How to minimize the error of measure when we use a Telefast ABE7-CPA02/31 with analog modules?

When we use a Telefast ABE7-CPA02/31 with analog modules to wire the current sensors we must pay attention to the resistance of the wires.
To avoid to be affected by these resistance the voltage measure must be made as close as possible to the 250 ohms shunt resistor.
Therefore, when the shunt 250 ohms resistors are inside the analog module, the wiring of the voltage inputs onto the current inputs mustn't be done on the Telefast but directly on the terminal blocks on side of the analog module.
(example: see attachment)

Publié pour: Schneider Electric Belgium