GCS low-voltage withdrawable switchgear

Wankong Electric Co., Ltd. has been committed to product quality control and enterprise management, "manufacturing high-quality, service integrity" has always been our company's firm commitment to customers. The customers of the company's crystal sales are mainly power supply bureaus, switch factories, mechanical and electrical equipment companies, selling well in various provinces, municipalities and autonomous regions in China, and have been used by national key factories for many times, and exported to Europe, Africa, Southeast Asia and other countries, and have been praised by users in the process of use!

Overview of GCS low-voltage withdrawable switchgear:

GCS equipment is suitable for power distribution systems in power plants, petroleum, chemical, metallurgy, textile, high-rise buildings and other industries. In large-scale power plants, petrochemical systems and other places with a high degree of automation and requiring computer interface, as a three-phase AC frequency of 50 (60) Hz, rated working voltage of 380V (400V), (660V), rated current of 4000A and below power distribution, motor centralized control, reactive power compensation used low-voltage complete set of power distribution devices.

GCS low-voltage withdrawable switchgear performance indicators:

The design of the unit meets the following standards;

• IEC439-1 low-voltage switchgear and control equipment;

• GB 7251 low-voltage switchgear;

• ZBK 36001 Low voltage withdrawable switchgear;

GCS low-voltage withdrawable switchgear main structure:

• The main frame adopts 8MF type open section steel, and the two sides of the section steel have mounting holes with modulus of 20mm, 100mm and φ9.2mnl, which is flexible and convenient for internal installation;

• The main frame assembly form is designed in two types, fully assembled structure and part (side frame and beam) welded structure for users to choose;

• The functional rooms of the device are isolated from each other, and their compartments are divided into functional unit rooms, busbar rooms and cable rooms. The role of each chamber is relatively independent;

• The horizontal main bus bar adopts the flat arrangement behind the switchgearto enhance the ability of the bus bar to resist electric power, and the basic measures to make the main circuit of the device have high short-circuit strength capability;

• The design of the cable compartment makes it very convenient for the cable to go up and down;

• Size series of the device universal switchgear(see table below):

GCS low-voltage withdrawable switchgear functional unit:

• The drawer floor height modulus is 160mm, and it is divided into five size series: 1/2 cell, 1 unit, 3/2 cell, 2 unit and 3 cell. The rated current of the unit loop is 400A and below;

• The drawer changes only in the height dimension, and its width and depth dimensions remain unchanged. drawers of the same functional unit have good interchangeability;

• Each MCC switchgearcan be fitted with 11 one-unit drawers or 22 1/2-unit drawers. One of the drawers with more than one unit adopts a multi-function rear panel;

• Drawer inlet and outlet line adopts the same specification of the same specification of the plug-in according to the current size;

• The adapter between the 1/2 unit drawer and the cable room adopts the backplane structure ZJ-2 type adapter;

• The adapter between the unit drawer and the cable room adopts the same size rod or tube structure ZJ-1 type adapter according to the current;

• The drawer unit is equipped with a mechanical interlock device;

GCS low-voltage withdrawable switchgear main electrical components:

• The selection principle of the main electrical components is based on the introduction of technology, domestic mass production in series, and can meet the requirements of high performance of the device.

• AH series for power supply and feeder unit circuit breakers, M series produced by Schneider and F series produced by ABB with advanced performance. AH type circuit breaker has the characteristics of good performance, compact structure, light weight and strong series. The price is relatively low, the maintenance is convenient and the performance indicators can meet the requirements of this device.

• Drawer unit (motor control unit, partial feed unit) circuit breaker main selection CM1, TG, TM30 series molded case circuit breaker, Wankong Electric Co., Ltd. as a professional transformer manufacturer, box substation manufacturer, European change, box transformer manufacturer, high and low voltage complete set of distribution switchgearmanufacturers, will quote for you a professional transformer price and transformer quotation part to choose NZM-100 A series produced by MOELLER company. These switches have the characteristics of good performance, compact structure, short or no arc, and high technical and economic indicators, which can meet the requirements of this device.

• Disconnector and fuse type disconnector Q series. This series has high reliability, high breaking capacity and can realize mechanical interlocking.

• Fuse main selection NT series.

• AC contactor adopts B series, LC1-D series.

Features of GCS low-voltage withdrawable switchgear device:

• Improve the heat capacity of the adapter, and greatly reduce the additional temperature rise brought by the temperature rise of the adapter to the connector, cable head and partition plate.

• The separation between functional units and compartments is clear and reliable, and the failure of one unit does not affect the work of other units, so that the fault is limited to a small range.

• The flat arrangement of the busbar makes the device have good dynamic and thermal stability and can withstand the impact of 80/167kA short-circuit current.

• The number of loops of MCC switchgearsingle switchgearis as high as 22 times, fully considering the needs of large single-capacity power generation, petrochemical systems and other industries of automated motor groups.

• The connection of the device to the external cable is done in the cable compartment, and the cable can go up and down. The current transformer is installed in the cable compartment to make installation and maintenance convenient.

• The same power distribution system can limit the short-circuit current through the current limiting reactor matching, stabilize the bus voltage at a certain value, and partially reduce the short-circuit strength requirements for components.

• The drawer unit has a sufficient number of secondary plug-in connectors (32 pairs for 1 unit and above, 20 pairs for 1/2 unit), which can meet the requirements of the number of computer interface and automatic control loop docking points.

GCS low-voltage withdrawable switchgear auxiliary circuit:

The design of the auxiliary circuit diagram conforms to the relevant design technical regulations such as the "Technical Regulations on the Design of Electricity for Thermal Power Plant Plants", and is suitable for the low-voltage plant (institute) power system of power plants and substations and the low-voltage power distribution system in factories and mining enterprises and high-rise buildings.

The auxiliary circuit scheme is designed according to the main circuit scheme divided into power inlet, feeder (PC) and motor feeder (MCC) operation control function unit.

Installation and use of GCS low-voltage withdrawable switchgear:

After the product arrives at the place of receipt, the first thing to check is whether the packaging is intact, and if a problem is found, the relevant department of the contract should be notified in time to make business records, jointly analyze the reasons, and make a good visa and aftercare. For products that are not installed immediately, they should be placed in an appropriate place and properly stored in accordance with normal use conditions and the requirements of the temporary storage regulations for electrical equipment.

• The installation of the product should be carried out according to the installation diagram (see attached picture). The base channel steel and bolts in the bolt fixing method are provided by the user. When the main busbar is connected. If the surface is uneven due to transportation, storage and other reasons, it needs to be flattened and then connected and fastened.

• When the device is installed separately or in a row, its verticality and the deviation of the unevenness of the switchgearsurface and the gap between the switchgears shall comply with the provisions of the following table.

• Inspection and inspection before product installation and operation

(1). Check whether the switchgear paint or other covering materials (such as spray plastic) are damaged, and whether the switchgear is dry and clean.

(2). Whether the operating mechanism of electrical components is flexible, there should be no jamming or excessive operating force.

(3). Whether the on-off of the main and auxiliary contacts of the main electrical appliances is reliable and accurate.

(4). The drawer or pull-out mechanism should be flexible, lightweight, and without jamming and collision.

(5). The center line of the dynamic and static contacts of the drawer or withdrawal structure should be consistent, and the contact should be close. The insertion depth of the primary and secondary contacts should meet the requirements. Mechanical interlock or electrical interlock

The installation action is correct, and the latching or unlocking should be reliable.

(6). Drawers of the same size should be easily interchangeable without jamming and collision.

(7). The grounding contact between the drawer and the switchgear should be in close contact, when the drawer is pushed in, the grounding contact of the drawer is in contact first than the main contact, and the grounding contact is disconnected after the main contact when pulling out.

(8). The scale setting of the instrument, the change and polarity of the instrument transformer should be correct.

(9). The core specification of the fuse should meet the requirements of engineering design.

(10). The rating and setting of the protection should be correct and reliable.

(11). The insulation resistance value measured by 0100V megohmmeter shall not be less than 1MΩ.

(12). The connection of each bus bar should be good, and the installation of insulation supports, installation parts and other accessories should be firm and reliable.

Precautions for the use of GCS low-voltage withdrawable switchgear:

(1). The device is a low-voltage power distribution switchgear that is not installed against the wall, operated from the front, and maintained on both sides. The maintenance passage and door of the switchgear must be qualified professionals to enter or open for operation, inspection and maintenance.

(2). Air circuit breaker, molded case circuit breaker after multiple combinations, especially after short circuit division, will cause local burns of the contact and produce carbon substances, so that the contact resistance increases, should be maintained and repaired according to the circuit breaker instruction manual.

(3). After installation and maintenance, the isolation between the compartments and the functional units must be strictly checked to ensure the good functional separation of the device and prevent the expansion of the failure.

GCS low-voltage withdrawable switchgear product completeness:

The following documents and attachments are provided at the manufacturer's delivery:

• Device list

• Product certificate

• Instruction manual

• Factory test report

• About electrical drawings

• switchgeardoor keys, operating handles and contractual accessories

• Installation and instruction manual of the main components

GCS low-voltage withdrawable switchgear ordering instructions:

The order contract contains the following:

• The full model of the product includes the main circuit scheme number and the auxiliary circuit scheme number

• Main circuit system combination sequence diagram

• Electrical schematic diagram of auxiliary circuit

• List of components in the switchgear

• Voltage, current, time and other setting parameters in the circuit

• Other special requirements that do not conform to the normal use of the product