21.2.5.2 Design
The transformer module has 12 input transformers. There are several versions of the
module, each with a different combination of voltage and current input transformers.
Basic versions:
• 6 current channels and 6 voltage channels
• 7 current channels and 5 voltage channels
• 9 current channels and 3 voltage channels
• 12 current channels
• 6 current channels
The rated values and channel type, measurement or protection, of the current inputs
are selected at order.
Transformer input module for measuring should not be used with
current transformers intended for protection purposes, due to
limitations in overload characteristics.
The TRM is connected to the ADM and NUM.
For configuration of the input and output signals, refer to section
"Signal matrix for
analog inputs SMAI".
Section 21 1MRK502052-UEN B
IED hardware
1152
Technical manual
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