Analog input module 3BSE081637R1


External connections:
• Excitation current to the load cells
• 2 or 4 analog inputs for load cell signals
• 4 analog outputs, voltage or current
• 8 digital inputs for control signals
• 8 digital outputs
• +24 V supply for external units, max 0.5 A
• Ethernet connection
• Service and multiple control units
• 2 serial interfaces of type RS-232 for
external displays, control, etc.

Model: 3BSE081637R1

Category: SKU: 3BSE081637R1 Tag:
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Analog input module 3BSE081637R1

Analog input module 3BSE081637R1


The remanence in the current transformer core can cause unwanted operations or minor additional time delays for some protection functions. As unwanted operations are not acceptable at all maximum remanence has been considered for fault cases critical for the security, for example, faults in reverse direction and external faults.

Because of the almost negligible risk of additional time delays and the non-existent risk of failure to operate the remanence have not been considered for the dependability cases.

The requirements below are therefore fully valid for all normal applications. It is difficult to give general recommendations for additional margins for remanence to avoid the minor risk of an additional time delay. They depend on the performance and economy requirements. When current transformers of low remanence type (for example, TPY, PR) are used, normally no additional margin is needed.

For current transformers of high remanence type (for example, P, PX, TPX) the small probability of fully asymmetrical faults, together with high remanence in the same direction as the flux generated by the fault, has to be kept in mind at the decision of an additional margin.

Fully asymmetrical fault current will be achieved when the fault occurs at approximately zero voltage (0°). Investigations have shown that 95% of the faults in the network will occur when the voltage is between 40° and 90°. In addition fully asymmetrical fault current will not exist in all phases at the same time.



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