Features; Operation And Protection Features - ABB PVS300 Product Manual

Features

Operation and protection features

Feature
Automatic operation
DC string fuses,
monitored
DC surge protection
device, monitored
DC switch
DC reverse polarity,
monitored
DC ground fault
monitoring
MPPT
Residual current detection In accordance with VDE0126-1-1; the inverter has a DC and AC
AC Grid monitoring with
anti-islanding
AC Over current trip,
monitored
Operation basics and hardware description 27
Description/Operation
The inverter wakes up and goes to sleep automatically depending
on the solar radiation conditions. It connects and disconnects to
the electrical grid automatically according to country
requirements. The inverter studies the system operations; it
generates messages and production data information to the user.
String fuses provide protection for solar modules and string
cabling against earth faults originating from solar side installation
errors or faulty components.
A surge protection device (SPD) protects the inverter from
induced voltage spikes, for example caused by thunderstorms
close to the installation location. The inverter monitors SPD
cartridges and informs the user when the cartridge must be
replaced.
The manually-operated DC power switch which can disconnect
the inverter from solar modules under full load conditions. When
turned on, the DC switch interlocks the inverter's bottom cover
and front cover so that they cannot be removed.
The inverter has a short circuit diode between the DC terminals to
protect the internal electronics from reverse voltages. In case of
reversed –dc and +dc connection the full short circuit current will
flow through the diode, setting the DC voltage to zero. The
inverter informs the user about reversed DC connection.
In accordance with VDE0126-1-1; the inverter monitors the
impedance between ground and DC terminals before grid
connection can be established.
Maximum power point tracking is a software function which
operates the inverter automatically at the optimal operation point
of connected solar modules. PVS300-TL inverters have one MPP
tracker.
sensitive residual current monitoring unit (RCMU) which
measures and sums the currents of L and N conductors. If
residual currents (DC or AC) are detected, the inverter
disconnects from the grid.
In accordance with VDE0126-1-1; the PVSD300 monitors the
voltage and frequency of the electrical grid and can detect if the
grid is operating with tolerances. The inverter also stops power
conversion and disconnects from grid when missing electrical grid
is detected (anti-islanding).
The inverter hardware has an over current trip function. The
inverter informs the user if over current trip is performed.