GBC-40.5 type handcart type high voltage switch cabinet

GBC-40.5 trolley type high-voltage switchgear is the indoor protection type complete set of three-phase AC 50Hz single-phase busbar system, which is used for accepting and distributing 40.5kV network power.

Model Meaning

Structural characteristics

The switchgear cabinet is a handcart structure, using air insulation as the main, the insulation distance between each phase of the electrically charged body and the phase ground is not less than 300m, only the individual parts of individual program cabinets and the distance between the phases is insufficient to set the pole to the barriers. The main busbar of the switchgear cabinet adopts rectangular copper busbar with horizontal overhead device on the top of the cabinet, which can be observed before and after. The contact busbar generally adopts 50*5 diameter copper rows arranged in a triangular shape in the upper part of the cabinet, under special circumstances, (when the cable in and out of the line and contact) using cross-linked polyethylene plastic cable modified solid insulation contact busbar. Switchgear cabinet front, back cabinet and cabinet on both sides, are used to protect just door plate or sealing plate. The basic structure of the switchgear cabinet - cabinet and trolley are described as follows：

Cabinet
The skeleton of the cabinet is made of bent and welded angle steel plates, and is divided into a trolley room, an isolation contact room, a cable room, a relay room, a terminal room, and an instrumentation room.
Room, etc. Cabinet front center for the handcart room, open the two doors, the handcart can be in and out of the two doors are equipped with an observation window, the secondary plug is fixed in the right center door. Door is generally not set up a small room, only the use of the change cabinet (101 cabinet) set up a small room to install the control of the low-voltage air switch used. On the right side of the small door, designed for the installation of buttons and control switches and need to manually reset the relay, etc., the door has a terminal room, the device secondary wiring terminal group, the terminal is equipped with lighting for cabinet lighting above the lamps and lanterns, below the grounding bolt.
Cabinet before the upper part of the two open steel door, the door to install meters, indicators, etc., the door for the installation of relays in the small room, the cabinet small bus laying along the small room, small bus terminals with the left side of the small room, up to 15 laying small buses, of which there are two for the use of the closing. The lower part of the rear cabinet is the lower isolation static contact room, and the cable head is also installed under this room when the cable is used to enter and exit the line, and the contact bus of the switchgear with contact bus is also contacted from this room with the adjacent cabinet. The upper part of the rear cabinet is the isolation static contact chamber. The upper and lower static contact room can be installed according to the needs of the pillar insulator contact block or current transformer, through the wall casing; the upper part of up to six sets of current transformers can be installed, the lower part of up to three sets can be installed.
In order to ensure the safety of local maintenance, between the upper and lower primary static contacts, between the handcart room and the main bus on the top of the cabinet, are equipped with metal partitions, for the circuit breaker cabinet, in the handcart room on the top of the side of the metal partition, for the circuit breaker cabinet, in the handcart room on the top of the top of the side of the insulating partition, in order to prevent the circuit breaker jet caused by the inter-phase flashover. An insulating partition is provided between the lower isolating contact and the handcar compartment.
Switchgear cabinet is equipped with an identification device, in the middle door door frame on the left side of the angle steel pillar below the installation of two column pins, so that it is mounted on the trolley with the gear block to ensure that the same type of trolley can be interchanged, different types of trolleys can not be pushed in.

Handcart
The skeleton of the handcart is bent and welded from angle steel. According to the primary line program, there are seven kinds of handcarts, such as circuit breaker, three-phase or single-phase voltage transformer, arrester, isolation and transformer.
Various handcart operating surface are protected by metal sealing plate, the upper and lower protection plate is open to observe the situation inside the car observation window, the upper part of the operating plate, for the installation of operating handle, interlocking mechanism, and the cabinet of the secondary circuit between the connection of the P48KSS-type socket mounted on the lower right handcart, handcart bottom with grounding contacts.

Technical parameters and product size
The primary components assembled with GBC-40.5 high-voltage switches, including circuit breakers, actuating mechanisms, current transformers, voltage transformers, circuit breakers, surge arresters, power transformers, etc., can still meet the technical performance of their respective products under the conditions of this product's installation.