What is duty cycle and protection class?
Answers were Sorted based on User's Feedback
Answer / ravi
Duty Cycle:-
In telecommunications and electronics, the duty
cycle is the fraction of time that a system is in
an "active" state. In particular, it is used in the
following contexts:
Duty cycle is the proportion of time during which a
component, device, or system is operated.[1] Suppose a disk
drive operates for 1 second, and is shut off for 99
seconds, then is run for 1 second again, and so on. The
drive runs for one out of 100 seconds, or 1/100 of the
time, and its duty cycle is therefore 1/100, or 1 percent.
Protection Class is for what?????????Fire,A/C's.....
Is This Answer Correct ? | 5 Yes | 0 No |
Answer / er. vasim
Duty Cycle:- It is the classification based on time
duration for which a motor will be loaded
According to IsS 4722, following classes are assigned
S1-Continous
S2-Short time duty
S3- Intermitent periodic duty
S4- Intermitent periodic duty with starting
S5- Intermitent periodic duty with starting and electric
breaking
S6- Continous duty intermitent periodic loading
S7- Continous duty with starting and electric breaking
S8- continous duty with periodic speed change
IP Protection:
It stands for Ingress protection, According to IS 4691 IP
is classified as:
In IP their are two numerals, ie:IP56
1st numeral: protection against ingress of solid particles
or human body parts,etc
2nd numeral: protection against penetration of liquid
for 1st numeral
IP 1: protection against solid of 50 mm dia or more
2: protection agianst solid of 12.5 mm dia or more
3: 2.5 mm dia or more
4: 1-2.5mm dia
5 and 6: protection against dust particle
for 2nd numeral
1: protection against vertical fall of liquid
2:protection against fall of liquid at an angle of 15 degree
3: 60 degree
4: 180 degree (ie: heavy rain fall)
5 and 6:protection provided against liquid jet (very heavy
rush of liquid)
7 & 8:protection provided against total immersion in liquied
Is This Answer Correct ? | 2 Yes | 0 No |
Answer / g.e.t.
Duty Cycle - The duty cycle of a machine refers to how long
it can keep operating before it needs a rest. If you're
referring to motors, then there are 8 duty cycles S1 to S8
(IEC Standard) depepnding on the duration of operation,
nature of operation (continuous or intermittent) and
ambient temperature.
Protection Class - It is generally specified in Ingress
Protection or "IP" standards. It tells us about how the
inside of a motor is protected from water and dust. "IP55"
is the most commonly used industrial standard cuz it
provides protection against dust particles and water sprays
from all directions.
Is This Answer Correct ? | 1 Yes | 0 No |
Answer / ssreenu
He is asking about protection class like IP 65 etc.,
Is This Answer Correct ? | 0 Yes | 0 No |
how does directional relay work incase of ac ?
if there is fire alarm,what is ur activity?
If there is unit power factor in a power house and a capacitor bank used in a factory at resistive load . In this case, will there leading power factor in power house across that factory.
how do we calculate length of starting time and repeated starting of a direct online starter?
All the socket in a room become very hot, the Wall was also became very hot and the earth conductor also became live, what in your view might be the possible causes?
What is transmittance?
any calculation method for decide cable size for current?
why power generated only 11KV not more than???????? and why power up/down is multification of 11*?=??.??? foe Example 11/33,11/66,66/11KV etc,
what is an rmu?its circuit diagram.functions
14 Answers CP Bangladesh, Emrill, NDPL,
What are the Formula of computing Back up Time of 500kVA UPS with 4 Battery Banks, each bank composed of 43 pcs of Batteries 12V150Ah. How to compute the Back up Time of UPS? We have also 3X500kVA UPS running in Parallel same composition as I write above.
What is installed in PAC that is control the humidity
how to get electrical supervisour certificate in gujarat