ComAp NPU User Manual

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

ComAp NPU Specifications

General

Brand	ComAp
Model	NPU
Category	Relays
Language	English