WEG GRT7TH4 R2, Installation, Operation And Maintenance Manual

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l Automatic Voltage Regulator – GRT7-TH4-R2
12
4 TECHNICAL CHARACTERISTICS
Table 4.1 - Mechanical and electrical characteristics.
Models
Characteristics
GRT7-TH4 R2
5A AM/220M
GRT7-TH4 R2
5A EM/220M
GRT7-TH4 R2
5A GM/110M
GRT7-TH4 R2
7A AM/220M
GRT7-TH4 R2
7A EM/220M
GRT7-TH4 R2
7A GM/110M
Nominal field current
5A 5A 5A 7A 7A 7A
Nominal current with
forced ventilation
7A 7A 7A 10A 10A 10A
Peak current (max.
1min)
7A 7A 7A 10A 10A 10A
Protection fuse for
power supply
3A 3A 3A 5A 5A 5A
Sensing (selected
via jumper cable)
(V
Ral
)
160-300 or
340-570 Vac
180-240 or
515-660 Vac
85-140 or
170-280 Vac
160-300 or
340-570 Vac
180-240 or
515-660 Vac
85-140 or
170-280 Vac
External voltage
control
Through 5K/3W potentiometer.
Sensing power
supply
Single Phase.
Power Supply
Range (V
al
)
170 to 300Vac 93 to 126 Vac 170 to 300Vac 93 to 126 Vac
Power supply
curren.
Single Phase
Rectifier gain ratio
(K
c
)
0,45.
Maximum field
voltage (V
f
)
76,5 Vdc (V
al
mín),
112,5 Vdc (V
al
máx).
41,8 Vdc (V
al
mín),
56,7 Vdc (V
al
máx).
76,5 Vdc (V
al
mín),
112,5 Vdc (V
al
máx).
41,8 Vdc (V
al
mín),
56,7 Vdc (V
al
máx).
Field Resistance @
20ºC
6 up 50 Ω .
Static Regulation
0,5%.
Adjustable dynamic
response
8 to 500ms.
Operation
Frequency (jumper
JHz )
50 or 60Hz.
Sub frequency
protection (U/F)
Adjustable via trimpot
Internal percent
adjustment of
voltage
Adjustable via trimpot, for the complete range of Voltage V
Ral
External percent
adjustment of
voltage
- 30% of V
Ral.
Temperature
-40° to + 60ºC.
EMI Suppression
EMI filter
Approximate Weight
480g
LED Indicators None
Protection for
Excitation Over
current
Absentee
Analog Input +/-
9Vdc
Optional
Analog Input 0 to
10Vdc
Optional
Digital Input
Optional
Parallel operation With optional transformer ratio (PAR/1 ratio 1A and PAR/5 ratio 5A