DOC AIRBUS | AMM A320FNACELLE HARNESS - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
1. General
The Integrated Drive Generator (IDG) Engine Driven Pump (EDP) monitoring harness transmits signals for the control and monitoring of the IDG and the EDP.
** ON A/C NOT FOR ALL The Integrated Drive Generator (IDG) Engine Driven Pump (EDP) monitoring harness transmits signals for the control and monitoring of the IDG and the EDP.
2. Description
The IDG-EDP monitoring harness is installed around the engine and goes up to the pylon interface, where it connects with the electrical system of the aircraft. The harness supplies control signals to the IDG and to the EDP. It also transmits monitoring signals from these components to the cockpit. On the left side of the engine, the harness is attached to the IDG. In addition, one branch of the harness connects to the low oil pressure switch. On the right side of the engine, the harness is connected to the EDP. The harness has standard electrical connectors and it is attached to the engine with brackets, P-clamps and spring clips. The harness is connected to the components that are mounted in the core area of the engine, and it is designed to withstand the high temperature of the environment.
** ON A/C NOT FOR ALL The IDG-EDP monitoring harness is installed around the engine and goes up to the pylon interface, where it connects with the electrical system of the aircraft. The harness supplies control signals to the IDG and to the EDP. It also transmits monitoring signals from these components to the cockpit. On the left side of the engine, the harness is attached to the IDG. In addition, one branch of the harness connects to the low oil pressure switch. On the right side of the engine, the harness is connected to the EDP. The harness has standard electrical connectors and it is attached to the engine with brackets, P-clamps and spring clips. The harness is connected to the components that are mounted in the core area of the engine, and it is designed to withstand the high temperature of the environment.
IDG-EDP-Monitoring Harness-Description and Operation3. Operation/Control and Indicating
The IDG-EDP monitoring harness carries electrical signals between the engine components and the pylon junction box. These signals do the following:
The IDG-EDP monitoring harness carries electrical signals between the engine components and the pylon junction box. These signals do the following:
- Supply electrical current to the permanent magnet armature of the IDG
- Supply power to the exciter field of the IDG
- Control the bypass valve of the hydraulic pump
- Measure the IDG current
- Control the disconnect solenoid of the IDG
- Show that the IDG oil filter is clogged
- Measure the oil temperature going in and out of the IDG
- Measure the oil level of the IDG
- Monitor the servo valve of the IDG
- Monitor the low oil pressure switch of the engine.