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Product Description

The S13-M.RL/S11-M.RL series hermetically sealed three-phase tridimensional toroidal-core transformer produced by our company is different from traditional planar toroidal-core transformers. Its core is composed of three identical single frames combined in a triangular structure, with each frame continuously wound from high-quality cold-rolled silicon steel strips. The strip width is cut straight or curved by a CNC machine. High-voltage and low-voltage windings are wound directly on the core columns using a special winding machine, resulting in a solid and compact overall structure.

Product Features

  • The three-phase three-limb symmetrical structure provides the most balanced three-phase magnetic circuit, with completely symmetrical magnetic circuits of equal and shortest length. The three-phase no-load current is completely balanced, eliminating third harmonics and ensuring the quality of the power supply waveform. Due to the excellent core material and winding process, not only the no-load loss is small, but also the no-load current and noise are significantly reduced.
  • The transformer body is in the shape of a three-dimensional triangular prism, with tension rods installed in the center and periphery. It is integrated with the upper and lower iron yokes and laminated wood, effectively resisting axial and radial mechanical stress during sudden short circuits.
  • The transformer features a compact structure, small footprint, saving installation space, and convenient installation and maintenance.

Technical Parameters

Rated Capacity(kVA)Voltage Combination and Tapping Range(kV)ConnectionSymbolNo-Load Losses(W)Load Losses(W)No-Load Current(%)Short-circuit Impedance(%)

HVTapping Range (%)LV




306 / 6.3 / 10 / 1.5 / 11±50.4Dyn11 / Yzn11 / Yyn080630/6000.304.0
50


100910/8700.24
63


1101090/10400.23
80


1301310/12500.22
100


1501580/15000.21
125


1701890/18000.20
160


2002310/22000.19
200


2402730/26000.18
250


2903200/30500.17
315


3403830/36500.16
400


4104520/43000.16
500


4805410/51500.16
630


57062000.15
800


70075000.15
1000


830103000.14
1250


970120000.13
1600


1170145000.124.5
Notes:
  1. For transformers with a rated capacity of 500kVA and below, the load loss values above the diagonal line apply to Dyn11/Yzn11 connection groups, and those below the diagonal line apply to Yyn0 connection groups.
  2. According to customer needs, we can provide other high-voltage tapping ranges of ±2×2.5%.
  3. According to customer needs, we can provide transformers with a low voltage of 0.69kV.
  4. If the user has other needs, they can choose other loss values.

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