Tcs Series Voltage Reduce and Compensation Solid Soft Starter

I OverviewTCS series of voltage-reduced compensation solid soft starting devices are applicable to   large or medium-sized high voltage squirrel-cage AC asynchronous motor or asynchronously started high-voltage synchronous electric motor for the purpose of motor soft starting.The device can achieve small and invariable current and large torque with gradual increase characteristic of the soft starting when starting the electric machine, and the influence on starting grid is very small, and no electromagnetic interference.Its starting performance is superior to the frequency converter for simple structure, exempting from maintenance and no harmonics and it is also an ideal substitute for all kinds of voltage-reduced starting products.
The device uses two patented technologies, technical level of domestic leading an international initiative.
Patent:ZL 2006 2 0098882.0;ZL 2006 2 0095622.8.
The device can be applied to the soft starting of the 6,10kv large capacity motor below 50000kw. II Principle and equipment1.The overall structure and working principle
The main circuit as shown in Figure 2-1:

                                                            Figure 2-1 TCS main circuit
The device include voltage-controlled device and reactive power control device, also it   needs start cabinet, running cabinet and other relative switch cabinet.The device through the start cabinet is connected with the 10kV bus.When start high-voltage power through the device to provide starting power for the motor.Then close the running cabinet to provide running power for the motor.
Because large motor in the starting process will consume a large amount of reactive power, causing power grid voltage fluctuations.In order to reduce motor starting influence of the grid voltage, the device provides a reactive power generator which is connected with the motor in parallel, providing for Motor Starting some of the needs of reactive power.
In order to further reduce the bus current I1, the device connect the reactive power control devices and motor through a voltage transformer to bus, by reducing the terminal voltage to further reduce the current.The output current of the transformer is the difference between motor current ID and reactive power current IC, the ratio between first and second voltage of the transformer is 1:K,k<1)..

Therefore, by adjusting the voltage ratio of the transformer and reactive power current the starting current which flows from bus bar can be limited within a certain range.
2.Device components and their function
This device consists of voltage controlled device and reactive power control device, it also needs start cabinet, running cabinet and other supporting switch cabinets.Voltage controlled device includes the voltage transformer and voltage control cabinet;Reactive power control device includes reactive power generator and reactive power control cabinet.


The role of voltage transformer is to reduce the motor terminal voltage to an appropriate value of starting.The voltage transformer input from the bus voltage, taking into account the power grid and load fluctuations, the voltage transformer is set to three switch positions.
There are two functions of the voltage control cabinet:First, to regulate the balance of secondary voltage and weaken the neutral point of the voltage drift;Second, to reduce the switch surge.
The role of reactive power generator is to provide reactive power to motor, reduce the reactive current of absorption from the grid, thereby to reduce the impact on the power grid.As figure2-2 shown:


Figure 2-2   Vector of reactive power compensation
As can be seen from the figure, in the motor-side to provide reactive power, the current I absorbed from the system decreased significantly.
Reactive power control cabinet and reactive power generator form the reactive power control system, timely to control reactive power generator to provide a reasonable reactive power. III Model and specification1.The composition and significance of models

Figure 3-1 Model Description
Such as:TCS3-20000/10,means 3 Series voltage-reduced compensation solid soft starting devices, applicable to 10kV motor, for motor power up to 20000kW.
2.Model and specification
TCS series voltage-reduced compensation solid soft starting devices is divided into 2, 3, 6 series.TCS2 series applies to 8000kW motor power below, the TCS3 Series applies to range from 8000kW to 40000kW, TCS6 Series range from 10000kW to 50000kW, and the same power of the 6 Series control accuracy is higher than the 3 Series.
Table 3-1 Model and specification sheet Note:1, Models 10 (6) means voltage level is 10kV (or 6kV).
2, Reactive control cabinet model is related with the group number of reactive power generator. IV Features1.Starting loop current is generally less than 1.5 times the motor rated current (2 series is generally less than 2 times), the minimum can reach rated current;
2.The Starting voltage drop of the grid is generally between 5% -12%;
3.Low request for power distribution capacity.Thus it could reduce the installation capacity of transformer and investment of equipments;
4.The starting torque is relatively high.Thus it can meet the demands of different loads;
5.It can be used continuously, and has high repetitive precision;
6.No harmonics, very low influence to power energy quality, low voltage drop and no additional active power loss;
7.All sealed, no environmental restriction, safe and reliable, long life, basically exempt from maintenance.
 V main performance parametersThe main performance parameters of TCS 2, 3, 6 series soft-start device is shown as following table:
Table 5-1 main performance parameters of TCS series of soft-start device  VI Dimensions and weight1.Part of the TCS 2, 3, 6 series device dimensions can refer to table 6-1, device weight  reference table 6-2.
2.Part of the outside dimensions refer to Figure 6-1 ~ 6-6.The figure also shows the start cabinet and running cabinet.Sometimes line cabinets and PT cabinets are needed (Figure is not drawn)
3.As Figure 6-1 ~ 6-6 shown, the voltage control cabinet and reactive power control cabinet are placed sides of running cabinet and start cabinet, but they can also be placed in a separate room with transformer and reactive power generator.
4.For small power motor.Sometimes reactive power control cabinet and reactive power generators are integrated into a reactive power control device;For large-power motor, the reactive generators may be composed of two or three sets
5.Overall size and weight of the above selection only for reference, the exact data will be supplied as final drawing.
Table 6-1 TCS device size table (W*D*H mm)
Table 6-2  TCS device weight table(kg) VII service conditions1.Ambient Temperature::Not exceed 50°C(the 24h average Temperature not exceed 45°C),and not below -10°C.
2.Relative Humidity:≤90%;
3.Altitude:≤1500m;
4.Placed in room, free from excess vibration and impact, degree of vertical inclination not exceed 5°
5.Free from metallic particles, conductive dust and corrosive gas;
6.Without fire and explode danger.
Note:Please notify when ordering if the ambient temperature is below -10°C for a long time or the altitude exceeds 1000m. VIII manufacturer standardsEquipment manufacturers comply with the following standards:
1.GB311.1-2-83 High-voltage power transmissions and transformation equipment, insulation coordination
2.GB311.2~311.6 High-voltage experimental technique
3.JB 7112-2000 A collected High Voltage Shunt Capacitor
4.GB/T6451-1999 Three-phase oil-immersed power transformers technical parameters and requirements
5.GB1094.1-1996 Power Transformer Part I:General Provisions
6.GB1094.2-1996 the second part of the temperature rise of power transformers
7.GB1094.3-2003 Power transformer Part III:Insulation level and insulation test
8.GB1094.5-2003 Power Transformer Part V:Of the ability to withstand short-circuit
9.GB/T10237-1988 Power transformer insulation levels and insulation testing of outer insulation of the air gap
10.GB/T 15164-1994 Oil-immersed power transformers Load Guide
11.GB5582 High-voltage electrical equipment, insulation contamination level
12.GB50150-91 Installation of electrical installations in the transfer of electrical equipment testing standard
13.GB5273 High-voltage electrical appliances, transformers and casing terminals
14.GB/T 11022-1999 High-voltage switchgear and control equipment standards for common technical requirements
15.GB3309-89 High-voltage switchgear room temperature mechanical testing
16.GB2682-1981 Electrical device sets the color of the lights and buttons
17.GB4208-1993 Enclosure protection class(IP code) IX ordering informationThe following information need to be provided when order.
1.Motor type, motor rated power, rated voltage, rated current, locked-rotor current times, start torque,  inertia of motor and load, short-circuit capacity, load resistance torque curve
2.Primary circuit diagram, cabinet arrangement diagram, electricity Distribution Room Floor diagram.
Special requirements please consult separately with the manufacturer.