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AUTOMATIC VOLTAGE REGULATOR
(MODEL : AVR-126)
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WARNING :
To prevent personal injury or equipment damage, only qualified technicians /operators
should install, operate or service this device.
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CAUTION :
Megger and high potential test equipment should not be used.
Incorrect use of such equipment could damage components contained in the regulator.
1. APPLICATION
:
AVR 125 is voltage regulator to control brushless generator output by regulating
the current into the generator exciter field.
2. FEATURES :
2.1. Available for low resistance exciter filed.
2.2. Under frequency protection circuit.
When the generator frequency drops below the set point, generator output voltage is decreased with
the curve proportional to the frequency.
2.3. Over excitation
When the generator excitation field voltage exceeds 85Vdc, AVR output shut down to protect the
generator winding coil from burning out.
2.4. Starting engine generator set, if the residual voltage remains on the stator winding of generator,
AC output voltage is built up rapidly.
2.5. Durable under dust, damp and vibration.
2.6. Response time, below 25ms(1.5cycles)
3. SPECIFICATIONS
3.1. Input : 190~277Vac, 1
Φ
, 50/60Hz, Burden 650VA (terminal 3-4)
3.2. Output :
MODEL
VOLTAGE
CURRENT
REMARKS
AVR - 125
125Vdc
15A
continuous
Maximum current (for 1min.) - 20A
3.3. Sensing : 1
Φ
,190 ~ 240Vac (220V sensing – terminal 4-3)
1
Φ
,380 ~ 400Vac (380V sensing – terminal 4-E1)
3.4. Exciter field resistance : 2ohms to 100ohms
3.5. External voltage adjust rheostat : 1
㏀
, 2W
(out of supply scope)
3.6. Voltage adjust range
Coarse adjusting (by internal rheostat)
±
12.5%
Fine adjusting (by external rheostat)
±
5%
3.7. voltage regulating accuracy
±
1.0%
3.8. Voltage build up condition internally and automatically raised by the residual voltage from the
Generator stator winding (minimum 3Vac)
