QCRB series high-voltage thermal resistance starting control deviceDetailed product description：

The QCRB series high-voltage thermal resistance starting control device is suitable for large and medium-sized high-voltage squirrel cage AC asynchronous motors or high-voltage synchronous motors with asynchronous starting, used for voltage reduction starting. The motor started by this device has the soft starting characteristics of low and constant starting current, gradually increasing torque, no current shock or mechanical shock during the starting process, minimal impact on the power grid during starting, no electromagnetic interference, and is an ideal substitute for starting reactors and autotransformer voltage reducers. Compared with high-voltage variable frequency soft starters, it also has obvious advantages such as simple operation, maintenance free, and no harmonic pollution. The high-voltage thermal resistance starting control device is widely used for voltage level 3kV, 6kV, 10kV, power range 280kW~20000kW to larger capacity motors for voltage reduction soft starting.

Basic Principles
The high-voltage thermal variable resistor starting control device consists of three-phase balanced resistors with negative temperature characteristics. When a current is applied to the resistor, the temperature of the resistor gradually increases while the resistance value gradually decreases, thereby causing the motor terminal voltage to gradually increase and the starting torque to gradually increase, in order to achieve a smooth start of the motor and reduce the starting current. The device consists of a thermal variable resistor, a high-voltage soft start control cabinet, an isolation cabinet, a switching cabinet, and a star point control cabinet. It is supplied as a complete set and connected to the motor starting circuit. It has the function of starting the motor and completing the protection during the motor starting process.

Standard Specification for QCRB Series High Voltage Thermal Variable Resistance Starting Control Device

Model	Motor power (kw)	External reference dimensions H × W × D			Installation reference size (w × d)	Remarks
QCRB-280	≥280	two thousand	one thousand and three hundred	one thousand and one hundred	1200×1000	integration
QCRB-500	280~500	two thousand	one thousand and four hundred	one thousand and two hundred	1200×1000
QCRB-630	500~630	two thousand and two hundred	one thousand and four hundred	one thousand and two hundred	1200×1000
QCRB-800	630~800	two thousand and two hundred	one thousand and five hundred	one thousand and two hundred	1300×1100
QCRB-1000	800~1000	two thousand and four hundred	one thousand and five hundred	one thousand two hundred and seventy	1300×1100
QCRB-1250	1000~1250	two thousand and five hundred	one thousand and six hundred	one thousand and five hundred	1400×1300
QCRB-1600	1250~1600	two thousand and five hundred	one thousand and eight hundred	one thousand and six hundred	1600×1400
QCRB-2000	1600~2000	two thousand and seven hundred	one thousand and eight hundred	one thousand and eight hundred	1600×1600
QCRB-2500	2000~2500	two thousand and eight hundred	two thousand and one hundred	one thousand and eight hundred	1800×1600
QCRB-3200	2500~3200	two thousand	four thousand	one thousand and three hundred	/	Split type (including star point cabinet) with a total of four cabinets
QCRB-4000	3200~4000	two thousand	four thousand and four hundred	one thousand and four hundred	/
QCRB-5000	4000~5000	two thousand and two hundred	five thousand and six hundred	one thousand and four hundred	/
QCRB-6000	5000~6000	two thousand and four hundred	six thousand and two hundred	one thousand and six hundred	/
QCRB-8000	6000~8000	two thousand and five hundred	six thousand and five hundred	one thousand and eight hundred	/
QCRB-10000	8000~10000	two thousand and seven hundred	seven thousand	two thousand
QCRB-12000	10000~12000	/	/	/	/
QCRB-14000	12000~14000	/	/	/	/

Ordering Instructions
1. Model, power, voltage, current, power factor, and stator connection of the motor provided;
2. The high-voltage starting main circuit scheme, cabinet arrangement diagram, and distribution room layout plan of the selected motor;
3. Load situation and working requirements of the equipped motor