Siemens SENTRON 3WA1 - Page 133

Description
2.7 Metering function (power metering function)
3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06
131
Power metering and monitoring device
Depending on the location of use in the power distribution system, different metering
values are required for the assessment and evaluation of efficiency.
(1)
Infeed
(2)
Transformer
(3)
Generator
(4)
Distribution
(5)
Loads, consumers
The energy values must be provided by power metering and monitoring device (PMD) or
an "equipment embedding a power metering and monitoring function (EPMF)". The
power metering function contained in the latter is equivalent to a power metering and
monitoring device and is therefore referred to as PMF (power metering and monitoring
function) in IEC 61557-12.