Description
Features
- DC 12-900V rated load voltage of contact circuit.
- SPST-NO of contact form, 12 volt, 24 volt coil for selecting.
- Main contact voltage drop at 250A, not above 100mV.
- The connection of contact and coil need to be nonpolarity.
- Efficient coil, retentive power is only 2-2.3W, counter electromotive force is 0V.
- The joint way of the coil is very convenient.
- The coil has no counter force of electromagnetism.
- Compare to the similar products, this product is smallest and lightest.
Specifications
| Basics | Model | ATO-ADH250 |
| Dimension | 80 x 65 x 74 mm | |
| Weight | 480 g | |
| Main Contact Parameters | Contact Form | 1 NO |
| Leading-Out | M10 Internal thread | |
| Rated Load Current | 250 A | |
| Rated Load Voltage | 12 – 900V DC | |
| Maximum Switching Current | 2000A 320V DC (≥1 times) | |
| Maximum Switching Power | 640 kW | |
| Auxiliary Contact Parameters | Aux. Contact Type | 1NO/1NC/1CO |
| Rated Current | 5A | |
| Maximum Breaking Voltage | 120V DC | |
| Coil Parameters | Standard Type Voltage | 12/24V DC |
| Work Voltage | 8~36V | |
| Max Voltage | 36 V | |
| Coil Resistance | 3.1Ω | |
| Average Holding Current | 0.14 A | |
| Steady State Power | 1.7~2 W | |
| Actuation Time | ≤30 ms | |
| Release Time | ≤10 ms | |
| Bounce Time | ≤5 ms | |
| Mechanical Specification | Stability | 196 m/s2 (20G) |
| Strength | 490 m/s2 (50G) | |
| Vibration | 80 ~2000Hz 98m/s2 (20G) | |
| IP Grade | IP67 | |
| Environment | Operating Temperature | -40℃~85℃ |
| Operating Humidity | 5~95% RH |
Installation Diagram (Unit: mm)
High Voltage DC Contactor Coil Schematic
Details
Tips: The contactor makes large noise when it works, how to solve?
Possible causes of the fault
- The contactor works in high temperature for a long time.
- The contactor is frequently operated.
- Contact over range is too small.
- The contact surface has impurities or is not smooth.
- Pressure of contact spring is too small.
- The three phase contact can’t contact synchronously; short circuit at the load side.
Maintenance method
- Measure with a multimeter whether the power supply voltage of a contactor coil is lower than the required rated voltage, if lower, find causes on the circuit and adjust the voltage to the normal value.
- Grind the suction face of the contactor with fine sand paper, clean up the sundries, spray few oil on the end face when necessary and then reassemble.
- Reassemble and repair the contactor’s action mechanism.
- Weld the short-circuit ring and connect again.
- Replace the contactor’s iron core.
- Reset the spring pressure of the contactor to a proper value.
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