Description

ATO ASW400 reversing contactor is used to change the direction of rotation in alternating current motors, start them gently and to monitor their load. Widely used in auto electric winch, telecommunication equiment, engineering machinery and other electric control system.

Features

400 amps rated load current of contact circuit.
2NO and 2NC contact form.
12V, 24V, 48V DC coil rated voltage for selection.
Main contact voltage drop at 100A, not above 100mV.
Mechanical life up to 300 thousand times.

400A DC Reversing Contactor Specifications

Basics	Model	ATO-ASW400-2Z
Body Size	51114160 mm
Weight	3150 g
Technical Parameters	Coil Rated Voltage	12V/24V/48V
Rated Load Voltage	12~60V DC
Contact Circuit Rated Load Current	400 A
Contact Form	2NO and 2NC
Overload Current	≤7 le
Coil Power	≤24 W
Main Contact Voltage Drop at 100A Load	≤100 mV
The Allowed Range of Coil Voltage	±20%
Pull-In Time (N/O Contacts to Open)	≤30 ms
Drop-Out Time (N/O Contact to Close)	≤20 ms
Insulation Resistance	≥50 MΩ
Dielectric Withstanding Voltage	50Hz/60Hz 1000VAC/Min
Auxiliary Contact Rated Load (Option)	2A/48VDC, 5A/24VDC
Electric Life	Continuous 20000 times
Mechanical Life	300 thousand times
Environment	Environmental Proctection	IP 50
Operating Temperature	-25℃~55℃
Operating Humidity	5~95% RH

DC Reversing Contactor Circuit Diagram
Installation Diagram (Unit: mm)

Details

Tips: Reasons for the contacts of contactor being unable to separate after powering off

Control line of the coil is too long, the residual voltage is too large due to the influence of lead capacitance, which is enough to maintain a close situation for the iron core. As a result, the contacts can’t be separated.
Coil of the contactor has burnt out, deformed coil skeleton seizes the movable iron core, which makes it unable to move, thus the contacts can’t be separated.
The contact has been fused.
The contactor has auto-lock function, and the function is normal.