WEG EA05A-WG Manual De Instalación Y Operación página 2

1. INTRODUCTION
When a three-phase generator is supplying a load, the N phase current will vary with the load shared by each of the 3
phases (load imbalance). Hence, the voltage from N phase to each of the 3 phases – R,S,T - will also change. So when
the rated voltage of a traditional single input AVR is above 220V using the N phase as a detection source will increase
voltage fluctuations and easily leads to voltage imbalance.
The EA05A-WG improves the above situation; increasing the usable range of generator rated voltages that can serve as
the "Phase" voltage for detection, such as 277V 380V, 440V, etc.
2. SPECIFICATION
Nominal operating current
Peak current (max. 10 sec.)
Sensing Input
Power supply
Output voltage
Field resistance
Static regulation
Voltage build-up
Operating frequency
Under Frequency
protection (U/F)
Factory setting
External voltage adjustment
Operating Temperature
EMI suppression
Maximum power consumption
Approximate weight
3. IDENTIFICATION OF CONNECTION TERMINALS
E1/E2, E3/4: Sensing voltage (220/277/380/440 Vac)
3, E3/4: Power supply.
EXT.VR: Connection for potentiometer 1kΩ/1W (Must use insulated stranded wire for connection)
F+, F-: Connection for generator field.
NOTE
1. Sensing voltage 220 Vac : terminals 3 and E1/E2 can be connected together (see Fig.6) or separately
(see Fig.5).
Sensing voltage 277 / 380 / 440 Vac: terminals 3, E3/4 and E1/E2, E3/4 must be connected
separately (see Fig.7 , 8 and 9). The voltage between 3 and E3/4 must be less than or equal to 300
Vac.
2. If no potentiometer is used, keep EXT.VR terminal connected. (shorted)
3.
Terminal Cable AWG 16 (1.25mm
5A
7A
SW2 ON SW3 ON (220V)
SW2 OFF SW3 ON (277V)
SW2 ON SW3 OFF (380V)
SW2 OFF SW3 OFF (440V)
1 phase 2 wire (DIP switch)
100 - 300 Vac (1 phase 2 wire)
Max. 63 Vdc @ 220 Vac input
Max. 90 Vdc @ 240 Vac input
Min. 15 Ω Max. 100 Ω
< ± 0.5% (with 4% engine governing)
Residual voltage at AVR terminal > 5 Vac
50/60 Hz (DIP switch)
For 60 Hz operation preset at 55Hz
For 50 Hz operation preset at 45Hz
7% with 1kΩ/1W potentiometer
-40 - +65°C
EMI Filter
Max. 8W
183g ± 2%
2
) 85C , above 600 V.
www.weg.net
180 – 250 Vac
240 – 310 Vac
315 – 440 Vac
370 – 510 Vac
Automatic Voltage Regulator | 2