ABB 3BSE00494R1 Measuring Board SDCS-PIN-51

3BSE00494R1 SDCS-PIN-51 board is always used together with the SDCS-PIN-41 board. On this board, there are the circuits needed for current, voltage, and temperature measuring and for hardware coding.

The current is measured by current transformers at the main AC inputs, rectified by a diode bridge, and scaled with burden resistors. The nominal current is adjusted by cutting out resistors (R1 ... R21) from the board according to the current coding table. The resistors R22 ... R26 are used for the current equal to zero detection. These resistors must be cut off,ff too, according to the current coding table.

Voltages (U1, V1, W1 and C1(+) and D1(-)) are measured by ushigh-ohm ohm resistor chains. Scaling of AC and DC voltage is done by activating 1 MΩ resistors (= cutting out short circuit wires, which are represented by low ohmic resistors).

The voltage measurement uses 5 resistors:

U1:W1 to W5

V1:W6 to W11

W1:W12 to W16

C1(+):W17 to W21

D1(-):W22 to W26

If there is a need for voltage adaptation, all 5 chains must be handled in the same way.

Note! Actual voltage signals U1, V1, W1, C1(+), and D1(-) of the main circuit are not galvanically isolated from the control board. Because of that, a current of less than 1 mA will flow to earth. When a galvanically isolated measurement is needed, please contact your ABB representative..

Warranty: 12 months.

3-5 working days.

T/T.

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