11kv pole mounted transformer is a core device in medium and low voltage distribution networks, achieving power distribution from 11kV high voltage to 400V low voltage through step-down transformation. It has a compact structure, flexible installation, saves a lot of maintenance costs, is suitable for outdoor applications, and is an indispensable part of the power distribution system.
Introduction:
11kv pole mounted transformer is a type of step-down transformer installed on utility poles, mainly used to reduce the voltage of 11kV medium-voltage transmission lines to the standard voltage of low-voltage distribution networks. Provide power supply for residential, commercial and small industrial users.
It is a key device in the power distribution network, widely used in urban distribution networks, rural power grids, suburban and remote areas. It features flexible installation, small floor space and relatively low cost.
Main parameters:
Rated capacity:
The output power and capacity range of a transformer under normal operating conditions is generally from 5kva to 167kva. The specific capacity needs to be determined based on the load required by the user.
Rated voltage:
Input voltage: 11kv.
Output voltage: 400/230V, customizable as required.
Wiring group:
11kv pole mounted transformer's common type is Dyn11 (delta connection on the high-voltage side and star connection on the low-voltage side with a neutral wire, with the neutral point grounded and a phase difference of 11 o 'clock position), which is suitable for three-phase four-wire distribution systems.
Short-circuit impedance: It reflects the impedance characteristics of a transformer during a short circuit and is an important parameter for designing protection devices, typically ranging from 4% to 6%.
Cooling method:
Oil-immersed type is usually marked as "ONAN" (oil-immersed self-cooling, relying on the natural convection of the oil and the heat dissipation of the oil tank radiator). The dry type is "AN" (air self-cooling).
Packing:
11kv pole mounted transformer wooden box packing
Structure: The box body is made of solid wood or plywood and has undergone moisture-proof and insect-proof treatment. The interior of the transformer is fixed with foam/rubber pads.
Sealing property: Desiccants (such as silica gel bags) are placed inside the box and wrapped with waterproof plastic film on the outside.
Marking: The box body is marked with labels such as "Upward", "Moisture-proof", "Fragile", etc., and the weight, size and lifting point are indicated.
Transport:
1.Road transportation
Use flatbed trucks or low-floor trailers and place anti-slip rubber at the bottom of the transformer.
Transformers with a capacity not exceeding 200kVA can be transported directly as a whole. Transformers with larger capacity need to be transported separately (for example, by removing the oil pillow).
2.Railway/Sea Transport
It should conform to the container size (for example, 20/40-foot containers), and use twist locks or strapping bands when fixing.
