What does the number km1 on the small busbar mean
KM1 (below start) is a normally open set of contacts on contactor KM1, the coil of which is the circle on the right with a resistor and capacitor across it. Guide to Low Voltage Busbar Trunking Systems Verified to BS EN 61439-6 Guide to Low Voltage Busbar Trunking Systems Verified to BS EN 61439-6 November 2014 Guide to Low Voltage Busbar Trunking Systems Verified to BS EN 61439-6 Companies involved in the preparation of this Guide Acknowledgements. IEC 61439 is a standard developed by the International Electrotechnical Commission (IEC) that covers design verification for low-voltage electrical products and assemblies. A recent study found that there are roughly 30,000 arc flash incidents in the United States each year, many of which are powerful enough to cause significant injury to workers and costly damage to equipment2. The adoption of busbar power distribution systems on a global scale has accelerated in the. Close the start power feeds the coil of km1 (the contactor part), it has a sealing contact built on it (k1) in your box, it closes so power will keep the k1 coil energized.
Read More
