Current- and voltage-measurement transducer

A transducer for measuring a current, comprising in combination:

• magnetic core means having a gap normally impeding passage of any magnetic flux, including a shell having first and second openings,
• coil means arranged to pass a premagnetizing current for producing a first magnetic field,
• loop means arranged to pass the current to be measured so as to produce a second magnetic field, said shell surrounding said coil means and said loop means,
• magnetic field comparison means exposed to said magnetic fields, said magnetic field comparison means including magnetic film means bridging said flux gap and being alternately driveable in respective opposite directions of saturation substantially by said first magnetic field, and evaluating and measuring current in dependence of said magnetic fields, and
• first and second pole members connected to said magnetic field comparison means on opposite ends thereof and received in said first and second openings, respectively in a play-free manner,
• said magnetic core means, said coil means, said loop means, and said magnetic field comparison means having a common axis, and being substantially disposed concentrically about said axis.

A transducer for measuring a current, comprising in combination:

• magnetic core means having a gap normally impeding passage of any magnetic flux, including first and second half shells forming a shell, said shell having first and second openings, each half-shell having a contact surface,
• coil means arranged to pass a premagnetizing current for producing a first magnetic field,
• loop means arranged to pass the current to be measured so as to produce a second magnetic field, said shell surrounding said coil means and said loop means, said magnetic fields producing a flux having a predetermined direction, said contact surfaces being disposed in said predetermined direction,
• magnetic field comparison means exposed to said magnetic fields, said magnetic field comparison means including magnetic film means bridging said flux gap and being alternately driveable in respective opposite directions of saturation substantially by said first magnetic field, and evaluating said measuring current in dependence of said magnetic fields,
• first and second pole members each having a substantially flat surface, connected to said magnetic field comparison means on opposite ends thereof and received in said first and second openings, respectively in a play-free manner, and
• a magnetically non-conductive material having an outer, substantially plane surface and connecting said pole members to one another, said magnetic field comparison means being disposed on said flat surfaces,
• said magnetic core means, said coil means, said loop means, and said magnetic field comparison means having a common axis, and being substantially disposed concentrically about said axis.