GCK low-voltage withdrawable switchgear

GCK low-voltage withdrawable switchgear, with functions equivalent to or better than GCL, is suitable for AC three-phase four-wire and five-wire systems rated at 380V. It provides incoming and outgoing power distribution, reactive-power compensation, energy metering, lighting and centralized motor control in power plants, substations, industrial and mining facilities, and high-rise buildings.

This product complies with GB7251.12-2013 "Low-voltage switchgear and controlgear assemblies", JB/T9661 "Low-voltage withdrawable switchgear" and IEC60349 "Low-voltage switchgear and controlgear assemblies".

Altitude: no more than 2500m.

Ambient temperature: -15°C to +40°C; daily average no higher than +35°C.

Relative humidity: not more than 50% at +40°C; Allow higher relative humidity at lower temperatures, with the possibility of occasional condensation; for example, 90 per cent at +20°C.

There are no fires, explosive hazards, serious pollution, chemical corrosive and vibrating sites.

Tilts with a vertical face not exceeding 5°.

For transport and storage processes of -25 °C-+55 °C, not exceeding +70 °C for a short period of time (not exceeding 24 h).

If the above conditions of use cannot be met, the user shall submit a settlement to the company at the time of ordering.

Rating insulation voltage: 660 V, 1000 V.

Standard working voltage: 380V, 660V.

Auxiliary circuit rated voltage: AC220V, 380V, DC110V, 220V.

Rating frequency: 50 Hz~ (60) Hz.

Rated current: horizontal busbars ≤6300A; vertical busbars 630A, 800A, 1200A.

Rated short-time withstand current: 50, 80kA/1s; neutral busbar 30kA/1s.

Rated peak current: 105kA/0.1s, 50k~0.1s.

Functional-unit (drawer) breaking capacity: 50kA (RMS).

Shell protection level: IP30, IP40.

Busbar arrangements: three-phase four-wire or three-phase five-wire.

Operating modes: local, remote and automatic.

The basic framework of SWGCK is a combination structure in which all the building blocks of the shelf are coated with zinc, sprayed, attached to each other through bolts and hardened into the basic shelf, with parts such as doors, panels, partitions, drawers, racks and parent-line and electrical components, as required, assembled into a complete control centre cabinet with the following characteristics.

1 counter

The shelf is assembled in type C material, and parts of the shelf and specialized parts are supplied by the company to ensure the accuracy and quality of the cabinet.

1.1 Component dimensions, hole sizes and equipment spacing are modular (module E=20mm, also used below).

1.2 Internal structural parts are galvanized.

1.3 The top cover is removable. Lifting eyes at the four top corners are accessible after removing it, for lifting and transport.

1.4 External surfaces are phosphated and then electrostatically coated with epoxy powder.

1.5 The frame is divided into three isolated compartments for busbars, functional units and cables, helping contain faults and facilitating maintenance while other parts remain energized.

2 Functional units (drawer section)

2.1 Functional units: feeder, motor and common power-supply units.

2.2 Drawer height is based on a 200mm module, with five sizes: 1/2 unit, 1 unit, 1.5 units, 2 units and 3 units. Unit-circuit rated current is below 630A.

2.3 Each MCC cabinet accommodates up to 9 one-unit drawers or 18 half-unit (1/2) drawers.

2.4 The main-switch operating mechanism mechanically interlocks the compartment door and drawer. The drawer cannot be withdrawn when the main switch is closed.

2.5 A padlock can secure the main-switch operating mechanism in the closed or open position to allow safe equipment maintenance.

2.6 The rear of the functional unit has main-circuit incoming/outgoing plugs, auxiliary-circuit secondary plugs and an earthing plug.

2.7 The earthing plug maintains continuity of the protective circuit in the disconnected, test and connected drawer positions.

2.8 Metal partitions separate the functional-unit compartments.

2.9 Compartment shutters open and close automatically as the drawer is inserted or withdrawn, preventing contact with the vertical busbars inside the compartment.

2.10 The drawer uses a rotary racking mechanism with three positions, for simple and reliable operation.

2.11 Drawer operating mechanism

The CJ-5 drawer propulsion body (hereinafter referred to as the institution) uses a spiral track motion along the locator to achieve the propulsion and extraction of functional units, allowing electrical locks to be performed when three position displays and mechanical locks, together with micro-engineer test positions, are achieved during the propulsion and extraction of functional units, avoiding human or equipment accidents and meeting relevant national and industry standards. This product is small, flexible and reliable.