SB08 - Toroidal cross-link transformer
SB08 - Toroidal cross-link transformer

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Manufacturer: ELEQ

SB08 - Toroidal cross-link transformer

The SB08 pass-through current transformer can be used in measurement, protection, and energy metering applications. The product has a bore diameter matched to cables used in enclosed high-voltage switchgear and power transformers. The transformer design allows use in oil insulation environments (up to 105°C), air, nitrogen, and SF6. On request, the product can be equipped with a compensating winding, which protects the measurement from the influence of strong external magnetic fields originating, for example, from large currents flowing in adjacent phases. The transformer can be used independently or as a component of a larger device. More information on this topic is available in the component brochure.



Rated Data

Operating Environment Transformer oil (up to 105°C), air, nitrogen, SF6
Standard IEC61869-2, IEEE C57.13,
CAN/CSA-C60044-1-07,
AS60044.1 and others on request
Rated Primary Current (I1) 30….30000A
Rated Secondary Current (I2) 1.5A and others on request
Rated Burden According to customer requirements
e.g., 2.5, 5, 10, 15, 30VA
Accuracy Class According to customer requirements
e.g., 0.2S, 5P20, PX, TPY, C800
Rated Short-Time Thermal Current 100 x I1, max. 125kA
Rated Insulation Level 0.72/3/-kV
Rated Frequency According to customer requirements
e.g., 50-60Hz, 16.7Hz
Secondary Wires 4 or 6mm², l = 1.5m color-coded
Minimum Inner Diameter ≥ 50mm
Maximum Allowable Outer Diameter ≤ 1800mm
Maximum Allowable Height ≤ 750mm
Maximum Weight ≤ 600kg



Illustrative Sketch

SB08 – Toroidal Pass-Through Current Transformer

SB08 – Toroidal Pass-Through Current Transformer

SB08 – Toroidal Pass-Through Current Transformer

Discover the SB08 toroidal current transformer, ideal for current measurement, protection systems, and energy metering applications. The product features high measurement accuracy and a design that allows seamless integration with existing power installations.

The SB08 transformer has a bore diameter matched to standard conductors used in enclosed high-voltage switchgear and power transformers, facilitating installation in industrial systems. The device design allows operation in various insulating environments depending on the version: oil (up to 105°C), air, or gas (e.g., SF₆ or nitrogen).

Advantages and Features of the SB08 Transformer

  • The toroidal design allows the conductor to pass through the center of the transformer without interrupting the circuit.
  • Capable of operation in insulating environments suitable for the product version (oil, air, gas).
  • In selected variants, a compensating winding is available, minimizing the influence of external magnetic fields.
  • High measurement accuracy (accuracy class depends on the version), suitable for cooperation with protective relays and automation systems.
  • The product can comply with EU standards and safety regulations — details depend on the specific variant.

Example Applications

  • Measurement and energy monitoring systems in MV/LV substations.
  • Integration with automation circuits and protective relays.
  • Integration in switchgear and power transformers requiring high reliability and safety.
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The SB08 pass-through current transformer can be used in measurement, protection, and energy metering applications. The product has a bore diameter matched to cables used in enclosed high-voltage switchgear and power transformers. The transformer design allows use in oil insulation environments (up to 105°C), air, nitrogen, and SF6. On request, the product can be equipped with a compensating winding, which protects the measurement from the influence of strong external magnetic fields originating, for example, from large currents flowing in adjacent phases. The transformer can be used independently or as a component of a larger device. More information on this topic is available in the component brochure.



Rated Data

Operating Environment Transformer oil (up to 105°C), air, nitrogen, SF6
Standard IEC61869-2, IEEE C57.13,
CAN/CSA-C60044-1-07,
AS60044.1 and others on request
Rated Primary Current (I1) 30….30000A
Rated Secondary Current (I2) 1.5A and others on request
Rated Burden According to customer requirements
e.g., 2.5, 5, 10, 15, 30VA
Accuracy Class According to customer requirements
e.g., 0.2S, 5P20, PX, TPY, C800
Rated Short-Time Thermal Current 100 x I1, max. 125kA
Rated Insulation Level 0.72/3/-kV
Rated Frequency According to customer requirements
e.g., 50-60Hz, 16.7Hz
Secondary Wires 4 or 6mm², l = 1.5m color-coded
Minimum Inner Diameter ≥ 50mm
Maximum Allowable Outer Diameter ≤ 1800mm
Maximum Allowable Height ≤ 750mm
Maximum Weight ≤ 600kg



Illustrative Sketch

SB08 – Toroidal Pass-Through Current Transformer

SB08 – Toroidal Pass-Through Current Transformer

SB08 – Toroidal Pass-Through Current Transformer

Discover the SB08 toroidal current transformer, ideal for current measurement, protection systems, and energy metering applications. The product features high measurement accuracy and a design that allows seamless integration with existing power installations.

The SB08 transformer has a bore diameter matched to standard conductors used in enclosed high-voltage switchgear and power transformers, facilitating installation in industrial systems. The device design allows operation in various insulating environments depending on the version: oil (up to 105°C), air, or gas (e.g., SF₆ or nitrogen).

Advantages and Features of the SB08 Transformer

  • The toroidal design allows the conductor to pass through the center of the transformer without interrupting the circuit.
  • Capable of operation in insulating environments suitable for the product version (oil, air, gas).
  • In selected variants, a compensating winding is available, minimizing the influence of external magnetic fields.
  • High measurement accuracy (accuracy class depends on the version), suitable for cooperation with protective relays and automation systems.
  • The product can comply with EU standards and safety regulations — details depend on the specific variant.

Example Applications

  • Measurement and energy monitoring systems in MV/LV substations.
  • Integration with automation circuits and protective relays.
  • Integration in switchgear and power transformers requiring high reliability and safety.
Less
Read more
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