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If the protection device is bimetalic type then it takes a few seconds to get heated up before tripping off. In case of other advanced type of protection devices, there could be a preset timer to allow a certain amount of high starting current. In both the cases, the avoidence of tripping during starting is by design, since it is known that the motor takes a high starting current.
What else can I help you with?
What is mean by instantaneous release of current in mpcb?
Instantaneous release of current in an MPCB (Motor Protection Circuit Breaker) refers to the rapid tripping of the circuit breaker when a fault current exceeds a predetermined threshold. This feature provides quick protection to the motor by disconnecting it from the power source to prevent damage.
How is the full load current different to the starting current- is the full load current higher or lower than the starting current?
While starting a motor from standstill to its rated speed, the motor has to overcome the inertia and generate enough torque to over come it. In the process the motor takes higher current during the starting. Once started and set in motion the current reduces ti its normal value. Full load current is lower than the starting current normally.
How do you calculate voltage drop for starting motor current and how to get the starting pf?
How do you calculate voltage drop for starting motor current
How many percent will be the starting current for motor?
Motor starting current is typically 5-7 times the rated current of the motor. (For three phase induction motors)
FCMA starter principle and working during starting induction motor?
The FCMA (Field Control Motor Arrangement) starter principle involves controlling the field current to manage the starting torque and speed of an induction motor. During startup, the motor is initially supplied with reduced voltage to limit the inrush current, and the field current is adjusted to ensure smooth acceleration. As the motor approaches its rated speed, the field current is gradually increased to optimize performance. This method enhances efficiency and prolongs the motor's lifespan by preventing mechanical and electrical stress during startup.
What is the ac motor starting current?
what is the starting current of 2ton window ac voltas
Why is the starting current high in DC motor?
The starting current is high because when the motor is not rotating no back-emf is generated, leaving the starting current to be determined by the armature resistance, which should be low.
Which motor has a higher starting torque?
A series-wound commutator motor has the best starting torque because the torque is proportional to the square of the current, and the starting current is set by a current-limiting resistor which is switched out as the motor builds up speed.
Starting current of 160 kw motor with star delta starting?
Assuming the Motor is IE1 Efficiency and 4 Poles, the in rush current will be 1183 A
Why you use DOL starter in starting of motor?
because of starting current of induction motor is very high and it damages the insulation of motor
What is the Full load motor current of a 75KW motor?
Full load starting current is typically in the region of 5or 6 times the full load motor current;.
What is the most suitable method of starting a 10hp motor with reduced inrush starting current?
The most suitable method for starting a 10hp motor with reduced inrush starting current is using a soft starter. A soft starter gradually increases the voltage supplied to the motor, allowing it to ramp up to full speed smoothly, thereby minimizing the initial surge of current. This method helps reduce mechanical stress on the motor and connected equipment, improving reliability and longevity. Additionally, it can enhance energy efficiency during startup.
