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ComAp NPU User Manual
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NPU, SW Version 1.8,
©
ComAp, September 2003
NPU-1.8r2.PDF
8
Connection NPU Unit to phase-to
-phase voltage
1
1
14
12
21
24
22
31
34
32
41
44
42
A1
PE
A2
POWE
R SUPPL
Y
SWITCHED CONT
ACTS
OF
SIGNAL R
ELA
YS
CONNEC
T
ION NPU
UNIT T
O PHASE
-T
O-PHASE VOL
T
A
GE
L1
L2
L3
PE
2L1 3L1
1L1 2L2
3L2
1L2 2L3
3L3
1L3
7
9
Table of Contents
1 Contents
2
Table of 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
18
7 Order Codes
19
4
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ComAp NPU Specifications
General
Brand
ComAp
Model
NPU
Category
Relays
Language
English
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