GCS low voltage draw out type switch device
- Name：GCS low voltage draw out type switch device
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Summary
GCS type low voltage draw out type switch cabinet, suitable for power plant, petroleum, chemical industry, metallurgy, textile, high-rise building and other industries of power distribution system. In large power plant, petrochemical, high degree of automation, requirements and computer interface, as a three-phase AC frequency is 50 (60) Hz, rated voltage 400V, 660V, rated current 5000A and below the hair, power supply system in power distribution, motor concentrated control, without the use of reactive power compensation of low-voltage power distribution equipment.
The device is designed to meet the following criteria:
IEC439-1 "low voltage switchgear and control equipment"
GB7251 "low voltage switchgear equipment"
Model and meaning
Conditions of use
The ambient temperature is not higher than +40℃ and not lower than -5℃, then the average temperature within 24 hours should not be higher than +35℃. As time goes by, reduce the capacity according to the actual situation;
The altitude of the indoor use place does not exceed 2000m;
The relative humidity of the environment at 9:28 temperature does not exceed 50%, and a higher relative humidity is allowed at low temperatures, such as 90% at 20°C. The influence of temperature changes should be considered, and the temperature occasionally condenses;
The vertical surface on which the equipment is installed has an inclination of no more than 5 degrees, and the entire cabinet column is relatively flat (in accordance with GBJ 232-82);
The equipment should be installed in a place where there is no severe vibration and impact, and it is not enough to prevent the electrical components from being corroded;
*Users have special requirements, which can be resolved through consultation with the manufacturer.
Performance part performance
The main circuit scheme of the GCS cabinet is composed of 32 groups of 118 specifications, including the control and protection of auxiliary circuits, as well as the deduced scheme and specification changes. Including power generation, power supply and other users who need electricity, the choice of distribution transformers of 5000 a and below when the rated working current is 2500 KVA.
In addition, in order to improve the application of the power factor of the power supply and the design of the capacitor compensation cabinet, the investment requirements and the design of the reactor cabinet are comprehensively considered.
Auxiliary circuit scheme.
The GCS auxiliary circuit is composed of the auxiliary circuit atlas 120, divided into two volumes. "I AC operation is divided into 63 parts" plan, "IDC operation" has 2 57 program parts.
The auxiliary circuit scheme of the DC operation part is mainly used in low-voltage power plant substations (systems). It is suitable for the general control mode of the unit capacity, working (standby) power line, feeder and feeder motor of 200 MW and below and above 300 MW and low-voltage unit systems.
The main part of the auxiliary AC operation plan of the low-voltage system of the factory and high-rise building substation. There are 6 combination schemes suitable for dual power supply operation control. And with electric interlocking standby automatic switch, self-control circuit operation, the project design can be used directly.
The DC power supply is DC 220V or 110 V, and the AC power control is AC 380V or 220 V. The drawer unit is composed of a complete set of cabinets. The 220V control power supply is transformed from a cabinet-specific general control power transformer. The power supply control and grounding mode control transformers jointly control the power supply. The remaining 24 V power supply is used for weak signal lights.
For the installation position of the electric meter, the introduction method of the voltage signal and other installation requirements, please refer to the "Preparation Instructions for Auxiliary Circuit Diagram".
The main bus.
In order to improve the dynamic thermal stability of the busbar and the temperature rise of the contact surface, the equipment uses T m Y-T 2 series hard copper, the copper busbar adopts full-length tin, or the copper busbar with silver-plated length.
Both horizontal A. bus and vertical bus are installed in the cabinet bus isolation room.
B. Use hard copper wire for neutral grounding bus. Through the neutral point grounding wire (P E N) or the neutral point grounding wire (P + E + N).
*Electrical component selection
The GCS cabinet mainly adopts advanced technology with high performance stability index value, and the imported technology of electrical components can already be mass produced in China.
A. Main switch
Power cords and feeder switches of 630 A and above are mainly DW45 series. DW48 A series, E series, 3 W E or M E series can also be used, depending on the needs, and imported M series or F series can also be used.
The following control switches are TG series, CM1 series, NM series, CDM series, TG30 series plastic case switches for b.630A feeders or motors.
