The K3YM400VSY20 monitoring relay is a product of the KAPPA series. It has the function of monitoring the voltage of 3-phase and 1-phase networks, and can monitor the deviation, phase failure and asymmetry of the voltage. The product can choose different functions through a rotary switch, including undervoltage monitoring, undervoltage and phase sequence monitoring, monitoring between the maximum and minimum voltage values, and monitoring between the maximum and minimum voltage values and phase sequence monitoring.
The K3YM400VSY20 is a monitoring relay for 3‑phase and 1‑phase systems. It offers configurable voltage thresholds, delay times, and selectable functions such as UNDER, UNDER+SEQ, WIN and WIN+SEQ. The device monitors undervoltage, overvoltage, phase loss, phase sequence, and asymmetry, with LED indicators for each condition and a controllable output relay.
Mechanically the relay is housed in self‑extinguishing plastic (IP40) and mounts on an 11‑pin plug socket (IEC 60067‑1‑18a). It features a width of 38 mm, a cover height of 45 mm, and contact terminals rated for 250 V AC, 5 A, and 1250 VA. Electrical life is rated at 2 × 10⁵ switching cycles, mechanical life at 20 × 10⁸ cycles, and it complies with over‑voltage category 4 kV. This manual is written in German.
| Rated voltage | 250 V AC |
|---|---|
| Rated current | 5 A |
| Rated power | 1250 VA (5 A / 250 V) |
| Mechanical life | 20 × 10⁸ cycles |
| Electrical life | 2 × 10⁵ cycles |
| Maximum switching frequency | 6 per minute at 1000 VA |
| Operating temperature range | -25 °C to +55 °C |
| Storage temperature range | -25 °C to +70 °C |
| Mounting width | 38 mm |
| Cover height | 45 mm |
The relay has a mounting width of 38 mm and a cover height of 45 mm.