Unitor HPC Extreme 520 Specifications download pdf (Page 184)

2012.03 / e

LEROY-SOMER

Installation and maintenance

R 450

AVRs

4531 en -

One red LED:

- Lights up simultaneously with the green led

when the continuous operation threshold is

reached for more than 90 s and the excitation

current is reduced to the continuous

operation threshold. It is used to set the

excitation current ceiling

- Turns off when the excitation current is less

than the setting value (< 110% In)

- Flashes when the excitation current is

above the continuous operation threshold

during less than 90 s.

Green LED stays on,

- ashes when the excitation current has

reached the ceiling in < 10s with PMG

excitation.

- ftays on if Iexc = I Shutdown.

WARNING

If the overload protection is activated, a

voltage drop possibly exceeding 10% of

the reference voltage will be observed.

The AVR does not provide undervoltage

protection. The customer will need to

make sure that their installation is

correctly protected against under-

voltages.

During load shedding, an overvoltage is

observed, which will disappear in a few

seconds.

Diagram 2

9.5

I exc(A)

t(s)

(Maximum current I exc)

Activation of

90 s. tempo

Red led

Green led

90 s. tempo elapsed : application

of permanent limitation

2.9x I threshold

(max. 9.5 A)

threshold

(1...5.5A)

Shutdown

0.5 ~ 0.7

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Unitor HPC Extreme 520 Specifications Page 184

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