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A U TO M AT I C T R A N S F E R S W I TC H , OT M _ C _ 2 1 D
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Symbols & Terms
Risk of Electric shock: Warns about a situation where a hazardous voltage may cause
physical injury to a person or damage to equipment.
General warning: Warns about a situation where something other than electrical
equipment may cause physical injury to a person or damage to equipment.
Caution: Provides important information or warns about a situation that may have a
detrimental effect on equipment.
Information: Provides important information about the equipment.
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Explanations of abreviations and terms
OTM_C_21D
LN1-Switch I
LN2-Switch II
EMERG OFF
(fire control system)
AUTO
Remote test
Ts
TBs
OV
UV
Table 1. Explanations of abbreviations and terms
Automatic transfer switch, the type name
Power supply line, e.g. the primary line
Power supply line, e.g. the secondary line used in emergency cases
Used to drive the automatic transfer switch transfers to the "O" position when
receiving EMRG OFF signal.
Automatic mode
A sequence to test the functionality of the automatic transfer switch
Switching delay
Back switching delay
Adjustable overvoltage threshold
Adjustable undervoltage threshold
3
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