Three-Phase Alternators With Single-Phase Connection - 12 Terminals; Electrical Connections Of The Voltage Regulator - WEG G Serie Manual De Instalación, Operación Y Mantenimiento

4.8.2.3 Three-phase alternators with single-phase connection - 12 terminals

L – L
60Hz L – N
E1 - E3/4
L – L
50Hz L – N
E1 - E3/4
ATTENTION

The cables E1 and E3/4 refers to sensing voltage for AVR (see the AVR manual).

For delta single-phase connection, the sensing terminals of the AVR (E1 and E3/4) originally connected at
the main cables 7 and 9 and the auxiliary coil cable 4 originally connected on the terminal 9, must be
removed from the original position. Reconnect these cables as follows:
- Cables 4 and E3/4 on main cable 8.
- Cable E1 on main cable 1, as diagrams above.
Observe the single-phase power informed on the brochure.

4.8.2.4 Electrical connections of the voltage regulator


To perform correctly the electrical connections of the alternator with the voltage regulator, refer to the manual of the
voltage regulator.

The voltage regulator model used depends on the characteristics of the alternator and the desired application, thus, the
electrical connections with the alternator and the identification of the terminals may differ from one model to another.

The manual of the voltage regulator is provided with the alternator.

The default alternator model of line G is the GTA (with auxiliary coil and without auxiliary exciter).

It is not recommended that the alternator work without GTA auxiliary coil, because with this configuration the power
supply of the voltage regulator is impaired in cases of short circuit or overload. This condition is allowed only in emergency
cases when there is failure of the auxiliary coil. As soon as possible, the alternator must be repaired to maintain the
original characteristics.

The alternators with auxiliary exciter (model GPA) are special and should be manufactured in consultation with WEG.

When using a transformer to adjust the reference voltage of the voltage regulator, the transformer cannot be installed
inside the terminal box of the main alternator.
10680382 Installation, operation and maintenance manual – Synchronous Alternator – G line - Horizontal
Single-phase zigzag parallel
200 - 240
100 -120
200 - 240
190 - 200
95 - 110
190 - 200
8 pins
12 pins - frame 315 – 355
Single-phase zigzag Series
VOLTAGE ( V )
440 - 480
220 – 240
290 – 316
380 - 400
190 - 200
250 – 263
8 pins
12 pins - frame 315 - 355
www.weg.net
Single-phase Triangle
220 - 240
110 - 120
220 - 240
190 - 200
95 - 100
190 - 200
8 pins
12 pins - frame 315 - 355
l 31