Basler Electric Relay BE1-50/51B-207 Overcurrent Relay

The DECS-200N is a very compact Negative Forcing Digital Excitation Control System.

This compact design accommodates 63 Vdc and 125 Vdc applications up to 20 Adc

continuously. The on-board six-thyristor controlled rectifier bridge offers the highest

system performance possible, making the DECS-200N ideal for providing exceptional

system response, which makes it suitable for applications requiring power system

stabilizers.

The DECS-200N is a multi-microprocessor based Negative

Forcing Digital Excitation Control System designed into one

complete compact package. This space-saving design

consists of all the functionality needed to control, limit and

protect a generator from operating outside the machine's

capability. This is accomplished by the DECS-200N's

impressive control algorithm coupled with a versatile 20Adc

6 SCR power bridge. The input of the power bridge can be

fed by a 50 to 500 Hz, single or three phase voltage source,

depending on the desired excitation levels it is intended to

support.

The DECS-200N also incoporates four control modes of

operation: Automatic Voltage Regulation (AVR), Field

Current Regulation (FCR, Manual), Volt Amp Reactive (Var)

and Power Factor (PF) control. In addition to these control

modes, the DECS-200N provides the ability for all non-active

control modes to follow the set point of the active mode,

permitting bumpless transfer between any other modes. For

applications requiring redundancy, the DECS-200N can

communicate unit-to-unit, allowing the backup DECS-200N

to automatically follow the active unit's set point in the event

it is necessary to switch to the backup DECS-200N. Commu

nications with a PC is possible via a front panel RS-232 port

for local programming and metering. Provisions for remote

control are also available using contact inputs and the RS

485 port via Modbus protocol. The DECS-200N offers all of

the features, functionality, flexibility, and programmability for

use in new installations and in retrofit applications.