ZIEHL PS2DK Datasheet

ZIEHL PS2DK Datasheet
Phase Monitoring Type PS - Phase Asymmetry - Phase Sequence
Phase asymmetry Relay Type PS2DK
Monitoring of Phase-Asymmetry and Phase Sequence
Part number:
Technical Data
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
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
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.
Rated supply Voltage Us
3-phase 380-415 V, without neutral
Admissible tolerance
Power consumption
app. 3 VA
50/60 Hz
Relay output
Type of contact
2 change-over contacts
type 2 see "General technical informations"
Test conditions
rated ambient temperature
see "General technical informations"
Switching point asymmetry
Delay at phase-loss (< 240 V)
Switch-back delay at voltage
Switching-delay at asymmetry
Switching point at symmetric
decrease of voltage
adjustable 5...25%
app. 2%
app. 0,2 s
app. 0,5 s
Dimensions (H x W x D)
Housing K: 75 x 22,5 x 115 mm
on 35 mm DIN-rail or with screws M4 (option)
Protection housing / terminals
IP 30/20
150 g
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
adjustable 0,1...5 s
not defined
ZIEHL industrie-elektronik, 74523 Schwäbisch Hall, Germany, +49 791 504-0, [email protected], www.ziehl.de
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