LDZB7-35 current transformer, 20-35KV high-voltage casting type current transformer (indoor type), is suitable for electrical measurement and protection in power systems with rated frequency of 50Hz or 60Hz and rated voltage of 35kV and below
Structure Introduction: The product is a through (single turn) structure, consisting of an iron core, secondary winding, and primary conductive rod, all enclosed in an epoxy casting body. The installation plate is integrated with the casting body, and there are embedded nuts and secondary output terminals for installation and grounding on the installation plate. There is a protective cover at one point of the secondary flashing.
Technical parameters of LDZB7-35 indoor current transformer
1. Rated primary current, rated secondary current, accurate pole and corresponding rated output;
2. The power factor of the load is 0.8 (lagging);
The accuracy limit coefficient for level 3.10 is 20;
4.0.5 level instrument security factor FS ≤ 10;
5. Rated short-time thermal current (effective value): 45kA/1 second;
6. Rated dynamic stability current (peak): 112.5kA;
7. Accuracy level combination: 0.5/10P/10P
Note: Within the allowable range of structural length, the primary current and accurate combination of the product can be selected arbitrarily according to user needs, which can be a composite ratio or four accuracy levels.
8. Rated insulation level: 40.5/95/185kV;
9. The partial discharge level complies with GB5583 and IEC185 "Measurement of Partial Discharge in Transformers", and its apparent discharge capacity is not greater than 50pC
| Rated primary current (A) | Rated secondary current (A) | Accuracy class and rated output (vA) |
| zero point five | 10P |
| four hundred | five | twenty-five | twenty |
| 600; six hundred and thirty | forty | thirty |
| eight hundred | forty |
| one thousand |
| 1200; one thousand two hundred and fifty |
| 1500; one thousand and six hundred |
| two thousand |
LDZB7-35 indoor current transformer