Circuit breaker

 here is the product description for this item:

### Posmith Electric Moulded Case Circuit Breaker (MCCB)

This is a heavy-duty industrial-grade Moulded Case Circuit Breaker (MCCB) engineered for robust electrical protection against overloads and short circuits, particularly optimized for high-voltage DC networks like solar photovoltaic (PV) systems, energy storage, or industrial power distributions.

 * **Brand:** Posmith Electric

 * **Model:** QM1–125L/2300Z

 * **Type:** Moulded Case Circuit Breaker (MCCB)

### Technical Specifications & Features

 * **Current Rating (I_n):** 125\text{A} – Built to handle high-capacity current distribution safely.

 * **Operational Voltage (U_e):** \text{DC } 1000\text{V} – Explicitly rated for high-voltage direct current systems.

 * **Insulation Voltage (U_i) & Impulse Withstand (U_{imp}):** Rated for an insulation threshold of 1000\text{V} and an impulse withstand voltage of 8\text{kV}, ensuring structural integrity against sudden voltage surges.

 * **Instantaneous Tripping Current (I_i):** 10I_n (Trips instantly at 10 times the rated current for rapid short-circuit isolation).

 * **Breaking Capacity:**

   * **I_{cu} (Ultimate Breaking Capacity):** 25\text{kA}

   * **I_{cs} (Service Breaking Capacity):** 15\text{kA}

 * **Standard Compliance:** Conforms to the international standard **IEC60947-2** for low-voltage switchgear and controlgear.

 * **Physical Design:**

   * 2-Pole configuration housed in a durable, flame-retardant casing.

   * Features a prominent manual grey/red ON/OFF toggle switch.

   * Includes a dedicated red manual **Test Trip Button** located just below the toggle mechanism to verify operational safety.