VME420CH-D-1 Unter- od. Überspannungsrelais

The VME420 series voltage relays monitor frequency, undervoltage, overvoltage and the voltage between two threshold values in AC and DC systems. The voltages are measured as effective values. The current measured value is permanently shown on the LC display. The measured value leading to the switching of the alarm relays is stored. Adjustable delay times allow system-specific characteristics to be taken into account, e.g. device-related start-up phases, short-term voltage changes, etc.

The VME420 version requires an external supply voltage.

Main features:

- Monitoring of undervoltage, overvoltage and frequency of AC/DC systems 0...300 V

- Various monitoring functions selectable < U, > U, < f, > f

- Start-up, response and release delay adjustable

- Password protection for device settings

- Preset function (automatic basic parameterization)

Features and functions:

- Monitoring of undervoltage, overvoltage and frequency of AC/DC systems 0...300 V

- Various monitoring functions selectable < U, > U, < f, > f

- Start-up, response and release delay adjustable

- Adjustable switching hysteresis

- Effective value measurement (AC + DC)

- Digital measured value display via multifunctional LC display

- Preset function (automatic basic parameterization)

- LED for operation, alarm 1, alarm 2

- Measured value memory for trigger value

- Permanent self-monitoring

- Internal test/reset button

- Two separate alarm relays, 1 changeover contact each

- Quiescent/operating current and fault memory behavior selectable

- Password protection for device settings

- Sealable transparent cover

- 2-module housing (36 mm)

- Spring terminal (two terminals per connection)

- RoHS-compliant

Technical features:

- Measured values effective with LC display

- Special firmware suitable for Swiss applications

- Supply voltage: DC 9.6...94 V / AC 15...460 Hz 16...72 V

- Nominal mains voltage: 0...300 V DC / 15...460 Hz 0...300 V AC

- Display range: 0...300 V AC / DC

- Response value: 6 - 300 V AC / DC

Applications:

- Voltage and frequency monitoring of single-phase machines and systems

- Earth fault monitoring via voltage transformers in medium-voltage networks

- Monitoring of battery systems

- Switching systems on and off above a certain voltage

Installation position:

According to the technical device manual: Any orientation