With the clamp on current transformers AD-KSW50, AD-KSW100, AD-KSW200, AD-KSW400 and AD-KSW600 high currents can be measured without contact in connection with the power measurement devices from the Adamczewski GmbH. There are transformers for the range up to 600 A AC available. By their small size they can be easily mounted on the current carrying conductors and can therefore be mounted easily to existing systems without disconnecting the main cable. The secondary side mA-currents are not critical and can be wired over several meters. By the internal voltage limitation there are no high voltages on the secondary side possible.



Measurement of high currents, power or energy in plants or buildings in connection with the measurement technology from the Adamczewski GmbH.

Specific characteristics

  • non-contact measurement of high currents
  • no disconnection of the main cable during installation
  • uncritical mA-signals at the secondary side of the transformer

Business data

Order number
AD-KSW 50 SO 50 A AC primary current
AD-KSW 100 SO 100 A AC primary current
AD-KSW 200 SO 200 A AC primary current
AD-KSW 400 SO 400 A AC primary current
AD-KSW 600 SO 600 A AC primary current
Power measurement transducer
AD-LU 25 GT Power measurement transducer
Compatible transducer
AD-LU 35 GT Power measurement transducer
AD-LU 55 GT Power measurement transducer
AD-LU 680 GA Power measurement transducer
Customs tariff number / country of origin 8504 31 29 / Deutschland


Data sheet pdf en-kswxxso.pdf (256 kB)
Tender text zip (15 kB)
Safety instructions pdf ad-safety-instructions.pdf (43 kB)

Technical specifications

Max. primary conductor diameter
AD-KSW50 23 mm
AD-KSW100 23 mm
AD-KSW200 23 mm
AD-KSW400 35 mm
AD-KSW600 35 mm
Primary current
AD-KSW50 0 ... 50 A AC
AD-KSW100 0 ... 100 A AC
AD-KSW200 0 ... 200 A AC
AD-KSW400 0 ... 400 A AC
AD-KSW600 0 ... 600 A AC
Secondary current
All transformer types 0 ... 33 mA AC
Nominal load
All transformer types 7 Ohm
AD-KSW50 34,4 x 45 x 65,5 mm
AD-KSW100 34,4 x 45 x 65,5 mm
AD-KSW200 34,4 x 45 x 65,5 mm
AD-KSW400 38,4 x 57 x 81,5 mm
AD-KSW600 38,4 x 57 x 81,5 mm
AD-KSW50 Ca. 180 g
AD-KSW100 Ca. 180 g
AD-KSW200 Ca. 180 g
AD-KSW400 Ca. 350 g
AD-KSW600 Ca. 350 g
All transformer types < 0,5 %
Phase error
All transformer types 1° (primary to secondary)
Secundary wires
Connections White: k, black: l
Cable length Ca. 50 cm
Frequency range
All transformer types 50 ... 400 Hz
Rated frequency
All transformer types 50 / 60 Hz
All transformer types 2500 V AC (1 min) + cable insulation
Environmental conditions
Operation -10 ... 60 °C
Storage and transport -20 ... 70 °C (no condensation)
All transformer types CE, UL, RoHS

Block and wiring diagram




CAD / CAE Daten

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