Phase-Asymmetry Relay Type PS2DK
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Phase asymmetry relays PS2DK are used for the protection of electric motors against asymmetries in the 3-phase mains without neutral and for monitoring the phase-sequence.
The switching-point is adjustable and can be adapted to the situation in the mains. If a motor, running with 2 phases, creates the 3rd phase, the sensitivity can be increased. With mains with high harmonics it can be necessary to reduce the sensitivity.
When the sensitivity is reduced to minimum (25% = potentiometer turned fully right) , the device works as a phase-sequence relay. It trips only at wrong phasesequence or missing phase.
If there is a wrong phase-sequence when switching on the device, the relay does not pick up.
- Monitoring of phase-asymmetry
- Monitoring of phase-sequence
- Adjustable sensitivity 5…25 %
- Output-relay with 2 change-over contacts
- Switching delay adjustable 0,1 … 5 s
- LED for display state of operation
Changes from P222505 to P227105: Version with spring terminals RoHS/REACH compliant
Further information can be found in our customer information: "New terminals for K-type devices"
| Product group: | Mains Monitoring |
|---|---|
| Input/ Measured parameter: | Phase |
| Outputs: | Outputs/Relays |
| Supply voltage: | 3-phase current, AC 380 - 415 V |
| Design: | Mount in switchgear cabinet |
| Approval: | EU / UKCA-Declaration of Conformity |
| Extras: | Monitoring of symmetry of phases, Monitoring of phase sequence |
| Applications: | Protection of motors, Protection of pumps |
