High-precision mains frequency measurement for primary reserve and smart-grid applications
The FRQ310 is a device for measuring the power grid frequency in a number of different applications. It provides a resolution of +/1mHz which makes it particularly suitable for grid frequency measurements in the field of primary control reserve (FFR firm frequency response / dynamic containment). But it will suit perfectly as well in other smart grid and power applications such as substations, small and decentral generating units or virtual power plants.
With its compact dimensions, the frequency measurement card will fit even in smaller housings or control boxes. The device is connected to the grid with two terminals (phase and neutral). The integrated GPS module allows timestamping of the frequency data.
A LED scale at the front shows the deviation from the nominal frequency within a range of +/- 200mHz.
The FRQ310 comes in 2 versions:
Version 1 (extension card):
The frequency measurement is delivered as an extension or the @120 PLC automation system from OHP.
Version 2 (stand-alone, Modbus RTU):
The frequency measurement card comes as stand-alone device. It provides a serial port (Modbus RTU) to connect to any PLC or remote control system.
|5 VDC, max. 135mA, typ. 120mA|
|24 VDC, max. 135mA, typ. 120mA|
|Adjustable nominal frequency||50Hz / 60 Hz|
|Precision||+/- 1 mHz|
|Fuse||100mA träge intern OHP Empfehlung – externe Sicherung 50mA flink|
|Parallel I/O bus|
|Dimensions||132x115x40mm (height x depth x width)|
|Versorgung||11-pole terminal 1/3 C30M|
|Anlagenbus||TNC (f) on top|
|Norms||VDE 0160, UL 508|
|Power consumption||Typ. 800mW (600mW DC + 200mW AC)|
Digital system solutions for infrastructure and industry
OHP GmbH from Rodgau is a system supplier for automation, telecontrol and control technology. We offer our customers products and services for the fields of infrastructure, energy and industrial plants, relying on integrated system technology and open communication standards for safe and economical long-term operation.
Experience and quality since 1989
The employees of OHP combine the know-how of nearly 30 years. Emerging from an AEG development department, we are one of the few companies that can rely on an in-house developed product portfolio ranging from telecontrol/automation devices to open communication technology and control systems with additional packages.
OHP stands for investment protection and innovative system solutions as well as customized engineering and service for the benefit of our customers. OHP has been working according to recognized quality standards for years and is certified according to ISO-9001:2015, SCC occupational health and safety and other standards. ISO 27001 certification is in preparation.
System solutions for a digital infrastructure
- Control technology and station control technology for energy, water, wastewater, infrastructure and industry
- System solutions for virtual power plants and EEG feed-in management
- Telecontrol and automation technology
- Communication technology from modem modules to protocol converters with powerful communication functions
- IT security, secure complete solutions for ISO 27001 certification
- Railroad technology from stationary current monitoring to automation of rail vehicles
- Turnkey systems from planning and execution to training and support
- Electronics / software development / manufacturing for OEM assemblies
Are you interested in OHP’s high-precision power frequency meter?
Yes, I have taken note of the data protection declaration and agree that the data I have provided may be collected and stored electronically.
My data will only be used strictly for the purpose of processing and responding to my request.
By sending the contact form, I agree to the processing.