Voltage Monitoring Type SW
Voltage Monitor for 3-Phase Networks
Undervoltage
Undervoltage monitor for three-
phase networks without N for
monitoring on voltage failure.
The voltage is being measured
between phases and an artificial
neutral point. At symmetrical
decreaseofthevoltagetoapprox.
50% of the nominal value or in
case of failure of a phase the
integrated relay (1 change-over
contact) releases with a delay of
approx.1s. Withenginesrunning-
onon2phases, somuchbackvoltagecanbeproduced
SW31K
that the failure of a phase may be not detected. The
SW31K is available for measuring voltages AC 400 V
andAC690V.Assupplyvoltageinthestandardversion
AC 230 V is needed.
Application:
•
Monitoring of three-phase networks on loss of a
phase
monitoring of fuses
•
SW31K
Made in Germany
Unterspannungswächter
S222272
UM 3 ~ 400 VAC
AC 220-
240 V
50-60 Hz
Part numbers:
S222272
S222271
≥1
AC 400 V
AC 690 V
50%
U
L1
< 2VA
A1 A2
L2
L3
15 16 18
Special Versions upon request
2 L1
SIGNAL ON
ALARM
T 4 A (gL)
AC 230 V
50 Hz
2 N
1 L1
3 AC
400 V
1 L2
1 L3
Rated supply voltage Us
other Voltages
AC 230 V, +10...-15%, < 3 V
upon request
Technical Data
Frequency
50/60 Hz
Relay-Output
1 change-over contact (co)
Type of Contact
Type 2 see "general technical information"
Testing Conditions
Rated ambient Temp. Range
Hysteresis
see "general technical information"
-20°C...+55°C
app. 10% UNenn
Switching delay
app. 1 s
Design K: 75 x 22 x 115 mm
IP 30 / IP 20
app.135 g
Dimensions (H x W x D) mm
Protection Housing/Terminals
Weight
80
ZIEHL industrie-elektronik, 74523 Schwäbisch Hall, Germany, +49 791 504-0, info@ziehl.de, www.ziehl.de
2015-12-14