3KC3 and 3KC6 transfer switching equipment3KC3 and 3KC6 transfer switching equipment
Applications
The application areas for the 3KC3 and 3KC6 transfer switching equipment are described in this chapter. The innovative solutions offered by the transfer switching equipment for complex source requirements are described here.
An appropriate, separate transfer control device that is also suitable for transfers between a network and a generator must be used with the 3KC3 transfer switching equipment for the purpose of source monitoring and control. The 3KC6 transfer switching equipment is suitable for transfers between two networks but is not designed for a generator, as it cannot control and start the generator. Nevertheless, this chapter also discusses the network/generator applications, as this can be implemented using the 3KC3 transfer switching equipment combined with a suitable transfer control device.
The symbols shown in the circuit diagrams have the following meaning:
Symbol |
Explanation |
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Transformer (1) |
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Generator |
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Transfer switching equipment with the switches P1 and P2 |
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Load |
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CL = critical load |
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NCL = non-critical load |
The following tables show the behavior of the transfer switching equipment. The availability of the sources (transformers or generators) is described by the following numbers:
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1 = source available
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0 = source not available
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x = source availability not defined as it is insignificant.
The switching states of the transfer switching equipment are described as follows:
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P1 = P1 switch closed
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P2 = P2 switch closed
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P3 = P3 switch closed, etc.
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x = insignificant (transfer switching equipment can be in any one of the three switching states I, 0 or II).
The power supply of the loads is described as follows:
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OFF = Load is not supplied
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ON = Load is supplied
Advantages of the 3KC6 series:
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Plug and play solutions
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Compactness of the transfer switching equipment
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Reduced number of products through all-In-one solutions
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Installed mechanical and electrical interlockings
The sequence tables below apply for the transfer switching equipment with an electronic module (3KC6) and the 3KC3 transfer switching equipment with an appropriate, separate transfer control device.