AC bus tie contactor input into RAT auto-deploy

A system comprising:

• a first AC bus configured to supply power from a first generator;
• a first generator line contactor (GLC) selectively connecting the first AC bus to the first generator;
• a second AC bus configured to supply power from a second generator;
• a second GLC selectively connecting the second AC bus to the second generator;
• an auxiliary generator line contactor (ALC) connected to selectively supply power to the first and second AC buses from an auxiliary generator;
• a first bus tie contactor (BTC) electrically connecting between the first GLC and the ALC;
• a second BTC electrically connecting between the ALC and the second GLC;
• and
• a ram air turbine (RAT) automatic deployment controller operatively connected to the first GLC, the second GLC, the ALC, the first BTC, and the second BTC to automatically deploy the RAT based on the combined status of the first GLC, the second GLC, the ALC, the first BTC, and the second BTC, wherein the RAT automatic deployment controller is configured to deploy the RAT only if the first BTC and second BTC are both open or the ALC is open, and the first GLC and the second GLC are both open wherein the RAT automatic deployment controller is configured to deploy the RAT only if the following logical condition is met:
• an air mode is detected for an aircraft onboard which the RAT is located;
• the first GLC is open;
• the second GLC is open;
• and
• the ALC is open OR the first and second BTC's are both open.

A method of distributing power comprising:

• supplying power to at least one of a first AC bus and a second AC bus from at least one of a first generator, a second generator and/or an auxiliary generator;
• and
• automatically deploying a ram air turbine (RAT) if the first and second AC buses are powered off, wherein automatically deploying the RAT is only performed if a first and a second GLC's are open and a first bus tie contactor (BTC) a second BTC are both open or an auxiliary generator line contactor (ALC) is open, wherein automatically deploying the RAT is performed only if the following logical condition is met:
• an air mode is detected for an aircraft onboard which the RAT is located;
• the first generator line contactor (GLC) selectively connecting the first AC bus to the first generator is open;
• the second GLC selectively connecting the second AC bus to the second generator is open;
• and
• the ALC is open OR the first and second BTC's are both open.