Single Phase 200A Electric Meter Burnt Out on 3-Phase 230V Supply, 30A Load

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Why would a 200A single-phase meter burn out repeatedly on a 30A load connected to a 230V three-phase, three-wire supply?

The meter/base setup is likely not suitable as connected: a small single-phase meter like this is unlikely to be usable directly at 200A or even 30A, and it may need CTs to reduce the input current to 1A or 5A instead [#21684952] The exact meter specification matters, so the nameplate or photo should be checked to confirm whether it is a self-contained meter or a CT-operated setup [#21684954]

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Suspected supply fluctuation causing meter burnout
#1 21684946 16 Aug 2020 15:57

MARWIN GUILLENA MARWIN GUILLENA

Anonymous

Suspected supply fluctuation causing meter burnout
Post #1 21684946 16 Aug 2020 15:57

Hi ! I have a single phase electric meter rated 200amp and the load is just 30amps max!. After several months of using it just burnt out for no reason

Note: We ensure that the terminals is tight and the meter base and the meter itself is brand new but after only several months it always burnt for no reason
It is connected to a 3 phase 3 wire supply. with line to line voltage of 230v

idk guys if its because of fluctuation of electric provider or what.
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#2 21684947 18 Aug 2020 02:31

Alan Gallagher Alan Gallagher

Anonymous

Post #2
21684947 18 Aug 2020 02:31

Hi MarwinDo you have any info on the meter, brand, model etc?And your incoming supply voltage, you said that its 3 phase 3 wire, is that 115v phase to ground?And when you say burnt out, how exactly do you mean? What happens to the meter?
Line-to-line 230 V likely burned the single-phase meter
#3 21684948 18 Aug 2020 06:30

MARWIN GUILLENA MARWIN GUILLENA

Anonymous

Line-to-line 230 V likely burned the single-phase meter
Post #3 21684948 18 Aug 2020 06:30

yes it is GE kv2c class 200 single phase meter.

yeah 115v phase to ground but we're using line to line 230v

burnt out .. I mean totally like the meter base and the meter are totally burnt. Given that all terminals and clip are tight and given that the load is just 30amps I cant find any reason to prove why my meter always burnt. I dont know man if it is due to the fluctation or something else i hope you can help me with this situation sir.
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Line-to-line 230 V likely caused meter burnout
#4 21684949 18 Aug 2020 06:30

MARWIN GUILLENA MARWIN GUILLENA

Anonymous

Line-to-line 230 V likely caused meter burnout
Post #4 21684949 18 Aug 2020 06:30

yes it is GE kv2c class 200 single phase meter.

yeah 115v phase to ground but we're using line to line 230v

burnt out .. I mean totally like the meter base and the meter are totally burnt. Given that all terminals and clip are tight and given that the load is just 30amps I cant find any reason to prove why my meter always burnt. I dont know man if it is due to the fluctation or something else i hope you can help me with this situation sir.
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#5 21684950 19 Aug 2020 04:33

Alan Gallagher Alan Gallagher

Anonymous

Post #5
21684950 19 Aug 2020 04:33

Do you have any details on the meter base?And what ratio CT's are used to connect to the meter?
#6 21684951 24 Aug 2020 07:56

MARWIN GUILLENA MARWIN GUILLENA

Anonymous

Post #6
21684951 24 Aug 2020 07:56

Its just a self contained meter sir .and the meter base is just 200amp 5 jaws
#7 21684952 24 Aug 2020 12:26

Alan Gallagher Alan Gallagher

Anonymous

Post #7
21684952 24 Aug 2020 12:26

A small meter like that is unlikely to be suitable for 200A or even 30Amps. I would expect it to need to have CT's used in combination with it to bring the input current down to 1 or 5 amps. something like what is shown below.
#8 21684953 25 Aug 2020 06:30

MARWIN GUILLENA MARWIN GUILLENA

Anonymous

Post #8
21684953 25 Aug 2020 06:30

idk sir because if my meter and meter based are rated 200amps how come that my meter always burnt if I only have 30amps load max ...
#9 21684954 25 Aug 2020 09:10

Alan Gallagher Alan Gallagher

Anonymous

Post #9
21684954 25 Aug 2020 09:10

Hi Marwin,Do have have a photo of the nameplate or exact specification for the meter?
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#10 21684955 25 Aug 2020 13:43

Alan Gallagher Alan Gallagher

Anonymous

Post #10
21684955 25 Aug 2020 13:43

Something like this is what i ment.
Single-phase smart meter functions and AMI connectivity
#11 21684956 10 Sep 2020 15:07

jessewalter375 jessewalter375

Anonymous

Single-phase smart meter functions and AMI connectivity
Post #11 21684956 10 Sep 2020 15:07

Single-phase electricity meters are designed essentially to measure energy consumption and its quality factor as well as provide means to prevent tampering. Today’s smart meters can connect to a wide-area network (WAN) and the cloud through a data concentrator and a home area network together with in-home devices in addition to gas and water meters. This enables the automatic metering infrastructure (AMI) that helps utilities better manage customer services and encourage consumers to embrace energy-savvy behavior to optimize their costs.
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Topic summary

A single-phase GE KV2C class 200 electric meter rated for 200A was installed on a 3-phase 3-wire supply with a line-to-line voltage of 230V and a maximum load of 30A. Despite proper installation with tight terminals and a new 200A 5-jaw meter base, the meter and base repeatedly burnt out after several months of use. The supply voltage is 115V phase-to-ground, but the meter is connected across the 230V line-to-line voltage. The meter is self-contained without current transformers (CTs). Concerns were raised about the suitability of a small self-contained meter for this application, as such meters typically require CTs to reduce current input to 1 or 5 amps for accurate and safe operation. The issue may stem from improper meter selection or connection to a 3-phase supply using a single-phase meter rated for different voltage conditions, potentially causing meter damage due to voltage or current mismatches.
AI summary based on the discussion. May contain errors.

Single Phase 200A Electric Meter Burnt Out on 3-Phase 230V Supply, 30A Load

Why would a 200A single-phase meter burn out repeatedly on a 30A load connected to a 230V three-phase, three-wire supply?

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