Jump to content
Aero Precision provides OEM part support for military aircraft operators across more than 20 aircraft

Recommended Posts

Hello  World Hercules Fuel & Avionic  Expertise!

All 14 fuel tanks  electrical pumps are operated by 3 phase power supply , controlled through 3 phase (4 poles) SWs mounted on OH Fuel control & management panel, where others Aircraft, AC pumps are controlled  remotely by single wire (single pole)  SWs through  3 phase relays. what is reason behind it?

Best Regards

Munir Abbasi 

Home of Hercules Pakistan

Link to post
Share on other sites
On 11/21/2020 at 7:53 PM, munirabbasi said:

Hello  World Hercules Fuel & Avionic  Expertise!

All 14 fuel tanks  electrical pumps are operated by 3 phase power supply , controlled through 3 phase (4 poles) SWs mounted on OH Fuel control & management panel, where others Aircraft, AC pumps are controlled  remotely by single wire (single pole)  SWs through  3 phase relays. what is reason behind it?

Best Regards

Munir Abbasi 

Home of Hercules Pakistan

Hello  World Hercules Fuel & Avionic  Expertise!

All 14 fuel tanks  electrical pumps are operated by 3 phase power supply , controlled through 3 phase (4 poles) SWs mounted on OH Fuel control & management panel, where others pumps like hydraulic ,prop feathering AUX pump , ACS recirculating fan ,  are controlled  remotely by single wire (single pole)  SWs through  3 phase relays. what is reason behind it?

Best Regards

Munir Abbasi 

Munir Abbasi Home of Hercules Pakistan

Home of Hercules Pakistan

Link to post
Share on other sites
On 11/21/2020 at 8:53 AM, munirabbasi said:

Hello  World Hercules Fuel & Avionic  Expertise!

All 14 fuel tanks  electrical pumps are operated by 3 phase power supply , controlled through 3 phase (4 poles) SWs mounted on OH Fuel control & management panel, where others Aircraft, AC pumps are controlled  remotely by single wire (single pole)  SWs through  3 phase relays. what is reason behind it?

Best Regards

Munir Abbasi 

Home of Hercules Pakistan

The pumps are connected to multiple power sources (and wire routing) so one set of wires accomplishes a simple control input to the pump regardless of power source.

Link to post
Share on other sites

Had to think about this for a while. I remember sitting in the Engineer's seat for many hours pondering the design of electrical systems. The simplicity of the three phase overhead fuel panel switch allows for control even if DC busses are lost. Something you would loose if you used DC power to control a power relay.

Link to post
Share on other sites
1 hour ago, n1dp said:

Had to think about this for a while. I remember sitting in the Engineer's seat for many hours pondering the design of electrical systems. The simplicity of the three phase overhead fuel panel switch allows for control even if DC busses are lost. Something you would loose if you used DC power to control a power relay.

Sir David I do not agree with you  all three phase ESS AC services (PUMPS) are controlled remotely, Except No.2 Fuel Tank pump.

Munir Abbasi

Home of Hercules Pakistan 

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...