YOKOGAWA WT310 User Manual

2-43
IM WT310-02EN
Making Preparations for Measurements
1
2
3
4
5
6
7
App
Index
Wiring Example of a Three-Phase, Four-Wire System (3P4W) with
VTs and CTs
Model: Applies to the WT333.
The wiring is connected to input elements 1, 2, and 3.
SOURCE
LOAD
L
CT VT
V
v
L
CT
VT
V
v
L
CT
VT
V
v
S
T
R
N
Element 1
Element 2 Element 3
C
±
±
V
C
±
±
V
C
±
±
V
Wiring Example With the Three-Voltage, Three-Current Method
(3V3A) and VTs and CTs
Model: Applies to the WT333.
The wiring is connected to input elements 1, 2, and 3.
SOURCE LOAD
S
T
R
L
CT
VT
V
v
L
CT
VT
V
v
L
CT
VT
V
v
Element 1
Element 2 Element 3
C
±
±
V
C
±
±
V
C
±
±
V
Note
For details about the relationship between the wiring system and how measured and computed values are
determined, see appendix 1, “Symbols and Determination of Measurement Functions.”
2.11 Wiring the Circuit under Measurement When Using a Voltage or Current Transformer

YOKOGAWA WT310 Specifications

General

Model	WT310
Category	Digital Power Meter
Current Measurement Range	0.5 mA to 20 A
Weight	Approx. 3.5 kg
Voltage Measurement Range	15 V to 600 V
Frequency Range	100 kHz
Basic Accuracy	0.1%
Power Accuracy	0.1%
Display	LCD
Interfaces	USB, RS-232, GP-IB
Input Elements	1
Dimensions	213 mm x 88 mm x 346 mm