I. Overview

GCS devices are suitable for power distribution systems in industries such as power plants, petroleum, chemical, metallurgical, textile, and high-rise buildings. In places with high automation levels such as large power plants and petrochemical systems that require computer interfaces, this low-voltage complete distribution device is used for power distribution, centralized control of electric motors, and reactive power compensation in power generation and supply systems with a three-phase AC frequency of 50 (60) Hz, rated operating voltage of 380V (400V), (660V), and rated current of 6300A and below.

II. Standard

IEC439-1 Low voltage switchgear and control equipment

GB7251 Low Voltage Switchgear Sets

ZBK360001 Low voltage withdrawable switchgear complete set

III. Functional unit

The module height of the drawer is 160mm. It is divided into 5 size series: 1/2 unit, 1 unit, 3/2 unit, 2 unit, 3 unit. Unit circuit rated current of 400A or below;

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

3. Each MCC cabinet can accommodate up to 11 drawers per unit or 22 drawers per 1/2 unit. More than one unit of drawers adopts a multifunctional back panel;

4. The drawer inlet and outlet wires use different numbers of same specification sheet structure plugs according to the current size;

The connection between the 5.1/2 unit drawer and the cable compartment adopts a backboard structure ZJ-2 type connector;

6. The transfer between the unit drawer and the cable compartment adopts ZJ-1 type transfer fittings with the same size rod or tube structure according to the current grading;

7. The drawer unit is equipped with a mechanical interlocking device.

IV. Device features

1. Increase the thermal capacity of the adapter and significantly reduce the additional temperature rise caused by the temperature rise of the adapter to the connectors, cable heads, and partitions;

2. The separation between functional units and compartments is clear and reliable, and the failure of one unit does not affect the operation of other units, so that the failure is limited to the minimum range;

3. The flat arrangement of busbars ensures good dynamic and thermal stability of the device, and can withstand the impact of 80/176kA short-circuit current;

4. The number of circuits in a single MCC cabinet can reach up to 22, fully considering the needs of automated electric door (machine) groups in industries such as large single machine capacity power generation and petrochemical systems;

5. The connection between the device and external cables is completed in the cable compartment, and the cables can enter and exit up and down. The current transformer is installed in the cable compartment for easy installation and maintenance;

6. In the same power distribution system, the short-circuit current can be limited by matching the current limiting reactor, stabilizing the bus voltage at a certain value, and partially reducing the requirements for the short-circuit strength of components;

7. The drawer unit has a sufficient number of secondary connectors (32 pairs for 1 unit and above, and 20 pairs for 1/2 unit) to meet the requirements for the number of contact points for computer interfaces and self-control circuits.