DI821 3BSE008550R1 ABB Digital input module 8-channel 230V

Description

DI821 3BSE008550R1 Check whether the primary equipment wiring is correct. Confirm whether the REF 542plus connector is correctly inserted and tightened.
Note: When the primary equipment is at an undefined position, the opening command sent by DI821 3BSE008550R1 will activate the opening of the circuit breaker
Coil. Opening operation will not be blocked. Closing operation of equipment at undefined position is blocked. close
The brake command will be ignored, and the interlocking error LED will light up.
The REF 542plus can have up to 8 analog input channels. These inputs can be divided into 3 measurement groups:
*Measurement group 1: channel 1, channel 2, channel 3
*Measurement group 2: channel 4, channel 5, channel 6
*Measurement group 3: channel 7, channel 8
Group 1 and Group 2 must be of the same type, DI821 3BSE008550R1, which means that they can measure 3 currents or 3 electric currents at the same time
Press. For example, measuring 1 current and 2 voltages is not allowed.

Group 3 can measure any type of signal: 2 currents, 2 voltages, 1 current and 1 voltage, etc.
Group 1 and Group 2 can be used for measuring the current or voltage of the same type from instrument transformers and unconventional sensors
Measurement. Group 3 can be used in different ways.
Channels 7 and 8 in group 3 can be used for ground fault current, residual voltage, or
With VT or sensor input zero sequence voltage, synchronous detection function.
Input CT 0.2A is usually used together with ring core transformer for grounding with high sensitivity
Barrier current measurement.
Instrument current transformers can have a secondary winding ratio of/1A or/5A. It can be selected once with the operation tool
Nominal current (e.g. 400A). DI821 3BSE008550R1 automatically selects the secondary power according to the connection mode with the analog input module
Stream (e.g./5A).
Rogowsky coil can be used for current detection. Select the correct transformer for Rogowsky coil by operating the tool
Than. The resistance voltage divider can be used for voltage detection, and the winding ratio can be selected by operating tools. Actual condition of equipment
The input is the same for voltage and current sensing, and can be selected by operating tools. Therefore, the ratio of
If 6 Rogowsky coils, 6 voltage dividers, or 3 Rogowsky coils, 3 voltage dividers are used,
Yes.
To check which analog input module exists in the device, check the identification mark on the device body
Hardware identification submenu on the tag or HMI service page.
Now determine the pins of analog input module 1VCF750170R0817: 3 CTs, 3 VTs, 1
CT； It is used with a transformer with a secondary winding current of 1A.
The following connections must be made:
Analog input 1; The 1st phase current transformer must be connected to pins 11 and 3 (common).
Analog input 2; The 2nd phase current transformer must be connected to pins 22 and 14 (common).
Analog input 3; The 3rd phase current transformer must be connected to pins 10 and 2 (common).
Analog input 4; DI821 3BSE008,550R1 The first phase to ground voltage transformer must be connected to pins 21 and 17.
Analog input 5; The second phase to ground voltage transformer must be connected to pins 5 and 1.
Analog input 6; The third phase to ground voltage transformer must be connected to pins 23 and 19.
Analog input 7; The ring core transformer for zero sequence current must be connected to pins 24 and 16 (male
Common end).

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