VMD460CH NA-D-2 Mains and system protection for monitoring
Product description
The VMD460 is an external grid and system protection (NA protection) that disconnects the connection between the public grid and the generation system in the event of limit value violations by activating tie switches. If the measured voltage and frequency values are outside the normative threshold values, the VMD460 relays switch. The VMD460 is multifunctionally adjustable. The current measured values are permanently shown on the LC display. The measured values leading to the switching of the relays are stored.
Main features:
- Mains and system protection with preset basic programs for country-specific standards and directives.
- Isolated grid detection df/dt (ROCOF) Vector jump
- RS-485 interface (data exchange/parameterization/software update)
- Permanent monitoring of phase and phase-to-phase voltage
- Remote disconnection via ripple control signal receiver
Features and functions:
- Simple commissioning thanks to preset basic programs for country-specific standards and directives
- Single-fault safety
- Monitoring of the connected tie switches (configurable: NC/NO/off)
- Island network detection df/dt (ROCOF)
- Vector jump
- RS-485 interface (data exchange/parameterization/software update)
- Test function for determining the switch-off time
- Test button for the tripping circuit
- Retrievability of the last 300 mains faults with time stamp/real-time clock
- Permanent monitoring of the phase and phase conductor voltage
- Separate switch-on conditions after a threshold value violation
- Language selection (German, English, Italian)
- Illuminated graphic display
- Password protection for device settings
- Remote switch-off via ripple control signal receiver
- Sealable housing
Technical features:
- Supply voltage Us: AC/ DC 100...240V / DC 50/ 60 Hz
- Display range measured value: AC 10...520 V
- Nominal voltage Un (L-N): AC 0...300V
- Rated voltage Un (L-L): AC 0...520V
- Number of switching elements: 2x 1 changeover contact (K1, K2)
- Dimensions W108x H90 x D74 mm
- Weight: 360g
Applications:
- Central NA protection
- Independent switching point between a grid-parallel generation system and the public grid
- Application in accordance with CEI 0-21, VDE-AR-N 4105, BDEW guideline, C10/11, G59/2, G59/3, G83/2, DIN V VDE V 0126-1-1/A1
- Universal for generation systems for safe grid decoupling
Installation position:
According to technical device manual: Any orientation