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On-Load Tap Changer

Assembly

OLTC regulating the ratio between the two transmission levels under load. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

On-Load Tap Changer parts and their functions

7 top-level parts · 41 parts in total · full bill of materials below
On-Load Tap Changer parts diagram: 1 diverter switch, 2 tap selector, 3 OLTC motor drive unit, 4 transition resistor, 5 OLTC oil compartment, 6 helical gear pair, 7 tap position counter. 41 parts in 7 top-level items.
On-Load Tap Changer parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.
#PartQtyWhat it does
1 Diverter Switch 1× Diverter switch breaking and making load current
2 Tap Selector 1× Tap selector pre-selecting the next tap
3 OLTC Motor Drive Unit 4 parts 1× Motor drive advancing the mechanism
4 Transition Resistor 4× Transition resistors
5 OLTC Oil Compartment 1× Isolated switching-oil compartment
6 Helical Gear Pair 1× Drive-train gearing
7 Tap Position Counter 1× Operation counter and position indicator

3D model

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Build & assembly graph

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Bill of materials for On-Load Tap Changer

7 top-level lines · 15 rows shown · 41 parts total · indented to 3 levels
# Item / sub-assembly Part no. Qty/assy Ext. qty Parts Type
1 Diverter Switch autotransformer-oltc-diverter 1× 1 · part
2 Tap Selector autotransformer-oltc-selector 1× 1 · part
3 OLTC Motor Drive Unit 4 parts autotransformer-oltc-motor-drive 1× 1 32 assembly
3.1 Servo Motor 4 parts servo-motor 1× 1 24 assembly
3.1.1 Stator Assembly 3 parts + deeper › stator-assembly 1× 1 3 assembly
3.1.2 Rotor Assembly 4 parts + deeper › rotor-assembly 1× 1 19 assembly
3.1.3 Encoder encoder 1× 1 · part
3.1.4 Motor Housing motor-housing 1× 1 · part
3.2 Drive Cam Shaft autotransformer-oltc-cam 1× 1 · part
3.3 Relay relay 6× 6 · part
3.4 Manual Operating Crank autotransformer-oltc-hand-crank 1× 1 · part
4 Transition Resistor autotransformer-oltc-transition-resistor 4× 4 · part
5 OLTC Oil Compartment autotransformer-oltc-oil-compartment 1× 1 · part
6 Helical Gear Pair gear-pair 1× 1 · part
7 Tap Position Counter autotransformer-oltc-counter 1× 1 · part

Where the on-load tap changer is used

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

Used in 1 assembly

Autotransformer

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