A current sensor comprising: a first lead and a second lead; a current sense coil disposed about a conductive lead, the current sense coil configured to sense a current passing through the conductive lead, the current sense coil including: a first outer coil configured to detect a first magnetic field generated by the current; a second outer coil configured to detect the first magnetic field, each of the first outer coil and the second outer coil includes a first balancing portion (670a, 690a) and a second balancing portion (670b, 690b); and an inner conductor disposed between the first outer coil and the second outer coil, the inner conductor configured to detect a second magnetic field generated by the current; characterised in that the second outer coil is configured to cancel an electric field induced in the first outer coil at least by: the first and second balancing portions (690a, 690b) of the second outer coil being wound in an opposite direction from that of the first and second balancing portions (670a, 670b) of the first outer coil; the first balancing portion of the first outer coil and the second balancing portion of the second outer coil being coupled to the first lead, and the second balancing portion of the first outer coil and the first balancing portion of the second outer coil being coupled to the second lead. a first lead and a second lead; a current sense coil disposed about a conductive lead, the current sense coil configured to sense a current passing through the conductive lead, the current sense coil including: a first outer coil configured to detect a first magnetic field generated by the current; a second outer coil configured to detect the first magnetic field, each of the first outer coil and the second outer coil includes a first balancing portion (670a, 690a) and a second balancing portion (670b, 690b); and an inner conductor disposed between the first outer coil and the second outer coil, the inner conductor configured to detect a second magnetic field generated by the current; a first outer coil configured to detect a first magnetic field generated by the current; a second outer coil configured to detect the first magnetic field, each of the first outer coil and the second outer coil includes a first balancing portion (670a, 690a) and a second balancing portion (670b, 690b); and an inner conductor disposed between the first outer coil and the second outer coil, the inner conductor configured to detect a second magnetic field generated by the current; characterised in that the second outer coil is configured to cancel an electric field induced in the first outer coil at least by: the first and second balancing portions (690a, 690b) of the second outer coil being wound in an opposite direction from that of the first and second balancing portions (670a, 670b) of the first outer coil; the first balancing portion of the first outer coil and the second balancing portion of the second outer coil being coupled to the first lead, and the second balancing portion of the first outer coil and the first balancing portion of the second outer coil being coupled to the second lead. the first and second balancing portions (690a, 690b) of the second outer coil being wound in an opposite direction from that of the first and second balancing portions (670a, 670b) of the first outer coil; the first balancing portion of the first outer coil and the second balancing portion of the second outer coil being coupled to the first lead, and the second balancing portion of the first outer coil and the first balancing portion of the second outer coil being coupled to the second lead.