02/ 2011
BENNING ST 720
19
3.4 One mains connection cable
3.5 One compact protective pouch,
3.6 Six 1.5-V-batteries/ type AA (IEC LR6) fitted in the unit as initial equipment,
3.7 One operating manual
Parts subject to wear:
- The BENNING ST 720 is provided with two fuses for overload protection:
two fuses with a nominal current of 16 A, 250 V, F, breaking capacity ≥ 500 A, D = 5 mm, L =
20 mm (part no. 10019440)
- The BENNING ST 720 is supplied by six 1.5 V batteries/ type AA (IEC LR6).
Note on optional accessories:
- Test badges "next test", 300 pieces
- Measuring adapter for three-phase loads (passive, without mains voltage-dependent switch-
ing devices)
for R
PE
, R
ISO
(insulating resistance) and I
EA
(alternative leakage current) measurements:
- 16 A CEE coupling - shock-proof plug (044122)
- 32 A CEE coupling - shock-proof plug (044123)
- Measuring adapter for three-phase loads (active, with mains voltage-dependent switching
devices)
for R
PE
and I
PE
measurements (direct measurement) under operating conditions:
- 16 A CEE adapter, three-phase, active (044140)
- 32 A CEE adapter, three-phase, active (044141)
As an alternative:
- BENNING CM 9 leakage current clamp for measuring the differential current, protective
conductor current and load current of single-phase and three-phase loads (044065)
- Measuring adapter for BENNING CM 9 leakage current clamp, conductors led through indi-
vidually, with double insulation:
- 16 A shock-proof coupling - 16 A shock-proof plug (044131)
- 16 A CEE coupling - CEE plug (044127)
- 32 A CEE coupling - CEE plug (044128)
- Test certificate forms for "Testing of electrical devices" are available for download free of
charge at www.benning.de
4. Unit description
See figure 1:
Appliance front face
See figure 2:
Top side of the device
The display and operator control elements specified in Fig. 1 and 2 are designated as follows:
1
test socket
, for connecting the device to be tested,
2
-key
, testing of devices of protection class I (devices with protective conductor and ac-
cessible conductive parts which are connected to the protective conductor),
3
-key
, testing of devices of protection class II (shock-proof devices without protective con-
ductor and with accessible conductive parts) and testing of devices of protection class III
(safety extra-low voltage),
4
-key
, testing the protective conductor current (differential measurement) or contact current
(direct measurement) under operating conditions (test sample is supplied with mains voltage)
5
-key
, reducing the testing voltage to 250 V
DC
or 500 V
DC
for measuring the insulating
resistance
6
-key
, testing of 30 mA RCDs
7
-key
, testing of three-phase devices under operating conditions
8
Digital display
, indicates the test progress and individual measuring results,
9
4 mm test socket
, for connecting the test lead with alligator clip
J
IEC connector
, for connecting the IEC power cord
K
Mains connection socket
, for connecting the mains voltage (230 V, 50 Hz), for voltage
measurement at external shock-proof socket or for connecting the measuring signal cable
of the measuring adapter (16 A CEE adapter, three-phase, active/ 32 A CEE adapter, three-
phase, active)
5. General information
The BENNING ST 720 is intended for electrical safety tests according to DIN VDE 0701-0702,
BGV A3 and ÖVE/ ÖNORM E8701.
Automatically, the BENNING ST 720 verifies the type of the connected test object and informs
the user in case of incorrect selection of the testing procedure [
2
...
3
]: preset limiting values and
measuring results with "pass/ fail" information make it easier to evaluate the test.
- At full battery capacity, the BENNING ST 720 allows to carry out approx. 2,500 device tests.
6. Ambient conditions
- The BENNING ST 720 is intended for making measurements in dry environment.
- Maximum barometric elevation for making measurements: 2000 m,
- Over voltage category/ setting category: IEC 61010-1 → 300 V category II,
- Contamination class: 2,
- Protection class: IP 40 (DIN VDE 0470-1 IEC/ EN 60529)