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USER MANUAL

DEMONSTRATION BOARD

DB-1

SONEL S. A.

Wokulskiego 11

58- 100 Świdnica

Poland

Version 12.0 03.07.2023

DB- USER MANUAL 1 –

CONTENTS

1 Safety ................................................................................................................ 4

2 Application 5 .......................................................................................................

3 The front panel ................................................................................................. 6

3.1 Arrangement of sockets and switches ..................................................................... 6

3.2 Position of switches . 7 ................................................................................................

4 Measurements .................................................................................................. 8

4.1 Measurement of the short circuit loop impedance ................................................... 8

4.1.1 Measurement of the short circuit loop impedance in the L-PE circuit 8 ................................

4.1.2 Measurement of the short circuit loop impedance in the L-N circuit ................................. 10

4.2 Measurement of the parameters of the RCD switch .............................................. 11

4.2.1 Realisation of measurements of the RCD switch parameters ......................................... 11

4.3 Measurements of the earth resistance ................................................................... 13

4.3.1 Measurement of the earth electrode resistance using meters of the MRU series ............ 14

a. Earth resistance measurement RE .............................................................................. 14

b. Earth resistance measurement RE1 ............................................................................. 14

c. Earth resistance measurement R

E2 by means of the technical method ....................... 15

d. Earth resistance measurement RE2 by means of the technical method using current

clamp .......................................................................................................................... 15

e. Earth resistance measurement RE2 by means of the two-clamp method ..................... 16

4.3.2 Measurement of the earth resistance using loop impedance meters ............................... 16

a. Earth resistance measurement RE .............................................................................. 16

b. Earth resistance measurement R

E1 ............................................................................. 17

c. Earth resistance measurement R

E2 ............................................................................. 17

4.4 Earth resistivity measurements .............................................................................. 18

4.5 Measurements of the continuity of equipotential bondings .................................... 19

4.5.1 Measurement of the resistance of the equipotential bonding between P1 and P2 ........... 19

4.5.2 Measurement of the resistance of equipotential bonding between P1 and P3 ................. 19

4.6 Insulation resistance measurement ....................................................................... 20

4.6.1 Insulation resistance measurements in the L-N circuit ....................................................20

4.6.2 Insulation resistance measurements in the L-PE circuits ................................................21

5 Replacement of fuses .................................................................................... 21

6 Cleaning and maintenance ........................................................................... 22

7 Dismantling and disposal ............................................................................. 22

8 Technical specications ............................................................................... 22

9 Manufacturer .................................................................................................. 22

DB- USER MANUAL 1 –

1 Safety

The DB-1 demonstration board has been designed for the purpose of simulation of measurements,

whose results determine the safety conditions of a virtual installation. Therefore, in order to guarantee ap-

propriate operation and correctness of the obtained results, the following recommendations must be fol-

lowed:

 Before you proceed to operate the device read thoroughly the present manual and observe the safe-

ty regulations and instructions specied by the manufacturer.

 The device has been designed for operation at the nominal voltage of 230 V 50 Hz.

 The device cannot be used in the grid and with other devices in special interiors, for example those

of a dangerous atmosphere regarding the risk of explosion or re.

 It is unacceptable to operate the following :

 a damaged device which is completely or partially out of order

 a device with damaged power cable insulation,

 a device stored for an excessive period of time in disadvantageous conditions (e.g. excessive

humidity). If the meter has been transferred from a cool to a warm environment of a high level of

relative humidity, do not perform the measurements until the meter has been warmed up to the

ambient temperature (approximately 30 minutes).

 a device with damaged housing .

 Before measurement of connection resistance or insulation resistance, make sure the measured ob-

ject has been disconnected from the power supply. Disconnect the power cable of the device from

the power supply contact and turn the RCD o.

 Repairs may be performed solely by an authorised service point. Before the device is connected to the

power supply network, make sure the power supply socket is equipped with a properly connected earth

pin. The board will not function if it is powered from a socket without an additional PE connection.

 The board is equipped with a protection constituted by two F 4A 250 V fuses (T 3,14A 250 V fuse are

acceptable). The fuses are located in the device power supply socket. Should the fuse elements be

damaged, they must be replaced.

 It is unacceptable to use other fuses.

WARNING

 The DB-1 demonstration board may be used solely by qualied personnel who

have appropriate certicates that entitle them to work on electric installations, or

by persons working under their supervision. Using the board by unauthorised per-

sonnel or without supervision of such personnel may cause damage of the device

and be a source of a serious danger for the user.

 Before the fuses are replaced, the device must be disconnected from the 230 V

power supply network.

NOTE!

 Before you proceed to operate the device, read thoroughly the present manual and ob-

serve the safety regulations and instructions specied by the manufacturer.

 The demonstration board has been designed for the purpose of simulation measure-

ments of alternating voltage, impedance, short circuit, earth resistance, parameters of

the RCD switch, ground resistivity, insulation resistance, resistance of equipotential

bondings. Any application that differs from those specified in the present manual may

cause damage of the device and be a source of a serious danger for the user.

 Before and during measurements of ground resistivity, insulation resistance, resistance

of equipotential bondings, earth resistance (by means of the technical methods) discon-

nect the power cable of the device from the power supply socket and turn the RCD

switch off. The power supply of the board is signalled by the „POWER ON” diode.

DB- USER MANUAL 1 –

2 Application

The DB-1 demonstration board is an indispensable element of training courses regarding reali-

sation of electric measurements. It may be applied in schools, distribution centres of meters used in

the power industry as well as in training centres.

The board may be used for the purpose of simulation of the following measurements:

 measurement of the short circuit loop impedance in the L-N circuit for the TT and TN networks,

 measurement of the short circuit loop impedance in the L-PE circuit for the TT and TN net-

works,

 measurement of the parameters of the RCD switch type AC,

 insulation resistance measurement in the L-N circuit,

 insulation resistance measurement in the L-PE circuit,

 measurement of the earth resistance by means of the technical method,

 earth resistance measurement using clamps,

 earth resistance measurement by means of the two-clamp method,

 earth resistance measurements by means of the impulse method,

 earth resistance measurements using meters for short-circuit loop measurements,

 resistivity measurements of three kinds of ground,

 measurement of the resistance of equipotential bondings,

 measurement of alternating voltage.

The demonstration board makes it possible to cause irregularities in the installation under scrutiny.

This is possible thanks to the panel switches.

Termékspecifikációk

Márka:	Sonel
Kategória:	nincs kategorizálva
Modell:	DB-1

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