Voltage Monitor for 3-Phase Networks Type SW31K
Undervoltage Relay for 3-phase networks, Housing type K for switch gear cabinet mount
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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
