DEIF LSU-122DG Load sharing, paralleling & operation

LSU-122DG

Load sharing, paralleling & operation

DEIF’s load sharing units offer load sharing in various ways between generators and interfaces to a governor through an electronic potentiometer (EPQ96-2 or EPN110DN).

DEIF’s load sharing units offer load sharing in various ways between generators and interfaces to a governor through an electronic potentiometer (EPQ96-2 or EPN110DN).

Suitable for control of diesel and gas generators, for instance, they can control the power unit in stand-alone mode (performing frequency control) or parallel with other power units (performing frequency and power control).

The units have built-in power and frequency transducers that enable connection of external equipment. Constant power or isochronous mode is also possible. Speed control is conducted by two relays.

Variants

LSU-112DG

Frequency and power control

LSU-113DG

Frequency and power control

With -P>

LSU-114DG

Frequency and power control

With start/stop

LSU-122DG

Reactive

U and Q control

Features

Reactive. U and Q control

Built-in power and frequency transducer

Constant power or isochronous mode

LED indication of status

LED indication for activated control

35 mm DIN rail or base mountin

Function

The LSU-112DG is measuring the voltage and the

current from which the frequency and the power pro

duced by the power unit are measured. The built-in

power transducer is based on an I x cos phi principle.

The following couplings are available: – –

1W(4) –  single phase

1W3  – 1-element 3-phase, 3-wire, balanced load

If unbalanced load can be expected, an external power

transducer with an output of 4 to 20 mA can be con

nected to the LSU-112DG. In this case the built-in I x

cos phi transducer is automatically interrupted.

The power and frequency measured by each LSU

112DG are fed to two paralleling lines for comparison

with the frequency (FS) and power (PS) of the other

connected LSU-112DG.

If L1 or L2 is disconnected from the LSU-112DG at the

same time as a power unit in a power plant is discon

nected from the power line (busbar), built-in relays in

the LSU-112DG ensure that the power output and the

frequency output of the associated unit are disconnect

ed from the paralleling lines. Likewise the power and

frequency outputs are disconnected if the auxiliary

voltage to the LSU-112DG is disconnected.