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Digital Single- and Three-Phase E-Counters for Active and Reactive EnergyBETA Low-Voltage Circuit Protection

The E-counters (power meters) are used to record the amount of electrical energy ex-ported 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, transfor-mer current connection up to .../5 A

The product spectrum includes single-pha-se and three-phase counters for direct con-nection up to 80 A. Among the three-phase counters there are also versions with trans-former current connection (…/5 A to 10000/5 A). The E-counters save both acti-ve and reactive energy and they all comply with accuracy class 1 (for active energy).

Compliant with the new counter stan-dard EN 50470 (Part 1 and 3)

Easy-to-read LCD

Versions calibrated in accordance with the new Measuring Instruments Direc-tive 2004/22/EC (MID) can be used for invoicing purposes

Exact recording thanks to accuracy class 1 (for active energy)

Highlights

© Siemens AG 2009

Single-Phase and Three-Phase Measuring Devices2

Single-Phase and Three-Phase Measuring Devices7KT1 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-cali-brated E-counters, the registers can be reset.

At the same time the E-counters have an integrated optical inter-face (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.

Three-phase energy counters• Direct connection up to 80 A /

Transformer current connection ... /5 A

© Siemens AG 2009

Single-Phase and Three-Phase Measuring Devices 3

Technical specifications

Single-phase E-counter, direct connection up to 80 A 7KT1 530 7KT1 5317KT1 533

Standards EN 50470-1, EN 50470-3, EN 62053-23, EN 62053-31Connection• Direct connection A 80 80 (MID)General data• Enclosure width Acc. to DIN 43880 MW 2• Mounting Acc. to EN 60715 mm 35• Mounting height mm 70

Function• Operating mode Single-phase loads conductors 2• Storage of setting and count Through (EEPROM) yes• Tariff for active and reactive energy n 1

n 2T1--

--T1 + T2

Supply (through measuring terminals)• Rated control supply voltage Un V AC 230• Voltage range V 184 ... 276

Rated frequency fn Hz 50• Rated power dissipation Pv VA (W) ≤8 (0.6)

Overload capability• Voltage Un Continuous operation V 276

Short-time operation for (1 s) V 300

• Current Imax Continuous operation A 80Short-time operation for (10 ms) A 2400

Display• Display LCD digits 7 (1 decimal point)

Digit dimensions mm x mm 6 x 3

• Active energy: 1 display, 7-digit+ display import or export (arrow)

Tariff/tariffsMax display (continuous)

kWhkWh

000000.0 ... 999999.9999999.9 ... 000000.0

• Reactive energy: 1 display, 7-digit + display import or export (arrow)

Tariff/TariffsMax display (continuous)

kvarhkvarh

000000.0 ... 999999.9999999.9 ... 000000.0

• Instantaneous active power: 1 display, 3-digit W, kW, MW 000 ... 999• Instantaneous active power: 1 display, 3-digit var, kvar, Mvar 000 ... 999

• Current tariff 11 display, 1-digit T1 T1/T2

• Display period s 1

Measuring accuracy At 23 ±1 °C based on nominal value

• Active energy and active power Acc. to EN 50470-3 % ±1 (B)• Reactive energy and reactive power Acc. to EN 62053-23 % ±2

Measuring input

• Connection type Phase/N direct• Operating range voltage Phase/N V AC 184 ... 276

• Current Iref A 15• Current Imin A 0.75• Operating range current (Ist … Imax) Direct connection A 0.0025 ... 80

• Frequency Hz 50• Current waveform Symmetrical sinusoidal• Operational starting current Ist mA 25

S0 interface Acc. to EN 62053-31

• Pulse outputs- Absorbed for active and reactive energy T1 yes --- Absorbed only for active and reactive energy T1 and T2 -- yes

• Pulse count Pulse/kWh 1000• Pulse duration ms 30 ±5 ms• Required voltage V AC

V DC5 ... 230 ±5 %5 ... 300

• Permissible current Pulse ON (max. 230 V AC/DC) mA 90• Permitted current Pulse OFF

(Residual current max. 230 V AC/DC)

µA 1

Optical interfaces

• Calibration from the front (accuracy check) LED Pulse/kWh 1000

IR interface

• At the side for connecting communication modules(LAN-TCP/IP / M-Bus / Modbus RTU / RS-485 / KNX / Profibus DP-VO)

-- yes

Safety Acc. to EN 50470-1

• For indoor areas yes

• Overvoltage category 4• Operational voltage V 300• Test voltage 1.2/50 µs kV 6

© Siemens AG 2009

Single-Phase and Three-Phase Measuring Devices4

* For installation in a distribution board with at least IP51 degree of protection.

Technical specifications

• Flame resistance UL 94 Class V0

Terminal connections

• Lift terminals of main current paths Screw head Z ± POZIDRIV PZ2• Lift terminals for S0 pulse outputs Blade for slotted screw mm 0.8 x 3.5

• Conductor cross-sections of operational current and main current paths- Rigid min. (max.) mm2 1.5 ... 35- Flexible with sleeve min. (max.) mm2 1.5 ... 35

• Conductor cross-sections for S0 pulse outputs- Rigid min. (max.) mm2 0.14 ... 2.5- Flexible with sleeve min. (max.) mm2 0.14 ... 2.5

Ambient conditions

• Mechanical environment M1• Electromagnetic environment E2

• Operating temperature -10 ... +55• Temperature limits for storage and transport °C -25 ... +70

• Relative humidity (without condensation) °C ≤ 80

• Vibrations Sinus amplitude at 50 Hz mm ± 0.075• Degree of protection Installed device

Front side/terminalsIP51*)/IP20

Single-phase E-counter, direct connection up to 80 A 7KT1 530 7KT1 5317KT1 533

Three-phase E-counter Direct connection up to 80 A / Transformer current connection .../5 A

7KT1 5437KT1 545

7KT1 540

Standards EN 50470-1, EN 50470-3, EN 62053-23, EN 62053-31Connection• Direct connection A 80 --• Transformer current connection A -- .../5

General data• Enclosure width Acc. to DIN 43880 MW 4• Mounting Acc. to EN 60715 mm 35• Mounting height mm 70

Function• Operating mode three-phase loads conductors 2-3-4 3-4• Storage of setting and count Through (EEPROM) yes• Tariff for active and reactive energy n 2 T1/T2

Supply (through measuring terminals)• Rated control supply voltage Un V AC 230• Voltage range V 184 ... 276

• Rated frequency fn Hz 50• Rated power dissipation Pv VA (W) ≤ 8 (0.6)

Overload capability• Voltage Un Continuous operation:

phase/phaseV 480

1 second: phase/phase V 800Continuous operation: phase/N V 2761 second: phase/N V 300

• Current Imax Continuous operation A 80Short-time operation for (0.5 s) A -- 120Short-time operation for (10 ms) A 2400 --

Display (readout)• Connection error and phase failure Display of rotating field error PHASE Err• Display LCD digits 8 (1 decimal point)

Digit dimensions mm x mm 6 x 3

• Active energy: 1 display, 8-digit+ display import or export (arrow)

Tariff/tariffsMax display (continuous)

kWhkWh

000000.0 ... 999999.9999999.9 ... 000000.0

• Reactive energy: 1 display, 8-digit + display import or export (arrow)

Tariff/TariffsMax display (continuous)

kvarhkvarh

000000.0 ... 999999.9999999.9 ... 000000.0

• Instantaneous active power: 1 display, 3-digit W, kW, MW 000 ... 999• Instantaneous reactive power: 1 display, 3-digit var, kvar, Mvar 000 ... 999

• Display tariff identification T1/T2• Transformer primary current 1 display, 1-digit -- 5 ... 10000• Display period s 2

Measuring accuracy At 23 ±1°C based on nominal value

• Active energy and active power Acc. to EN 50470-3 % ±1 (B)• Reactive energy and reactive power Acc. to EN 62053-23 % ±2

© Siemens AG 2009

Single-Phase and Three-Phase Measuring Devices 5

* For installation in a distribution board with at least IP51 degree of protection.

Measuring input

• Connection type direct Transformer-CT-TA-TC .../5A• Voltage Un phase/phase V 400

phase/N V 230

• Current Iref A 15 --• Current In A -- 5• Current Imin A 0.75 0.05

• Operating range current (Ist … Imax) Direct connection A 0.0025 ... 80 --Transformer connection A -- 0.010 ... 6

• Transformer current Primary current of the transformer A -- 5 ... 10000Smallest input step A -- 5

• Frequency Hz 50• Input ripple form Symmetrical sinusoidal• Operational starting current Ist mA 25 10

S0 interface Acc. to EN 62053-31

• Pulse outputs- Absorbed for active and reactive energy T1 + T2 yes

• Pulse quantity --- At 75 A Pulse/kWh 500 --- Can be set on transformer, see table Pulse/kWh -- 100-10-1

• Pulse duration ms 30 ±5 ms

• Required voltage V ACV DC

5 ... 230 ±5 %5 ... 300

• Permissible current Pulse ON (max. 230 V AC/DC) mA 90• Permitted current Pulse OFF

(Residual current max. 230 V AC/DC)

µA 1

Optical interfaces

• Calibration from the front (accuracy check) LED Pulse/kWh 1000 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 yes• Overvoltage category 4• Operational voltage V 300• Test voltage 1.2/50 µs kV 6• Flame resistance UL 94 Class V0• Seal between the top and bottom of the enclosure (mod. 7KT1 533) yes

Terminal connections

• Lift terminals of main current paths Screw head Z ± POZIDRIV PZ2 PZ1• Lift terminals for S0 pulse outputs Blade for slotted screw mm 0.8 x 3,5

• Conductor cross-sections of operational current and main current paths- Rigid min. (max.) mm2 1.5 ... 35 1,5 ... 6- Flexible with sleeve min. (max.) mm2 1.5 ... 35 1,5 ... 6

• Conductor cross-sections for S0 pulse outputs- Rigid min. (max.) mm2 0.14 ... 2.5- Flexible with sleeve min. (max.) mm2 0.14 ... 1.5

Ambient conditions

• Mechanical environment M1• Electromagnetic environment E2• Operating temperature -10 ... +55• Temperature limits for storage and transport °C -25 ... +70• Relative humidity (without condensation) °C ≤ 80• Vibrations Sinus amplitude at 50 Hz mm ± 0,075• Degree of protection Installed device

Front side/terminalsIP51*)/IP20

Three-phase E-counter Direct connection up to 80 A / Transformer current connection .../5 A

7KT1 5437KT1 545

7KT1 540

© Siemens AG 2009

Single-Phase and Three-Phase Measuring Devices6

Selection and ordering data (dated 08/2009)

* You can order this quantity or a multiple thereof.

Dimensional drawings

Un Imax MW Order No. PS*/P. unit

Weight 1 unit approx.

V AC AC A Unit(s) kg

Digital single-phase E-counters

• For direct connection, single rate 230 80 4 7KT1 530 1 0,164• For direct connection, double rate 7KT1 531 1 0,164• For direct connection, double ra-

te, calibrated version7KT1 533 1 0,164

Digital three-phase E-counters

• For direct connection, double rate 230 80 4 7KT1 543 1 0,386• For direct connection, double ra-

te, calibrated version7KT1 545 1 0,386

• For transformer connection, double rate

Transformer .../5

7KT1 540 1 0,386

7KT1 530 7KT1 5317KT1 533

4 5

L L N

3

90

I202

_020

66

36

4 5

L L N

321

90

I202

_020

67

36

45 90

I202

_020

65

64446

7KT1 5437KT1 545

7KT1 540

45 90

I202

_020

65

64446

2 3

L1L2L3

1N 54

90

k1I1 k2I2k3 I3

I202

_020

69

72

2 3

L1 L2 L3

1N 54

90

L1 L2 L3

I202

_020

68

72

© Siemens AG 2009

Single-Phase and Three-Phase Measuring Devices 7

Schematics

7KT1 530 7KT1 531, 7KT1 533

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.

7KT1 540

L1 L1 N

3 4 5

230/400 V AC

kvarkWh

~ ~

S0S0~

80 AL1N

I202_02070

+ +-

L1 L1 N

2 3 41 5

230/400 V AC

Tariff

230/400 V AC

230 V AC

kWh kvar

S0 S0~ ~ ~+ +-

L N

80 A

NI202_02071

L1

L1 L1 L2 L2 L3 L3

2 3 4 6N 1 5

230 V AC

230/400 V AC

Tariff

kWh kvar

S0 S0~ ~ ~ ~+ +- -

80A

80 A

80A

I202_02072

L1

L2

L3

L N

N

L1 L1 L2 L2 L3 L3

2 3 4 6N 1 5

230 V AC

230/400 V AC

Tariff

kWh kvar

S0 S0~ ~ ~ ~L N+ +- -

I202_02074

L1

N

80 A

2 3 4 6N 1 5

k1 L1 l1 k2 L2 l2 k3 L3 l3

230 V AC

230/400 V AC

Tariff

kWh kvar

S0 S0~ ~ ~ ~

K

l

L

k

K

l

L

k

K

l

L

k6 A 6 A

I202_02073

+ +- -

L1

L2

L3

6 A

N

L N

© 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 pro-duct names of Siemens AG or supplier companies whose use by third parties for their own purposes may violate the rights of the owner.

More information

Digital single-phase E-counters, display presentation• Green, backlit LCD• The control button is used to select the different display levels.

Operation

Digital three-phase E-counters, display presentation• Green, backlite LCD• The control button is used to select the different display levels.

Power import indicator ( )Power dissipation indicator ( )

Selected / current rate

Indicator for inductive power

Indicator for capacitive power

Indicator for active and reactive power

Control key for readout

kvarh indicator

kWH indicator

Energy value

Is indicated when the energyresult is negative

Bar chart(in percent of Imax)

Device designation andapproval data

LED accuracy monitoringindicator

kWhKvarh

kWh indicatorkvarh 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 SectorBuilding Technologies DivisionElectrical Installation TechnologyPostfach 10 09 5393009 REGENSBURGGERMANY

Subject to change without noticePDF only:(E10003-E38-9T-B2131-7600)PI 0809 En

© Siemens AG 2009

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© Siemens AG 2009