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the actual r.m.s current flowing in the relay expressed as a multiple of the setting current (pick up current) is known as plug setting multiplier.
mathematically ,
PSM= SECONDARY CURRENT/RELAY CURRENT SETTING
or
PSM= (primary current during fault)/(relay current setting *C.T ratio)
What else can I help you with?
Is a nail cutter a force multiplier?
No, a nail cutter is a tool used to trim nails and not a force multiplier. A force multiplier refers to a mechanism or tool that amplifies the force applied.
Is gear a force multiplier or a speed multiplier?
Both. A small driving gear and a large driven gear is a force multiplier. Whilst a large driving gear and a small driven gear is a speed multiplier
What item is used as both a distance multiplier and a speed multiplier?
The item used as both a distance multiplier and a speed multiplier in mathematics is the unit of a "mile." It is a unit of length that can be used to measure distances, and it is also commonly used in calculating speed where it is combined with time to measure the distance traveled over a specific time period.
What is the difference between a force multiplier and a speed multiplier?
A force multiplier increases the effort force and the mechanical advantage is larger than one (Which means it is easier to move a large load with a small effort). While the speed multiplier does not make the effort easier but makes the load move through a larger distance than the effort. The mechanical advantage of a speed multiplier is usually lower than 1.
Is a stairs a force multiplier or a distance multiplier?
Stairs can be considered a distance multiplier as they allow a person to cover a vertical distance more efficiently compared to walking up a ramp or slope. They reduce the effort needed to ascend or descend a height by breaking it into smaller, manageable steps.
What is The formula of time setting multiplier of relay?
The time setting multiplier of a relay is typically calculated using the formula: ( \text{Time} = \text{Setting} \times \text{Multiplier} ). Here, the "Setting" refers to the predetermined time setting on the relay, while the "Multiplier" is a factor that adjusts the setting based on specific operational conditions or relay characteristics. The exact values of the setting and multiplier will vary depending on the relay's design and application requirements.
What is psm tsm for idmt relay?
PSM stands for Plug setting multiplier and can be found on the front of the relay module in the form of a scale . PSM = Actual or fault current in the relay / ( CT Secondary current X Amp setting in the relay) From the above value of PSM find the time in seconds from the front of relay panel scale i.e., PSM Vrs Time in seconds Miltiply the time in seconds with the TSM to find the tripping time for the relay for the specific value of fault current TSM = Time setting multiplier Relay Operating time = TSM x time in seconds <- as observed from the scale .
What is meant by time multiplier setting?
the time setting multiplier is the fraction of the full angular travel for one complete rotation that the disc will perform before closing the trip contact.
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