DOLD 0068811 – MK9837N.38/550 2×5-600HZ UH AC230V | JUAL DOLD 0068811 – MK9837N.38/550 2×5-600HZ UH AC230V – Frequency Relay MK 9837N/5_0 | Relay modules > Monitoring devices > Measuring relays / Monitoring relays > Measuring relays for main monitoring > MK 9837N/5_0 > Frequency Relay > Frequency Relay MK 9837N/5_0 > MK9837N.38/550 2×5-600HZ UH AC230V