General features
B23 is a three phase direct connected meter up to 65 A
and B24 is a three phase transformer connected for 5 A.
The B23 and B24 are measuring active energy with accuracy
class B (Cl. 1) or class C (Cl. 0.5 S) and reactive energy with
accuracy class 2. The low rated or base currents of these
products ensures high dynamic performance with superior
accuracy even at low currents. Navigation of the meters is ea-
sily done via the push-buttons below the display. The excep-
tional low power consumption of the meters, less than
1.6 VA, makes them economical in the long run-an important
feature specially for large meter populations.

Communication
Data from B23 and B24 can be collected via pulse output or
serial communication. The meters are equipped with solid
state outputs for 5-240 V AC/DC external supply. They can
be used for pulses proportionally to the measured energy
or various alarms.
The meters are also available with built-in
serial communication
interfaces for Modbus RTU (RS-485) or
M-Bus as option.

Tariff handling
The B23 and B24 have up to 4 tariffs that could be controlled
either by the 2 inputs or through serial communication.

Approvals
The B23 and B24 meters are type approved according to IEC
as well as type approved and verified according to MID.
MID is the Measure Instruments Directive 2004/22/EC from
European Commission. The type approval is according to stan-
dards that covers all relevant technical aspects of the meter.
These include climate conditions, electromagnetic compat-
ibility (EMC), electrical requirements, mechanical requirements
and accuracy.