Unit Description; General Information; Environment Conditions - Benning ST 720 Bedienungsanleitung

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 original equipment,
3.7 One operating instructions 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 (P.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 (756212)
- Measuring adapter for three-phase loads (passive, without mains voltage-dependent switch-
ing devices)
for R , R (insulating resistance) and I
PE ISO
- 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 and I
PE PE
- 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:
See figure 2:
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,
-key, testing of devices of protection class I (devices with protective conductor and ac-
2
cessible conductive parts which are connected to the protective conductor),

-key, testing of devices of protection class II (shock-proof devices without protective con-
3
ductor and with accessible conductive parts) and testing of devices of protection class III
(safety extra-low voltage),
-key, testing the protective conductor current (differential measurement) or contact current
4
(direct measurement) under operating conditions (test sample is supplied with mains voltage)
-key, reducing the testing voltage to 250 V
5
resistance
-key, testing of 30 mA RCDs
6
-key, testing of three-phase devices under operating conditions
7
8 Digital display, indicates the test progress and individual measuring results,
9 4 mm test socket, for connecting the test cable 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, ÖVE/ ÖNORM E8701 and NEN 3140.
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.

Environment conditions:

- The BENNING ST 720 is intended for making measurements in dry environment.
- Maximum barometric elevation for making measurements: 2000 m,
- Over voltage category/ Siting category: IEC 61010-1 → 300 V category II,
- Contamination class: 2,
- Protection Class: IP 40 (DIN VDE 0470-1 IEC/ EN 60529)
08/ 2010
measurements (direct measurement) under operating conditions:
Appliance front face
Top side of the device
BENNING ST 720
(alternative leakage current) measurements:
EA
or 500 V
DC DC
for measuring the insulating

18