Bender LINETRAXX MRCDB423 Посібник - Сторінка 5

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1.9

Safety

If the device is used outside the Federal Republic of Germany, the applicable local standards and

regulations must be complied with. In Europe, the European standard EN 50110 applies.

! Risk of electrocution due to electric shock! Touching live parts of the system

anger

carries the risk of:

- A fatal electric shock

- Damage to the electrical installation

- Destruction of the device

Before installing and connecting the device, make sure that the installation has been de-

energised. The rules for working on electrical systems must be observed.

1.10 Intended use

The AC/DC sensitive MRCDB423 with the corresponding CTUB101-CTBC... measuring current

transformers and a circuit breaker according to IEC 60947-2 are used as additional protection

(protection against indirect contact) in earthed systems (TN and TT systems) in which AC or DC

fault currents may occur. Part of these systems are in particular loads with six-pulse rectifiers or

one-way rectifiers with smoothing, such as converters, battery chargers, construction site equip-

ment with frequency-controlled drives.

Since the values are measured with measuring current transformers, the MRCDB423 is almost in-

dependent of the nominal voltage and the operating current of the monitored system.

The response value I

are shown on the standard display.

Connection voltages and technical requirements for operating the device are specified in the

technical data. Any other use of the device than that described in this document is regarded as

improper.

Information on factory settings

How to reset the MRCDB423 to the factory settings is described in section 5.5 on page 12.

For a list of the factory settings, refer to section „5.6 Setting ranges and factory settings"

on page 12.

, the response delay t

Δn2

as well as the currently measured residual current

on2

MRCDB423_D00396_01_M_XXEN/06.2021

LINETRAXX® MRCDB423