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SECTION 4 |
Parameter SYNC GEN set at Option 1= Coarse (Default)
This is the "Default Setting". This setting is applicable when a Generator is connected to AC Input
Terminals marked "GEN" (7,8,9 in Fig 2.3 in Owner's Manuals for (i) EVO-2212/3012/2224/4024
and (ii) EVO-2212E/3012E/2224E/4024E). As compared to very stable frequency of Grid / Inverter
Generator, the frequency of a Generator may vary considerably depending upon the performance
of its Speed Governor that compensates for the drop in RPM / frequency when electrical load is
switched on / increased or, rise in RPM / frequency when electrical load is decreased / switched off.
Hence, if synchronization sensitivity is set at "0= Fine" as in Section 4.5.2.10 (b) below, it may take
very long for the Inverter Section to synchronize with the Generator or, may not synchronize at
all. Under this option, the frequency and phase of the Inverter Section are synchronized with the
Generator differently as follows:
i.
ii. Then, the phase of the Inverter voltage relative to the Generator voltage is tracked by 1º
Parameter SYNC GEN set at Option "0= Fine"
This setting is selected if Grid / Inverter Generator is connected to AC Input Terminals marked
"GEN" (7,8,9 in Fig 2.3 in Owner's Manuals for (i) EVO-2212/3012/2224/4024 and (ii) EVO-
2212E/3012E/2224E/4024E). Synchronization control logic used in this option is suitable for more
stable frequency output of Grid / Inverter Generator. Under this option, the frequency and phase of
the Inverter Section are synchronized with the Grid as follows:
i.
ii. Then, the phase of the Inverter voltage relative to the phase of the Grid / Inverter Generator
4.5.2.10.1 Programming Steps for Parameter "SYNC GEN" (Only for EVO-2212/ 2212E / 3012 / 3012E /
2224 / 2224E / 4024 / 4024E)
Any Operating Mode Screen from
Fig 3.1(b) to 3.8(b)
E V O - 3 0 1 2
I n v e r t i n g
A C
o u t p u t :
1 2 0 . 0 V
1 0 . 0 A
6 0 . 0 0 H z
[Above screen is Screen 1 of Fig 3.2(b)]
86 | SAMLEX AMERICA INC.
Parameter Setup
First, the frequency of the Inverter Section is NOT tracked at 0.1Hz per cycle as in Option "0=
Fine" [See Section 4.5.2.10(b) below] but is made equal to the Generator frequency at zero
crossing of the Inverter voltage.
per cycle. When the phase of the Inverter Section is within ± 10.5º of the Generator input
voltage waveform, the Transfer Relay is activated to transfer the AC load from the Generator
to the Inverter Section at zero crossing of the voltage waveform
First, the frequency of the Inverter Section is tracked in steps of 0.1Hz per cycle and made
equal to the frequency of the Grid / Inverter Generator input.
voltage is tracked by 1º per cycle. When the phase of the Inverter voltage is within ± 3.5º of
the input voltage waveform, the Transfer Relay is activated to transfer the AC load from the
Grid / Inverter Generator to the Inverter Section at zero crossing of the voltage waveform.
Enter Key
S e l e c t
G r o u p
*
C H A R G E
C U R V E
ð
S e l e c t
P a r a m e t e r
I N P U T
S E T T I N G
*
S Y N C
G E N
0 =
F i n e
Down Key x 1 time
S e l e c t
P a r a m e t e r
*
I N P U T
S E T T I N G
ð
Enter Key
P a s s w o r d
k e y
0 0 0 0
ð
Password 8052
See Section 4.3.1
Enter Key
S e l e c t
P a r a m e t e r
I N P U T
S E T T I N G
ð
*
D E F A U L T
0 = 6 0 H z
Enter Key
S e l e c t
P a r a m e t e r
i n
I N P U T
S E T T I N G
ð
*
S Y N C
0 =
F i n e
For programmable options, see Table 4.6,
Parameter Setup Screen No. 9 under
Column 2 for EVO-2212/2212E/3012/3012
E/2224/2224E/4024/4024E
Down Key x 8 times for
EVO-2212/2212E/3012/3012E
/2224/2224E/4024/4024E
ð
F R E Q
G E N
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