CHM1E-250H 3300 Electronic molded case circuit breaker

 Product Description:
1. Core protection capability
Overload protection: Equipped with a built-in thermal magnetic trip system, it accurately senses the overload current of the circuit. When the current continues to exceed the rated value, the thermal element slowly heats up and triggers the trip, avoiding long-term overheating and aging of the circuit;
Short circuit protection: The electromagnetic trip module responds in milliseconds (≤ 0.1s), instantly disconnects when the short-circuit current reaches the threshold, blocks the spread of arc, and prevents serious accidents such as distribution box burning and equipment explosion;
Optional extended protection: Some models support under voltage, over voltage, and ground fault protection, suitable for precision equipment with high power supply quality requirements (such as PLC, frequency converter).
2. Industrial grade durability
Contact system: using silver alloy contacts, wear-resistant and arc resistant, with a breaking frequency of over 10000 times, and long-term high-frequency operation without failure;
Shell material: flame-retardant engineering plastic, impact resistant, high temperature resistant (able to withstand short-term high temperatures of 120 ℃), suitable for complex environments such as factory workshops and outdoor distribution boxes;
Sealed design: IP30 protection level, dust-proof and splash proof, to prevent dust and water vapor from entering the interior and causing short circuits.

 User Value
Cost reduction: Avoid equipment burnout and production line shutdown caused by short circuits/overloads, and reduce maintenance and shutdown losses;
Worry free: industrial grade durability+multiple protections, no need for frequent maintenance, long-term stable operation;
Compliance: Complies with national standards such as GB/T 14048.2 and meets the requirements of power distribution specifications for industrial safety production.

Installation and maintenance recommendations
Before installation, confirm that the voltage/current of the circuit matches the parameters of the circuit breaker, and the three-phase wiring should correspond to the phase sequence;
The drawer type model should ensure that the drawer is in close contact with the cabinet to avoid virtual connection and heat generation;
Check the contacts and wiring terminals every six months, clean the dust, and avoid excessive contact resistance;
After short circuit breaking, the contact status should be checked, and if there is erosion, it should be replaced in a timely manner.