DM1z series 1P, 2P, 3P, 4P DC moulded case circuit breakers are suitable for DC system no more than DC 1000V, rated current 10A ~1250A, with protections of overload, short circuit, under-voltage and etc, able to protect line and power equipment from being damaged by over-voltage or over-current, widel used in power generation, transmission and distribution, new energy, communication, building fields, etc.
| Weight | 2 kg |
|---|---|
| Dimensions | 25 × 25 × 25 cm |
| Rated Current |
100A, 125A, 200A, 250A, 400A, 630A, 800A, 1250A |
| Poles |
2P, 3P, 4P |
Download official engineering datasheets, certified test standards (IEC / UL / CE), wiring diagrams, and dimensional drawings for DC MCCB 1P 2P.
Pure engineering specifications, tripping curve parameters, and electrical selection guidance for panel builders and system designers.
Thermal-magnetic trip units provide fixed or adjustable bimetallic overload and electromagnetic instantaneous short-circuit protection, ideal for standard industrial power distribution. Electronic microprocessor trip units offer precise digital dials for L (Long-time delay overload), S (Short-time delay short-circuit), I (Instantaneous short-circuit), and G (Ground-fault protection), delivering total time-current selectivity in modern switchgear.
Icu represents the absolute maximum fault current the breaker can safely interrupt, after which inspection or replacement may be needed. Ics represents the operational breaking capacity (50%, 75%, or 100% of Icu) that the breaker can clear repeatedly and remain fully operational without performance degradation. In critical healthcare, data center, and continuous industrial applications, specify breakers with Ics = 100% Icu.
A 4P breaker with a switched neutral is required in systems with dual power sources (generator / utility ATS transfer) to prevent circulating neutral currents, in IT distribution networks, and in commercial installations with heavy non-linear harmonic loads (LED drivers, variable speed drives) where neutral conductor current can exceed phase currents.
Direct or extended door rotary handles are specified when the MCCB is enclosed inside switchgear cubicles, providing padlocking and door-interlock safety. Motor operating mechanisms (electric operators) are required for automated SCADA control, remote PLC open/close operations, and automatic transfer switch (ATS) integration.
Standard front connection lugs accept copper or aluminum compression terminals and busbar connections. For high-density panel boards, extended spreader terminals, rear connection studs, and plug-in / draw-out base cassettes are available to facilitate rapid maintenance and modular swap-out.
