3-Phase Meter Telstar CT - Current Transformer Version

The smart-me Telstar CT is an MID-certified energy meter with integrated WiFi interface for the transmission of real-time data and with connection for external converters. The meter synchronises the measured values automatically and encrypted in the smart-me cloud. The measured data can be exported to various third-party systems and processed further via various interfaces.


Technical Data

Operating voltage 3x230/400VAC

Current input range  Imin-Iref(Imax): 0.01-1(6)A

Product certification CE, MID 2014/32/EU, CH load profile/reactive energy, RED

CT ratio 1:1 to 20'000:1 or 5:5 to 20'000:5

Accuracy class Class B (1%)

Meter type Four-quadrant meter (purchase and delivery) for active and reactive energy

Measured values Active energy (kWh), active power (kW), reactive energy (kVArh), reactive power (kVAr), current (A), voltage (V), power factor (cosφ), switch status

Tariffs Two via digital tariff input or use of any virtual tariffs in the cloud

Digital input Floating input, tariff input (12 VDC - 48VDC / 12VAC - 230 VAC)

Digital output S-0 Floating outputs (SG ready), max. 48VDC / max. 230 VAC, Pmax < 0.4 W (Opto-MOSFET)

Digital outputs S-1 Floating outputs (SG ready), max. 48VDC, max. 230VAC, Pmax < 1500 W (Relais)

WiFi standard 802.11 b/g/n

WiFi security standard WEP, WPA-PSK/WPA2-PSK

S0 pulse weight 1,000 pulses per kWh (configurable to 10,000 pulses/kWh)

Data storage Two months

Temperature range -25 to +70°C

Measuring device category CAT III

IP class IP 20 (clamps), IP 51 (housing)

Dimensions Five modules, 90 x 90 mm

Rel. humidity Average 75%, without condensation / short term 95%, without condensation

Assembly DIN rail

Server location Switzerland

Data volume per month < 25MB

Internet connection < 0.1 Mbit/s

Configuring inputs and outputs

The smart-me meter has two outputs and one input, which can be used as pulse inputs and outputs or as a switchable potential-free contact. Details can be found here


The counter has a rolling display. The items described below are displayed one after the other. After the last point, it starts again at point 1:

1.8.1 (A +) Active energy import tariff 1

1.8.2 (A +) Active energy import tariff 2

2.8.1 (A-) active energy delivery tariff 1

2.8.2 (A-) active energy delivery tariff 2

1.8.0: 5A (A +) active energy total import 5A basis

2.8.0: 5A (A-) active energy total delivery 5A basis

5.8.0 (Q1) Inductive reactive energy import total

6.8.0 (Q2) Total capacitive reactive energy import

7.8.0 (Q3) Total inductive reactive energy delivery

8.8.0 (Q4) Total capacitive reactive energy delivery

       0.4.2 Converter factor (including S0 pulses / kWh)

C.1.6 Ch: 2218 firmware checksum

0.2.0 V 1.1 firmware version

C.60.9 Fraud Flag (possible attempted fraud detected)

PhL: 1 only phase L1 connected

PhL: 2 only phase L2 connected

PhL: 3 only phase L3 connected

PhL: 23 Phase L1 not connected

PhL: 13 Phase L2 not connected

PhL: 12 phase L3 not connected

Correct phase sequence: Numbers light up statically

Incorrect phase sequence: numbers are flashing

Measurements and Wiring

Dimensions [mm]

Wiring diagram

T1 button for installation

T2 special functions

In short: If T2 is pressed> 2s, the green LED lamp switches on / off. If this is activated, it shows the connection status

Glowing green: connected to smart-me cloud

Flashing green: connection is currently established, at the moment no connection

Long: If T2 is pressed> 8s, the display of the power is switched between active and reactive power. In addition, the calibration pulse LED alternates between active energy and reactive energy.

Very long: If T2 is pressed> 14s, the S0-0 pulse output is switched between active power and reactive power.

ATTENTION: This setting only changes the display, not in the smart-me cloud (app and website). If the reactive energy is to be displayed in the cloud, this must be done in the general settings.

E1 tariff input, potential-free

Tariff 1: 0V (or not connected)

Tariff 2: 12 - 48VDC / 12 - 230VAC

adjustable as a digital input

S0-0 S0 pulse output, potential-free

  Power MOSFET with PMAX = 0.4 W

  adjustable as a digital output

S-1 power output, potential-free

 Relay with PMAX = 1,500 W

Shipping information

Item number: 212062
Article name: 3-phase meter Telstar MID CT Wifi
Customs tariff number: 9028.3019

Current Transducers and Accessories

CT's and Accessories 

Downloads and certificate of conformity

Here you will find data sheets, quick starter guides and other documentation for this product.