Shield Machine Box-Type Prefabricated Substation 40.5kV

Attributes Description Documentation Resource Library

Key attributes

Brand	ROCKWILL
Model NO.	Shield Machine Box-Type Prefabricated Substation 40.5kV
Rated voltage	40.5kV
Series	YB

Description

Rockwill shield machine box-type prefabricated substations are specialized power distribution units designed for shield tunneling machine applications. The internal structure is compact with a long and narrow layout that integrates high-voltage switchgear, transformers, and low-voltage distribution equipment into a single enclosure tailored to the spatial constraints of shield machine operations. The unit offers a protection grade of IP55, meeting the demanding requirements of harsh underground environments.

Key Features

Compact Form Factor ： Long and narrow enclosure design fits the structural layout of shield tunneling machines, optimizing space utilization within the tunnel cross-section.
Underground-Grade Protection： IP55 enclosure protection ensures reliable operation in harsh underground conditions with high dust concentration and moisture exposure.
Comprehensive Protection Functions ：Integrated detection and protection systems including overcurrent, earth fault, short-circuit, and temperature monitoring ensure safe and stable operation.
Customizable Configuration：Design and ratings can be tailored to match the electrical characteristics and spatial requirements of different shield machine types and tunneling projects.

Technical Parameters

Parameter	Value
Rated voltage (HV)	40.5 kV
Rated frequency	50 / 60 Hz
Rated normal current (HV)	630 A
Rated short-time withstand current (Ith)	25 kA / 3 s
Rated peak withstand current (Idyn)	63 kA
Low voltage side rated voltage	400 / 480 V
Transformer rated capacity	Up to 3000 kVA
Power frequency withstand voltage (PF)	95 kV
Lightning impulse withstand voltage (LI)	200 kV
Enclosure protection grade	IP55

Environmental Conditions

Parameter	Value
Environment	Underground tunnels with high dust and moisture
Installation	Skid-mounted, integrated with shield machine trailing gear

Applications

Shield tunneling machine power supply
Underground tunnel construction projects
Mining and excavation operations
Temporary tunnel site power distribution

Documentation Resource Library Prefabricated Substation

Public.

Rockwill Electric Group Profile

Brochure

English

PDF

Negotiable

Pricing calculator

Model

YB-630-40.5/0.41

PDF

Rockwill Electric Group Profile

Warranty by

Whole life care manager

Whole-life care management services for equipment procurement, use, maintenance, and after-sales, ensuring safe operation of electrical equipment, continuous control, and worry-free electricity consumption.

The equipment supplier has passed platform qualification certification and technical evaluation, ensuring compliance, professionalism, and reliability from the source.