Phase-Asymmetry Relay Type PS2DK

Phase-Asymmetry Relay for monitoring of Phase-Asymmetry and Phase Sequence

Phase-Asymmetry Relay Type PS2DK

Part number

Product description

 

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

Technical Data

Rated supply Voltage Us

.......

3-phase 380-415 V, without neutral

 

Admissible tolerance

.......

+10%...-15%

 

Power consumption

.......

app. 3 VA

 

Frequency

.......

50/60 Hz

 

Relay output

.......

2 change-over contacts

 

Type of contact

.......

type 2 see General technical informations

 

Test conditions

.......

see General technical informations

 

rated ambient temperature range

.......

-20°C...+55°C

 

Switching point asymmetry

.......

adjustable 5...25%

 

Hysteresis

.......

app. 2%

 

Delay at phase-loss (< 240 V)

.......

app. 0,2 s

 

Switch-back delay at voltage recovery

.......

app. 0,5 s

 

Switching-delay at asymmetry

.......

adjustable0,1...5 s

 

Switching point at symmetric decrease of voltage

.......

not defined

 

Dimensions (H x W x D)

.......

Housing K: 75 x 22,5 x 115 mm

 

Attachment

.......

on 35 mm DIN-rail or with screws M4 (option)

 

Protection housing / terminals

.......

IP 30/20

 

Weight

.......

150 g