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Discussion History

HV Roof Equipment

Assembly

High-voltage switchgear linking the pantograph to the transformer primary, with protection against overvoltage and faults. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

HV Roof Equipment parts and their functions

5 top-level parts · 5 parts in total · full bill of materials below
HV Roof Equipment parts diagram: 1 main vacuum circuit breaker, 2 surge arrester, 3 HV roof busbar, 4 primary current transformer, 5 earthing switch. 5 parts in 5 top-level items.
HV Roof Equipment parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.
#PartQtyWhat it does
1 Main Vacuum Circuit Breaker 1× Single-pole vacuum breaker interrupting up to 2 kA at 25 kV under fault conditions.
2 Surge Arrester 1× Metal-oxide arrester clamping lightning and switching transients on the roof line.
3 HV Roof Busbar 1× Insulated copper busbar routing 25 kV from breaker to the roof bushing.
4 Primary Current Transformer 1× Toroidal current transformer measuring line current for protection and metering.
5 Earthing Switch 1× Manual roof earthing switch grounding the line for maintenance access.

3D model

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Build & assembly graph

expand / collapse · shared sub-assemblies converge · links to related products · est. labour
product / assembly shared across products atomic part related product

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Bill of materials for HV Roof Equipment

5 top-level lines · 5 rows shown · 5 parts total · indented to 3 levels
# Item / sub-assembly Part no. Qty/assy Ext. qty Parts Type
1 Main Vacuum Circuit Breaker passenger-locomotive-vacuum-breaker 1× 1 · part
2 Surge Arrester passenger-locomotive-surge-arrester 1× 1 · part
3 HV Roof Busbar passenger-locomotive-hv-busbar 1× 1 · part
4 Primary Current Transformer passenger-locomotive-roof-ct 1× 1 · part
5 Earthing Switch passenger-locomotive-earthing-switch 1× 1 · part

Where the HV roof equipment is used

1 product across 1 domain contain it, directly or inside a sub-assembly

Used in 1 assembly

Passenger Locomotive

Sourcing: possible vendors

Browse the supplier directory → Prices, MOQ, and lead times are algorithmic estimates, not quotes, and not claims about these companies. Company mappings are curated by keyword; est. price band $0.50–$100. How estimates work
VendorHQSpecialtyMOQLead time
🇨🇳Foxconn
foxconn.com ↗ 		Shenzhen, CN Electronics contract mfg 1,000 pcs 6–10 wks
🇸🇬Flex (Singapore)
flex.com ↗ 		Singapore Electronics contract mfg 1,000 pcs 6–10 wks
🇮🇳Dixon Technologies
dixoninfo.com ↗ 		Noida, IN Electronics contract mfg 1,000 pcs 6–10 wks
🇨🇳BYD Electronics
bydelectronic.com ↗ 		Shenzhen, CN Electronics contract mfg 1,000 pcs 6–10 wks
🇸🇬Venture Corp
venture.com.sg ↗ 		Singapore Electronics contract mfg 1,000 pcs 6–10 wks