Parameter Specification Product Family Accessory for ABB Emax 2 (E2) Air Circuit Breakers Device Type Electronic Undervoltage Release (UVR) / Undervoltage Trip Coil Rated Supply Voltage (Us) 220 - 250 V AC / 220 - 250 V DC Operating Voltage Range 0.85 to 1.1 x Us (e.g., ~187V to 275V). The breaker can be closed within this range. Trip Threshold Typically 35% to 70% of Us (e.g., ~77V to 175V). The breaker will trip when voltage falls below this threshold after a short time delay (to avoid nuisance trips on transient dips). Trip Delay Time Typically adjustable (e.g., 0.1s to 10s) or fixed (e.g., < 1s). This prevents tripping on momentary voltage dips. Reset Voltage Typically requires voltage to return to >85% Us before the release can be reset and the breaker re-closed. Power Consumption Typically a few VA/W when energized. Mounting / Compatibility Direct internal mounting onto the designated slot of an Emax 2 breaker. The T4-5 code specifies exact compatibility with specific frame sizes (e.g., E2.2, E2.4) and operating mechanisms. Connection Wired to an external control power supply via terminals on the breaker or the release itself. Standards Compliance IEC/EN 60947-2 Ambient Temperature -25°C to +70°C (Operation)