66 | SAMLEX AMERICA INC.
Parameter
Fault / Alarm
Options
Default
f. Relay setup
1. Fan Fault
Enabled
Enabled
Disabled
2. OV Alarm
(OV: Over Voltage)
Enabled
Enabled
Disabled
3. UV Alarm
(UV: Under Voltage)
Enabled
Enabled
Disabled
4. Overload
Enabled
Enabled
Disabled
5. Overtemp
(Over Temperature)
Enabled
Enabled
Disabled
6. Short
(Short Circuit)
Enabled
Enabled
Disabled
11.3 SURGE / PEAK SURGE POWER PROTECTION
Surge power (also called Peak Surge Power) is the maximum power that the inverter can sustain for a short
time. The Surge/Peak Surge Power differs from the Continuous Power which refers to the amount of power
that the inverter can supply continuously. The Surge/Peak Surge Power is higher than the Continuous Power
and only required for a limited amount of time.
Most circuits / equipment especially those with electromechanical components such as motors, fans, actuators,
pumps, compressors etc. require start-up currents that are usually higher than the rated steady state current
that the equipment draws when operating normally. This initial start-up current may be anywhere up to 10
times the normal steady state operating current, but only lasts for a short period of time, typically between
a few microseconds to a few seconds. The inverter should be able to handle such spikes without interrupting
the operation or the function of the load. Therefore, rather than size the inverter for the worst case short
duration surge/peak current, a good alternative would be to use an inverter that can handle the short term
surge/peak current, yet provide (non-peak) continuous steady state operating current.
This inverter has Surge/Peak Surge Power rating of 2000W for duration for up to around 2 sec (2000W is
the averaged value for less than 8ms that is delivered every ½ cycle of the voltage waveform). If the load
continues to draw 2000W for more than 2 sec, the output of the Inverter will be shut down by the “Overload
Protection” circuitry. See Table 10.1 under “Overload Protection” for status of front panel LEDs and LCD
messaging resulting from this condition. NOTE: When “Overload Protection” is activated, the Inverter will
be latched in shut down condition. To reset the Inverter, switch OFF the Inverter by switching the 3-Position
Rocker Switch (1, Fig 6.1) to OFF position. Wait for 10 sec and switch on again.
11.4 OVERLOAD PROTECTION
The Inverter will shut down if the AC load draws higher than the programmed % of overload power for
more than 2 to 3 sec. Overload power can be programmed from 100% to 110% of the rated power through
programmable parameter called “OL Protection”. For programming details, refer to Fig 10.1 / Table 10.1
SECTION 11 |
Protections and Alarms