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POWER BUSS 2075

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RotaxLycoming or Continental
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Overview

The Power Buss 2075 is an electronic device designed to control and monitor the electrical circuits in an aircraft. The device employs solid state PTC current limiting fuse devices that automatically remove power from a circuit if it becomes overloaded. Just like conventional circuit breakers, a tripped circuit can be reset by turning off the device for a few seconds, then turning it back on. If a circuit trips due to overload, the pilot will instantly hear a distinctive voice message in his headset, and through the built in speaker. The voice warning will continue until the pilot pushes the panel mounted switch, with built in light, stopping the voice and turning on the built in red light. This provides a visual indication of the tripped circuit. The red light remains illuminated as long as the fault exists. The pilot can check the system at any time by pushing the switch. This performs a self test of the system. If any circuits have tripped, the pilot will hear the voice messages indicating what circuit has tripped. If no circuits are tripped, the pilot will hear the voice message "TEST OK". Connections to the power buss are made by using quick connect terminals. The power buss can be mounted anywhere behind the panel. the combination switch/light should be mounted in the panel, within the pilots normal scan. A separate buss is provided for the avionics. The avionics buss can be turned off whenever the engine starter is engaged. A separate master switch mounted close to the battery is required, as well as circuit breakers for the generator and devices drawing more than 11 amps. Not all circuits need to be used.

The Power Buss is designed for 12volt systems only. Maximum current on the board is 30 amps. Maximum current on any one circuit is 11 amps. The audio output is designed to connect to an unswitched input in an audio panel or a radio.

Note: This system is not FAA approved. It is intended for installation in Experimental category aircraft only.

The Power Buss is available in two versions:

2075-A: Designed specifically for use in both fixed and retractable gear land aircrafts that are powered by Rotax engines. It incorporates PTC fuses and voice messages for the most common circuits used in these aircrafts.

2075-CL: Designed specifically for use in both fixed and retractable gear land aircrafts that are powered by either Lycoming or Continental aircraft engines. It incorporates PTC fuses and voice messages for the most common circuits used in these aircrafts.

Features

  • Uses solid state resetable PTC current limiters (Poly fuses)
  • Weighs only 13 oz. complete with mounting bracket
  • Uses no panel space except for a test switch with light
  • Can control up to 19 separate circuits
  • Provides instantly alerting voice warnings heard in the pilots headset and through the built in speaker whenever a circuit trips
  • Low cost and easy to install

Specifications

CIRCUIT TYPE ANNUNCIATION PTC SIZE (4) WIRE SIZE (3) REMARKS
EXTERNAL CIRCUITS Generator n/a External circuit breaker required
Landing Gear n/a External circuit breaker required
SPECIAL CIRCUITS Buss One 7 amp 20 Switched by Master Relay
Buss Two 7 amp 20 Switched by Master Relay
Regulator 5 amp 22 Switched by Split Master Switch
SWITCHED CIRCUITS Panel Lights 5 amp 22 aircraft lighting
Strobes 7 amp 20 aircraft lighting
Nav Lights 7 amp 20 aircraft lighting
Landing Lights 11 amp 18 aircraft lighting
Bilge Pump 5 amp 22 other systems
Trim 5 amp 22 other systems
Heater 5 amp 22 other systems
Flaps 5 amp 22 other systems
Fuel Pump 5 amp 22 other systems
AVIONICS BUSS (1) GPS 5 amp 22 avionics system
Intercom 5 amp 22 avionics system
Transponder 5 amp 22 avionics system
Gear Alert 5 amp 22 avionics system
Radio 7 amp 20 avionics system
Aux Avionics 7 amp 20 avionics system
SYSTEM TEST (2) Test OK n/a push power buss warning light
HIGH VOLTAGE TRIP High Voltage n/a indicates a high voltage cutout

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