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SECTION 4 |
4.5.2.7.1 Programming Steps for Parameter "LOW RESET"
Any Operating Mode Screen from
Fig 3.1 to 3.8
E V O - 1 2 1 2 F
I n v e r t i n g
A C
o u t p u t :
1 2 0 . 0 V
< 0 . 1 0 A
6 0 . 0 0 H z
[Above screen is Screen 1 of Fig 3.2(a)]
4.5.2.8 SYNCHRONIZATION (Table 4.6, Parameter Screen No. 7 under Column 1 for EVO-1212F/1212F-HW/1224F/122F-HW)
NOTE: Parameter "SYNCHRONIZATION" is NOT available for EVO-2212 / 3012 / 2224 / 4024 and EVO-2212E /
3012E / 224E / 4024E
In EVO-1212F/1212F-HW/1224F/1224F-HW/4248SP the frequency and phase of the Inverter Section are always kept
synchronized with the AC input source. This facilitates faster and safer transfer of power between the Inverter Section
and the AC input source. For supplementary details on synchronized transfer of AC power, please refer to Sections
4.4.2.1.1 to 4.4.2.1.4 of the Owner's Manuals for (i) EVO-1212F/1212F-HW/1224F/1224F-HW and, (ii)EVO-4248SP.
In EVO-1212F/1212F-HW/1224F/1224F-HW/4248SP, parameter "SYNCHRONIZATION" is used to program the desired
sensitivity of frequency and phase synchronization of the Inverter Section with the AC input source.
2 programming options are available for parameter "SYNCHRONIZATION" for EVO-1212F/1212F-HW/1224F/1224F-
HW/4248SP. These options are: (i) Option "0= Fine" – see Section 4.5.2.8(a) below and (ii) Option "1= Coarse" – see
Section 4.5.2.8(b) below.
When EVO™ is operating in Inverting Mode (there is no AC input), its output frequency will be equal to the frequency
that has been selected by the programming parameter "DEFAULT FREQ" (TABLE 4.6 and Section 4.5.2.1). When AC
input is made available, it is first monitored for 2 sec. If it is within the programmed values of (i) frequency limits (TABLE
4.6), (ii) low voltage limits (TABLE 4.7) and (iii) high voltage limits (TABLE 4.8), synchronization process is initiated to
synchronize the frequency and phase of the Inverter Section with the incoming AC input voltage. Details are given
below:
a) Parameter "SYNCHRONIZATION" set at Option "0= Fine"
This is the "Default Setting" for EVO-1212F/1212F-HW/1224F/1224F-HW/4248SP. Synchronization
control logic used in this option is more suitable for AC input source that has very stable frequency
like the Grid or Inverter Generator. Under this option, the frequency and phase of the Inverter
Section are synchronized with the AC input source as follows:
i.
ii. Then, the phase of the Inverter voltage relative to the AC input voltage is tracked by 1º per
82 | SAMLEX AMERICA INC.
Parameter Setup
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
*
L O
R E S E T
W
5 6 H z
First, the frequency of the Inverter Section is tracked in steps of 0.1Hz per cycle and made
equal to the frequency of the AC input source.
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 AC input source to the
Inverter Section at zero crossing of the voltage waveform.
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
(i) Down Key x 5 times for EVO-1212F/1212F-
HW/1224F/1224F-HW/4248SP
(ii) Down Key x 6 times for EVO-2212/2212E/3012/
3012E/2224/2224E/4024/4024E
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
F R E Q
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
*
L O
R E S E T
W
5 6 H z
For programmable range, see Table 4.6:
(i) Parameter Setup Screen No. 6 (Column 1) for
EVO-1212F/1212F-HW/1224F/E/1224F-HW/4248SP
(ii) Parameter Setup Screen No. 7 (Column 2) for
EVO-2212/2212E/3012/3012E/2224/2224E/4024/4024E
ð
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