Thread Content
Yuanchuang Electric supplies high-voltage cage motor starters, liquid resistance starting cabinets for cage motors, cage-type liquid resistance units, and cage-type water resistance units. YLQ series high-voltage cage motor starters ■ Application range: Suitable for the soft start and protection of large and medium-sized squirrel-cage motors or synchronous motors with a rated voltage of 3kV to 10kV, especially in industrial and mining enterprises where the grid capacity is limited. ■ Working principle: A special liquid resistor that serves to divide voltage and limit current is connected in series in the motor stator circuit. During startup, the resistance value of this liquid resistor changes continuously from high to low over a predetermined period of time, until it approaches zero; at that point, the liquid resistor is automatically disconnected, and the motor begins to operate. ■ Key performance features ● Low starting current, 1.5 to 3.5 times the motor’s rated current ； ● The starting process is smooth with no shocks, ensuring the reliable operation of the power grid; it effectively protects the motor and transmission machinery, thereby extending the service life of the equipment ； ● It can be started continuously 5-7 times, with better starting performance compared to starting using series reactors or thermistor-based starting methods ； ● It features comprehensive alarm notification functions and motor protection functions ； ● Controlled by PLC, ensuring high reliability ； ● Simple structure, easy to maintain, and requires low technical skills from maintenance personnel ； ● For different load conditions and application scenarios, proprietary \"rotary plate\" and \"flat plate\" structures have been developed respectively, ensuring their wide range of applicability ； ● To meet the special requirements of applications involving frequent starting, a frequently-starting high-voltage cage starter with independent patent rights has been developed, which effectively overcomes the drawback of conventional high-voltage cage starters being unable to start frequently. ■ Meets standards ● 3–35 kV AC metal-clad switchgear GB3906-1991; ● YLQ cage-type motor starters Q/XWZ5-2001. ■ Operating environmental conditions ● Ambient temperature: -40–50℃ ； ● Relative humidity: ≤90% ； ● Elevation: ≤2000m; (for areas above 2000m, special designs can be developed based on specific industrial and mining requirements) ； ● The ground slope should not exceed 5° ； ● The installation location is free from fire, explosion hazards, chemical corrosion, and severe vibrations ； Note: If there are special usage conditions, please state them and discuss them with the manufacturer at the time of ordering. ■ Main technical parameters ● Rated voltage (kV): 3, 6, 10 ； ● Maximum voltage (kV): 3.5, 6, 9, 11.5 ； ● One-minute power frequency withstanding voltage (kV): 25, 30/32, 38/42 (relative to ground) ； ● One-minute power frequency withstanding voltage (kV): 12, 15, 18 (phase-to-phase) ； ● Starting current (A): Iq: 1.5～3.5Ie ； ● Start time (S): 10～60～120 (adjustable on-site) ； ● Normal operating temperature for electro-hydraulic systems (°C): 5–70 ； ● Number of consecutive starts: 5–7 times.