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Galooli supports a variety of AC meters and Current Transformer Rings according to the changing needs of the users, different currents, amount of phases, conversion ratio, and the diameter of the AC cables.
The meters can include an entry for the AC cable or meters that require the use of Current Transformer Rings.
Current Transformer Rings can be used with cables of varying diameters, some of which have an open and close mechanism.
Which AC meters are suitable for which Current Transformer Rings?
CE Transducer CE42 AC meter works without any Current Transformer Ring however, the cable entry
can
be too narrow for some cable's diameter. CE Transducer CE42CT AC meter works best with theCEhttps://galooli.atlassian.net/wiki/spaces/KP/pages/2441969800/AC+Current+Transformer+Rings+CT#CE-CTH-Split Core-Core%5BhardBreak%5Drings. Specifically with the rings
that has a conversion ratio of 1A. Carlo Gavazzi EM210 AC meter works best with the Rogowski https://galooli.atlassian.net/wiki/spaces/KP/pages/2441969800/AC+Current+Transformer+Rings+CT#Rogowski-CT rings.
How to choose the accurate AC Meter and Current Transformer Ring for my site?
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What is the current that needs to be measured?
How many phases does the energy source have?
What is the conversion ratio?
What is the diameter of a cable that needs to be measured?
The following table allows you to easily choose the required products.
Catalog numbers are internal to Galooli.
Ring Diameter/Current | ≤ 30A | ≤ 50A | ≤ 150A | ≤ 200A | ≤ 4000A |
| |||||
400-ACMetAJ42B-502
No Current Transformer Ring needed |
| |||
| ||||
400-ACMetCE42CT-502
400-AcRin24H30A1A-502CE42CT
400-ACMetCE42CT-502
Split Core (24mm/30A) |
400-AcRin24H50A1A-502CE42CT
400-ACMetCE42CT-502
Split Core (24mm/50A) |
400-AcRin24H150A1A-502
Split Core (24mm/150A) |
|
|
|
400-AcRin36H30A1A-502CE42CT
400-ACMetCE42CT-502
Split Core (36mm/30A) |
400-AcRin36H50A1A-502CE42CT
400-ACMetCE42CT-502
Split Core (36mm/50A) |
400-AcRin36H150A1A-502
Split Core (36mm/150A) |
|
| |||
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400-EM210HICU-502
400-AcRog350-502
CT (350mm) | |||||
| |||||
400-AcRog600-502
CT (600mm) | |||||
| |||||
400-EM210HICU-502
400-AcRog900-502
CT (900mm) |
How accurate are the AC Meter and the AC ring?
Item Codes/Data | Meter | Ring | Accuracy | |||
|---|---|---|---|---|---|---|
Calculation
|
|---|
Examples
Galooli Item Code | Voltage reading | Current reading | CT | Overall voltage | *Overall current accuracy | *Overall kwh |
Input voltage
Voltage-
Voltage+
Input current
Current-
Current+
Kwh
Kwh-
Kwh+
CE Transducer CE42CT (Meter) | 0.50% | 0.50% | Not relevant | |||
CE-CTH Split Core 24mm/30A (Ring) | 0.50% | 0.50% |
1. |
00% | 0.50% |
1.50% |
230
2. |
232.5
150
-148.5
+151.5
200
-197
+203
60% | |||||
CE-CTH Split Core 24mm/50A (Ring) | 0.50% | 0.50% | 0.50% | 0.50% | 1.00% |
2. |
230
227.5
232.5
50
-49.5
+50.5
200
-197
+203
10% | ||
CE-CTH Split Core 24mm/150A (Ring) | 0.50% | 0.50% |
0. |
50% | 0.50% | 1 |
.00% |
230
1. |
232.5
30
-29.55
+30.45
200
-196
+204
50% | ||
CE-CTH Split Core 36mm/30A (Ring) | 0.50% | 0.50% |
1. |
00% | 0.50% |
1.50% |
230
2. |
232.5
150
-148.5
+151.5
200
-197
+203
60% | |||||
CE-CTH Split Core 36mm/50A (Ring) | 0.50% | 0.50% | 0.50% | 0.50% | 1.00% |
2. |
230
227.5
232.5
50
-49.5
+50.5
200
-197
+203
10% | ||
CE-CTH Split Core 36mm/150A (Ring) | 0.50% | 0.50% |
0. |
50% | 0.50% | 1. |
00% |
230
227.5
232.5
30
-29.55
+30.45
200
-196
+204
1.50% | ||||||
**CE Transducer CE42 (Meter) | 0.50% | 0.50% | Not relevant | 1.00% | ||
230
235
200
-199
+201
200
-198
+202
***400-AcRin150A5A-502 (Ring) | 0.50% | 0.50% | 1.00% | 0.50% | 1.50% | 2.00% |
228.8
231.2
150
-147.75
+152.25
200
-196
+204
***400-AcRin50A5A-502 (Ring) | 0.50% | 0.50% | 3.00% | 0.50% | 3.50% | 4.00% |
230
228.8
231.2
50
-44.75
+55.25
200
+208
*Overall current accuracy = Meter current reading accuracy + CT Accuracy
*Overall kwh accuracy = Overall voltage accuracy + Overall current accuracy
**The meter can measure current and voltage without a CT ring
***These rings are not available for sale
Calculation Examples
In order to see the calculation method and ensure that the data for the units are correct for you, please
refer to the attached Excel file. You should download the Excel file to your computer.
| View file | ||
|---|---|---|
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What is the best way to install the AC meters and Current Transformer Rings on site?
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