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The product name:GCS low voltage switch

Update time:2017-12-29 1:34:14


Product Name: GCS low voltage switchDetailed description:GCS low-voltage draw-out switchgear (hereinafter referred to as the device) is the two joint design team in accordance with the requirements of industry authorities, the majority of electricity user
Product introduction

Product Name: GCS low voltage switch

Detailed description:

GCS low-voltage draw-out switchgear (hereinafter referred to as the device) is the two joint design team in accordance with the requirements of industry authorities, the majority of electricity users and design units designed and developed in line with national conditions, with high technical performance indicators to adapt to the electricity market Develop low-voltage withdrawable switchgear that needs and competes with existing introductory products. The device has been widely used by power users.

Device suitable for power plants, petroleum, chemical, metallurgy, textiles, high-rise buildings and other industries distribution system. In large-scale power plants, petrochemical systems and other high degree of automation requirements of the computer interface, as the three-phase AC frequency of 50 (60) Hz, the rated operating voltage of 380 (400) V, (660) V, rated current of 5000A And the following hair, power supply system distribution, motor centralized control, reactive power compensation using low-voltage power distribution equipment installed . The basic organization of the device is shown in Figure 1.

The device is designed to meet the following standards IEC439-1 "Low-voltage switchgear and control equipment"

GB7251 "Low-voltage switchgear"

Product use environment

1. Ambient air temperature is not higher than +40 ℃. Not less than -5 ℃. The average temperature within 24 hours shall not exceed +35 ℃. Exceeds the time, according to the actual situation derating operation.

2. Indoor use, the use of the location of the altitude of not more than 2000m.

3. The relative humidity of the surrounding air does not exceed 50% at a maximum temperature of +40 ° C and a larger phase seal temperature at a lower temperature, such as 90% at +20 ° C, should be taken into consideration due to possible temperature changes Occasionally produce the impact of condensation.

4. The installation of the tilt angle with the vertical plane does not exceed 5%. And the entire cabinet column is relatively flat (in line with GBJ232-82 standard).

5. The device should be installed in the absence of severe vibration and impact and not enough to make electrical components should not be corrosive places.

6. User special requirements. Can be resolved with the manufacturer.

Model and meaning

The main technical parameters

Main circuit rated voltage(V)

AC 380 (400), (660)

Auxiliary circuit rated voltage(V)

AC 220, 380 (400) DC 110,220

Rated frequency(Hz)

50(60)

Rated insulation voltage(V)

600(1000)

Rated current(A)

Horizontal bus

≤5000

Vertical bus(MCC)

1000

Bus rated short-time withstand current(kA/1s)

50、80

Bus rated peak withstand currentkA/1s

105、176

Power frequency test voltage(V/1min)

Main circuit

2500

Auxiliary circuit

1760

Bus

Three-phase four-wire system

AB、C PEN

Three-phase five-wire system

A、B、C PEN

Degree of protection

IP30、IP40

The main circuit

Device main circuit program a total of 36 groups of 87 specifications. Excludes scenarios and specifications derived from changes in control and protection of auxiliary circuits:

The main circuit program is solicited by the majority of design, manufacture, test and use of the views of the selected department, including the power generation, power supply and other power users needs, rated current of 5000A. Suitable for 2500kVA and below the selection of distribution transformers .

In addition, capacitor compensation cabinets are designed to meet the need of power factor improvement. Considering the need of comprehensive investment, the reactor cabinet is designed.

Auxiliary circuit

GCS Auxiliary Circuit Atlas is prepared in accordance with the requirements of the design requirements. A total of 120 auxiliary circuit solutions. Divided into two volumes. The book (AC operation part) is divided into 63 programs, the next book (DC operation part) a total of 57 programs.

DC operating part of the auxiliary circuit program. Mainly used in low-voltage power plant (power generation) plant of power plant: At the time of preparation, it has been taken into consideration that the power supply line for working (standby) power supply line, power line feeder for 200MW and below and 300MW and above capacity low- And the general control of the motor line.

The AC operation part of the auxiliary program is mainly used in factories and mines and tiers of low-voltage substation substation system. Engineering design can be used directly.

DC control power supply for the DC 220V or 110V, AC control power supply for the exchange of 380V or 220V, composed of drawer units cabinet. 220V control power from the control cabinet built-in transformer control power supply public control. Common control power ungrounded way to control the transformer, leaving 24V power supply for the use of weak signal used.

Meter installation site and the voltage of the introduction of methods and other installation requirements, see the auxiliary circuit diagram "preparation instructions."

Bus

In order to improve the thermal stability of the busbar and improve the temperature rise of the contact surface, all the TMY-T2 series hard copper bushes are installed. The connecting part of the copper busbar must be pressed and tinned. Can also choose full-length silver-plated copper bus.

Horizontal bus

The horizontal busbar is placed in the compartment of the rear of the cabinet. 3150A and above for the upper and lower double layout, 2500A and below for the single layer of cloth, each phase consists of 4 or 2 busbars, greatly improving the busbar short circuit strength.


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