Phase Sequence Test - Benning CM1–4 Instrucciones De Servicio

Note:
- If a voltage is applied to the measuring point, the BENNING CM 1-4 auto-
matically switches to the voltage measuring range.
see fig. 5: Resistance measurement
8.7 Continuity tests with buzzer and LED
- Connect the black safety measuring lead to the black jack (-/L1) 9 of the
BENNING CM 1-4.
- Connect the red safety measuring lead to the red jack (+/L2) J of the
BENNING CM 1-4.
- Press the Ω/A key 6 or the HOLD key 7 to switch on the BENNING CM 1-4.
- The BENNING CM 1-4 is ready as soon as the digital display 4 shows the
" - - - - " symbol.
- Bring the safety measuring leads into contact with the measuring points. If
the line resistance between the black jack (-/L1) 9 and the red jack (+/L2) J
falls below a value between 1.8 kΩ and 2.7 kΩ, the integrated buzzer of the
BENNING CM 1-4 sounds and the
Note:
- If a voltage is applied to the measuring point, the BENNING CM 1-4 auto-
matically switches to the voltage measuring range.
see fig. 6: Continuity test with buzzer

8.8 Phase sequence test

Do not exceed the maximum permitted voltage with respect to
earth potential!
Please observe the overvoltage category of the electric circuit!

Attach the protective caps (CAT III/IV) to the contact tips be-
fore making measurements in circuits of overvoltage category
CAT III or IV.
Electrical danger!
The highest voltage that may be applied to the jacks
- jack (-/L1), black 9
- jack (+/L2), red J for voltage and resistance measurements as well as for
continuity testing,
of the BENNING CM 1-4 against ground is 1000 V.
- Connect the black safety measuring lead to the black jack (-/L1) 9 of the
BENNING CM 1-4.
- Connect the red safety measuring lead to the red jack (+/L2) K of the
BENNING CM 1-4 and snap the test probe +/L2 onto the rear holder on the
BENNING CM 1-4.
- Press the Ω/A key 6 or the HOLD key 7 to switch on the BENNING CM 1-4.
- The BENNING CM 1-4 is ready as soon as the digital display 4 shows the
" - - - - " symbol.
- Fully grasp the rubberized gripping surface 8 of the BENNING CM 1-4, ap-
ply the test probes -/L1 and +/L2 to two external conductors (phases) and
check whether the external conductor voltage of e. g. 400 V is applied.
- A clockwise phase sequence (phase L1 before phase L2) is given, if the
green
- A counter-clockwise phase sequence (phase L2 before phase L1) is given, if
the green
- The phase sequence test always requires a countercheck with the test
probes -/L1 and +/L2 being inverted.
Note:
The phase sequence test can be carried out in an earthed three-phase mains
from 90 V to 1000 V, 45 Hz to 65 Hz (phase to phase). Protective clothing and
insulating conditions on site might impair the function.
see fig. 7.1: Phase sequence test (clockwise)
see fig. 7.2: Phase sequence test (counter-clockwise)
02/ 2020
LED lights up.
LED lights up.
BENNING CM 1–4
LED lights up.

27