Overvoltage sensor for switchings of power supplies

The overvoltage sensor protects downstream consumers from defects of power supply with the help of a ramp-up supply voltage.

Two OVP switchings (for + and -) on one printed circuit board
Voltage range up to +34 Volt resp. -34 Volt DC
All switching outputs are opto-coupled.
Each branch has two outputs (thyristor output for the short circuit of the output voltages and for the shut-down of the mains voltage via relays).
The shut-down time (until the firing of the thyristor) amounts about 40 microseconds.
For the operation a auxiliary voltage of +5 Volt is necessary.
Three versions are available:
  • Trigger range +4 to +9 Volt
  • Trigger range +8 to +18 Volt
  • Trigger range +16 to +34 Volt
For the adjustment of the trigger voltage only a multimeter is necessary.
Component placement of the OVP printed circuit board:
(Pin strips RM2.54; pins towards solder side; pins 0.6x0.6 mm)
CON1 - 1 Input voltage positive
CON1 - 2 0 Volt
CON1 - 3  Input voltage negative
CON1 - 4 Actuation thyristor
CON2 - 1 Auxiliary voltage + 5Volt
CON2 - 2 

OVP signal

Circuit diagram of a OVP printed circuit board:



Shut-down behavior:
(Switching with suppressor diodes, short-circuit thyristor and additional relay for the shut-down of the mains voltage)
Overvoltage sensor (OVP 6 Volt)Article no 073 000 1/6
Overvoltage sensor (OVP 12 Volt)Article no 073 000 1/12
Overvoltage sensor (OVP 24 Volt)Article no 073 000 1/24


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