10kv voltage transformer – outdoor epoxy resin cast fully enclosed type
06-21 2025 | By:
10kv voltage transformer – outdoor epoxy resin cast fully enclosed type
This 10kv voltage transformer is an outdoor epoxy resin cast fully enclosed structure, suitable for outdoor power systems with a rated frequency of 50H or 60Hz and a rated voltage of 10kV for energy metering, voltage monitoring and relay protection.
10kv voltage transformer – outdoor epoxy resin cast fully enclosed type
Technical parameters
1. Surface creepage distance: meets the II level of pollution;
2. Load power factor: COSΦ=0.8 (lagging);
3. Product standard: GB1207-2006 “Voltage Transformer”.
Voltage transformer ratio parameters
Rated voltage ratio 10000/√3/100/√3/100/√3
Accuracy level combination 0.5
Rated output (VA) 0.2/75 0.5/120 3P/120
Limit output (VA) 960
Rated insulation level 7.2/32/60
10kv voltage transformer – outdoor epoxy resin cast fully enclosed type
Structural features
This type of voltage transformer has a small size and strong climate adaptability. Due to the use of outdoor epoxy resin casting, this product has the characteristics of pollution resistance and UV resistance, and is suitable for use in warm areas. The transformer core adopts a C-shaped structure and high magnetic permeability material. The primary and secondary voltage windings are concentrically wound together and cast with epoxy resin. The three-phase castings are connected together and fixed on the bottom plate. There are junction boxes and four mounting holes on the bottom plate for installation. When used in the system, each group requires three castings, which are mounted on the three-phase five-column core. The metering winding and protection winding are separated. It effectively ensures the accuracy of measurement and the reliable function of protection.
Function
1. For ferromagnetic resonance circuits, the circuit may have more than one stable working state under the same power supply potential. The circuit is stable in which working state depends on the transition process caused by external impact.
2. The nonlinear ferromagnetic characteristics of the voltage transformer are the root cause of ferromagnetic resonance, but the saturation effect of the ferromagnetic element itself also limits the amplitude of the overvoltage. In addition, the loop loss also damps and limits the resonant overvoltage. When the loop resistance is greater than a certain value, there will be no strong ferromagnetic resonance overvoltage.
3. For the series resonant circuit, the necessary condition for the generation of ferromagnetic resonance overvoltage is ω0=1/L0C<;ω. Therefore, ferromagnetic resonance can occur in a wide range.
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