Technical Parameters Parameter Specification Product Series MPT / MET Series (Thermal Overload Relay) Model Decoding MPET4-10R • MPET: Series and frame size designation. • 4: Likely indicates the current range setting scale or frame size level (e.g., covering a specific FLA range). • 10: Trip Class 10. This means it will trip within 10 seconds at 720% of its set current. • R: Manual Reset operation. Rated Operational Current (Iᵉ) Depends on the specific "4" frame. Typical range for an MPET4 is approximately 0.11A - 25A (or similar). The exact adjustable range is critical and must be verified. Trip Class Class 10 (Standard for general-purpose motors). Poles / Protected Phases 3 Poles (for three-phase motor protection). Ambient Temperature Compensation Yes, typically for -20°C to +60°C. Trip Current Adjustment Continuous dial adjustment within the relay's specified range (e.g., 0.11 - 0.16A up to 18 - 25A). Auxiliary Contacts Typically: • 1 NO (97-98) - Can be used for trip indication. • 1 NC (95-96) - Connected to break the contactor coil circuit. Configuration may vary. Reset Mode Manual Reset (R). Requires physical push-button reset after a trip. Mounting Direct snap-on/plug-on mounting to the side of compatible ABB contactors (e.g., AF09, AF12, AF16, etc.). Can also be mounted separately with a bus kit. Compatible Contactors ABB A, AF, AX series of corresponding sizes. Standards & Approvals IEC/EN 60947-4-1, UL 508, CSA C22.2 No. 14, CE, CCC. Electrical Durability ≥ 5,000 operating cycles (at rated current). Mechanical Durability ≥ 10,000 operating cycles. Screw Terminals For main power (L1, L2, L3 / T1, T2, T3) and auxiliary contacts. Insulation Voltage 690V / 1000V (Ui / Ue). Utilization Category AC-3 (Squirrel cage motor switching).