Additional equipment, The external transformer is required for the earth fault protection function., a) for the neutral conductor on 3-pole switches, b) for direct measurement of the earth fault current at the earthed star point on 3 or 4-pole switches., Pole 3, can be used for IZMX-DTV-G, +IZMX-DTV-G, +IZMX-DTV-GZ, +IZMX-DTU-A, IZMX-DTU-A, +IZMX-DTU-AZ, +IZMX-DTU-G, IZMX-DTU-G, +IZMX-DTU-AM, IZMX-DTU-AM, +IZMX-DTU-AMZ, IZMX-DTU-GMZ, IZMX-DTU-GM, +IZMX-DTU-GM, +IZMX-DTU-GZ, IZMX-DTP-G, IZMX-DTP-G, +IZMX-DTP-GZ, +IZMX-DTP-GM, +IZMX-DTP-GMZ, IZMX-DTP
| Property | Value |
| With touch protection: | no |
| Design: | Winding current transformer |
| Primary rated current In: | 4000 A |
| Snap-on fastening: | no |
| Number of primary inputs: | 1 |
| With copper bar: | yes |
