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BETA Measuring
Three-Phase Measuring Devices
7
KT9 0 measuring selector switches
11/28
Siemens ET B1 · 10/2008
*
You can order this quantity or a multiple thereof.
11
■
Overview
Measuring selector switches are used as CO contacts of the
phases for voltages and currents in three-phase systems for
voltmeters and ammeters.
The design of these switches is adapted to match the modular
installation devices. They support use in compliance with
EN 60947-3.
■
Benefits
•
The devices have a rated insulation voltage of 660 V. This
permits use in many systems.
■
Selection and ordering data
■
Dimensional drawings
■
Schematics
Internal interconnection of the phases in the ammeter changeover
contact for the prevention of glitches at the connections of the
current transformers:
U
e
I
e
U
c
MW DT Order No.
Price
per PU
PG PU PS*/
P. unit
Weight
per PU
approx.
V AC A AC V DC
Unit(s) Unit(s) kg
Voltmeter selector switches
400
12
6
3
A
7
KT9 010
027 1
1/48 0.110
Ammeter selector switches for transformer operation
400
12
6
3
A
7
KT9 011
027 1
1
0.110
7
KT9 010
7
KT9 011
52
45
40
54
54
70
64
I2_07811a
Voltmeter switching
L1 N
L1/N
0
L2/N
L3/N
L1/L2
L2/L3
L3/L1
L2
L3/N
3
9
5
1
L2/N
L1/N
0
L1/L2
L2/L3
L3/L1
V
2
12
5
7
L3
7
KT9 010
I2_07813b
Ammeter switching
Switch position Short-circuited phases
L1
L2
L3
0
✓
✓
✓
L1
--
✓
✓
L2
✓
--
✓
L3
✓
✓
--
L1
N
L3
0
L1
L2
L2
5
2
12
4
A
6
7
L3
1
I2_07814c
7
KT9 011
© Siemens AG 2008