AVR SX440 운영 매뉴얼 - 페이지 3

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3.2 Stability Adjustment

If a replacement AVR has been fitted or re-setting of

the stability control is required, turn the stability

trimmer slowly clockwise until the output voltage is

steady, on or off load.

3.3 Droop Adjustment

Generator intended for parallel are fitted with a

quadrature droop CT with provides a power factor

dependent signal for the AVR. The CT is connected to

S1, S2 on the AVR. The Droop adjustment is normally

present in the works to give 5% voltage droop at full

load zero power factor. Clockwise increases the

amount of CT signal injected into the AVR and

increases the droop with lagging power factor. With

the control fully anticlockwise there is no droop.

3.4 Trim Adjustment

An auxiliary input is provided to connect to A1, A2. It

is designed to accept DC ± 5V.Turn the TRIM

trimmer fully anticlockwise has no effect, Clockwise

it has maximum effect.

4. FIELD FLASHING

When the regulator is operated with the generator

for the first time, the polarity of residual magnetism

may be reversed or too small to achieve the

necessary build-up voltage for the regulator. If

reversing the field connections does not induce

build-up, and the residual voltage is less than the

specified

value of

Prime-mover and proceed with the following steps :

1. With the Prime-mover at rest and the regulator's

field output wires disconnected, apply a DC

source ( NOT grounded ) of no more than 3~12

VDC with Positive to X and Negative to XX, in

series with a current-limiting resistor of 3~5 ohms

20 watt. (The set battery is a suitable source.)

2. Allow approximately 3 seconds before removing

the DC source.

3. Disconnect the AVR AC power input terminals

and restart the generator, re-measure the

residual voltage. If this voltage is greater than

5VAC, reconnect voltage regulator, and voltage

build-up should be successful. If measured less

than 5VAC, repeat steps 1 and 2.

4. If residual voltage is greater than 5VAC, but AVR

still unable to build up voltage, please replace

with another AVR.

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All manuals and user guides at all-guides.com

VAC, shut down the

WARNING

Overly field flashing may damage the AVR or

generator excitation winding.

Please make sure you have read and

understand the contents of the instruction

manual prior to installation. Incorrect wiring

connection may result in irreversible damage

to the product and other equipments.

5. PARALLEL FUNCTION

5.1 Parallel Compensation

1. When it is required to operate the regulator in

parallel with an isolated or utility bus, in addition

to the regulator provisions, a 10VA current

transformer (CT) is required ( See Figure 3 ). The

CT is connected in a generator line and should

deliver from 1 amperes secondary current at

rated load.

2. The phase relationship of CT signal to the

regulator sensing voltage must be correct or the

system will not parallel properly. The CT must be

installed in the line of the three phase generator

that does not supply sensing to the regulator.

5.2 Reactive Droop Compensation

1. For reactive droop compensation, connect the

CT to it's respective regulator as shown on

Figures 3.

2. A unit-parallel switch shorts the parallel CT

secondary to prevent any droop signal from

being injected into the regulating system during

single unit operation. The switch may not be

required

parallel

applications where a voltage drop is not

objectionable.

droop

compensation

SX440