- Fluxgate-based current sensor
- Self check function
- IEC 62752 and IEC60947-2, UL 2231 version available
- Frequency range DC to 1.0 kHZ
- Full load current up to 1000 A r.m.s. (1-phase) or 3 x 320 A r.m.s. (3-phase)
- Residual current range : 0…1,000mA
- Applications : Solar inverter residual current
Modular Residual Current Device (MRCD) for Photovoltaics (PVs)
Parasitic capacitance is found in between the modules and ground of the photovoltaic system, and the stray current flows through this capacitance. Recently, transformerless inverters are commonly being used. In this case, if electrical grounding occurs on either the direct or alternating current, unbalanced stray current will flow due to the parasitic capacitance. Thus, it is importance to have facilities with devices that can detect and block electrical grounding from the converter’s direct current to prevent fire.
DC and AC (20 Kz) are both found in the ground current. The MRCD is able to detect this, and it must access and send a signal to the external monitoring device through remote communication.
