ION9000 Power Supply - 'Ride Through Time'

[s2k]

HI all,

I hava a question about ION9000 Power Supply.

According to the manual, the 'ride-through' function is only applied to AC power sources.

Q1. Is it also applied to DC power?

also, Two power lines are used for permanent and emergency use, the ION7650 holds for a few seconds(not sure) when power changes, but the ION9000 turns off immediately. (the power change off time is 30m/s)

Q2. Is there a difference between the two?

Q3. Is there any way to supplement for this?

Thanks a lot

best regard.

[Charles_Murison]

Hello @s2k ,

Does the ION9000 have any IO modules attached? What is the DC voltage level you have connected to the meter? Are you using the LVDC ION9000? How are you deteming that the meter has powered down? Note that the remote display for the ION9000 is not included in the ride through, the remote display will power down however the meter may still be powered for a period of time. Did you check the meter's event log, was there a power down and power up event?

What is the serial number of the meter?

Q1. The meter will still have ride through with a DC supply, the exact amount of time will be a little different for the voltage levels but not by much.

Q2. Yes, there is a different power supply between the ION7650 meter and the ION9000 meters. 

Q3. Note that higher control power voltages do give a higher ride through time. But I would first determine if meter did actually down down or just the display screen. 

Regards,

Charles

[s2k]

Hello @Charles_Murison ,

Thank for your answer.

I using the DC voltage level 'DC110V' and ION9000 have IO modules attached.

How is the IO module related to power off?

The reason why I thought power down is that there was a power-off event left in the event record.

but It does not occur in all meters. (The total number of meters is about 19 and uses the same power source.)

The serial number of the meter is...

MZ-2004A620-01, MZ-2005A248-01, MZ-2007A348-01, MZ-2008A288-01 (Most of with MZ-2008~)

Thanks a lot,

Regards

[Charles_Murison · Accepted solution]

Hello @s2k ,

The IO question was related to a few points, a) the ride through time is based on a meter with no option modules. b) if you were using the option modules as a way to determine the meter powering off. I now know that you are using the event log witch is the correct way to determine. 

Regarding the supply voltage, 120 VAC ~ 169V peak, to get the same 100ms ride through time would require a DC supply of approximately 169 V DC.  Note that the energy stored in the meter is a non linear relationship to voltage.

Regards,

Charles

[s2k]

Hello @Charles_Murison 

I have some questions.

1) I used the ION7650 product before ION9000 was installed. (Same Location, Same Power Source - DC110V)
In the case of ION7650, the 'Ride through' function worked, and there was no power-off record in the event log.
However, in the case of ION9000, the 'ride through' function is not working, and the event log also recorded power off.

What is the difference between these two? Is the 'ride through' function of ION9000 not working in DC110V?

2) The Control power cannot be changed from the user's perspective because other equipment also uses the DC110V power source. (Protection relays, other equipment, etc.)

In this case, is there a recommended method?

Thanks.

Best Regard.

[Charles_Murison]

Hello @s2k ,

The power system in ION7650 meter is completely different than in the ION9000 meter. There is different hardware and the ION9000 consumes more power than the ION7650 meter.

The 100ms spec is for 120 Vac. This number has large amounts of data and repeated tests to backup the statement. The 110 Vdc will have a much smaller ride through on the meter. At this lower voltage level, quick tests show a typical ride through of ~50ms and this number drops to around 30-35 ms when you add remote display, then drops even more if you have IO cards.

I know and understand this may not be easy to do if you have the back to back adapter, but you could try test the meter with the remote display disconnected to see if meter will power cycle during the 30 ms transfer time.

Regards,

Charles