AMT B2x-Fx (active and reactive en.), multirate, RTC, comm. modules, up to 65, 100 and 120 A

Three-phase multifunctional static electricity meters AMT B2x-FxxTxIx are determined for measurement of active, reactive and apparent electric energy, instantaneous active, reactive and apparent power for consumption and supply, maximum demand for active, reactive and apparent energy, voltage, current and power factor in 3-phase 4-wires networks in direct and semidirect connection. They enable measurement of energy in rates controlled by internal clock (up to 4 rates) or externally controlled in two rates. The measured values stored into special registers according to the OBIS codes are displayed on LCD in cyclic or step mode. The electricity meters can be parametrized and readout by using optical probe AMOS type and software supplied by the manufacturer. The test pulses are indicated by red LEDs, they are proportional to the active and reactive consumed energy. Electricity meters can be produced in version with summary measuring mode (using a mechanical register) or in version with separate mode (measuring of consumption and supply).


  • Measuring of energy, power, voltage, current, power factor... (+A, -A, +Ri, -Ri, +Rc, -Rc, +R, -R, +S, -S, +P, -P, Pmax, U, I, cos j...);
  • Measurement of active energy per phases L1, L2, L3;
  • Historical records of the selected register contents created at the end of a calendar month - up to 15 month records;
  • Event records (about influence of magnetic field, missing voltage, covers removal,...) – number of events with date of their occurrence;
  • Data record in three independent profiles with selectable channels (20 channels);
  • Passive impulse SO outputs (particularly for active and reactive energy);
  • Communication interface: optical and RS485;
  • Welded case on a customer request;
  • Compliance with IEC/EN 62052-11, IEC/EN 62053-21; EN 50470-1, EN 50470-3 and with requirements of European Parliament and EC Directive 2014/32/EU (MID);
  • Electricity meter is delivered with conformity assessment (initial verification) for active energy billing purposes.

Technical data

Precision class active / reactive energy A, B, (MID), 2, 1, / 3 and 2
Reference voltage [V] 3 x 230/400 (-20%,+15%)
Reference frequency [Hz] 50 (± 2 %)
Reference current Iref / Nominal current In [A]
5 and 10 /5
Transient current Itr [A]
direct/semidirect connection
0,5 and 1 / 0,25
Starting current Ist [mA]
≤ 10
Minimal current Imin [A]
direct/semidirect connection
0,25 and 0,5 / 0,05
Maximal current Imax [A] 
direct/semidirect connection
65 (case C), 100 (case E), 120 (case 9) / 10
Power consumption - voltage circuit [VA/W] Buck source without RS485: 0,88/ 0,33 for phase 
Buck source with transformer for RS485 ≤2,05/ 1,32 (L1); 0,88/ 0,33 (L2 and L3)
MYRRA source (also for RS485) ≤ 1,18 / 0,60 for phase
Buck source with MYRRA for RS485 ≤ 1,42/ 0,55 in L1, 1,10/ 0,40 (L2, L3)
Power consumptioncurrent circuit [VA] ≤ 0,01 at Iref
Impulse constatnt [imp/kWh] 
for test output kTO / impulse output kSO
1000 (setable by manufacturer from 1 to 30000) / 1000 (kTO/x; x = 1 – 10)
Transistor output SO 24 V / 30 mA
Operating temperature  -40 °C up to +70 °C
Mean temperature coefficient [%/K] ≤ 0,04
Terminals [mm]
current ; voltage ; auxiliary case 
up to 65 A / up to 100 A / up to 120 A
ø 6 ; ø 3 ; ø 3  ø 8,2 ; ø 3 ; ø 3 ø 9,5;  ø 3 ; ø 3
Degree of protection IP53 for case E and 9;
IP51 for meter, IP20 for terminal block in case C
Fixing holes distance - w x h [mm] 150 x 215-230
Meter dimensions - w x h/h´x d [mm] 126x135x59 mm (case C), 177x251x60 (case E and 9) 
Weight [kg] ≤ 1,23