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Discussion History

Protection Relays and Monitoring

Assembly

Gas, temperature and pressure protection plus instrument relays guarding both active parts. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

Protection Relays and Monitoring parts and their functions

7 top-level parts · 15 parts in total · full bill of materials below
Protection Relays and Monitoring parts diagram: 1 buchholz relay, 2 OLTC oil-surge relay, 3 winding temperature indicator, 4 oil temperature indicator, 5 pressure sensor, 6 relay, 7 dissolved-gas monitor. 15 parts in 7 top-level items.
Protection Relays and Monitoring parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.
#PartQtyWhat it does
1 Buchholz Relay 1× Buchholz gas and oil-surge relay on the conservator pipe
2 OLTC Oil-Surge Relay 1× Oil-surge relay protecting the OLTC compartment
3 Winding Temperature Indicator 2× Winding temperature indicators with alarm and trip contacts
4 Oil Temperature Indicator 1× Oil temperature indicator for top-oil temperature
5 Pressure Sensor 3× Sudden-pressure and oil-pressure sensors
6 Relay 6× Differential, overcurrent and trip relays
7 Dissolved-Gas Monitor 1× Dissolved-gas analysis monitor on the main tank

3D model

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Build & assembly graph

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Bill of materials for Protection Relays and Monitoring

7 top-level lines · 7 rows shown · 15 parts total · indented to 3 levels
# Item / sub-assembly Part no. Qty/assy Ext. qty Parts Type
1 Buchholz Relay phase-shifting-transformer-buchholz 1× 1 · part
2 OLTC Oil-Surge Relay phase-shifting-transformer-oltc-protection-relay 1× 1 · part
3 Winding Temperature Indicator phase-shifting-transformer-wti 2× 2 · part
4 Oil Temperature Indicator phase-shifting-transformer-oti 1× 1 · part
5 Pressure Sensor pressure-sensor 3× 3 · part
6 Relay relay 6× 6 · part
7 Dissolved-Gas Monitor phase-shifting-transformer-gas-monitor 1× 1 · part

Where the protection relays and monitoring is used

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

Used in 1 assembly

Phase-Shifting Transformer

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 $3–$400. How estimates work
VendorHQSpecialtyMOQLead time
🇨🇳BOE
boe.com ↗ 		Beijing, CN Display panels 1,000 pcs 6–10 wks
🇨🇳Tianma
tianma.com ↗ 		Shenzhen, CN Display panels 1,000 pcs 6–10 wks
🇨🇳TCL CSOT
szcsot.com ↗ 		Shenzhen, CN Display panels 1,000 pcs 6–10 wks
🇨🇳Truly Opto
truly.net ↗ 		Shanwei, CN Displays & camera modules 1,000 pcs 6–10 wks
🇸🇬Venture Corp
venture.com.sg ↗ 		Singapore Electronics contract mfg 1,000 pcs 6–10 wks