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AUTOM ATIC CONTROL U N IT, OM D8 0 0
AU TO M AT I C CO N T R O L U N I T, O M D 8 0 0
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1 Introduction
This manual describes the installation and the basic operation of the OMD800 automatic control unit. The in-
structive part is followed by a section on available accessories.
Caution:
provides important information or warns about a situation that may have a
detrimental effect on equipment.
General warning: warns about a situation where something other than electrical equipment may
cause physical injury to a person or damage to equipment.
Hazardous voltage: warns about a situation where a hazardous voltage may cause physical in-
jury to a person or damage to equipment.
Information: provides important information about the equipment.
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1.2 Explanations of abbreviations and terms
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1.1 Use of symbols
OMD
The control unit of automatic transfer switching equipment, common type name for
the automatic control unit
OMD800
The automatic control unit, high version with communication and display
DPS
Modbus RTU
Dual power source
Bus communication protocol
LN1-Switch I
Power supply line, eg. the primary line
LN2-Switch II
Power supply line, eg. the secondary line used in emergency cases
Test sequence
A sequence to test the functionality of the OMD and the connected change-over
switch
Ts
Switching delay
Tt
Delay on transfer
Ds
Dead band I to II delay
TBs
Back switching delay
DBs
Dead band II to I delay
Gs
Generator stop delay
Содержание OMD800
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