The monitoring relay monitors the correct phase sequence L1-L2-L3 (direction of rotation to the right) and complete failures of individual phase voltages. The phase voltages to be monitored are connected to the terminals L1-L2-L3, the terminals 11, 14 or 21, 24 of the relay output contacts are connected ahead of the field coil of the motor relay. If the phase sequence is correct, the output relay is activated (green LED is on). In case of total failure of a phase, the output relay returns to its neutral position (green LED is off). A special supply voltage is not required for the monitoring relay. Connect the device to N. In case of total failure of N (zero conductor), the output relay returns to its neutral position (green LED is off).
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Specifications
General Data | Supply and measuring voltage | L1-L2-L3-N | 400 V / 230 V |
| Current consumption | 10 mA |
| Response delay | smaller than or equal to 1 s |
| Response delay by error | greater than or equal to 100 ms |
| Contacts | 2 x changeover contact (DPDT) |
| Contact material | AgNi |
| Switching voltage | max. 250 V |
| Continuous current | max. 6 A |
| Switching frequency | 1200 cycles/h |
| Mechanical endurance | 3 x 107 switching cycles |
| Electrical endurance | 1 x 105 switching cycles |
| Display | Green LED |
| Housing | |
| Dimensions (W x H x D) | 22.5 x 75 x 95 mm |
| Weight | 120 g |
| Mounting acc. IEC 60715 | TH35 rail DIN |
| Mounting position | any |
| Side-by-side mounting | without space |
| Material | |
| Housing | Polyamid 6.6 V0 |
| Terminal blocks | Polyamid 6.6 V0 |
| Ingress protection for housing / | |
| terminal block (IEC 60529) | IP40 / IP20 |
| Temperature range | |
| Operation | -5 °C to 55 °C |
| Storage | -20 °C to 70 °C |
