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BETA Measuring
Single-Phase Measuring Devices
7
KT1 11, 7KT1 12 digital measuring devices
12/5
Siemens ET B1 · 10/2008
12
■
Overview
These devices for measuring voltages and currents can be used
for monitoring input and output currents or device currents in
electric plants. They are suitable for direct connection in a
single-phase system or for three-phase systems when used in
conjunction with a measuring selector switch.
The measuring ranges of the ammeter are set at the device with
a coding switch.
■
Benefits
•
The ammeters have 14 measuring ranges from 0 ... 20 A to
0 ... 999
A, which can be set using a coding switch.
This ensures universal application.
■
Technical specifications
7
KT1 110
7
KT1 120
Standards
DIN 43751-1, -2
Rated control supply voltage U
c
V AC 230
Operating range
×
U
c
0.9 ... 1.15
Rated frequency
Hz
45 ... 65
Rated operational power P
s
VA < 2
Measuring range
•
Voltage
Direct measurement
V AC 12 ... 600
--
•
Current
Direct measurement
A AC --
0.4 ... 20
direct
Transformer measurement
A AC --
0.1 ... 1000/5
Display
3
LED red; height 10 mm
•
Voltage
> 600 V
H H H
--
< 12 V
-- -- --
--
•
Current
Direct > 20 A
--
H H H
Transformer > 5 A
--
H H H
Direct < 0.4 A
--
-- -- --
Transformer < 0.1 A
--
-- -- --
Measuring cycle
/
s
4
times
Measuring accuracy
At 23 °C
%
±
0.5
±
1
digit
Temperature influence
%/
°C
±
0.03
Overload capability
•
Voltage
Continuous
V
720
--
Short-time for 1 s
V
780
--
•
Current
Continuous, direct
A
--
22
Continuous, transformer
A
--
5.5
Short-time for 1 s, direct
A
--
200
Short-time for 1 s, transformer
A
--
50
Electrical isolation
•
Clearances
mm 3
1.5
•
Creepage distances in the device
mm 4.3
2.1
•
Creepage distances on the printed board
Printed boards not installed
mm 3.0
1.5
Test voltage
50
Hz, 1 min
kV 2.2
1.35
Terminals
± screw (Pozidriv)
1
Conductor cross-sections
Rigid, max.
mm
2
1
× 6/2 × 4
Flexible, with end sleeve, min.
mm
2
0.75
Permissible ambient temperature
°C -10 ... +55
Degree of protection
IP20, with connected conductors
© Siemens AG 2008