Adjustment Of Maximum Excitation Current (Excitation Ceiling) - Leroy-Somer R 449 Manual

ÐÅÃÓËßÒÎÐ
R 449
1.8.2 - Ðåãóëèðîâêà ìàêñ. âîçáóæäåíèÿ
- ñòàòè÷åñêàÿ ðåãóëèðîâêà
ïîòåíöèîìåòð Ð5 (çàâîäñêàÿ ðåãóëèðîâêà : 15 À,
êàëèáð ïðåäîõðàíèòåëåé 15 À 10 ñ).
R 449
P5
P4
ST5
Âîçáóæäåíèå
ìàêñ.
ST2
P3
P2
Íàïðÿæåíèå
Voltage
Çàâîäñêàÿ ðåãóëèðîâêà
âîçáóæäåíèÿ, äîñòàòî÷íîìó
ïîëó÷èòü óñòàíîâèâøèéñÿ
êîðîòêîãî çàìûêàíèÿ ïðèáë. â òðè âåëè÷èíû
íîìèíàëüíîãî òîêà ïðè 50 Ãö, äëÿ ïðîìûøëåííîé
ìîùíîñòè, çà èñêëþ÷åíèåì ñïåöèàëüíûõ óêàçàíèé
(*).
×òîáû èçìåíèòü (óâåëè÷èòü,
óìåíüøèòü) ýòî çíà÷åíèå,
ñòàòè÷åñêóþ ðåãóëèðîâêó ïðè îñòàíîâå, êîòîðàÿ íå
ïðåäñòàâëÿåò îïàñíîñòè íè äëÿ ãåíåðàòîðà, íè äëÿ
óñòàíîâêè. Îòêëþ÷èòü ïîäâîä ïèòàíèÿ Õ1, Õ2 è Z1,
Z2 (0 - 220 Â - 380 Â) îò ãåíåðàòîðà.
Ïîäêëþ÷èòü ïèòàíèå ñåòè (200 - 240 Â), êàê
óêàçàíî (Õ1, Õ2 :
ïîñëåäîâàòåëüíî ñ èíäóêòîðîì
àìïåðìåòð íà 20 À ïîñò.òîêà. Åñëè ðåãóëÿòîð íå
îáåñïå÷èâàåò ðàñõîäà,
ïîòåíöèîìåòð Ð2 (íàïðÿæåíèå) íàïðàâî äî òåõ
ïîð, ïîêà àìïåðìåòð íå íà÷íåò óêàçûâàòü íà
íàëè÷èå ñòàáèëèçèðîâàííîãî
âíîâü ïîäêëþ÷èòü ïèòàíèå,
íàïðàâî äî ïîëó÷åíèÿ æåëàåìîãî ìàêñ. çíà÷åíèÿ
òîêà (íå ïðåâûøàòü çíà÷åíèÿ â 15 À).
Ïðîâåðêà âíóòðåííåé çàùèòû :
Îòêðûòü ïðåðûâàòåëü
äîëæåí âîçðàñòàòü
óñòàíîâëåííîãî ïîðîãîâîãî
óñòàíîâèòüñÿ íà ýòîì çíà÷åíèè â òå÷åíèå > 10 ñ è
óïàñòü äî çíà÷åíèÿ â 1 À.
Äëÿ ïîâòîðíîãî âêëþ÷åíèÿ
îòêëþ÷èòü ïîäà÷ó ïèòàíèÿ ïðåðûâàòåëåì (À).
Ïðèìå÷àíèå : Ïîñëå
çíà÷åíèÿ òîêà âîçáóæäåíèÿ ïî îïèñàííîé âûøå
ïðîöåäóðå, âíîâü
íàïðÿæåíèÿ.
(*) : Âî ìíîãèõ ñòðàíàõ íàëè÷èå òîêà òðåõôàçíîãî
êîðîòêîãî çàìûêàíèÿ ïðèáë. â òðè âåëè÷èíû
íîìèíàëüíîãî ÿâëÿåòñÿ
òðåáîâàíèåì.
ïðåäåëà òîêà,
 çàâèñèìîñòè îò
÷àñòîòû ñåòè
ST3
According frequency
X2
50 Ãö 60 Ãö/ Z1
50Hz 60Hz
X1
Z2
E+
E-
0V
ST1
P1
220V
S1 S2
380V
ST4
ñîîòâåòñòâóåò òîêó
äëÿ òîãî, ÷òîáû
òîê òðåõôàçíîãî
èçìåíèòü èëè
ìîæíî âûïîëíèòü
0-220 Â). Ïîäêëþ÷èòü
âîçáóæäåíèÿ
ïîâîðà÷èâàòü
òîêà. Îòêëþ÷èòü,
ïîâîðà÷èâàòü Ð5
(D) : òîê âîçáóæäåíèÿ
äî ïðåäâàðèòåëüíî
çíà÷åíèÿ,
çàùèòû íóæíî
ðåãóëèðîâêè ïîðîãîâîãî
âûïîëíèòü ðåãóëèðîâêó
îáÿçàòåëüíûì
Regulator
R 449
1.8.2 - Adjustment of maximum excitation current
(Excitation ceiling)
- static adjustment of excitation current limitation, poten-
tiomètre P5 (factory adjustment : 15 A, fuse caliber : 15
A - 10 seconds).
Ñåòü (Ïèòàíèå 50/60 Ãö)
Mains (Supply 50/60 Hz)
A
+
-
A
10 À ïîñò. / 10A CC / DC
D
The factory adjustment corresponds to the excitation cur-
rent for a sustained 3 phase short circuit, of about 3 ti-
mes the rated current ,unless otherwise specified.(*)
To modify this setting it is possible to proceed to a static
adjustment (generator at standstill) by a method that is
safe for the machine and the plant.
Disconnect the supply leads (X1,X2,Z1,Z2) and sensing
leads (0-220-380) from A.V.R.. Connect the supply as
shown (X1,X2,0,220V). Connect an ammeter (20A , dc)
in series with the exciter field. Turn P5 fully CCW. Switch
on the supply. If there is no output current from AVR,
turn P2 (voltage) clockwise until ammeter indicates a
stabilized current.
Switch the supply off, then on again. Turn P5 clockwise
until the required current is obtained in the exciter field.
(limit to 15A)
Checking internal protection :
Switch off (D) : the excitation current must rise to the
pre-set high level, and remain at this level for a period of
more than 10 seconds, than fall to less than 1A.
To reset, switch off the supply by opening switch (A).
Note : After having adjusted the excitation current limita-
tion as indicated above, proceed to the voltage/frequen-
cy adjustment .
(*) : In many countries the short-circuit current equal to 3
IN is obligatory.
Èíäóêòîð ïðèáë 10 Îì
Exciter field
~ 10 ohms
9