TS310SO4B

Aircraft transformer TS310SO4B

TS310SO4B is an aircraft three-phase step-down power transformer used in onboard AC electrical systems. It supplies low-voltage three-phase power for aircraft instruments and equipment circuits that require 36 V at aviation frequency. In Russian technical documentation the product is normally written as ТС310СО4Б, with the letter "О" in the group "СО4Б". The spelling ТС310С04Б with zero also appears in some documents, catalogs and stock records, so both markings should be checked during identification.

Power supply function of TS310SO4B

The transformer receives three-phase AC power from the aircraft electrical system and steps it down to 36 V for connected instrument consumers. It does not generate power and does not perform electronic regulation. Its function is voltage transformation inside the aircraft AC power supply chain. If instruments lose 36 V power, the cause may be the transformer itself, the generator channel, wiring, protection devices, automatic transfer circuit or the connected load.

TS310SO4B in aircraft instrument circuits

TS310SO4B is used for powering aircraft monitoring and navigation equipment, including circuits related to engine indication, hydraulic system indication and other onboard instruments. On Mi-8 / Mi-17 family helicopters, this transformer is associated with the three-phase 36 V, 400 Hz instrument power system. It is also referenced for aircraft such as Yak-38 and Yak-42. The exact installation depends on the airframe version and the electrical system configuration.

Installation and backup supply for TS310SO4B

In Mi-8 type installations, the transformer may be installed on the cockpit electrical equipment rack and normally receives power from the main AC generator channel. If the main channel is unavailable, aircraft automation may switch the supply to a standby channel. In emergency configurations, converters such as PTS-800BM or PT-200Ts may be involved in feeding essential AC consumers from the DC system. The actual circuit should always be checked against the aircraft wiring diagram.

Identification and ordering of TS310SO4B

Before ordering, the transformer marking should be compared with the aircraft parts catalog, electrical system manual and the nameplate on the installed unit. Because both spellings are found in practice, requests should include all known markings when possible. For correct selection, provide the aircraft type, installation location, required voltage values, and a photo of the data plate. The product is also known under alternative designations TS310SO4B, TS310S04B, ТС310СО4Б and ТС310С04Б.

Product Type: Aircraft three-phase step-down power transformer
Function: Step-down conversion of three-phase AC voltage for aircraft instrument and equipment circuits
Application / Where Used: Aircraft AC power systems, instrument circuits, navigation and monitoring equipment power supply
System / Installation Area: Aircraft AC electrical system / instrument power circuits
Compatible Aircraft / Equipment: Mi-8 / Mi-17 family helicopters, Yak-38, Yak-42
Input Voltage: 200 V AC
Output Voltage: 36 V AC
Rated Power: 1000 VA
Rated Frequency: 400 Hz
Number of Phases: 3
Load Current: 16 A
Power Factor: 0.6
Operating Mode: Continuous operation
Cooling: Natural air cooling
Design Type: Three-phase static dry-type transformer
Weight: Not more than 1.8 kg
Precious Metal Content: Silver — 0.847 g
Delivery Set: Not provided
Associated Equipment: Main and standby AC generator channels; emergency AC supply converters such as PTS-800BM or PT-200Ts, depending on aircraft configuration
Technical Documentation: Technical operation manual 1:5; aircraft electrical system documentation; parts catalog

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Warranty
All products are covered by a standard 6-month warranty.
Extended warranty is available upon request and is agreed individually; it may affect the final product price.