TSV36M313

TSV36M313 slip ring unit on the helicopter main rotor

The TSV36M313 is a helicopter main rotor slip ring unit used to transfer electrical power from the fixed onboard wiring to rotating consumers on the main rotor. It is installed in the rotor hub area and works as the electrical transition between stationary helicopter circuits and the rotating blade system. According to the passport data, the unit handles several different circuits at the same time, including three-phase AC power, single-phase AC lighting power and DC control circuits.

Power transfer through the TSV36M313

The TSV36M313 transmits electrical energy through contact rings and brush assemblies. This allows the rotating part of the main rotor to receive power while the rotor is in motion. The most heavily loaded part of the unit is the anti-icing power circuit, where the current load differs by phase. Because the unit carries high current, the condition of the brushes, contact rings, insulation, terminals and mounting surfaces directly affects system reliability.

TSV36M313 in the blade anti-icing system

One of the main functions of the TSV36M313 is power supply to the heating elements of the main rotor blade anti-icing system. In this circuit, the unit transmits three-phase AC power at aviation frequency. The passport specifies 208 ±10.4 V and 400 ±20 Hz for the three-phase circuit. The current load is not equal across all phases: phase B is rated higher than phases A and C. This detail is important during inspection and troubleshooting of the anti-icing system.

Contour lights and control circuits through TSV36M313

Besides the main anti-icing circuit, the TSV36M313 also carries power for blade contour lights and low-current control or monitoring circuits. The contour light circuit uses single-phase AC at low voltage. The control and monitoring buses operate from the DC aircraft network. These circuits are lower in current than the anti-icing circuit, but they still depend on stable brush contact and correct electrical continuity through the rotating assembly.

Aircraft use of TSV36M313

The TSV36M313 is used on helicopters with electrically powered main rotor blade equipment, including Mi-8, Mi-17, Mi-171, Mi-14, Mi-24 and Ka-32 types, depending on configuration. Its exact role on a particular helicopter depends on the installed anti-icing system, lighting equipment and rotor electrical layout. For replacement, the unit should be checked against the aircraft parts catalog, electrical diagram and passport data, not only by general designation.

Brush set and service points of TSV36M313

The passport комплектность includes the TSV36M313 slip ring unit and two brush types. The brush set is important because wear, burning, contamination or poor seating of brushes can cause heating, unstable contact, voltage drop or loss of a circuit. During maintenance, technicians normally inspect contact rings, brush holders, brush condition, terminals, insulation, signs of overheating and free mechanical condition of the rotating interface.

Supply and identification of TSV36M313

When ordering the TSV36M313, the full designation should be stated, and the required helicopter type should be specified if known. It is also useful to confirm whether the unit is supplied complete with brushes and passport. For aviation supply, the key points are passport availability, storage condition, category, repair status, completeness and compliance with the required aircraft configuration. The passport data should be used as the main reference for voltage, frequency, current load, weight and комплектность.

Product Type: Helicopter main rotor slip ring unit / current collector
Designation: TSV36M313 / ТСВ36М313
Function: Transfer of electrical power and control circuits from fixed helicopter wiring to rotating main rotor equipment
Application / Where Used: Main rotor electrical systems of helicopters
System / Installation Area: Main rotor hub / rotating electrical interface
Main Functions: Power supply to blade anti-icing heaters; supply to blade contour lights; transfer of control and monitoring circuits; electrical bonding / metallization between rotor shaft and helicopter structure
Compatible Aircraft / Equipment: Mi-8, Mi-17, Mi-171, Mi-14, Mi-24, Ka-32 helicopters depending on configuration

Three-Phase AC Circuit Voltage: 208 ±10.4 V
Three-Phase AC Frequency: 400 ±20 Hz
Three-Phase AC Current Load: Phase B / terminal K2 — 125 A; phases A and C / terminals K1 and K3 — 90 A each

Single-Phase AC Circuit Voltage: 7.5 ±0.75 V
Single-Phase AC Circuit Current Load: Not more than 6 A

DC Control and Monitoring Circuit Voltage: 27 ±2.7 V
DC Control and Monitoring Circuit Current Load: Not more than 3 A

Electrical Interface Principle: Contact rings and brush assemblies for rotating electrical transfer
Weight: Not more than 25.3 kg

Passport Completeness:
TSV36M313 Slip Ring Unit: 1 pc
Brush 8A5.593.134: 22 pcs
Brush 8A5.593.137: 4 pcs

Precious Metal Content: Silver — 571.32 g
Technical Documentation: Product passport, aircraft parts catalog and helicopter electrical system documentation as applicable

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In Stock — items available in stock at the Dubai warehouse are dispatched within 5–10 business days after receiving 100% prepayment.

Remote Stock — items available at our partners’ remote warehouses are supplied within an average of 30–45 business days after receiving 100% prepayment.

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Returns & Changes (Restocking Fee)
For selected items, a RESTOCKING FEE of 10% may apply in case of return, order cancellation, or changes to the order specifications. This condition applies only to certain products and is confirmed at the order approval stage.

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.