Package unit substation
Package unit substation is all factory-assembled and tested. They are designed and manufactured in order to satisfy the customer’s specific requirements.
There design engenders a high level of flexibility that covers a wide range of applications.
The package substation is a combination of the Ring Main unit, The Transformer and The Low-Voltage panel.
A unit substation is a combination of a Transformer and a Low-Voltage panel. These substations are used for effective electrical power distribution in medium voltage to low voltage distribution systems.
integrating SF6 insulated Ring main units with various configurations’
integrating oil or dry type Transformers
integrating metering and protection
And can ensure:
High operation reliability
Operating personnel safety
That they are suitable for building, infrastructure and industry.
All interconnecting equipment between medium voltage, transformers and low voltage are factory tested.
A wide variety of transformers from 315kVA to 2500KVA.
Transformers may be specified as oil-fitted or dry-type for mining applications.
High Voltages range from 3.3kV to 33kV.
Low voltage side range from 0.11kV up to 0.48kV.
refer to more details: https://www.cnrockwill.com/article/33kv-unitized-compact-substation.html