Two solenoids and one proximity switch are installed on the top of the ejection jack. The two solenoids release a lock and the RAT extends. The RAT extends when both or one solenoid is energized. An extend lock keeps the RAT in the extended position.
 A stow proximity switch gives a signal to the ECAM system if the RAT actuator is extended. Two links attach the RAT compartment doors to the leg assembly and open the doors when the RAT extends. The two links also keep the RAT doors closed when the RAT is in its normal stow position. The stowed proximity sensor sends a signal to the RAT control panel and the indicator light RAT STOWED comes on when the RAT is locked in its retracted position.
 The RAT control panel (3GE) is part of the ground-service panel of the Blue hydraulic in the left rear belly fairing. The control panel (3GE) has the controls which operate the RAT retraction. The ejection jack is attached to the top end of the leg assembly and the RAT mounting frame. The ejection jack extends the RAT into the airflow with the force of a spring. Therefore no hydraulic power is necessary to extend the RAT. Hydraulic power is required to retract the RAT. You can retract the RAT only when the aircraft is on the ground.
 Two solenoids and one stowed switch are installed on the top of the ejection jack. The two solenoids release a lock and the RAT extends. The RAT extends when both or one solenoid is energized. An extend lock keeps the RAT in the extended position.
 A stowed switch gives a signal to the ECAM system if the RAT actuator is extended. Two links attach the RAT compartment doors to the leg assembly and open the doors when the RAT extends. The two links also keep the RAT doors closed when the RAT is in its normal stow position. The stowed proximity sensor sends a signal to the RAT control panel and the indicator light RAT STOWED comes on when the RAT is locked in its retracted position.
 The RAT control panel (3GE) is part of the ground-service panel of the Blue hydraulic in the left rear belly fairing. The control panel (3GE) has the controls which operate the RAT retraction.
R 1EFF : 062-099, 106-149, 151-199, 204-299, 1 29-22-00Page 14 1301-399, 401-499, 1Config-1 Aug 01/05 1 1 1CES 1 **ON A/C ALL

 4. Power Supply
____________
 **ON A/C 001-049, 051-061, 101-105, 201-203,
 (Ref. Fig. 006)

R **ON A/C 062-099, 106-149, 151-199, 204-299, 301-399, 401-499,
 (Ref. Fig. 006A)
 **ON A/C 001-049, 051-061, 101-102, 201-202,
 The RAT system gets electrical power from the DC system of the aircraft.
 Hot Battery Bus 1 (701PP) supplies 28 V DC to solenoid 1 on the RAT actuator through the automatic deployment logic. It also supplies solenoid 1 directly when the HYD OVRD switch (2805GE) is operated.
 Battery No. 2 supplies 28 V DC directly to solenoid 2 when the ELEC OVRD switch (24XE) is operated.
 Battery Bus 301PP supplies 28 V DC to the RAT control panel. The supply to the RAT control panel is used for:
 -
the RAT ground retraction module

 -
the RAT position switches

 -
the ground check module.

 There is also a 28 V DC supply from the RAT control panel to the ground test box when it is connected.

R **ON A/C 062-099, 106-149, 151-199, 204-299, 301-399, 401-499,
 The DC system of the aircraft delivers the electrical power to the RAT system.
 The Hot Battery Bus 701PP supplies 28 V DC to the deploy solenoid 1 on the ejection jack when the OVRD HYD switch 2805GE is operated.
 The battery No. 2 supplies 28 V DC to the deploy solenoid 2 when the OVRD ELEC switch 24XE is operated.

 Power Supply Figure 006 
R 1EFF : 1 1 1CES  001-049, 051-061, 101-105, 201-203,  1 111 Page 1629-22-00 Config-1 May 01/05

 Power Supply
 Figure 006A

R 1EFF : 062-099, 106-149, 151-199, 204-299, 1 29-22-00Page 17 1301-399, 401-499, 1Config-1 Aug 01/05 1 1 1CES 1 DC Essential Bus 401PP supplies 28 V DC to the RAT stow panel. The supply to the RAT stow panel is used for:

 -
the stow solenoid,

 -
the pressure switch,

 -
the stow proximity switch,

 -
the interlock proximity switch.

 **ON A/C 103-105, 203-203,
 The RAT system gets electrical power from the DC system of the aircraft.
 Hot Battery Bus 1 (701PP) supplies 28 V DC to solenoid 1 on the RAT actuator through the automatic deployment logic. It also supplies solenoid 1 directly when the HYD OVRD switch (2805GE) is operated.
 Battery No. 2 supplies 28 V DC directly to solenoid 2 when the ELEC OVRD switch (24XE) is operated.
 DC Essential Bus 401PP supplies 28 V DC to the RAT control panel. The supply to the RAT control panel is used for:
　
中國航空網 m.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：A320飛機維護手冊 AMM HYDRAULIC POWER 液壓5(96)