, foundation, earthing and outdoor exposure alongside the circuit and load requirements.
Specification questions
Questions before specifying a station
Answers to common questions about station scope, YB and ZGS selection, drawings and site work.
What belongs in a complete prefabricated substation?
Define the MV switching and protection, transformer, LV distribution and enclosure together. The single-line diagram and equipment schedule should show cable, earthing and site interfaces as well as the supply boundary.
How do YB and ZGS station forms differ?
The YB series groups high-voltage switchgear, a transformer and low-voltage distribution in a prefabricated enclosure. The ZGS series uses a tighter combined assembly. Compare the required circuits, access, terminations and footprint on the proposed drawings.
Can the station be selected by transformer kVA alone?
No. Voltage pair, circuit count, switching, protection, metering and enclosure conditions determine the complete station. Check the transformer duty within that electrical scheme.
Which YB capacity and enclosure rating should I use?
The YB series range and the 10/0.4 kV reference configuration have different capacity limits. Confirm the voltage pair, capacity and enclosure protection in the data sheet for the unit proposed to your project.
What documents help prepare a quotation?
Share the single-line diagram, load schedule, equipment list and site layout. State any required general arrangement, test records and project standards, and mark which values are still open.
Which work remains on site after delivery?
That depends on the supply boundary. Assign foundation, lifting, MV/LV cables, earthing and commissioning responsibilities in the project documents; factory assembly does not remove every site task.