2
B
AC
110V~400V
AC
110V~400V
L
C
N
AC
230V
L
N
D
E
AC
230V
L
N
F
G
+
-
H
+
-
I
1
2
8
3
4
9
6
5
7
A
GB | Voltage Tester
The VT-310 tester is designed for two-pole measurement of voltage in DC and AC circuits
between 110 and 400 V with a frequency of 0–60 Hz, in order to identify the phase
conductor, the phase sequence in a three-phase system with neutral conductor and to
determine the polarity of DC voltage.
The tester meets the requirements of standard EN 61243-3:2014, in range 110–400 V/
CAT III 400 V, with protection rating of IP54.
Its range of working temperatures is -10 °C to +50 °C, humidity 20–96 %.
The tester can be used for making measurements in electrical wiring and devices falling
within overvoltage category CAT III 400 V.
Overvoltage category CAT III also includes category CAT II for electrical devices and
equipment with special requirements on their safety and usability.
These are, for instance, domestic wiring, protective installations, power outlets, switches,
circuit breakers etc.
Description of Tester
1. Mobile measuring tip
2. Slider
3. Measuring tip of the tester
4. Glow lamp
5. Tester guard
6. Polarity LEDs
7. AC voltage gauge
