Electrical Connector - Aviation Plug Connector Selection
Dec 16,2022 weichat
The user selects from a large variety of aviation plug connectors a connection that meets a set of requirements. It is not an easy task, for example. Connector form factor, construction, type of insulation, contact material, plating and termination methods, etc.. All directly related to the system's reserved space, performance requirements and interconnection requirements. The user can select a satisfactory connector through a basic understanding of the connector and from the performance requirements (such as electrical properties, mechanical properties, environmental performance and termination technology).
Electrical parameters required
In the selection of electrical connectors, the first thing to consider the voltage and current requirements, followed by the electrical parameters to be considered are.
Contact sun:
For low resistance circuits, the aviation plug connector is connected in series in the circuit when the contact sun is the key parameter. The maximum current ------ is limited by the electrical connector and the wire number it is terminated with.
The maximum voltage:
Depends on the gap between the circuits (i.e. contact spacing and creepage distance) and the insulation material used in the aviation plug connector
Mechanical parameters required
In addition to the dimensional limits of the space occupied by the aviation plug connector, the following mechanical parameters must be taken into account when selecting a connector.
Vibration and shock:
According to the expected vibration and shock requirements for the selection of the appropriate electrical connector. As the aircraft or missile flight speed increases. Vibration and shock increase, causing cracks in the insulating mounting plate, the wire and contact joints (welded or crimped) fracture. Even caused by the separation of the plug-in parts. Especially in the resonance is more violent. Insulation mounting plate and the shell between the rubber ring and flexible insulation mounting plate has a shock absorption or cushioning effect
Locking method:
To prevent vibration caused by the separation of the aviation plug connector, you must choose a safe and reliable locking method, the general locking method is a threaded connection plus safety fuse, while the bayonet locking method is not only good shock resistance, and rapid connection.
Positioning key:
In order to prevent similar aviation plug connectors from being misplaced together, several positioning key structures can be used at the same time. The installation method ------ indicates whether it is front or rear mounted.
Maintenance requirements ------ Since the actual situation of maintenance may not coincide with the expected connection and separation, the possible maintenance conditions should be considered to select the appropriate termination method, mounting method, and allowable insertion force.
Environmental parameters required
The environment in which the connector is used and transported has a significant impact on its performance, so the corresponding connector should be selected according to the expected environmental conditions.
Ambient temperature ------ by the metal materials and insulation materials in the connection determines the operating ambient temperature of the connector. Humidity or water ------ is used for aviation plug connectors external to the device. Environmental conditions of humidity, water penetration and sand are often taken into account. In such cases aviation plug connectors with good sealing should be selected.
Atmospheric pressure ------ at high altitudes where the air is thin. Voltage resistance is reduced. Usually the altitude limit of about 30,000 meters corrosive environment ------ according to the different corrosion to make the environment, the choice of aviation plug connectors by the corresponding metal, plastic, plating structure.
The operation and use of electrical connectors.
Connection and separation
Connector plug and socket connection, because the plug and socket have a blind plug function. First of all, the head guide section into the socket, and then rotate the plug, to be positioned in five keys, and then rotate the nut clockwise, the three pegs quickly into the three curved groove. Then rotate about 120 ° will hear the "click" sound, this time the plug and socket has been correctly positioned, and the plug, socket has been locked
When separating, gently push forward the connection nut and rotate counterclockwise, the plug and the bracket will be well separated. Connector wiring, must be terminated according to the corresponding contact serial number.
Electrical connector is not locked before. Prohibit the use of power.