Features: 35mm standard DIN rail installation, complying with standard DIN EN50022. 10 pole width, complying with Standards JB/T7121-1993. Can select the step motor impulse register of 6 digits (999999kWh) . Equipped with a polarity passive energy impulse output terminal, conforming to Standards IEC 62053-31 and DIN 43864. LED indicate separately the power state on each phase, the energy impulse signal and data communication state. Automatic detection for the load current flow direction and will be indicated by LED. Measure the active energy consumption in one direction on three phase, which is not related with the load current flow direction at all, complying with Standards IEC 62053-21. The short terminal cover is made with the transparent PC, to reduce the installation space and is convenient for centralized installation. Specifications: Model: XTM1250S Accuracy: Class 1 Voltage: 3x220V/380V Current: 5(30)A, 20(80)A, 10(40)A (Optional) Insulation performance: AC voltage 4kv for 1 minute,1.2/50us waveform impulse voltage 6kv Size: 12.5 x 8.7cm / 4.92 x 3.43in Weight: 520g Package included: 1 x DIN-Rail Electric Meter 1 x Manual 1、35mm standard DIN rail installation, complying with standard DIN EN50022. 2、10 pole width, complying with Standards JB/T7121-1993. 3、Can select the step motor impulse register of 6 digits (999999kWh) . 4、Equipped with a polarity passive energy impulse output terminal, conforming to Standards IEC 62053-31 and DIN 43864. 5、LED indicate separately the power state on each phase, the energy impulse signal and data communication state.