6. Non Trip Earth Loop Impedance Test (Ra15mA) @1
Ω
resolution with PFC
calculation
1)
Connect the red, black and green test leads to P, N+E terminals
respectively.
2)
Turn the dial to the Ra 15 mA position. Display shows 'RCD' at the top
centre.
3)
Connect the mains plug to a 230V 50HZ socket outlet, or to the appropriate
conductors on which the test is to be carried out using the croc clips.
4)
Press the
key to select the limit values for contact voltage 50V
(default) or 25V.
5)
Press the yellow key to start the test.
6
At the end of the test, the instrument beeps twice indicating a positive out
come of the test. The relevant results are displayed.
PFC is displayed on lower RHS of Display in Amps
Readings below 1
Ω
are displayed as 1
Ω
Formula for the prospective short circuit current:
I
cc
= U
N
R
a
When U
N
= phase to earth voltage
127V if 100V < V
meas
≤
150V
230V if 150V < V
meas
≤
265V
This test is carried out at 15mA
10
UL
M
GO
7. PHASE ROTATION/ SEQUENCE
1)
Connect red, black and green test leads to P, N and E (L1, L2, and L3)
terminals respectively.
2)
Turn dial to
position.
3)
Connect the test leads to the conductors on which the test is to be carried
out by using the croc clips.
4)
The following screen is displayed:
5)
Press the 'FUNC' key repeatedly to display the three differential voltages,
L1-2, L2-3, and L3-1 individually.
6)
Press the yellow key to start the measurement of phase sequence.
The display must read '123' for correct phase sequence. This means that
the red test lead (connected to L1 ) is phase no 1. The black
test lead (connected to L2 ) is phase no 2, and the green test
lead (connected to L3 ) is phase no 3.
If '213' or '132' are displayed, then the phase sequence is incorrect.
11
386V
386V
386V
voltage between
P2+ P3
voltage between
P1+ P2
voltage between
P3+ P1
GO
Содержание VERITEST 2240
Страница 2: ......
