PT-500Ts

PT-500Ts aircraft electromechanical converter

PT-500Ts is an aircraft three-phase electromechanical current converter used to transform 27 V DC power from the onboard electrical network into 36 V three-phase AC power at 400 Hz. The unit is intended for aircraft equipment that requires stable three-phase alternating current, including gyroscopic instruments, navigation equipment and automatic flight control system elements. PT-500Ts belongs to the class of rotary motor-generator converters used on Soviet and post-Soviet aircraft and helicopters.

Power conversion function of PT-500Ts

The main function of PT-500Ts is to provide a centralized 36 V / 400 Hz three-phase AC supply from the 27 V DC aircraft bus. According to the supplied context, the converter delivers 500 VA output power and operates with an inductive power factor. This output is used where onboard instruments cannot be powered directly from the DC network. The converter may work as a main or reserve source of alternating current depending on the aircraft type, electrical system design and installed equipment.

Consumers powered by PT-500Ts

PT-500Ts is used to supply aircraft systems that require three-phase AC power. Typical consumers include gyroscopic instruments, attitude and heading reference equipment, navigation systems and automatic control system units. In aircraft and helicopters, this class of converter may support attitude indicators, gyroverticals, heading systems and autopilot-related equipment. The exact consumer list depends on the aircraft electrical diagram and the configuration of the installed avionics.

Application on aircraft and helicopters

The supplied context indicates use of PT-500Ts on aircraft and helicopters, including Mi-8 / Mi-17 family helicopters and aircraft such as An-24, An-26 and Yak-40, depending on modification and documentation. On helicopters, the unit is normally associated with electrical equipment racks, radio compartments or technical equipment zones inside the fuselage. On aircraft, it may be installed in technical compartments, radio-electrical compartments or underfloor equipment areas.

Construction of the PT-500Ts converter

PT-500Ts is an electromechanical motor-generator unit. It consists of a mixed-excitation DC motor and a synchronous three-phase generator arranged on a common shaft in one housing. A control box, such as KSU-500Ts according to the supplied context, may be mounted on the body of the converter. This control unit is associated with remote starting, voltage / frequency regulation and overspeed protection. Built-in filters, including chokes and feedthrough capacitors, are used to reduce radio interference entering the aircraft electrical network.

Installation and maintenance context

PT-500Ts is installed on a rigid aircraft mounting base, frame or shock-mounted support and requires proper ventilation because the unit heats during operation. Since it is a rotary converter, maintenance should include checks of bearings, brushes, collector / commutator condition, insulation, mounting security, vibration, heating, control box operation and output voltage / frequency under load. When ordering or replacing the unit, the exact aircraft type, converter version, documentation package and service condition should be confirmed.

Product Type: Aircraft three-phase electromechanical inverter / rotary converter
Designation: PT-500Ts
Alternative Designations: ПТ-500Ц, PT-500C, PT-500TS, ПТ500Ц
Function: Conversion of 27 V DC aircraft power into 36 V three-phase AC power
Application / Where Used: Aircraft AC power supply for gyroscopic, navigation and automatic control equipment
Compatible Aircraft / Equipment: Mi-8 / Mi-17, An-24, An-26, Yak-40 and other aircraft according to supplied context and documentation
Power Conversion Type: Electromechanical motor-generator converter
Input Voltage: 27 V DC ±10%
Maximum Input Current: Not more than 37 A
Output Voltage: 36 V three-phase AC ±3%, with wider deviation under load according to supplied context
Output Frequency: 400 Hz
Output Power: 500 VA
Number of Phases: 3
Phase Connection: Star connection, according to supplied context
Power Factor: 0.8 inductive
Efficiency Context: More than 40%, according to supplied context
Construction: Mixed-excitation DC motor and synchronous three-phase generator on a common shaft
Control Box: KSU-500Ts control box context, depending on version
Interference Suppression: Built-in filters, chokes and feedthrough capacitors according to supplied context
Operating Role: Main or reserve source of 36 V / 400 Hz AC power depending on aircraft electrical system
Installation Area: Radio-electronic equipment bay, electrical equipment rack, underfloor technical compartment or avionics compartment depending on aircraft type
Mi-8 / Mi-17 Installation Context: Radio compartment or electrical equipment racks inside fuselage according to supplied context
Aircraft Installation Context: Technical compartment under cockpit floor or radio-electrical compartment according to supplied context
Approximate Length: 365 mm
Approximate Body Diameter: 140 mm
Approximate Maximum Height: 190–200 mm with control box
Approximate Maximum Width: 170–180 mm across mounting feet
Mass: Approximately 14.3–15 kg with control box
Mounting: Shock-mounted or rigid mounting base with ventilation, depending on aircraft installation
Condition: New / As-Stored / Overhauled / Serviceable, depending on availability
Technical Documentation: Product passport, test report, serviceability certificate, storage records, aircraft wiring diagrams and maintenance documentation if available

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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.