91
ZIEHL industrie-elektronik, 74523 Schwäbisch Hall, Germany, +49 791 504-0, info@ziehl.de, www.ziehl.de
Current recognition Type STW
2
AC-Electronic Current Transformer STWA1S
with transistor-output
Electronic current transformer STWA1S
Dimension illustrations
STWA1S
Electronic current trans-
former
with fixed switching-point
The STWA1S has an integrated
electronic with transistor-output.
The switching point is 2 A. Above
app. 2 A the output transistor is
switched on (LOW), below app.
1.5 A it is o (HIGH).
The conductor is simply pushed
through the transformer.Multiple
loops reduce the switching point
corres pondingly, for instance to
0.5 A with four loops. A supply
voltage is not required.
Application: The STWA1S is
used where current ow is to be
detected, with the exact value
of the current either known from
the power consumption of the
connected consumer or does not
matter for the evaluation.
For simultaneous evaluation of the current ow in several
conductors the STWA1S device can be connected in
series (AND circuit, pay attention to the voltage drop)
or in parallel (OR circuit, pay attention to the leak
current).
isolated transistor-output max. DC 40 V/40 mA
output can be directly connected to the digital input
of a PLC
integrated diode for reverse voltage protection
2-wire-connection, 1 m
no supply voltage required
transformer and electronic unit enapsulated in a
climate-proof housing
plug-in current transformer (Ø 11 mm)
max. overload 100 A continously, 300 A / 10 s
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Switching point at Tu = 25°C
Hysteresis
Repeat accuracy
Temperature dependence
Overload cap. continous / 10s
Output voltage/current max.
Voltage drop (ON)
Leak current (OFF)
Switch-on /switch-o delay
nominal frequency/ operating
range
error
rated ambient temperature ran-
ge
Housing
Dimensions (Ø x H)
Diameter for conductor
Weight
AC 2 A +20/-40%
approx. 6%
±5 %
0...55°C: <0,5%/K (-20...0°C: <2,5%/K)
100 A / 300 A
DC 40 V / 40 mA
max. 3 V
max. 0,6 mA
app. 50 / 200 ms
50 Hz/ 30...70 Hz
≤ 1%/Hz
-20...+55 °C
Design S
34,5 x 27 mm
11 mm
app. 60 g
2015-09-21
Wandler
Stromführender
Leiter
SCHWARZ
ROT
Komparator Open-Collector-
Ausgang
Part number: S225195
