ABB OTM C 21D User Manual

9
AUTOMATIC TRANSFER SWITCH, OTM_C_21D
OTM_C21D must be in automatic mode and the
“AUTO” LED is on in order that the switch can
perform automatic transfer cycles according to
the pre-set operating mode.
To operate the switch electrically:
• If the handle inserted
1. Press handle locking clip and remove the handle
from the switch.
2. Press “AUTO” button and the “AUTO” LED will
be ON, indicating automatic mode.
Figure 6. Selecting the automatic transfer OTM_C_21D, switch to Auto Mode
2
1
3
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3.2 Automatic operation
• If handle is not inserted
1. If “AUTO” LED blinks, press “AUTO” button and
the “AUTO” LED will be ON, indicating auto-
matic mode.
2. Automatic operation includes three operating
modes: Line 1 priority (factory default setting),
No line priority, and manual return mode.

ABB OTM C 21D Specifications

General

Brand	ABB
Model	OTM C 21D
Category	Switch
Language	English