CT Lab Vecto III User Manual

Vecto III User Manual
57
4.2.3.2 110 V Voltage Transformer (VT) Circuits & 400 V Direct (Star/ 4-wire
systems)
Terminal
Legend
110V VT Circuit or 400V/550V Star (4-wire) Systems
1.
V
1
Phase 1
2.
V
2
Phase 2
3.
V
3
Phase 3
4.
V
com
Neutral (Star connection point)
5.
V
4+
Earth (optional for 400 V systems only)
6.
V
4-
Star connection point (Neutral) (Optional and for 400 V
systems only)
Table 10: VT circuit connection layout for 4-wire star connection
• Connect Phase 1,2 and 3 to Voltage Inputs 1-3 as shown in Figure 29 below.
• Connect Neutral (on 400 V systems) or the star-point (on 110 V VT circuits) to
V
com
.
• The fourth voltage input may be used on 400 V systems to measure Neutral-
Earth voltage.
Always connect the safety earth terminal located on the power
connector first

CT Lab Vecto III Specifications

General

Brand	CT Lab
Model	Vecto III
Category	Measuring Instruments
Language	English