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500KV single-phase autotransformer

ODFS-334000/500
This product is a 500kV single-phase off-circuit tap-changer autotransformer independently developed and designed by TBEA. It is one of the important devices for transmitting electric energy in the ultra-high voltage power grid, and its function is to connect two power grids with similar voltage levels.

Product Advantages
It adopts main column pressure regulation and has a compact structure.
The enhanced insulation design improves the electric field distribution in key areas, resulting in higher reliability.
High impedance, strong short-circuit resistance.
Advanced measures for suppressing high-current magnetic flux leakage are employed to prevent overheating.
It has excellent temperature rise performance and a longer service life.
Application Scenarios
This product can be applied to ultra-high voltage transmission lines, providing strong support for long-distance, cross-regional, and large-capacity energy transmission.

Product Model	–	ODFS-334000/500
Rated capacity	KVA	334000/334000/100000
Rated voltage ratio	KV	(525/√3 )/(230/√3±2×2.5%)/36
short-circuit impedance	%	H-M: 18% H-L: 58% H-L: 38%
rated frequency	Hz	50
Connection group label	–	Ia0i0 (single-phase) YNa0d11 (after three-phase combination)
Insulation level	KV	SI1175LI1550AC680-LI325AC140 LI950AC395- LI325AC140 LI200AC85
cooling method	–	ONAN/ONAF(70%/100%)
No-load loss	KW	65
load loss	KW	485
Temperature Rise Limit	K	Top oil layer: 50 Winding hot spot: 78
Noise (sound pressure level)	dB(A)	70

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