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nuckolls.bob(at)aeroelect
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 Posted: Sun Jan 24, 2016 5:20 pm Post subject: Difference between LR3C and SB1A Regulators |
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At 07:39 PM 1/23/2016, you wrote:
| Quote: | Guys
Can anybody please explain the difference(s), if any, between regulators LR3C and SB1A from B&C? |
The LR series regulators are designed to drive
legacy alternators in either 14 or 28v systems.
They feature internal ov protection and lv warning.
The SB1 series regulators also feature ov protection
but their lv warning systems are replaced by a
circuit that monitors alternator output activity
which is normally zero when the main alternator is
running. Should the main alternator quit, bus voltage
falls, the standby alternator wakes up and a panel
mounted "ALTERNATOR LOADED" lamp illuminates to
announce the change in system status. Further, an
output current sensor on the b-lead will cause the
ALT LOADED light to flash if there's too many
demands on the SB alternator's capability.
The pilot shuts things off until the light stops
flashing.
Bob . . .
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trigo(at)mail.telepac.pt
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| Posted: Tue Jan 26, 2016 5:37 pm Post subject: Difference between LR3C and SB1A Regulators |
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Thanks Bob
So, normally in flight both field lines (to MAIN ALT and to STANDBY ALT) should be On?
In this case, we can say that theoretically both alternators are producing electricity, but there’s no current flowing in the wire that comes from the “weaker” alternator?
And what about flying with only the MAIN ALT field switch On, and the Backup ALT field switch Off, the latter only to be flipped On by the pilot when he notices no current is flowing from the MAIN ALT?
Is this not recommended?
Carlos …
From: owner-aeroelectric-list-server(at)matronics.com [mailto:owner-aeroelectric-list-server(at)matronics.com] On Behalf Of Robert L. Nuckolls, III
Sent: segunda-feira, 25 de Janeiro de 2016 01:14
To: aeroelectric-list(at)matronics.com
Subject: Re: AeroElectric-List: Difference between LR3C and SB1A Regulators
At 07:39 PM 1/23/2016, you wrote:
Guys
Can anybody please explain the difference(s), if any, between regulators LR3C and SB1A from B&C?
The LR series regulators are designed to drive
legacy alternators in either 14 or 28v systems.
They feature internal ov protection and lv warning.
The SB1 series regulators also feature ov protection
but their lv warning systems are replaced by a
circuit that monitors alternator output activity
which is normally zero when the main alternator is
running. Should the main alternator quit, bus voltage
falls, the standby alternator wakes up and a panel
mounted "ALTERNATOR LOADED" lamp illuminates to
announce the change in system status. Further, an
output current sensor on the b-lead will cause the
ALT LOADED light to flash if there's too many
demands on the SB alternator's capability.
The pilot shuts things off until the light stops
flashing.
Bob . . .
 Este e-mail foi enviado a partir de um computador sem vĂrus protegido pela Avast. www.avast.com
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