Prefabricated Substation
A factory-assembled complete substation integrating transformer, switchgear, and protection for rapid installation.
A prefabricated substation (box-type substation) is a complete MV-LV unit, factory-assembled and tested. Includes transformer, switchgear, protection, metering, interconnections.
Advantages: days vs. weeks installation, lower civil costs, factory QA, compact. Used in urban, renewable, industrial applications.
Types: European (IEC 61336), American pad-mounted, container-type. See new energy guide for renewable applications.
QDTB manufactures from 100 kVA to 2,500 kVA, fully factory tested for rapid deployment.
Related Terms
Distribution Transformer
A transformer stepping down voltage from the distribution network (11-33 kV) to utilization voltage (400/230V) for end consumers.
Box-Type Substation (Prefabricated)
A factory-assembled compact substation integrating transformer, HV/LV switchgear, and protection in a weatherproof enclosure.
Switchgear
Equipment for switching, controlling, and protecting electrical circuits including breakers and relays.
More Terms Starting with “P”
Power Transformer
A large transformer (>10 MVA) used in transmission networks for stepping voltage between system levels.
Power Factor
The ratio of real power (kW) to apparent power (kVA) indicating how effectively electrical power is utilized.
Partial Discharge (PD)
Localized electrical discharges in small insulation regions not bridging electrodes, indicating defects or aging.
Phasor Diagram
A graphical representation of AC voltage and current relationships in a transformer showing magnitude and phase angle.
More in “Transformer Types”
Autotransformer
A transformer with a single winding acting as both primary and secondary, providing voltage conversion through electromagnetic induction and direct electrical connection.
Amorphous Alloy Transformer
A distribution transformer using amorphous metal core material achieving 60-70% lower no-load losses than conventional silicon steel cores.
Box-Type Substation (Prefabricated)
A factory-assembled compact substation integrating transformer, HV/LV switchgear, and protection in a weatherproof enclosure.
Need help with transformer selection?
QDTB engineers can help you choose the right equipment based on your specific requirements