AIR CIRCUIT BREAKERS
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B Air Circuit Breakers ACB Introduction SFA and SDA series air circuit breaker is suitable for the circuit of AC 50Hz/60Hz with rated service voltage 400V, 690V and rated service current up to 4000A. It is mainly used to distribute electric energy and protect circuits and electric equipment against over-load, under-voltage, short-circuit and single-phase earthing fault. With intelligentized and selective protection functions, the breaker can improve the reliability of power supply, and avoid unnucessary power failure. The breaker is applicable for power stations, foctories, mines (for 690V)...

Intelligent Controller Functions Overload long time-delay protection Phase N Overload and Over-Current Characteristic 100% or 50% (Applicable to 3p+N or 4P) Short-circuit short-delay protection Short-circuit instantaneous protection Single phase earth fault protection technical data:

Control Circuit Intelligent Controller Vorking power Asistant Switch power supply Sb1 shurt button (prepared by user) Sb2 under-vottage button (prepared by user) SB3 swich-on button (prepared by user) X swich-on electric magnet M stored energy motor Q under-voltage release or under-voltage delay release ® signal lamp (prepared by user)

ACB ACMIDPAV Air Circuit Breakers Control Circuit The busbars should be suitably adjusted to ensure the connection points are positioned on the terminals before the bolts are inserted B the connections are held by the supporter which is fixed to the framework of the swich board, in this way the circuit breaker terminals do not have to support its weight C. (This support should be placed close to the terminals). B C B Correct clamping of busbars depends on the tightening torques used for the nuts and bolts,etc Over-tightening may have the same consequences as under-tightening. 1 2 3 4 1...

ACB Air Circuit Breakers Connected Position 1. Both main circuit and control circuit are connected. 2. Normal application conditions Test Position Disconnected Position 1. The main circuit is disconnected and the control circuit is connected. Neither the main circuit nor the control circuit is connected. Drawout Position Main body is out of the drawer seat. 2. Test application conditions. Making the secondary circuit power, the motor-driven mechanims can store energy automatically until hearing the click and energy stored ''indicating on the panel. Otherwise press the storage handle for 6...

ACB ACMIDPAV Air Circuit Breakers Mechanical Interlocking between 2 or 3 Air Circuit Breakers Vertical Interlock 50 52 40 60 160 900 50 52 60 40 160 900 153 163 Base 45 100 65 166 Base Of Circuit Breaker 2m max Horizontal Interlock R≥120 mm www.sigmaelektrik.com 40 3 vertical installed circuit breaker with lever interlock. If two breakers interlock, it only needs remove the above breaker.

Panel Front Cut Out (mm) Terminal Connection (mm) Connection Terminals

ACB Air Circuit Breakers Ordering Fixed Type ACB's Type No order Rated Current Break. Cap Release pack box of poles code In (A) Icu (kA) pcs pcs SFA-2000 3 SFA 1600 640-1600 80 Electronic 1 1 SFA-2000 3 SFA 2000 1200-2000 80 Electronic 1 1 SFA-3200 3 SFA 2500 1000-2500 80 Electronic 1 1 SFA-3200 3 SFA 3200 1280-3200 80 Electronic 1 1 SFA-4000 3 SFA 4000 1600-4000 80 Electronic 1 1 Release pack box pcs pcs Drawable Type ACB's Type No order Rated Current Break. Cap of poles code In (A) Icu (kA) SFA-2000 3 SDA 1600 640-1600 80 Electronic 1 1 SFA-2000 3 SDA 2000 1200-2000 80 Electronic 1 1...