Voltage Monitor for 3-Phase Networks Type SW31K

Undervoltage Relay for 3-phase networks, Housing type K for switch gear cabinet mount

Voltage Monitor for 3-Phase Networks Type SW31K

Part number

AC 400 V
AC 690 V

Product description

 

Undervoltage monitor for threephase networks without N for monitoring on voltage failure. The voltage is being measured between phases and an artificial neutral point. At symmetrical decrease of the voltage to approx. 50% of the nominal value or in case of failure of a phase the integrated relay (1 change-over contact) releases with a delay ofapprox. 1s. With engines runningon on 2 phases, so much back voltage can be produced that the failure of a phase may be not detected. The SW31K is available for measuring voltages AC 400 V and AC 690 V. As supply voltage in the standard version AC 230 V is needed.

Application

  • Monitoring of three-phase networks on loss of a phase
  • monitoring of fuses

 

Technical Data

Rated supply voltage Us

.......

AC 230 V, +10...-15%, < 3 V

 

other Voltages

.......

upon request

 

Frequency

.......

50/60 Hz

 

Relay-Output

.......

1 change-over contact (co)

 

Type of Contact

.......

Type 2 (see general technical informations)

 

Testing Conditions

.......

see general technical informations

 

Rated ambient Temp. Range

.......

-20°C...+55°C

 

Hysteresis

.......

app. 10% UNenn

 

Switching delay

.......

app. 1 s 

 

Housing

.......

Design K

 

Dimensions (H x W x D) mm

.......

75 x 22 x 115 mm

 

Protection Housing/Terminals

.......

IP 30 / IP 20

 

Weight

.......

app.135 g