Monitoring; Potentiometer; Figure 8) - Potentiometer And Testjack - Eltek Valere PWS Series User Manual

DC/AC Inverter
PWS series
User Manual
Page 16 (24)

3.4 Monitoring

Monitored values
DC input voltage
AC output voltage
Over-
*
load/temperature
*
Possible reasons: Elevated ambient temperature, continuous overload (approx. 20-25%) or a defec-
tive fan. Overload capability: See section 6 "Technical specification".
REMARK: Keep the maximum allowed overload time because the module does not automatically switch
off.

3.5 Potentiometer

Below the LED indicators the PWS-F is fitted with a potentiometer for fine adjustment of the AC output
voltage.
Potentiometer
Testjack

Figure 8) - Potentiometer and testjack

ELTEK VALERE INDUSTRIAL ©2008
Criteria
Input voltage <85% (±2%) Vi nom.
Input voltage >128% (±2%) Vi nom.
Output voltage <90% Vout nom.
Heat sink temperature of the power
amplifier of the inverter >90°C.
With the potentiometer the AC output voltage can be fine adjusted
(e.g. for the compensation of voltage losses at the parallel opera-
tion choke). Adjustment range: ±2V
The output voltage can be measured at the testjack. Ratio= 1:100
(1V =100V). But it is recommended to measure the output voltage
at the output of the module with consideration of possible voltage
losses at the internal wiring and parallel operation choke.
Function
LED "Vi<" = ON.
The module automatically undelayed
switches off. It automatically
switches on when the input voltage
reaches 103% (±2%) Vi nom. The
hysteresis prevents oscillating of the
automatic switch-off.
LED "Vi>" = ON.
The module automatically undelayed
switches off (overvoltage protec-
tion). It automatically switches on
when the input voltage decreases to
125% (±2%) Vi nom.
LED "ERROR" = ON.
The module automatically switches
off, time delay = 2.5s. An automatic
restart with progressive run-up fol-
lows after 15s. Due to this the mod-
ule is continuous short circuit proof.
LED "OVERLOAD/TEMP.>" = ON.
The module automatically switches
off if the temperature does not de-
crease. It automatically switches on
when the heat sink cools down to
≤70°C.
.
AC
UM_PWS_E_R1.2