User Manual

Page 40
EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
[e-mail]
PSB 9000 2.5 kW Series
3.4.6 Safety OVP
This extra feature is only built into the 60 V model of this series. Similar to the regular overvoltage protection
(OVP, see 3.4.3), the Safety OVP is supposed to protect the application or people according to SELV. The alarm
shall prevent the device from providing an output voltage higher than 60 V. However, the alarm could also be trig-
gered by an external source providing an excess voltage to the DC input of the device.
A safety OVP alarm can occur if
• the voltage on the DC of the device reaches the rigid threshold of 60.6 V.
IfthevoltageontheDCterminalexceedsthatlevelforanyreason,theDCterminalwillbeswitchedo󰀨andalarm
“Safety OVP” will be indicated in the display. This alarm can’t be acknowledged the usual way. It requires to pow-
er-cycle the unit.
During normal operation of the power supply, this alarm shouldn’t trigger. There are, however,
situations which can trigger the alarm, like when working with voltages close to the threshold of
60.6 V or voltage spikes when leaving CC mode when the current was 0 A before.
When remote sensing is used, i. e. the rear input “Sense” is connected, the true output voltage
(source mode) is higher than set value so the Safety OVP could already trigger at voltage
settings lower than 60 V.