NPU, SW Version 1.8,
©
ComAp, September 2003
NPU-1.8r2.PDF 2
1. Contents
1.
Contents
2
2.
Technical Specification
3
NPU Technical Specification
4
NPU Mechanical Design
5
3.
Installation
6
Power Supply
6
Analog Inputs
6
Output Relays
6
The NPU Unit Wiring Diagram
7
Connection NPU Unit to phase-to-neutral voltage
7
Connection NPU Unit to phase-to-phase voltage
8
4.
Function
9
Protection types
9
Overvoltage protection
9
Undervoltage protection
9
Overfrequency protection
9
Underfrequency protection
9
Voltage assymetry protection
9
Vector shift supervision
9
Phase sequence supervision
10
Frequency measurement
10
Internal watchdog
10
Output Relays
10
Example: Evaluation of under voltage protection
11
Vector Shift Protection
12
5.
Settings
14
Buttons
14
Display and LEDs
14
Parameters settings
14
6.
Displayed Quantities and Parameters
15
Set A:
15
Default setting
16
Set B:
17
Default setting
17
7.
Order codes
19
