## General

The SmartMeter² variants 1182-85 and 1182-800 differ in practical use only by the current transformers used.
Therefore, it is important to configure the *Transformer type* correctly to ensure proper operation.

Transformer type: This setting must match the variant in use.
For current transformers from other manufacturers, *Manual* must be selected.
Current transformers with a secondary current above 58 mA must not be connected directly.
When using standard 1 A or 5 A current transformers, an additional measuring transducer must be used to reduce the secondary current to max. 58 mA.
In this case, the output current of the complete measurement chain must also be entered in the I-secondary field.
Example: For a 2000 A:5 A current transformer + 5 A:20 mA measuring transducer, enter 2000 A for I-primary and 20 mA for I-secondary.

**Caution**: Only transformers with a secondary current of no more than 58 mA may be used.
Connecting transformers with a higher secondary current will damage the SmartMeter².

TN or IT system: When using the smart meter in a system with a neutral conductor, the TN system parameter must be selected.
With this setting, the 3 phases and the neutral conductor must be connected to the smart meter.
This is the standard in the EU.
IT systems do not have a neutral conductor.
In this case, only the 3 phases must be connected and the IT system parameter must be selected.
The neutral conductor terminal remains unused.

The mains frequency can be set to 50 Hz or 60 Hz to match the installation.

The current direction of each phase can be inverted, for example to correct a reversed current transformer connection in software.

The *Telegram rate limit* limits the number of telegrams sent by the device per second.
The *Delay after device start* can be used to deliberately postpone transmission after a restart.

The input communication objects can receive the date, time, or date and time from the bus.
If *Request date / time on device restart* is enabled, the device sends a request telegram after restarting.
Its polarity can be configured.

The data types for energy, voltage and current can be defined here globally for all objects of the device.

For active power measurement, additional unsigned objects for generation and consumption can also be enabled.
