Components; Ac Circuit Board (Inverter Comperator Card); Sine Card; Disconnect Facilities - Conergy IPG Serie Instrucciones De Servicio

3 Technical description
3.4
3.4.1
3.4.2
3.4.3
16
(3) DC power circuit breaker
(4) NH disconnector for overvoltage protection
(5) NH disconnector (only Conergy IPG 280K)
(6) Overvoltage arrester
(7) DC + connection bar
(8) DC - connection bar
(9) AC PE connection bar
(10) AC N connection bar
(11) AC connection bar L3
(12) AC connection bar L2
(13) AC connection bar L1
(14) Auxiliary power supply connections L, N, PE

Components

Central inverters with a lower level of performance (Conergy IPG
40K–60K) differ from the higher levels of performance (Conergy
IPG 80K–280K) in the arrangement of their assemblies and
components. The transformerless design of the Conergy IPG 300K
makes it different from all levels of performance.

AC circuit board (inverter comperator card)

The three AC circuit boards regulate the AC voltages and currents.
Each of the AC circuit boards is responsible for one phase. They
work independently of each other.

Sine card

The sine card checks the direction of the rotary field of the supply
network. It measures the frequency and compares it with the
specified reference frequency. The sine card also checks the
frequency tolerances. If all the measured values are within
specification, the sine card issues an approval for connection to
the grid.

Disconnect facilities

An external DC circuit breaker must be separately connected
upstream to all Conergy IPG series central inverters in order to
disconnect the central inverter from the solar generator in the
event of damage or for inspections. Conergy recommends that an
overvoltage protection should be provided.
Disconnection from the grid (on the AC side) must be made
possible by means of a disconnector provided by the customer.
This is essential, for example, to be able to switch and deenergise
the device for maintenance work.
Operating manual Conergy IPG series central inverters