Interface And Settings - ABB OTM_C_21D Installation And Operating Instructions Manual

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A U T O M AT I C T R A N S F E R S W I T C H , O T M _ C _ 2 1 D
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Interface and Settings

Buttons
Figure 10. Buttons
Button Function
I ON Transfer to LN1
O OFF Transfer to 0 position
II ON Transfer to LN2
Auto Select autiomatic mode, fault clearance and reset
Table 2. Buttons
LEDs
LED Display
LN1/LN2 ON
Blinking
OFF
I/II ON
OFF
Blinking
Auto ON
Blinking
OFF
EMRG OFF ON
OFF
Table 3. LEDs
Remarks
Only available in automatic mode and remote
test mode
Figure 11. LEDs
Status description
Sourse available
Overvoltage, undervoltage or phase loss
Source not available
Switch I or II closed
Switch I or II open
Switching failure
Transfer switch in automatic mode
Transfer switch in test mode or invalid setting
Transfer switch in manual mode
Receiving emergency signals
No emergency signals input
Transfer using buttons bypass
switching and back switching delays.