Basler Electric DECS-100 - Manual (Page 25)

9287500991 Rev M DECS-100 Functional Description 3-1
SECTION 3
• FUNCTIONAL DESCRIPTION
INTRODUCTION
This section describes how the DECS-100 functions and explains its operating features. To ease
understanding, DECS-100 functions are illustrated in the block diagram of Figure 3-1. A detailed
description of each function block is provided in the paragraphs under the heading of DECS-100 Function
Blocks.
DECS-100 operating features include four operating modes, four protective functions, startup provisions,
reactive droop compensation, underfrequency compensation, and optional voltage matching. A detailed
description of each operating feature is provided in the paragraphs under the heading of DECS-100
Operating Features.
Figure 3-1. Simplified DECS-100 Block Diagram
DECS-100 FUNCTION BLOCKS
The following paragraphs describe each of the function blocks illustrated in Figure 3-1. The function of
each block is explained along with the operation of all function block inputs and outputs.
Analog Input Circuits
Seven analog voltages and current may be sensed and applied to the DECS-100.
Bus Voltage
C-phase and A-phase bus voltages are monitored at terminals B3 and B1 on units that include voltage
matching. Nominal voltages of up to 600 Vac may be sensed at these terminals. Voltage monitored at this
input is scaled and conditioned before being applied to the input of the analog-to-digital converter (ADC).
This bus voltage signal applied to the ADC is used to calculate the rms value of the bus voltage across
phases C and A (Bus V
C-A
).
Generator Voltage
Generator voltage is monitored at terminals E1 (A-phase), E2 (B-phase), and E3 (C-phase). Nominal
voltages of up to 600 Vac may be sensed at these terminals. Voltage applied to these inputs is scaled