SADTEM SW44 AR 140871-10

SADTEM SW44 Medium-Voltage Current Transformer

Description

This is a SADTEM SW44, a high-quality cast-resin current transformer designed for indoor use in medium-voltage switchgear and control panels. It provides reliable and accurate current transformation for metering, instrumentation, and protective relaying applications. Manufactured in France, this transformer adheres to strict IEC standards, ensuring safety and performance.

Specifications

• Manufacturer: SADTEM
• Type: SW44
• Part Number: AR 140871-10
• Primary Current (Ipn): 400A
• Secondary Current (Isn): 5A
• Ratio: 400/5A
• Burden: 30VA
• Protection Class: 10P5
• Maximum System Voltage (Um): 7.2 kV
• Power-Frequency Withstand Voltage: 20 kV
• Lightning Impulse Withstand Voltage: 60 kV
• Frequency: 50 Hz
• Insulation Class: E
• Standard: IEC 60044-1

Label Info

• Serial Number: 481512
• Year of Manufacture: 2012

Application

Ideal for integration into new or existing medium-voltage (MV) electrical distribution systems, including metal-clad switchgear, motor control centers, and generator protection circuits. Its precision is vital for accurate energy billing and effective fault detection.

Country of Origin

Made in France.

CO2 Impact

Choosing this pre-owned transformer saves an estimated 59 kg of CO2 compared to manufacturing a new one. This saving is equivalent to the emissions from driving a car for 295 km.

Availability

This item is in stock and ready for immediate dispatch. Order now from spareparts2day for expert support and fast delivery.

FAQ

Question?

What is the significance of the 10P5 accuracy class?

The ’10P5′ designation is a protection class according to IEC standards. ’10P’ means the composite error is less than 10 percent at the accuracy limit primary current. The ‘5’ indicates the accuracy limit factor (ALF), meaning the transformer maintains this accuracy up to 5 times the rated primary current. This is crucial for protective relays to operate correctly during fault conditions.

Question?

Can this 50Hz transformer be used on a 60Hz system?

While it might function, it is not recommended. A transformer designed for 50Hz used on a 60Hz system may exhibit changes in performance, including higher core losses and potential saturation issues, affecting its accuracy. For critical measurement and protection applications, you should always use a transformer rated for the specific system frequency.

Question?

What are the routine maintenance requirements for a cast-resin transformer like this?

Cast-resin transformers are virtually maintenance-free. However, periodic inspection is recommended. This includes checking for dust and contamination on the surface, which should be cleaned with a dry, lint-free cloth to prevent tracking. Also, verify that the primary and secondary connections are tight and show no signs of overheating or corrosion.

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Last Update: Friday, March 13, 2026