Overview
Manuals
Core Functional Role
Features:
- UNDERVOLTAGE RELEASE 220-240V AC-DC E1.2..E6.2-XT7-XT7M
- Loose accessory or configurable factory fitment
- Low Voltage Products and Systems
When the control power supply voltage drops significantly, experiences a momentary power outage, or falls below 35% to 70% of its rated value, this accessory will automatically force the circuit breaker to trip, thereby disconnecting the main power supply circuit and preventing downstream expensive industrial motors, transformers, and other heavy equipment from overheating and burning out due to single-phase operation or low voltage.
This model is compatible with various control voltages of 220-240V AC/DC and is an indispensable power quality and safety protection component in modern large industrial distribution boxes and intelligent electrical control cabinets.
The 1SDA073700R1 ABB Low Voltage Power Breaker may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
ABB 1SDA073700R1 Low Voltage Power Breaker manual(Datasheets), Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Unlike parallel trip units (which disconnect the circuit breaker when energized), undervoltage trip units are a fail-safe protection mechanism.
Voltage Drop Protection: It monitors the control circuit voltage. If the supply voltage drops below a preset threshold (typically 35% to 70% of the rated voltage), the coil automatically disconnects, immediately forcing the circuit breaker to trip.
Safety Start Interlock: The circuit breaker cannot be closed again until the control voltage is fully restored to normal. This prevents downstream motors or industrial machinery from spontaneously restarting in dangerous low-voltage or power outage recovery situations.
Emergency Stop Circuit: It is typically connected in series with a series of normally closed (NC) emergency stop buttons or safety relays. Disconnecting this circuit cuts off the power supply to the coil, immediately disconnecting the main circuit breaker.
