Testboy Schuki 2 estavit Schuki 2K Socket Outlet Tester Documentation
- June 13, 2024
- Testboy
Table of Contents
Operating instructions
FI fuse and socket outlet tester
Instructions
The Schuki 2 is a test device for testing socket outlets, cable connections and circuits protected by earth-leakage circuit breakers (ELCB) in 230-V systems as well as older installations with classic ‘protective multiple earthing’. Socket outlets and connecting cables are tested for correct wire connections. The effectiveness of ELCB protected circuits is tested by calibrating the nominal fault current.
Device description
The Schuki 2 is plugged straight into the socket outlet to be tested in the installation. The touch electrode on the top of the housing functions according to the same principle as a phase tester.
Functions
The Schuki 2 (figure 1) is divided into three areas:
- The red warning area indicates the function of the protective earth.
- The yellow testing area indicates the wiring connections.
- The green area is responsible for the earth-leakage circuit breaker (ELCB).
The status of the protective circuit of the socket being tested is indicated by a combination of glowing and non-glowing lamps.
The lamps and their meanings
-
In the yellow area:
L1 Phase conductor
PE Protective earth
N Neutral conductor -
In the red area:
L2 Protective earth
GL1 Touch electrode -
In the green area:
L3 ELCB protected circuit
Control elements
Two elements available for testing the ELCB circuitry.
- (S1) Rotary switch to adjust the nominal fault current
- (T) A button to trigger the nominal fault current
The touch electrode tests the phase conductor according to the principle of a phase tester.
Symbols used in this documentation
To provide a better overview, images are used to enhance the descriptions of
faults. For this purpose, the following symbols are used:
-
Symbol not shaded:
The lamp is not glowing or the button has not been pressed -
Symbol shaded:
The lamp lights up or the button has been pressed -
Plug symbol for test results:
The recognised circuitry is portrayed. -
Danger symbols:
The recognised circuit is a danger to life.
Checking socket outlets and connecting wires
The test is the same for both socket outlets and connecting wires. For this
reason, only socket outlets are mentioned in this documentation.
The device is very easy to operate: turn the switch S1 to OFF, and plug the
device into the socket outlet to be tested. You should ensure that the phase
conductor connects to the lefthand pin (viewed when device is inserted and
faceplate visible).
Checking the correct position
The device is ready to use for testing when the touch electrode is touched and
the lamp GL1 lights up. If it doesn’t, either the device has been incorrectly
inserted or the socket outlet has been incorrectly wired. Rotate the Schuki 2
180°, then re-insert into the socket and re-check the positioning.
Figure 2: All lamps in the yellow area light up. The lamp GL1 must light up
when the touch electrode is touched.
You must observe the fault depicted in figure 9.
Fault indication
No current flowing
None of the lamps light up. Touch the touch electrode as well.
Should none of the lamps light up, the phase conductor is not connected.
If one of the lamps in the yellow area glows, then the phase conductor is
connected to the respective connection.
Figure 3: The lamps N, L1 and L2 light up. When the touch electrode is
touched, the lamp GL1 does not light up.
The phase conductor is not contacting the left-hand pin of the test device
(viewed when device is inserted and faceplate visible); it cannot be tested.
Rotate the Schuki 2 180° and reinsert.
Figure 4: The lamps L1 and PE light up. GL1 lights up when the touch electrode
is touched.
You must observe the fault depicted in figure 5.
Figure 5: The lamps L1 and PE light up. Touching the touch electrode has no
effect.
The phase conductor is connected to the earthing contact!
Figure 6: The lamps L1 and N light up. GL1 lights up when the touch electrode is touched.
Figure 7: Lamp L2 only lights up. Touching the touch electrode has no effect.
This fault configuration is indicated when the testing device has been
incorrectly inserted.
The phase conductor is connected to the earthing contact!
Figure 8: The lamps N, L1 and L2 light up. GL1 lights up when the touch
electrode is touched. This is a typical fault with older installations with
classic ‘protective multiple earthing’, if the phase and protective earth
conductors have been reversed.
The phase conductor is connected to the earthing contact!
Figure 9: The lamps L1, PE and N light up. Touching the touch electrode has no
effect. This is a typical fault in older installations with classic
‘protective multiple earthing’, if the phase and protective earth conductors
have been reversed.
The phase conductor is connected to the earthing contact!
Testing the ELCB protected circuit
Insert the testing device into a socket outlet and test the circuitry. If no
fault is indicated, you can begin testing the ELCB function.
Using the switch S1, adjust the nominal fault current to the required value;
press the button T. The nominal fault current flows for 200 ms.
Note:
- This test can also be carried out in systems not fitted with an ELCB.
- It is permitted to press the button T once every 10 seconds only.
Figure 10: All lamps in the yellow area light up. In addition, the lamp L3
lights up when the button T is pressed. The lamps go out when the ELCB is
tripped.
Please refer to the first fault indication FI, if the ELCB is not tripped.
Figure 11: All lamps in the yellow area light up.
In addition, L3 lights up when the button T is pressed; simultaneously the PE
lamp goes out.
The lamps go out when the ELCB is tripped.
The protective earth conductor has an increased but permissible resistance.
ELCB fault indication
Neutral and PE conductors reversed
ELCB protection defective
The fault is indicated as portrayed in figure 10.
In this case the ELCB is not tripped, the lamps in the yellow area continue to
glow.
Figure 12: All lamps in the yellow area light up. In addition, L3 lights up
when the button T is pressed. Simultaneously, the PE lamp goes out, and L2
flashes on for short period.
L3 goes out after 200 ms; the lamps in the yellow area continue to glow. The
ELCB is not tripped.
The resistance of the PE conductor in unacceptably high. Life threatening
voltages can build up at the earthing contact!
Technical data
| Operating voltage: | 230 V, 50 Hz |
|---|---|
| Display: | Glow lamps |
| Nominal fault current: | 10-30-100-300-500 mA |
200 ms
Permissible ambient
temperature:| -10 °C … +30 °C
Insertion time:| Unrestricted
Insulation:| Protection class 2
Touch electrode:| Leakage current < 10 µA
Dimensions:| 100 x 50 x 75 mm
Weight:| 100 g
Fields of application
The tool is intended for use in applications as described in the operating instructions only. Any other form of usage is not permitted and can lead to accidents or destruction of the device. Any misuse will result in the expiry of all guarantee and warranty claims on the part of the operator against the manufacturer.
Elektrotechnische Spezialfabrik
Beim Alten Flugplatz 3
D-49377 Vechta
http://www.testboy.de
info@testboy.de