© Siemens AG 2009
Digital Single- and Three-Phase
E-Counters for Active and
Reactive Energy
BETA Low-Voltage Circuit Protection
The E-counters (power meters) are used to record the amount of electrical energy exported or imported. Siemens compact E-counters are designed as modular devices for
alternating current and can be mounted on standard mounting rails. They comply
with the counter standard EN 50470 (Part 1 and 3) and come with an LCD.
„ Direct connection up to 80 A, transformer current connection up to .../5 A
The product spectrum includes single-phase and three-phase counters for direct connection up to 80 A. Among the three-phase
counters there are also versions with transformer current connection (…/5 A to
10000/5 A). The E-counters save both active and reactive energy and they all comply
with accuracy class 1 (for active energy).
Highlights
„ Compliant with the new counter standard EN 50470 (Part 1 and 3)
„ Easy-to-read LCD
„ Versions calibrated in accordance with
the new Measuring Instruments Directive 2004/22/EC (MID) can be used for
invoicing purposes
„ Exact recording thanks to accuracy
class 1 (for active energy)
Answers for infrastructure.
© Siemens AG 2009
Single-Phase and Three-Phase Measuring Devices
7KT1 5 digital measuring devices
Overview
All E-counters have a pulse output (S0) and are designed for
1-tariff or 2-tariff measurements depending on the version. The
calibrated versions are in accordance with the new Measuring
Instruments Directive 2004/22/EC (MID). In the case of non-calibrated E-counters, the registers can be reset.
At the same time the E-counters have an integrated optical interface (IrDA) for connecting communication modules. Integration
of the E-counters, e.g. in energy management systems, is thus
possible.
Benefits
Single-phase energy counters
• Direct connection up to 80 A
Calibrated versions (MID)
A) Space for device name and approval data.
B) Seal between the top and bottom of the enclosure.
2
Single-Phase and Three-Phase Measuring Devices
Three-phase energy counters
• Direct connection up to 80 A /
Transformer current connection ... /5 A
© Siemens AG 2009
Technical specifications
Single-phase E-counter, direct connection up to 80 A
7KT1 530
Standards
Connection
• Direct connection
General data
• Enclosure width
• Mounting
• Mounting height
EN 50470-1, EN 50470-3, EN 62053-23, EN 62053-31
A
80
MW
mm
mm
2
35
70
conductors
n1
n2
2
yes
T1
--
Supply (through measuring terminals)
• Rated control supply voltage Un
• Voltage range
V AC
V
230
184 ... 276
Rated frequency fn
• Rated power dissipation Pv
Hz
VA (W)
50
≤8 (0.6)
Continuous operation
Short-time operation for (1 s)
V
V
276
300
Continuous operation
Short-time operation for (10 ms)
A
A
80
2400
LCD
Digit dimensions
digits
mm x mm
7 (1 decimal point)
6x3
Tariff/tariffs
Max display (continuous)
Tariff/Tariffs
Max display (continuous)
kWh
kWh
kvarh
kvarh
000000.0 ... 999999.9
999999.9 ... 000000.0
000000.0 ... 999999.9
999999.9 ... 000000.0
Function
• Operating mode
• Storage of setting and count
• Tariff for active and reactive energy
Overload capability
• Voltage Un
• Current Imax
Display
• Display
• Active energy: 1 display, 7-digit
+ display import or export (arrow)
• Reactive energy: 1 display, 7-digit
+ display import or export (arrow)
Acc. to DIN 43880
Acc. to EN 60715
Single-phase loads
Through (EEPROM)
7KT1 531
7KT1 533
80 (MID)
-T1 + T2
000 ... 999
W, kW, MW
var, kvar, Mvar 000 ... 999
• Instantaneous active power: 1 display, 3-digit
• Instantaneous active power: 1 display, 3-digit
1
T1
• Current tariff
1 display, 1-digit
• Display period
T1/T2
1
s
Measuring accuracy
At 23 ±1 °C based on nominal value
• Active energy and active power
• Reactive energy and reactive power
Acc. to EN 50470-3
Acc. to EN 62053-23
%
%
±1 (B)
±2
Phase/N
Phase/N
V AC
direct
184 ... 276
Direct connection
A
A
A
15
0.75
0.0025 ... 80
Hz
50
Symmetrical sinusoidal
25
Measuring input
• Connection type
• Operating range voltage
• Current Iref
• Current Imin
• Operating range current (Ist … Imax)
• Frequency
• Current waveform
• Operational starting current Ist
S0 interface
mA
Acc. to EN 62053-31
• Pulse outputs
- Absorbed for active and reactive energy T1
- Absorbed only for active and reactive energy T1 and T2
• Pulse count
• Pulse duration
• Required voltage
• Permissible current
• Permitted current
yes
-Pulse/kWh
ms
V AC
V DC
1000
30 ±5 ms
5 ... 230 ±5 %
5 ... 300
Pulse ON (max. 230 V AC/DC)
Pulse OFF
(Residual current max.
230 V AC/DC)
mA
µA
90
1
LED
Pulse/kWh
1000
-yes
Optical interfaces
• Calibration from the front (accuracy check)
IR interface
• At the side for connecting communication modules
(LAN-TCP/IP / M-Bus / Modbus RTU / RS-485 / KNX / Profibus DP-VO)
Safety
--
Acc. to EN 50470-1
• For indoor areas
• Overvoltage category
• Operational voltage
• Test voltage
yes
yes
1.2/50 µs
V
kV
4
300
6
Single-Phase and Three-Phase Measuring Devices
3
© Siemens AG 2009
Single-phase E-counter, direct connection up to 80 A
• Flame resistance
7KT1 530
UL 94
Class
V0
Screw head Z ± POZIDRIV
Blade for slotted screw
mm
PZ2
0.8 x 3.5
• Conductor cross-sections of operational current
and main current paths
- Rigid min. (max.)
- Flexible with sleeve min. (max.)
mm2
mm2
1.5 ... 35
1.5 ... 35
• Conductor cross-sections for S0 pulse outputs
- Rigid min. (max.)
- Flexible with sleeve min. (max.)
mm2
mm2
0.14 ... 2.5
0.14 ... 2.5
7KT1 531
7KT1 533
Terminal connections
• Lift terminals of main current paths
• Lift terminals for S0 pulse outputs
Ambient conditions
• Mechanical environment
• Electromagnetic environment
M1
E2
• Operating temperature
• Temperature limits for storage and transport
• Relative humidity (without condensation)
• Vibrations
• Degree of protection
Sinus amplitude at 50 Hz
Installed device
Front side/terminals
°C
-10 ... +55
-25 ... +70
°C
≤ 80
mm
± 0.075
IP51*)/IP20
* For installation in a distribution board with at least IP51 degree of
protection.
Technical specifications
Three-phase E-counter
Direct connection up to 80 A / Transformer current connection .../5 A
7KT1 543
7KT1 545
Standards
Connection
• Direct connection
• Transformer current connection
EN 50470-1, EN 50470-3, EN 62053-23, EN 62053-31
80
--
General data
• Enclosure width
• Mounting
• Mounting height
Acc. to DIN 43880
Acc. to EN 60715
MW
mm
mm
4
35
70
Function
• Operating mode
• Storage of setting and count
• Tariff for active and reactive energy
three-phase loads
Through (EEPROM)
conductors
n2
2-3-4
yes
T1/T2
Supply (through measuring terminals)
• Rated control supply voltage Un
• Voltage range
V AC
V
230
184 ... 276
• Rated frequency fn
• Rated power dissipation Pv
Hz
VA (W)
50
≤ 8 (0.6)
Continuous operation:
phase/phase
1 second: phase/phase
Continuous operation: phase/N
1 second: phase/N
V
480
V
V
V
800
276
300
Continuous operation
Short-time operation for (0.5 s)
Short-time operation for (10 ms)
A
A
A
80
-2400
Display of rotating field error
LCD
Digit dimensions
digits
mm x mm
PHASE Err
8 (1 decimal point)
6x3
Tariff/tariffs
Max display (continuous)
Tariff/Tariffs
Max display (continuous)
kWh
kWh
kvarh
kvarh
000000.0 ... 999999.9
999999.9 ... 000000.0
000000.0 ... 999999.9
999999.9 ... 000000.0
Overload capability
• Voltage Un
• Current Imax
Display (readout)
• Connection error and phase failure
• Display
• Active energy: 1 display, 8-digit
+ display import or export (arrow)
• Reactive energy: 1 display, 8-digit
+ display import or export (arrow)
-.../5
3-4
120
--
000 ... 999
W, kW, MW
var, kvar, Mvar 000 ... 999
• Instantaneous active power: 1 display, 3-digit
• Instantaneous reactive power: 1 display, 3-digit
4
A
A
7KT1 540
• Display tariff identification
• Transformer primary current
• Display period
1 display, 1-digit
Measuring accuracy
At 23 ±1°C based on nominal value
• Active energy and active power
• Reactive energy and reactive power
Acc. to EN 50470-3
Acc. to EN 62053-23
s
Single-Phase and Three-Phase Measuring Devices
%
%
T1/T2
-2
±1 (B)
±2
5 ... 10000
© Siemens AG 2009
Three-phase E-counter
Direct connection up to 80 A / Transformer current connection .../5 A
7KT1 543
7KT1 545
7KT1 540
direct
400
230
Transformer-CT-TA-TC .../5A
V
V
A
A
A
15
-0.75
-5
0.05
A
A
A
A
0.0025 ... 80
----
-0.010 ... 6
5 ... 10000
5
Hz
50
Symmetrical sinusoidal
25
10
Measuring input
• Connection type
• Voltage Un
phase/phase
phase/N
• Current Iref
• Current In
• Current Imin
• Operating range current (Ist … Imax)
• Transformer current
Direct connection
Transformer connection
Primary current of the transformer
Smallest input step
• Frequency
• Input ripple form
• Operational starting current Ist
S0 interface
mA
Acc. to EN 62053-31
• Pulse outputs
- Absorbed for active and reactive energy T1 + T2
yes
Pulse/kWh
Pulse/kWh
ms
-500
-30 ±5 ms
V AC
V DC
5 ... 230 ±5 %
5 ... 300
Pulse ON (max. 230 V AC/DC)
Pulse OFF
(Residual current max.
230 V AC/DC)
mA
µA
90
1
LED
Pulse/kWh
1000
• Pulse quantity
- At 75 A
- Can be set on transformer, see table
• Pulse duration
• Required voltage
• Permissible current
• Permitted current
-100-10-1
Optical interfaces
• Calibration from the front (accuracy check)
10000
IR interface
• At the side for connecting communication modules
(LAN-TCP/IP / M-Bus / Modbus RTU / RS-485 / KNX / Profibus DP-VO)
yes
• Front-accessible for data readout (acc. to EN 62056-21 over IR measuring head)
ja
Safety
•
•
•
•
•
•
Acc. to EN 50470-1
For indoor areas
Overvoltage category
Operational voltage
Test voltage
1.2/50 µs
Flame resistance
UL 94
Seal between the top and bottom of the enclosure (mod. 7KT1 533)
V
kV
Class
yes
4
300
6
V0
yes
Terminal connections
• Lift terminals of main current paths
• Lift terminals for S0 pulse outputs
Screw head Z ±
Blade for slotted screw
• Conductor cross-sections of operational current
and main current paths
- Rigid min. (max.)
- Flexible with sleeve min. (max.)
• Conductor cross-sections for S0 pulse outputs
- Rigid min. (max.)
- Flexible with sleeve min. (max.)
POZIDRIV
mm
PZ2
0.8 x 3,5
PZ1
mm2
mm2
1.5 ... 35
1.5 ... 35
1,5 ... 6
1,5 ... 6
mm2
mm2
0.14 ... 2.5
0.14 ... 1.5
Ambient conditions
•
•
•
•
•
•
•
Mechanical environment
Electromagnetic environment
Operating temperature
Temperature limits for storage and transport
Relative humidity (without condensation)
Vibrations
Degree of protection
Sinus amplitude at 50 Hz
Installed device
Front side/terminals
°C
°C
mm
M1
E2
-10 ... +55
-25 ... +70
≤ 80
± 0,075
IP51*)/IP20
* For installation in a distribution board with at least IP51 degree of protection.
Single-Phase and Three-Phase Measuring Devices
5
© Siemens AG 2009
Selection and ordering data (dated 08/2009)
Un
Imax
V AC
AC A
MW Order No.
PS*/
P. unit
Weight 1
unit
approx.
Unit(s)
kg
Digital single-phase E-counters
• For direct connection, single rate 230
• For direct connection, double rate
• For direct connection, double rate, calibrated version
80
4
7KT1 530
7KT1 531
7KT1 533
1
1
1
0,164
0,164
0,164
80
4
7KT1 543
7KT1 545
1
1
0,386
0,386
7KT1 540
1
0,386
Digital three-phase E-counters
• For direct connection, double rate 230
• For direct connection, double rate, calibrated version
• For transformer connection,
double rate
Transformer
.../5
* You can order this quantity or a multiple thereof.
Dimensional drawings
36
7KT1 530
6
36
4
5
44
64
7KT1 531
7KT1 533
Single-Phase and Three-Phase Measuring Devices
1
2
3
4
5
L1 L2 L3 L1 L2 L3
90
45
90
6
N
L1L2 L3k1I1 k2I2k3 I3
72
7KT1 543
7KT1 545
45
90
3
90
2
72
7KT1 540
I202_02065
N
1
I202_02069
L
I202_02068
L
I202_02065
N
I202_02067
L
90
90
I202_02066
L
N
12345
345
6
44
64
© Siemens AG 2009
Schematics
230 V AC S0 S0
L
N
~ ~ ~
+ - +
S0 S0
~ ~ ~
+ - +
3
1
5
4
2
3
5
4
Tariff
kWh
kvar
kWh
L1 L1 N
kvar
L1 L1 N
L1 80 A
L1 80 A
N
N
I202_02070
I202_02071
230/400 V AC
230/400 V AC
7KT1 530
7KT1 531, 7KT1 533
S0
S0
~ ~ ~ ~
+ - + -
230 V AC
L
N
1
N
2
3
4
5
230 V AC
L
6
N
Tariff
1
N
2
S0
S0
~ ~ ~ ~
+ - + 3
4
5
6
Tariff
kWh
kvar
kWh
L1 L1 L2 L2 L3 L3
kvar
L1 L1 L2 L2 L3 L3
L1 80 A
L1 80 A
L2 80A
N
L3 80A
230/400 V AC
N
I202_02074
I202_02072
230/400 V AC
7KT1 543, 7KT1 545
7KT1 543, 7KT1 545
To achieve the specified accuracy, the N-conductor must be connected to
the counter.
With single-phase connection the display lighting cannot be activated.
230 V AC
L
1
N
N
2
S0
S0
~ ~ ~ ~
+ - + 3
4
5
6
Tariff
kWh
kvar
k1 L1 l1 k2 L2 l2 k3 L3 l3
6A 6A 6A
k
l
k
l
k
l
K
L
K
L
K
L
L1
L2
L3
N
230/400 V AC
I202_02073
7KT1 540
Single-Phase and Three-Phase Measuring Devices
7
© Siemens AG 2009
More information
Digital single-phase E-counters, display presentation
• Green, backlit LCD
• The control button is used to select the different display levels.
Power import indicator (
Power dissipation indicator (
kvarh indicator
)
)
kWH indicator
Selected / current rate
Energy value
Indicator for inductive power
Is indicated when the energy
result is negative
Indicator for capacitive power
Bar chart
(in percent of Imax)
Indicator for active and reactive power
Device designation and
approval data
Control key for readout
LED accuracy monitoring
indicator
Operation
Digital three-phase E-counters, display presentation
• Green, backlite LCD
• The control button is used to select the different display levels.
kWh
Kvarh
kWh indicator
kvarh indicator
Power import indicator (
Power export indicator (
T12
→)
←)
Selected / active tariff
Phase value of energy display (L1-2-3) and ΣL
Phase total of energy display
Indicator for inductive power
Indicator for capacitive power
Indicator for active and reactive power
Indicator for the current transformer ratio,
primary side
Bar diagram (in percent of Imax)
Device name and approval data
LED accuracy check indicator
Control button
Siemens AG
Industry Sector
Building Technologies Division
Electrical Installation Technology
Postfach 10 09 53
93009 REGENSBURG
GERMANY
www.siemens.com/beta
Subject to change without notice
PDF only:
(E10003-E38-9T-B2131-7600)
PI 0809 En
© Siemens AG 2009
The information provided in this brochure contains descriptions
or characteristics of performance which in case of actual use do
not always apply as described or which may change as a result of
further development of the products. An obligation to provide
the respective characteristics shall only exist if expressly agreed
in the terms of contract. Availability and technical specifications
are subject to change without notice.
All product designations may be registered trademarks or product names of Siemens AG or supplier companies whose use by
third parties for their own purposes may violate the rights of the
owner.