89
New generation IZM97, 99 low voltage air circuit breaker instruction manual
MN013010EN February 2020 www.eaton.com.cn
Section 7: Wiring diagrams
Electrical control diagram of IZM97/IZM 99 circuit breakers – Open/Close and motor
IZM series circuit breaker
91
92
1
2
4
Control
voltage
89
90
༅
༅
༆
༈
༃
༄
Legend:
MOT – Motor Operator for Charging Closing Spring
ST – Shunt Trip
SR – Spring Release
Description of Operation:
1. The motor is energized and runs, charges closing spring, and is cut off by switch.
2. When the spring is charged, the SC closes and the green indicating light will illuminate (if applicable).
3. Closing the CS-C contact energizes the Spring Release Coil and closes the circuit breaker. The Spring Release internal electronics
pulse the SR coil and then provides a high impedance circuit. This provides anti-pumping.
4. When the spring discharges its energy, the motor switch will re-energize the charging motor until the spring is charged again.
5. To detect the presence of voltage (Health Light), use Omron Red indicator LED Port # C22-L-R-120 for 120 Vac application. For 230 Vac
application, use C22-L-R-230. For 24 Vdc application, use C22-L- R-24. Remove the white (22 mm [0.89 in.]) diameter pilot light) Light
Diffuser from the assembly to give better indication of voltage present. Activate the push-button to trip the circuit breaker. See Eaton
for other voltages.
6. For secondary contacts, odd numbers should be treated as positive for any accessory. This will not apply to AC ratings.
7. ReferencePage 88 for internal circuit breaker wiring.
