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

7.5 General test procedure
Functions
5284 / 08/2023 enBENNING ST 755+ / ST 760+40
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
PE
(protective conductor resistance)
• R
Insu-1
(insulating resistance LN-PE)
• R
Insu-2
(insulating resistance sec.-PE)
• R
Insu-3
(insulating resistance LN-sec.)
• R
Insu-4
(insulating resistance LN-accessible parts without PE)
• I
PE
(protective conductor current)
• I
Cont
(contact current)
• I
Leak
(leakage current for medical electrical devices)
• I
PLeak
(patient leakage current)
• Funct. (functional test)
• Cable (continuity test)
• U
a
(output voltage)
• PRCD (portable residual current protection device)
• U
a weld.
(voltage welding circuit)
• I
Cont weld.
(contact current welding circuit)
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.