KYORITSU 6300 Instruction Manual - Manual (Page 60)

MODEL6300
5. 4
MODEL6300 Section 5 Wiring
Section
5
5-3 Using supplementary VT/ CT’s (not supplied with the instrument)
DANGER
Ɣ Never make measurement on a circuit in which electrical potential exceeds
AC600V.
Ɣ Connect the Power cord to a socket outlet. Never connect it to the socket outlet of
AC240V or more
.
Ɣ This instrument must be used on the secondary side of VT(transformer) and
CT(current transformer).
Ɣ Do not open-circuit the secondary side of a supplementary CT while it is energized
because of the high voltage generated at the secondary side terminals.
CAUTION
Ɣ When a VT or CT is used the measurement accuracy is not guaranteed due to
several factors namely phase characteristics and VT/CT accuracies.
The use of supplementary VT/CT’s may be required if the voltage/current
values of the circuit under test fall outside the instrument measuring range.
In this case the value at the primary side of circuit can be obtained directly
by measuring the secondary side with appropriate an VT or CT installed in
the line under test as follows.
<Example of single-phase 2-wire (1ch) “1P2W(1ch)”>
In this case, set the actual ratio of VT and CT to be used.
* VT ratio: “Setting 05”
* CT ratio: “Setting 06”
VN V1 A1
N
L
Source Load
VT CT
i