User manual

Technical details

n Each characteristic curve is defined by 2 to 8 nodes.

n A node is defined by the output power P of the inverter (x-axis)

and the associated phase shift (y-axis).

n The phase shift can be set over a range of 0.95 (overexcitation)

through 1.00 (no phase shift) to 0.95 (underexcitation).

n The type of phase shift is shown in the graph using arrow sym-

bols defined as follows (defined from the point of view of the

inverter):

Overexcitation, inductive

Underexcitation, capacitive

n The 3 characteristic curves available for selection have the fol-

lowing properties:

‘Default. char. curve’

: pre-defined according to the selected

country (example in Fig. left).

‘Char. curve φ = 1’

: pre-defined with cos φ = constantly 1.00.

This characteristic curve must be selected if no reactive power

control is to be performed on the device.

‘Enter char. curve’

: The number of nodes and their x/y values

can be configured. Exceptions: the first node is always located

at x (P %) = 0 % and the last node is always located at

x (P %) = 100 %.

All parameters

Service technicians can use this menu item for changing additional

MSD parameters.

3.4 Cooling

The internal temperature control system prevents excessive operating temperatures. When the

internal temperature is too high, the inverter adjusts the power consumption from the solar mod-

ules to reduce the heat dissipation and operating temperature.

The inverter is convection cooled via fins on the front and rear side. A maintenance-free fan circu-

lates the heat within the closed casing evenly over the entire surface of the casing.

3.5

Grid monitoring

The inverter constantly monitors the mains grid parameters while feeding the grid. If the grid devi-

ates from the legally prescribed specifications then the inverter automatically switches off. When the

grid conforms to the legally prescribed specifications then the inverter automatically switches on

again.

3.6 Data communication

The device has the following communication interfaces:

n 1x RJ45 socket (Ethernet for TCP/IP network) for communication, e. g. with a central data server

n 2x RJ45 sockets (RS485 bus) for communication with external devices, e. g. a data logger

747.431 | Z08 | 2014-01-31