Page 93 - Changeover switch

ABB TRANSFER AND CHANGE-OVER SWITCHES 93

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Technical features and functionality

Compact ATS

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Automatic transfer switches functionality
OTM_C20D_ OTM_C21D_
OTM_C_D products overview Fixed version Adjustable version
Features
Single phase (2 poles) 220~240+/-20% 220~240+/-20%
Rated operational voltage U e Three phase (3 and 4 poles) 380~415+/-20% 380~415+/-20%
Rated frequency 50 / 60 Hz +/- 10%
Voltage sensing precision 5% 3% 04
6 kV
Rated impulse withstand voltage, U imp
Overvoltage category III
Pollution degree 3
Protection rating for the front panel IP20
Operating temperature – 20...+ 55 °C
Transportation and storage temperature – 25...+ 70 °C
Altitude Max. 2000m
Humidity With condensation 50% at 40 °C, 90% at 20°C
Humidity Without condensation 50% at 40 °C, 90% at 20°C

Operation Types
Manual operation with handle x x
Local operation with front panel keypad x
Automatic transfer switching equipment (ATSE) x x
Applications
Transfer between two Transformers x x
Transfer between a Transformers and a generator x
Operation modes
Automatic transfer and back-switching operation x x
Automatic transfer and manual back-switching operation x
Source failure detections
No voltage x x
Undervoltage 0.7-0.95 U e
Overvoltage 1.05-1.3 U e
Phase missing x x
Voltage unbalance
Invalid frequency
Configuration
By DIP switches x x
By rotary switches x
Two power status display x x
Two switches status display x x
Auto status display x x
Alarm display x x