Liquid resistor starter for low voltage squirrel t

Liquid resistor starter for low voltage squirrel type motor I. Overview YQD seriesLiquid resistor starter for low voltage squirrel type motor applicable cage exchange asynchronous motor or asynchronous starting low-pressure synchronous motor step-down start and resistance. Use this device has the motor starting current constant, torque and gradually increase the soft starter, starting performance than starting reactor. II. Working principle Low voltage resistance starting device with liquid by negative temperature characteristics of resistors. When the resistance of the current, the resistance body temperature raises gradually decreases resistance, thus gradually raising gradually, the voltage motor starting torque increases gradually, in order to realize the smooth and soft starter motor starting current. Low starting resistance through switchgear (liquid) access control loop, the motor starter motor and start off with switch power supply circuit, and the function independently motor starting process of protection function. III. Performance characteristics 3.1 Constant current, soft starter: starting current for motor rated current of 2.5-3.5 times, reduce the motor starter fever, effectively prolong service life; motor, 3.2 Ensure a start-up success, not by voltage fluctuation and load changes, 3.3 Start smoothly, no impact on mechanical equipment, 3.4 For grid, little starting grid pressure drop in 5%, 3.5 Simple structures, convenient operation and maintenance. IV. Notice 4.1 Ordering product model, specifications, quantity, 4.2 The motor model, power, voltage, current, the device name and duty requirement, 4.3 The motor starter of main loop scheme, 4.4 Special requirements with manufacturers negotiate separately.