The NSX100–630 ComPact MCCB is a compact, modular moulded-case breaker family rated for 100–630 A, designed for feeder and distribution protection with optional Micrologic electronic trip units for metering, communications, and advanced protection — full technical details and user guide are available from Schneider Electric.

NSX100–630 at a glance

• Rated current: 100 A to 630 A(covers small feeders to medium distribution circuits).
• Design: Moulded-case, modular architecture for compact switchboards and easy retrofit.
• Protection & features: Available with thermal/magnetic or Micrologic electronic trip units(adjustable long‑time/short‑time/instant/earth‑leakage, metering, event logs).
• Integration: Communication modules enable connection to building/energy management and EcoStruxure platforms for remote monitoring.

Quick comparison (NSX100–630 vs typical alternatives)

Attribute	NSX100–630 (ComPact)	MasterPact ACB	TeSys / Motor CB
Rated current	100–630 A	Up to 6300 A	Motor‑rated up to several hundred A
Use case	Feeders, distribution panels	Main incomers, large switchboards	Motor feeders, starters
Trip options	Thermal/magnetic; Micrologic electronic	Advanced electronic trip units	Motor protection / overload
Communications	Optional modules for BMS/SCADA	Full metering & networked options	Limited; via gateways
Form factor	Compact, modular	Larger, high breaking capacity	Compact for motor control

(Use NSX for compact feeder protection; MasterPact for high‑capacity mains.)

Selection checklist (practical)

• Match continuous load: choose breaker rating ≥ continuous current. Derate for ambient temperature.
• Fault level: verify Icu/Ics ≥ prospective short‑circuit current at installation point.
• Trip unit: pick Micrologic if you need metering, event logs, or remote settings.
• Coordination: run a selectivity study with upstream ACBs and downstream protection.

Installation, commissioning & maintenance

• Pre‑commission tests: insulation resistance, polarity, mechanical operation, and primary injection for trip verification.
• Wiring & torque: follow Schneider terminal torque and cable sizing in the user guide.
• Maintenance: periodic mechanical operation, contact inspection, thermal imaging under load, firmware updates for electronic trip units.

Risks, trade‑offs & recommendations

• Oversizing reduces selectivity — prefer correct sizing and coordination.
• Digital features add cyber exposure — apply network segmentation and device authentication when enabling communications.
• Spare strategy: keep spare trip modules and accessories for critical feeders