Comments on: High & Low voltage cut-off with delay& alarm

By: Seetharaman

Seetharaman — Tue, 07 Feb 2012 07:24:27 +0000

Hi Balu VR2 is wrongly shown as VR3 in the schematic. For appliance connection please refer to my 6th Feb comment.

By: Balu prasad

Balu prasad — Mon, 06 Feb 2012 17:27:39 +0000

please help me to find where vr2 is.Also where should we connect the appliance to be protected in case of over voltage?

By: Seetharaman

Seetharaman — Mon, 06 Feb 2012 17:24:55 +0000

Hi John use the normaly open contact(when the relay is in off condition)of the relay RL1 to switch on off the load.
Hi ipoy20 this is a working model and a proven design for step voltage regulators.

By: ipoy20

ipoy20 — Mon, 06 Feb 2012 08:08:13 +0000

is this working? please send a reply asap. godbless

By: john

john — Wed, 28 Sep 2011 17:56:48 +0000

hey,pliz email me on how to connect the load.

By: seetharaman

seetharaman — Tue, 27 Sep 2011 16:00:46 +0000

Hi John You can use 2N2219, 2N2218, 8050, 2N1711. any medium power switching transistor can be used.

By: john n

john n — Mon, 26 Sep 2011 09:00:59 +0000

hey ,thanx for the contribution to technology,i have tried making this project but the sl100 transister is rare so i tried the D313 as an option its still not workin ,pliz suggest another option,thanx in advance.

John.

By: حسامالورد

حسامالورد — Mon, 07 Feb 2011 16:21:03 +0000

Great and simple circuit, but I searched for circuit that protects the drive three phase 380V AC interruption of one of the stages, but I did not find it, or the opposite one of them.

By: hosam

hosam — Mon, 07 Feb 2011 16:07:32 +0000

Can we use transistors instead of integrated circuit IC 555, for the alarm?

By: NNAMDI UGOCHUKWU

NNAMDI UGOCHUKWU — Sun, 05 Dec 2010 05:14:39 +0000

PLS,I WANT FULL WRIT UP ON HIGH AND LOW VOLTAGE CUTOFF PROTECTOR