TRG Series Medium and High Voltage Squirrel Cage Motor Electro-Hydraulic Starter Cabinet

Classification:

Soft Start Class

Product Message>

1. Overview

The TRG series high and medium voltage squirrel cage motor electro-hydraulic starter cabinet is a voltage reduction soft starting equipment used for large and medium-sized squirrel cage motors or synchronous motors with the rated voltage of 3-10kV. Its operating principle is as follows. A specially designed controllable liquid resistor is connected in series in the stator circuit of the motor. As the motor starts, the distance between the liquid resistor's mobile and fixed plates automatically changes, the resistance value decreases smoothly, and the starting current is maintained below 3.5 times the rated current. After starting, the liquid resistor will be automatically switched off, and the starting process has no impact on the power grid and no harmonic pollution.

2. Performance Features

◆ The starting current is 2.5~3.5 times the rated current;

◆ The starting time is adjustable from 20 to 60 seconds;

◆ Smooth start without impact, with a starting voltage drop of less than 8%, which has little impact on the power grid;

◆ Complete protection functions, with multiple protection functions such as overcurrent, over temperature, low liquid level, startup timeout protection;

◆ PLC control can be used to communicate with the upper computer through RS485 interface, meeting the requirements of DCS control system; the product can also achieve closed-loop control;

◆ It can be started continuously for 2-3 times.

3. Performance Parameter Table

Item	Functions and Indicators
Applicable motor voltage	3kV-10kV (special design for 11kV motors is required)
Applicable motor power	200kW~20000kW
Starting current	2.5-3.5 Times the rated current
Running mode	After the soft start is completed, the bypass contactor is engaged
Number of starts	2-3 Times/day
Rated short-circuit withstand capacity	≤4kA
Overload capacity	500% for 30s, 120% for long term
Starting features	Smooth start without impact on mechanical equipment
Soft starting time	20~60s adjustable
Protection rating	IP20
Overall structure	Cabinet type
Protection and Monitoring	Water tank liquid level monitoring, water tank temperature control
Operating environment	The altitude shall be no more than 1,000m; The upper limit is 40 ℃ (the average temperature within 24 hours shall not exceed 35 ℃), and the lower limit is 0 ℃; The relative humidity shall not exceed 90%; The installation site shall be free of conductive dust or corrosive gases.

4. Parameters for Selection

Model	Motor power (kW)	Overall dimensions WDH (mm)	Starting temperature rise ℃	Remarks	Star point cabinet
TRG-500/□□	500 below	150012002000	10	Single-side cabinet
TRG-1000/□□	500~1000	150013002200	10	Single-side cabinet
TRG-2000/□□	1000~2000	160015002650	14	Single-side cabinet
TRG-3000/□□	2000~3000	135013502600	14	Three-side cabinet	One side
TRG-5000/□□	3000~5000	145014502650	20	Three-side cabinet	One side
TRG-8000/□□	5000~8000	160016502650	20	Three-side cabinet	One side
TRG-10000/□□	8000~10000	180022502800	20	Three-side cabinet	One side
TRG-15000/□□	10000~15000	200025002800	20	Three-side cabinet	One side
TRG-20000/□□	15000~20000	200025002800	20	Three-side cabinet	One side

5. Primary Scheme Diagram

Note: The connecting cables between cabinets shall be provided by the users, and the operating ambient temperature of the liquid resistance cabinet shall be above 0 ℃.

6. Instructions for Ordering

◆ Users must provide the motor model, rated power, rated voltage, rated current, stator winding connection method, star point switched on or off and load characteristics of the motor when placing an order;

◆ In case of special requirements, the products can be designed separately and can match with our high-voltage switchgear and TGWB high-voltage capacitor compensation cabinet;

◆ If the star point short-circuit switch is a vacuum circuit breaker or equipped with differential protection, the one-side "star point cabinet" must be added;

◆ PLC control can be used to communicate with the upper computer through RS485 interface, meeting the requirements of DCS control system.

Key words:

TRG Series Medium and High Voltage Squirrel Cage Motor Electro-Hy

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