Air Type Circuit Breakers
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AIR TYPE CIRCUIT BREAKERS

Air Type Circuit Breakers (ACB) Features of Control Circuits 1 Functional Features of Breaker 2 Air Type Circuit Breaker Selection Tables 5 Ambient Temperature Impact on Rated Operating 5 Current of Circuit Breaker Mounting Position Relative Humidity Ambient Temperature Pollution Degree Protection Degree IP40 (at assembly lever area)

AIR TYPE CIRCUIT BREAKERS setting button Drawer handle Closing spring Mechanism slot drawer inwards Opening Coil__Closing Coil Control Unit Air type circuit breakers are used for protection of generators with large powers, motor, capacitor groups and transformers, as well as general protection of factories, shopping malls, business centers. Drawout Type Circuit Breaker: Circuit breakers are automatically turned on during pull and push of the drawer via lever. When drawer-type switches fail, they can be quickly replaced with the spare one. Features of Control Circuit Protection Functions:...

AIR TYPE CIRCUIT BREAKERS Opening Time Features: Over current protection, long time delay, reverse time opening features are given in the table below. circuit breakers ■vertical position Brackets to assemble Federal air type circuit breakers should be latitudinal as Energy connection of Federal air type circuit breakers can be made at both bottom and top connection terminals. Short time delay over current protection, opening features: Reverse time (in short time delay current) protection feature of the breaker. T: Opening time of the breaker I: Fault current (Opening current) ts: Adjusted...

AIR TYPE CIRCUIT BREAKERS Rated operating voltage - Ue (a.c.) 50fiO Hz Rated insulation voltage - Ui (a.c.) Rated impulse withstand voltage - Uimp Rated Current Adjustment field Rated ultimate short circuit breaking capacity - leu 415V~(kA rms) Rated service short circuit breaking capacity - les 415V- (kA rms) Rated short time withstand capacity - lew 1s 415 V- (kA rms) Opening type Assembly method Fixed / Drawout Fixed / Drawout Fixed / Drawout Fixed / Drawout Long time delay current Long time delay interval Short time delay current Short time delay interval Instantaneous breaking current...

AIR TYPE CIRCUIT BREAKERS Order Codes:

AIR TYPE CIRCUIT BREAKERS Selection of Air Type Circuit Breaker for Transformer

AIR TYPE CIRCUIT BREAKERS Undervoltage Release: Undervoltage release is used in opening air type circuit breaker due to low voltage or phase disconnection. There are two types of low voltage releasers as instant opening and delayed opening types. Delayed type undervoltage release has 1 sec, 2 sec. and 5 sec. delayed models and accuracy Rated control power voltage Us (V) Release voltage Power consumption Order Code Closing Coil: After the motor mechanism completes energy storage, the closing coil promptly closes the breaker by releasing the spring in the mechanism. Rated control power...

AIR TYPE CIRCUIT BREAKERS Main circuit Over current releaser Auxiliary contacts Electronic control Control circuit feeding a : Circuit breaker X : Remote closing coil SB1 : Remote shunt trip button — ' : Device borders M : Energy storage (setting) motor Q : Undervoltage release (instant or delayed) SB2 : Emergency opening button ---: Connections to be made by user F : Remote shunt trip coil C~ : Connection sockets SB3 : Remote closing button □ : Terminals Note-1: If Q, F, X and M control voltages are different from each other, these might be connected to different powers. Energy storage...

AIR TYPE CIRCUIT BREAKERS Characteristic Curves: Current-Time Curve: Ground Fault Protection Current-Time Curve:

AIR TYPE CIRCUIT BREAKERS Panel Frame Busbar Connections

AIR TYPE CIRCUIT BREAKERS Assembling Gauge Panel Frame Busbar Connections Assembling Gauge

AIR TYPE CIRCUIT BREAKERS

AIR TYPE CIRCUIT BREAKERS Busbar Connections Assembling Gauge Panel Frame Winning Diagram Of Change Over Systems For Air Circuit Breakers Generator Phase Network Phase Air Type Circuit Breakers 1) Shunt Trip Coil Note: Feeding / Supplying voltage should be 220V other wise,