GFLXZK0656-Φ200 200mm Clamp on Zero Sequence Current Transformer 50/5A
Product description
The 200mm dry type Clamp on zero sequence current transformers GFLXZK0656-Φ200 are cast in epoxy resin insulated with large measuring range and are excellent in anti-pollution and humidity protection. With high grade accuracy, it is suitable for protection against large short-circuit current, secondary current output 1A or 5A. The performances of the products meet standards IEC60044-1, IEC61869-2 and ANSI/IEEE C57.13.
Zero sequence current transformers, also known as core balance current transformers (CBCT), detect the presence of zero sequence currents during short circuit fault conditions such as the occurrence of a single line to ground fault that causes unbalanced currents in three-phase systems.
During the normal operation of a three-phase system, the vector sum of the three-phase currents (Ia + Ib + Ic) equals zero, therefore, no magnetic flux is generated by the three phases and no zero-sequence current is detected by the ground fault relay.
During abnormal operations, the occurrence of a single phase to ground fault causes current imbalances in the three phases and with the vector sum of the phase currents not equal to zero, magnetic flux is generated in the core of the zero sequence current transformer and causes current flow to be detected by the ground fault relay.
Parameters
| Technical parameters |
|
| Standards |
IEC60044; IEC 61869; ANSI/IEEE C57.13 |
| Rated primary current |
50-600A |
| Rated load |
≤30VA |
| Rated frequency |
50Hz or 60Hz |
| Rated secondary current |
5A or 1A |
| Rated short-time thermal current |
140kA, 1S |
| Rated dynamic current |
63KA |
| Rated insulation level |
12/42/75KV |
| FS |
≤10 |
| Mechanical parameters |
| Material |
Epoxy resin |
| Weight (kg) |
25 |
| Operating conditions |
| Operating temperature |
-10°C to +55°C |
| Daily average temp |
<+40°C |
| Storage temperature |
-40°C to +70°C |
| Altitude |
<1000 meters |
| Condition |
No existence of severely begrimed, erosive and radioactive gas in the air. Permission of long-term operation under rated current. |
Technical parameters
| Rated Current Ratio |
Accuracy Class |
Rated Output(VA) |
| 50/1 |
10P5 |
2 |
| 60/1 |
2 |
| 75/1 |
2 |
| 100/1 |
2 |
| 150/1 |
10P10 |
2.5 |
| 200-300/1 |
2.5 |
| 400-600/1 |
2.5 |
| 50/5 |
10P5 |
5 |
| 75/5 |
|
| 100/5 |
10 |
| 150-300/5 |
10P10 |
20 |
| 350-600/5 |
30 |
Photo
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