Bender LINETRAXX MRCDB423 Manual - Page 10

Browse online or download pdf Manual for Control Unit Bender LINETRAXX MRCDB423. Bender LINETRAXX MRCDB423 20 pages. Modular residual current device type b for additional protection (protection against indirect contact) in earthed systems (tn and tt systems)

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Connection

! Risk of fatal injury due to electric shock! Touching live system parts can result

anger

in fatal injuries. Ensure that there is no voltage in the installation area and follow the

rules for working on electrical equipment.

Terminal

A1, A2

T/R

11, 12, 14

21, 22, 24

To comply with IEC 60947-2 Annex M, the MRCDB423 must be operated according to the N/C

principle in combination with a circuit breaker with undervoltage release or shunt trip. The

circuit breaker must be able to switch off in less than 17 ms and comply with the IEC 60947-2

standard.

! An electric shock caused by excessively high fault currents can result in serious

arning

injuries or death.

must only be used in switching applications!

tic offset measurement is carried out, which takes an existing fault current as the basis for the

calibration. This may cause the protection to fail because the system does not switch off if the

fault current is too high.

MRCDB423_D00396_01_M_XXEN/06.2021

> U

CTBCx

CTUB101

Connections

Connection to supply voltage U

Socket for connection cable of measuring current transformer

Connection for a combined external test and reset button

Output relay K1 (alarm)

Output relay K2

The MRCDB423 device must not be operated without a circuit breaker and

S1(k) S2(l)

+12V

GND

-12V T

CTX...

After the output relay K2 switches off, an automa-

F 6A

MRCDB423