ZIEHL STW20K Datasheet

ZIEHL STW20K Datasheet
Current recognition Type STW
Current-Relay STW20K
AC-Detection, AND-Evaluation, 3 Transformers
STW20K
The current relay STW20K monitors the current in up to 3 lines
with current transformers STWA1
(AND circuit). If there is a current
in all 3 monitored lines, the relay (2
change-over contacts) picks up. If
there is no current in at least one
of the lines, the relay releases.
The relay works in closed circuit
current. When voltage is applied
to the STW, the relay signals an
Features
• 3 current transformers STWA1
• AND-evaluation
• relay output 2 CO
• Switching point approx. AC 1 A
• LED-display for power on and alarm
• housing design K
2
alarm until the it has picked up.
Part number:
S225121
AC/DC 24-240 V
Technical Data
L1
L2
L3
STW20K
.com
Applications:
Identifies power failure with 1- or
3-phase electrical consumers,
e.g. with monitoring of heating
elements or heating installations
where a constant heating has to
be guaranteed.
A further application is the identification of phase failure, monitoring
of fuses, or triggering of operating
hours counters.
If the switching threshold is not
reached due to low currents of
less than 1 A, the monitored
wire should be led multiple times
through the transformer. Not
required inputs have to be connected to a occupied input.
Stromrelais
F4
S1
AC/DC
24...240 V
0/50/60 Hz
<2 W <4 VA
Ue = 250 V
Ie = 3 A
AC 15
ON
gn
F1
F2
F3
ALARM
rt
~ Us ~
+
–
A1 A2 14 11 12 24 21 22 0
+
~
Us
2
3
K1
~
3x Stromwandler/
current transformer
STWA1(H)
S2
K1
1
ALARM
STWA1H (+) = 1...3
STWA1H (-) = 0
M
3~
N
Power supply Us
AC/DC 24 - 240 V, 0/50/60 Hz, < 1 W, < 4 VA
(DC 20 - 297 V, AC 20 - 264 V)
Output relay
Type of contact
2 CO
type 2 see "general technical informations"
Function
Transformer input
Overload cap.continous/max 10s
Switching point on
Switching point off
Tolerance
Switch-off delay
Switch-on delay
Testing conditions
rated ambient temperature range
3 channel/AND
1 to 3, type STWA 1
100 A / 300 A
≤ AC 1 A
≥ AC 0,3 A
± 20%
approx. 0,3 s
approx. 0,3 ms
see "general technical informations"
-20°C…+55°C
Dimensions H x B x T
Protection housing / terminals
Weight
design K: 75 x 22,5 x 110 [mm], 12-pol
IP 30 / IP 20
approx. 120 g
ZIEHL industrie-elektronik, 74523 Schwäbisch Hall, Germany, +49 791 504-0, [email protected], www.ziehl.de
2015-09-04
85
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