24 | SAMLEX AMERICA INC.
SECTION 5 |
Description & Principles of Operation
5.6.6.2 Unsynchronized Type of Transfer in On-Line Mode: Under this condition, Inverter is the Primary
Source and the AC GRID input is the Backup Source. Please refer to information in Table 5.4 below related
to this condition:
TABLE 5.4 UNSYNCHRONIZED TYPE OF TRANSFER IN ON-LINE MODE
Condition of AC GRID input
Operation when Inverter input
is operating normally
Operation when Inverter fails and
is restored subsequently
Frequency of AC GRID
input voltage may or
may NOT be within the
“Synchronizable Frequency
Window” determined by
the parameter “SyncFREQ”
(see Section 5.6.4).
Inverter will be the Primary AC
Source and the AC GRID input will
be the Backup AC Source.
Load will be supplied by the
Inverter. Inverter output frequency
will be FIXED at the programmed
value of parameter “Output FREQ”
(Default value is 60Hz).
Frequency of AC GRID input
will be checked if within the
“Synchronizable Frequency
Window”.
LED marked “AC GRID" Green/
Orange*
LED marked “INVERTER" Green
LED marked “BYPASS”
Off
LED marked “ALARM”
Off
* Green if AC GRID input frequency is
within the “Synchronizable Frequency
Window” determined by the parameter
“Sync FREQ” (see Section 5.6.4).
* Orange if AC GRID input frequency is NOT
within the “Synchronizable Frequency
Window” determined by the parameter
“Sync FREQ” (see Section 5.6.4).
Inverter failure
If Inverter fails, the load will be transferred
to the AC GRID input. Frequency of AC
GRID input voltage may or may NOT be
within the “Synchronizable Frequency
Window” determined by the parameter
“SyncFREQ” (see Section 5.6.4).
LED marked “AC GRID" Green/
Orange*
LED marked “INVERTER" Red
LED marked “BYPASS”
Green
LED marked “ALARM”
Orange
* Green if AC GRID input frequency is within the
“Synchronizable Frequency Window” determined
by the parameter “Sync FREQ” (see Section 5.6.4).
* Orange if AC GRID input frequency is NOT
within the “Synchronizable Frequency Window”
determined by the parameter “Sync FREQ” (see
Section 5.6.4).
Inverter is reset
If and when the Inverter resets
automatically, its output frequency will
be fixed at the programmed value of
parameter “Output FREQ” (Default
value is 60Hz) and then, the load will be
transferred back to the Inverter.
5.7 WIRED REMOTE ON / OFF CONTROL FOR INVERTER SECTION
The Inverter Section can be switched ON and OFF using wired remote ON / OFF control. For this, terminals
ENB, GND and ENB have been provided in the 7-Way Terminal Block at the rear of the unit (12, Fig 6.2).
IMPORTANT NOTE: For activation of wired remote ON / OFF function, the 3-Position Rocker Switch on the
Front Panel (1, Fig 6.1) has to be pressed down towards position marked "EXT. Switch".
4 different methods of control are described in the succeeding Sections 5.7.1 to 5.7.4.