OOHMAGE OMM7LE Residual Current Operated Circuit Breaker — Compact MCCB with Metering & Comms
The OOHMAGE OMM7LE is a compact residual-current operated mccb for AC 400 V three-phase systems (4P, 3P+N). It blends precise leakage protection with cost control, metering, and communication functions to simplify distribution design and O&M. With Icu/Ics 50/35 kA @ 400 V and wide current bands up to 800 A, this mccb 3 phase solution fits feeder panels in commercial buildings, factories, and energy-managed facilities.
Highlights
- Cost control & metering built-in: Onboard measurement channels support kWh allocation, demand tracking and alarm thresholds—reducing add-on meters and wiring in mccb boards.
- Communication function: Electronic trip unit ready for remote monitoring/parameter read-out (SCADA/BMS integration via optional modules).
- Small volume, low temperature rise: Enables denser panel layouts while maintaining conductor temperature margins.
- Residual-current protection: Electronic release with adjustable IΔn settings for personnel/equipment safety and faster fault localization.
- OOHMAGE reliability: Stable trip curves, robust contact system, and consistent performance across the whole specification range.
Engineering notes
- Selectivity & coordination: Use 50/35 kA tier to coordinate with upstream incomers and downstream feeders; stage IΔn and time delays to avoid nuisance trips on capacitive inrush.
- Thermal design: Compact body and low ΔT allow tighter busbar spacing; still size conductors for continuous load plus harmonic heating where VFDs/rectifiers are present.
- Integration: Map metering points to BMS tags (kWh, demand, IΔn status) for automated cost allocation and maintenance alarms.
Technical Parameters
| Residual Current Operated Circuit Breaker OMM7LE- | 250 | 400/630 | 800 | ||||
| Number of poles | 4P(3P+N) | ||||||
| Rated current(A) | 50A~125A 100A~250A | 160A~400A 252A~630A | 252A~630A 320A~800A | ||||
| Rated voltage(V) | AC400V | ||||||
| Rated insulation voltage (V) | AC1000V | ||||||
| Short circuit breaking capacity (kA)Icu/lcs | AC400V | 50/35 | |||||
| Number of operation cycles | Power-on | 1000 | 1000 | 500 | |||
| Power-off | 7000 | 4000 | 2500 | ||||
Outline dimension(mm) b-a-ca | 4P(3P+N) | 165*140*131 | 257*184*173 | 275.5*280*169 | |||
| Automatic release device | Electronic type | ||||||
Why OOHMAGE
Equip your next mccb feeder with OOHMAGE OMM7LE to combine leakage protection, metering, and communications in one frame. Request the coordination curves and BMS register map to finalize settings and accelerate panel approval.
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