Pauwels International NV

Package Substations

Pauwels International - MicroSubs

UK Standard Range

kVA	Phases	Voltage ratio
50	1	11000/250
100	1	11000/250
50	3	11000/433
100	3	11000/433
200	3	11000/433

Features

Low profile
Flush cover door lock
Tamper proof
E Coat paint system
Simple foundation system

The Pauwels MicroSub was first developed to meet the technical requirements for rural and small scale suburban underground cable power distribution in France. In many scenic rural areas the preference is not to have overhead lines disturbing the enviroment wherever possible. This is particularly true in small villages and nearby rural schools. The solution is to use underground cables and MicroSubs. The MicroSub is fitted with HV in-tank full range or current limiting fuses as standard and a single or 3 phase outgoing fuse distribution unit. Alternative LV systems include LV circuit breakers or fuse switch units. HV termination can be by plug in bushings or by conventional dry type cable box as shown here. The unit shown above was developed with respect to the defined needs of a major UK utility and their operational systems. Other UK utilities are also now using this type of unit.

The economic case is for this type of substation made very clearly where "monkey up a stick" H pole mounted transformer and pole mounted fuse systems have been used with underground cables to and from them. The MicroSub in the same location is low profile and secure and avoids the impact of the H pole structure on the environment.

3 phase pole mount and MicroSub

The MicroSub, as the name suggests is little bigger than a 3 phase pole mount transformer at approximately 1.1m cube in dimensions and fully metal clad. Double front access doors enable access to the HV connection box and the LV equipment. In the unlikely event of problems with the transformer the ease of installation and handling means that a replacement unit can be quickly fitted to minimise loss of supply for customers and the faulty unit taken away for service off site.

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