Manual Testing; Terminology Used In Test Procedures - Benning ST 755+ Operating Manual

7.5.2

Manual testing

Manual testing is intended for tests of electrical devices after repair or modification and for
periodic testing [} page 77]. In the event of a fault on the test sample, a test after repair
(EN 50678, VDE 0701) must first be carried out before period testing (EN 50699, VDE 0702)
may be performed.
The following manual tests according to specific standards are available:
• VDE 0701, VDE 0702 (electrical devices)
• VDE 0751-1 (medical electrical devices)
• VDE 0544-4 (power sources for arc welding)
The device provides the following individual tests:
• R (protective conductor resistance)
PE
• R
Insu-1
• R
Insu-2
• R
Insu-3
• R
Insu-4
• I (protective conductor current)
PE
• I (contact current)
Cont
• I
Leak
• I
PLeak
• Funct. (functional test)
• Cable (continuity test)
• U (output voltage)
a
• PRCD (portable residual current protection device)
• U
a weld.
• I
Cont weld.
Depending on the test standard and protection class of the test sample, the device provides
preconfigured individual tests. Specification, selection and order of the individual tests are
determined by the responsible qualified electrician.
7.5.3

Terminology used in test procedures

The device provides two testing options: The "Automatic test" and the "Manual test". The
following chapter provides a brief insight into both testing options and an overview of the
terminology used.
Connection test
During the first measurement, the device checks whether a dangerous contact voltage or a
short-circuit is present and whether a test sample is connected. If the test has been passed, the
device proceeds with the visual inspection.
Polarity reversal time
The polarity reversal time is the delay time for mains pole reversal. It is used for test samples
with a delayed response characteristics, e. g. when testing devices with a defined start time.
Delay times from 0 to 60 000 ms are admissible.
The polarity reversal time remains active only for the duration of the test.
40
(insulating resistance LN-PE)
(insulating resistance sec.-PE)
(insulating resistance LN-sec.)
(insulating resistance LN-accessible parts without PE)
(leakage current for medical electrical devices)
(patient leakage current)
(voltage welding circuit)
(contact current welding circuit)
BENNING ST 755+ / ST 760+
Functions
7.5 General test procedure
5284 / 08/2023 en