Parameter Specification Product Series NZM4 Brand Eaton Product Type Vacuum Contactor Number of Main Poles 3 Poles (3P) Rated Operational Voltage (Ue) Typically 7.2 kV or 12 kV (This is a key parameter that must be confirmed from the nameplate). Rated Frequency 50/60 Hz Rated Normal Current (Ie) Varies by model, common ratings are 200A, 400A, 600A (e.g., NZM4-400). Must be confirmed. Rated Making/Breaking Capacity Defined for specific duties (e.g., AC-3 for motors). High breaking capacity due to vacuum technology. Control Coil Voltage Likely 110V DC (as suggested by "VR" in the model code). Other voltages like 24V DC or 220V DC are possible. Must be confirmed. Operating Mechanism Electromagnetic, spring-operated for fast and consistent opening and closing. Dielectric Strength High, suitable for medium-voltage systems. Auxiliary Contacts Multiple normally open (NO) and normally closed (NC) contacts for control and signaling interlocking. Mounting Fixed mounting on a panel or in a switchgear compartment. Standards IEC 60470, IEC 60694, ANSI/IEEE C37.04

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Key Parameters Category Description / Value Product Line Eaton NZMH (Air Circuit Breakers) Series / Frame Size NZMH4-AE Rated Current (Iₙ) 630 A (Fixed rating) Poles 3-Pole & 4-Pole versions are available. Rated Operational Voltage (Uₑ) Up to 690 V AC, 50/60 Hz Rated Insulation Voltage (Uᵢ) 1000 V Rated Ultimate Short-Circuit Breaking Capacity (Iᶜᵘ) High, typically 85 kA to 100 kA at 400V AC (IEC 60947-2). The exact value must be verified from the technical data sheet. Trip Unit Type Standard "AS" Trip Unit • Provides fixed or semi-adjustable protection functions (overload and short-circuit). Operation Mechanism Manual stored-energy spring mechanism (allows for quick ON/OFF operation). Mounting Fixed Mounting (for bolted installation in switchgear panels). Standards Compliance IEC/EN 60947-2 Connection Primary power connections via busbars or large cable lugs. Standard Accessories The "AS" version typically includes basic indicators and possibly some built-in auxiliary contacts. A wide range of additional accessories are available, such as: • Additional Auxiliary Contacts • Undervoltage Release (UV) • Shunt Trip (ST) • Motor Operation Mechanism (for electrical closing) • Mechanical interlocks