JKFK hybrid switches combine a thyristor path with magnetically latched relay contacts. The thyristor initiates connection at a voltage zero crossing, the relay carries the steady current, and disconnection is completed at a current zero crossing. The range supports simultaneous three-phase compensation and separate phase compensation in low-voltage capacitor banks.
The switch monitors its semiconductor path, relay and supply condition. Phase-loss and self-detected faults inhibit closing or disconnect the switch, and loss of operating power trips the device. The control input is optically isolated.
The following electrical data apply to the 45A configuration. The illustrated range also includes a separately marked 60A variant; select its matching electrical and mechanical specification when ordering.
| Parameter | Specification |
|---|---|
| Rated system voltage | 380VAC or 220VAC, ±20% |
| Rated frequency | 50Hz±5% |
| Controlled three-phase capacitor output | ≤30kvar, delta connection |
| Controlled individual-phase output | ≤10kvar per phase branch, star/split-phase arrangement |
| Circuit consumption | ≤1.5VA |
| Interval between on/off operations | ≥1s |
| Reclosing interval | >100s; fixed 100s inhibit after initial energization or opening |
| Control voltage | 8-18VDC |
| Voltage distortion limit | ≤5% |
| Operating life | 100000 operations |
| Response time | ≤1000ms |
| Closed-contact resistance | ≤0.003Ω |
| Input resistance | ≥5.1kΩ |
| Operating power supply | 220V |
| Maximum rated current | 45A |
| Contact voltage drop | ≤100mV |
| Contact withstand voltage | ≥1600V |
| Insulation resistance under normal ambient conditions | ≥10MΩ |
The split-phase circuit uses a neutral conductor and separate phase control inputs. The simultaneous circuit switches a delta-connected capacitor bank. N denotes the transformer neutral and V the control common. K1 serves as the common three-phase trigger in simultaneous compensation, or the L1 phase trigger in split-phase compensation. K2 and K3 are the L2 and L3 split-phase triggers; the illustrated trigger inputs are active at low potential.
The illustrated front outline is 96mm wide and 160mm high, with an 80×145mm fixing pattern and two Ø5mm mounting holes. Check the enclosure depth and terminal clearance for the selected current and connection variant.
