Bender RCMA426H Manuel utilisateur

Manual

RCMA426H

Residual current monitor

for monitoring AC, DC and pulsed DC currents

in earthed and resistance earthed systems

Software version D309 V1.0x

RCMA426_D00065_00_M_XXEN/05.2014

©Bender GmbH & Co. KG

Reprinting only with permission

of the publisher.

Subject to change!

Bender GmbH & Co. KG

P.O. Box 1161 • 35301 Gruenberg • Germany

Londorfer Str. 65 • 35305 Gruenberg • Germany

Tel.: +49 6401 807-0

Fax: +49 6401 807-259

E-Mail: [email protected]

Web: http://www.bender.de

Table of Contents

RCMA426_D00065_00_M_XXEN/05.2014

1. Effective use of this manual ........................................................................... 5

1.1 Notes for the user ............................................................................................. 5

1.2 Intended use ...................................................................................................... 5

2. Safety instructions ........................................................................................... 7

2.1 General safety instructions ........................................................................... 7

2.2 Work activities on electrical installations ................................................ 7

3. Function ............................................................................................................. 9

3.1 Device features ................................................................................................. 9

3.2 Function ............................................................................................................... 9

3.2.1 Transformer monitoring ............................................................................. 10

3.2.2 Quick query of the rated residual operating current ....................... 10

3.2.3 Self test, automatic ....................................................................................... 11

3.2.4 Self test, manual ............................................................................................ 11

3.2.5 Functional faults ............................................................................................ 11

3.2.6 Password protection (on, OFF) ................................................................. 11

3.2.7 Factory setting FAC ...................................................................................... 12

3.2.8 Erasable history memory HiS .................................................................... 12

4. Installation and connection ......................................................................... 13

4.1 Dimension diagrams .................................................................................... 13

4.2 Factory setting ............................................................................................... 15

4.3 Commissioning .............................................................................................. 15

5. Operation and configuration ....................................................................... 17

5.1 Getting to know the user interface ......................................................... 17

5.2 Understanding information on the standard display ...................... 18

5.3 Getting to know buttons and button functions ................................ 19

5.4 Starting a manual self test ......................................................................... 20

Table of Contents

4RCMA426_D00065_00_M_XXEN/05.2014

5.5 Erasing the fault memory ........................................................................... 20

5.6 Calling up and exiting the menu ............................................................. 20

5.7 Making settings in the menu .................................................................... 21

5.7.1 Selecting menus ............................................................................................ 21

5.7.2 Querying the software version with the InF menu ........................... 22

5.7.3 Making settings in the SEt menu ............................................................. 22

5.7.4 Querying and erasing the fault memory in the HIS menu ............. 24

6. Technical data ................................................................................................ 27

6.1 Data RCMA426H-D-2 in table form ......................................................... 27

6.2 Error codes ....................................................................................................... 30

6.3 Recommended contactors ........................................................................ 31

6.4 Response times of the RCMA426H system plus contactor in ac-

cordance with UL943 ................................................................................... 32

6.5 Ordering information ................................................................................... 33

6.6 Standards, approvals and certifications ................................................ 33

INDEX .................................................................................................................... 35

RCMA426_D00065_00_M_XXEN/05.2014

1. Effective use of this manual

1.1 Notes for the user

This manual is intended for experts in electrical engineering and

electronics!

In order to make it easier for you to find specific text passages or references in

this manual and for reasons of comprehensibility, important information is

emphasised by symbols. The meaning of these symbols is explained below:

1.2 Intended use

The AC/DC sensitive residual current monitor RCMA426H with its measuring

current transformer WN-35BS is used to monitor earthed and resistive-

earthed systems (TN and TT systems) in which DC and AC fault currents may

occur. These systems involve loads with six-pulse bridge rectifiers or half-

wave rectifiers with smoothing, e.g. converters and chargers.

In the event of a rated residual operating current IΔnof 6 mA, the device will

switch an alarm relay and the associated contactor in accordance with the op-

erating time specified in UL943.

The warning symbol indicates a potential dangerous

situation that may result in bodily injury and/or damage

to property.

Observe the associated safety instructions.

Information intended to assist the user to make optimum

use of the product are marked with the Info symbol.

Effective use of this manual

6RCMA426_D00065_00_M_XXEN/05.2014

RCMA426_D00065_00_M_XXEN/05.2014

2. Safety instructions

2.1 General safety instructions

In addition to these operating instructions, the "Important safety instructions

for Bender products“, which are also included in the scope of supply, are an in-

tegral part of the device documentation.

2.2 Work activities on electrical installations

 Only skilled persons are permitted to carry out the work necessary to

install, commission and run a device or system.

 Compliance with applicable regulations governing work on electrical

installations, and with the regulations derived from and associated

with them, is mandatory. EN 50110 is of particular importance in this

regard.

 If the device is being used in a location outside the Federal Republic of

Germany, the applicable local standards and regulations must be com-

plied with. European standard EN 50110 can be used as a guide.

Failure to carry out work on electrical installations prop-

erly and correctly can put life and limb at risk!

Safety instructions

8RCMA426_D00065_00_M_XXEN/05.2014

RCMA426_D00065_00_M_XXEN/05.2014

3. Function

3.1 Device features

 AC/DC sensitive residual current monitor with external 35 mm

measuring current transformer

 Can be used in conjunction with a contactor

 Rated residual operating current IΔn= 6 mA acc. to UL943

 Operating time acc. to UL943

 r.m.s. value measurement, frequency range 0…150 Hz

 Measured value display via multi-functional LC display

 Alarm signalling via LEDs (TPD, ERR) and K2 changeover contact

 Password protection to prevent unauthorised changes being made to

device settings

 Permanent fault memory

 N/C operation of alarm relay

 Device test when the power supply voltage Usis connected

 Automatic self test every 24 h

 CT connection monitoring

 Internal test circuit acc. to UL943 without additional external

components

 Internal test and reset button

 N-PE conductor monitoring on the load side

3.2 Function

The RCMA426H runs a device test when the power supply voltage is connect-

ed. During the start-up phase, the TRP LED lights up, the alarm LED ERR flashes

and the alarm relay switches to the alarm setting.

Once the device test has been completed successfully, the ERR alarm LED will

stop flashing, the TPD LED will go out and the alarm relay will return to the

normal setting.

Function

10 RCMA426_D00065_00_M_XXEN/05.2014

The device will check the circuit for the presence of residual currents even dur-

ing the self test.

An internal measuring current transformer is used for residual current meas-

urement. The actual measured value is indicated on the LC display. If the rated

residual operating current of 6 mA is exceeded, the alarm relay K2 will change

to the alarm state and the TRP alarm LED will light up.

Once the alarm relay has switched, the residual current must fall to less than

the rated residual operating current.

If it does not, error code E.04 will appear on the display and the ERR alarm LED

will flash. This means that the connected contactor has not shut down the

faulty circuit.

If the residual current falls below the release value, the error will continue to

be signalled due to the permanently activated fault memory. The alarm relay

K2 will not switch back to the initial state and the TRP alarm LED will not go

out until the reset button R is pressed or the power supply voltage is interrupt-

ed.

Parameters are assigned to the device via the LC display and the control but-

tons on the front panel; this function can be password-protected.

3.2.1 Transformer monitoring

The connections to the measuring current transformer are checked periodi-

cally every 10 s for short and open circuits. In the event of an error, the alarm

relay K2 will switch, the red TPD alarm LED will light up and the yellow ERR

alarm LED will flash (error codes E.01 or E.03). Once the error has been elimi-

nated, the alarm LEDs and the alarm relay will remain in the alarm state. Press-

ing the reset button R, the K2 will switch back to its initial state and the alarm

LEDs will go out.

3.2.2 Quick query of the rated residual operating current

When the display is in standard mode, the rated residual operating current IΔn

= 6 mA can be queried by pressing the Up or Down button

(< 1.5 s). Switching to menu mode is not necessary. Quick query mode can be

exited by pressing Enter (< 1.5 s).

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