Testboy TV 455VDE-tester Testboy TV 455 Manuale Utente
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Testboy TV 455
TESTBOY TV 450
Voltage, frequency, phase sequence
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5 Measurements
5.1 Voltage, frequency and phase sequence
Voltage and frequency measurement is always active in the terminal voltage monitor. In
the special VOLTAGE TRMS menu the measured voltage, frequency and information
about detected three-phase connection can be stored. Phase sequence measurement
conforms to the EN 61557-7 standard.
See chapter 4.1 Function selection for instructions on
key functionality.
Figure 5.1: Voltage in single
phase system
Test parameters for voltage measurement
There are no parameters to set.
Connections for voltage measurement
L3
L2
L1
L2
L1
N
PE
PE
N
/L
2
N
/L
2
L/
L
1
L/
L
1
P
E
/L
3
P
E
/L
3
result 1.2.3
result 2.1.3
Figure 5.2: Connection of 3-wire test lead and optional adapter in three-phase system
L1
L2
L3
N
PE
R
E
Ro
L
PE
N
L/L
1
N/L2
PE/L3
N/
L
2
L
/L
1
PE/
L
3
Figure 5.3: Connection of plug commander and 3-wire test lead in single-phase system