EcoRenovator - View Single Post - Csd-sa1e0-1

Xringer · 03-13-11, 08:55 AM

I found some cheap 230v SSRs (Solid State Relays) on Ebay.
New in Box Solid State Relay SSR 24-480V AC, 25A - eBay )

I'm thinking of using two of these. Putting one on each side of the 230vac feeding the Sanyo.

The SSRs would be normally On, and I would use the CSD-SA1E0-1 over-current signal to turn them off.

At first, I was thinking of using a timer to insure the power was totally
disconnected from the Sanyo for a few seconds.
That would insure the Sanyo would go into a Power Fail Recovery mode,
once timer ran out and the power came back.

But, then I started thinking about skipping the time delay..

1. Over current occurs at 10A.

2. The CSD-SA1E0-1 contacts close, turning off the 5VDC control voltage to the SSRs.

3. The SSRs remain On, until the 60Hz Zero-crossing. Then shut down.

4. No AC current shuts off the CSD-SA1E0-1 and it's 'contacts' open.

5. The 5VDC control voltage is re-applied to the SSRs.

6. At the next Zero-crossing, the SSRs come back on.

7. AC Power is re-applied to the Sanyo.

Depending on the speed of the devices, I guess the AC would be off
1/2 to a full cycle, at a minimum.
The maximum time off could be a few cycles. And it should be possible
to add a tiny time delay, using a small capacitor on the 5VDC control switch.

The goal of a very small time delay, would be to reduce the AC frequency
somewhat, while leaving the voltage alone.

Since Amps are a measure of electrons-per-second, I think, the delay might
reduce the watts being used by the Sanyo..

In other words, it would be a Power Limiter. .

If the CSD-SA1E0-1 was set for 10A, (and the voltage was 250vac),
then it would be impossible for the Sanyo to draw more than 10A.
Thus it's power use would be limited to 2500 watts..

Comments??

03-13-11, 08:55 AM	#8 (permalink)
Xringer lex parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 3,498 Thanks: 44 Thanked 113 Times in 106 Posts	Watts controller? I found some cheap 230v SSRs (Solid State Relays) on Ebay. New in Box Solid State Relay SSR 24-480V AC, 25A - eBay ) I'm thinking of using two of these. Putting one on each side of the 230vac feeding the Sanyo. The SSRs would be normally On, and I would use the CSD-SA1E0-1 *over-current* signal to turn them off. At first, I was thinking of using a timer to insure the power was totally disconnected from the Sanyo for a few seconds. That would insure the Sanyo would go into a Power Fail Recovery mode, once timer ran out and the power came back. But, then I started thinking about skipping the time delay.. 1. Over current occurs at 10A. 2. The CSD-SA1E0-1 contacts close, turning off the 5VDC control voltage to the SSRs. 3. The SSRs remain On, until the 60Hz Zero-crossing. Then shut down. 4. No AC current shuts off the CSD-SA1E0-1 and it's 'contacts' open. 5. The 5VDC control voltage is re-applied to the SSRs. 6. At the next Zero-crossing, the SSRs come back on. 7. AC Power is re-applied to the Sanyo. Depending on the speed of the devices, I guess the AC would be off 1/2 to a full cycle, at a minimum. The maximum time off could be a few cycles. And it should be possible to add a tiny time delay, using a small capacitor on the 5VDC control switch. The goal of a very small time delay, would be to reduce the AC frequency somewhat, while leaving the voltage alone. Since Amps are a measure of electrons-per-second, I think, the delay might reduce the watts being used by the Sanyo.. In other words, it would be a Power Limiter. . If the CSD-SA1E0-1 was set for 10A, (and the voltage was 250vac), then it would be impossible for the Sanyo to draw more than 10A. Thus it's power use would be limited to 2500 watts.. Comments??