ABB Modures LZ92-1 User Manual

C 0 N T E N T S
1.
2.
3.
3.1
3.1.1
3 .1. 2
3.1.3
3.2
3.2.1
3.2.2
3.3
3.4
3.4.1
3.4.2
3.5
3.6
3.7
3.8
3.9
3.10
3 .11
3.12
4.
5.
5.1
5.2
5.3
5.4
5.5
5.6
5.7
6.
6.1
6.2
6.3
6.4
6.5
6.6
6.7
7.
7.1
8.
9.
APPLICATION
MECHANICAL DESIGN
DETERMINING THE SETTINGS
Selecting the operating mode
Distance relay LZ91
Distance relay LZ92
Distance relay LZ92-l
Setting the starting units
Overcurrent starting
Underimpedance starting
k factor for the distance measuring system
Igpedance settings of the various zones
Determining the reaches of the distance zones
Determining the settings m. and N.
• • J_ 1.
Arc resistance compensation
Direction of measurement
Zone 4
Time step characteristic
Symbols and significance of the switches on the main processing unit
Main processing unit equipped for intertripping schemes
Frontplate signals
Versions of the input transformer and main processing units
CHECKING THE SHIPMENT
INSTALLATION AND WIRING
Relay location and ambient conditions
Checking the wiring
C.t. connections
P.t. connections
Auxiliary supply
Loading of tripping and signalling contacts
Opto-coupler inputs
COMMISSIONING
Checking the setting prior to commissioning
Inserting the relay and switching on the auxiliary supply
Test points on the unit EW91
Checking the load voltages and currents
Testing the distance relay using the test buttons
Testing the distance relay using a test set
Instructions for modifying relay operation
OPERATION AND MAINTENANCE
Ancillaries and~ares
TROUBLE-SHOOTING
APPENDICIES
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ABB Modures LZ92-1 Specifications

General

Brand	ABB
Model	Modures LZ92-1
Category	Relays
Language	English