Power Electronics Standalone NB 120 - Page 7

POWER ELECTRONICS
NB 120
ACRONYMS
7
ACRONYM
MEANING
PV
Photovoltaic energy
RCD
Residual Current Device
RCM
Residual Current Monitor
RFID
Radio Frequency Identification
SOC
State Of Charge – referred to battery
SOH
State Of Health – referred to battery. It compares the actual state of the battery to its initial
conditions. It is measured in percentage
STO
Safe Torque Off
TN
Grid system where the power supply is grounded, and the electrical equipment system is brought
to the same ground through the neutral connector.
TT
Grid system where both the power supply and the electrical devices are connected to the ground
via separate connections
UPS
Uninterruptible Power Supply
VSD / VFD
Variable Speed Drive, Variable Frequency Drive. Both terms are used