Eaton IZM40 Operation And Maintenance Instructional Manual

Also see for IZM20: Manual Manual Instructions

Contents

3510/09 AWB1230-1605Effective October 2009Operation and maintenance ofIZM low voltage air circuit breakerMOELLER www.moeller.net/de/upportTable 7. Spring Release RatingsControlVoltagesOperational Voltagerange 80–110%inrush PowerConsumption aClosingTime (ms)24 Vdc 19–26 Vdc 250W 4048 Vdc 38–53 Vdc 250W 40110–125 Vdc 88–138 Vdc 450W 40220–250 Vdc 176–275 Vdc 450W 40110–127 Vdc 88–140 Vdc 450W 40208–240 Vdc 166–264 Vdc 450W 40a Required for less than 200 ms.Figure 46. Spring Release with Optional Latch SwitchUndervoltage release—The undervoltage release is an optionaldevice on both manually and electrically operated circuit breakers(Figure 47). It opens the circuit breaker when its supply voltage fallsto between 35–60% of rated voltage. If the release is not energizedto 85% of its supply voltage, the circuit breaker cannot be closedelectrically or manually (Table 8).Auxiliary switch—An auxiliary switch is an optional device providingremote electrical indication if the circuit breaker is open or closed(Figure 49). Up to three auxiliary switches can be mounted in thecircuit breaker. Each switch has two normally open (“a”) and twonormally closed (“b”) contacts for a total of 12 available contacts(Table 1).Table 8. Undervoltage ReleaseControlVoltagesOperationalVoltage range85–110%DropoutVolts30–60%inrush/ContinuousPower ConsumptionabOpeningTime(ms)24 Vdc a 20–26 Vdc 7–14 Vdc 250W/18W 7032 Vdc a 27–35 Vdc 10–19 Vdc 275W/15W 7048 Vdc a 41–53 Vdc 14–29 Vdc 275W/18W 70110–125 Vdc a 94–138 Vdc 33–75 Vdc 450W/10W 70220–250 Vdc a 187–275 Vdc 66–150 Vdc 450W/10W 70110–127 Vac b 94–140 Vac 33–76 Vac 450 VA/10 VA 70208–240 Vac b 177–264 Vac 62–144 Vac 400 VA/10 VA 70380–415 Vac b 323–457 Vac 114–249 Vac 480 VA/10 VA 70480 Vac b 408–528 Vac 144–288 Vac 400 VA/10 VA 70600 Vac b 510–660 Vac 180–360 Vac 400 VA/10 VA 70a Required for 200 ms.b Required for 400 ms.Table 9. Auxiliary Switch, Overcurrent Trip Switch, and CellSwitch Contact RatingsControl Voltages Contact rating inductive Load (amperes)250 Vac 10125 Vdc 0.5250 Vdc 0.25Figure 47. Undervoltage Release