The device provided with protective
conductor connection (shock-proof plug).
P ctive cto resistan ce
Resistance between conductive part connected the protective conductor for protective reasons
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. According to
the German technical guideline for operational safety "Competent persons specific requirements
- electrical hazards" (TRBS 1203, Part 3), the competent person must have finished electro
technical vocational education must have another similar electrotechnical qualification suitable
for the testing portable electrical equipment ensure protection against electrical hazards. The
term professional experience means that the person has least one year experience regarding
the installation, assembly maintenance electrical equipment and/or systems.
D evices ith ctio ctio class II)
Active parts are isolated means reinforced double insulation (basic insulation and additional
insulation). Moreover, the electrotechnically trained person has been
instructed with regard the required protection equipment and protective measures. Tech nical Term s
P ctive easures
The test procedure based the existing protective measure the test sample for which the
efficacy the respective accessible conductive has proven. Thus, the device protected against direct contact.BENNING BENNING 750 A
19. The device might also have accessible
conductive parts which are not connected the protective conductor.
D ifferential rre t
Vectorial sum all current flowing via the active conductors the input (connection) the mains
side
P ctive cto rre t
Sum the currents flowing through the protective conductor devices protection class the
bodies those devices are insulated earth
L rre t
Current flowing earth external conductive part via the faultless insulation device
Fault current
Current flowing earth external conductive part via the faulty insulation device
A lte tiv leak current
Current which would flow through the active conductors test sample and the protective conduc
tor the accessible conductive parts nominal voltage nominal frequency the test sample. connecting the accessible
conductive parts the housing the protective conductor, these parts are included the protec
tive measures the system concerning direct contact (fault protection).
C rre t
If someone touches parts body electrical equipment (device) that are not connected to
the protective conductor, the contact current the current flowing earth via the person touching
the device. The device also protected against
indirect contact, because insulation fault all but impossible.
D evices safe extra -lo ltag circu its tectio clas III)
Devices protection class III are connected safety extra-low voltage circuits (SELV PELV)
only. Note: Only the
insulating resistance between the active parts and the accessible conductive parts measured.
19.1 Tech nical Term acco DIN 0701 -0702
R ir
Measures taken restore the nominal condition the technical means system
M odification
Intervention the device which admissible according the manufacturer's specifications
Q alified electrician
A qualified electrician someone who able evaluate the tasks assigned him/her due his/
her professional education, knowledge and experience well the knowledge the relevant
provisions and who able recognize possible dangers. The fault current detected
by means the protective conductor current measurement.
Note: Please observe the test circuits!
Insulating resistan ce
Ohmic resistance the insulation (insulating materials) between conductive parts. However, such devices might be
provided with accessible conductive metal housing parts.
Test
The test comprises measures for determining and evaluating the actual condition regarding the
safety the device. For the intended
testing portable electrical equipment, the competent person must have the required detailed
knowledge electrical engineering well the relevant electrotechnical regulations and must
regularly update this knowledge. Protection against dangerous shock current ensured the low voltage and safe isolation
regarding other circuits.
E lec tro tech ally train person
An electrotechnically trained person someone who has been informed and instructed (if neces
sary) the qualified electrician regarding the tasks assigned him/her and regarding possible
dangers case improper behaviour. For the BENNING 750 A
Appliance Tester, the following classification has been made:
D evices ith ctio ctio class I)
The active parts the device are protected against direct contact. The fault current additional
ly detected means the contact current measurement. Devices protection class are equip
ped with mains plug without protective conductor. These demands show that safety-related evaluation portable
electrical equipment basically requires the attributes qualified electrician.
C person
In terms the German Health and Safety Work Regulation, competent person someone
who has the required expert knowledge for the testing electrical equipment due his/her vo
cational education, professional experience and contemporary occupational activity.
P erio inspection
A periodic inspection test which carried out certain time intervals and which intended for
proving the electrical safety
