Dear All, Pls let me know about ELR.... CBCT is using for
singnal purpose... How it works.. any body can explain
pls.......
Answer Posted / gururaj dambal
ELR Earth Leakage Relays along with CBCT are used to detect
leakage current in the earhing. If the earthing is not
proper a small amount of current will appear (in the order
of mA). ELR will continuously monitor the leakage current
if it exceeds the set threshold an output electromechanical
relay (which is inside the ELR) will operate. The output
relay contact can be connected to circuite breakers /
contactor to isolate power supply or alarms.
CBCT Core Balance Current Transformers these will come in
different sizes. the core material will be either nickel or
alloy of nickel, copper wire will be wounded on the core
and properly insulated. The 3-phase line along with neutral
are passed in this core and secondary is connected to ELR.
Idealy the leakage current should be zero if any earth
leakage happen the leakage current will appear at CBCT
secondary it will be detected by ELR.
Is This Answer Correct ? | 36 Yes | 3 No |
Post New Answer View All Answers
WHAT IS DOL STARTER? HOW IT WORK? GIVE ITS CONTROL AND POWER DIAGRAM .
how works inductive &capacitive sensors?
how r charge carriers produced
how much leakage current is allowed in MC61A L&T make relay?
Is any AC drive(VFD) had a feature of DC injection braking? if available please mention the detail. i.e drive can supply braking torque when the motor in idle state.
1)what is the function of a frequency inverter? 2)If a few frequency inverter are connected onto a device network,what are the two setting that will ensure the frequency inverter work properly on the network. 3)whats is the name of the input sensor for weigher? 4)How to confirm that the load cellis faulty? 5)Describe briefly the steps to validate that the weigher is working properly? 6)Describe the procedure to validate the flowmeter accuracy? 7)Describe briefly the steps to validate that the tempreture sensor/transformer is working properly. 8)what is the adjustment that need to be done when you are calibrating the temperature transmitter ? 9)what are the safety measures to be taken before disconnecting motor for rewinding. 10)whats is the synchronous speed in rpm of typical 4pole 50hz motor? 11)whats is the formula for kw, ohm's law 12)if a 3phase motor is rated 3kw,415vac,what is it's rated ampere?
How to do maintenance of transformer feeder.
Explain what are inter-poles and why they are required in a dc machine.
what is the electrical?
What is power distribution criteria for converting single phase unbalanced residential load to 3 phase star connected balance system. Does total KW converted to 3 Phase. Means Divided by root 3.
how does a shunt reactor maintains the bus voltage???
how technical is calculated in 11kv line and lt line
If we impress a dc voltage of 230 V on an unloaded 230 V, 50 Hz transformer it wi A give high secondary voltage B burn out C give secondary voltage as per K D none of these
What is gross error?
1.25 kg of hydrogen are burnt with stiochiometric air, the mass of air in kg required is