Answer Posted / guest
A thyristor is a semiconductor device which acts as a
switch. However, when switched on it can only pass current
in one direction. It is in fact a switchable diode
sometimes known as a silicon controlled rectifier. To
switch alternating current two devices are connected in
inverse parallel.
Each device is turned on at the appropriate time by a
trigger pulse applied to the gate and the device will
remain on until the instantaneous load current through it
drops to zero.
The trigger pulses are generated by a driver - which times
the pulses to ensure the thyristor unit output is a
function of the input demand signal (e.g. from a
controller) in the selected Firing Mode.
Eurotherm thyristor units incorporate the thyristor
devices, together with the driver and the heatsink which
dissipates the heat generated by the thyristor devices.
Many units include internal high speed fuses to protect the
thyristors from high overload currents. The benefits of
thyristor units are numerous. They offer a reliable long
term alternative to electromechanical devices reducing the
necessity for ongoing maintenance.
Thyristor units are particularly cost effective for fast
systems, for complex loads involving transformers and/or
heaters whose resistance changes with temperature or time
| Is This Answer Correct ? | 11 Yes | 0 No |
Post New Answer View All Answers
WHAT IS MOBILE SUB-STATION? & REALLY BENEFIT IN INDIA
What is a difference between indoor transformer and outdoor transformer of same rating
What the difference between ac and dc inductor an capacitor
State the other types of Air Conditioners?
Why efficiency of generator is higher than motor at a particular load?
why we are using earth pit in sub stations.?
What is the best thing to protect the motor from running over full current. CT or O/L or pressure transducer at the given pressure rating
hai now i am working as a electrical design engineer in construction field can i get a job in oil and gass field or power plant project as a electrical design engineer?
what is POTT and PUTT explain?
how can decide the current rating of oltc
What will be the voltage impact on secondary side of two transformers with different vector groups when both voltages are compared.
Which motor connection is preferable star-delta or delta-star?
Sir, My doubt on cable sizing calculation, Load:74 KW calculated cable 1 run 50mm2. Now client asking us to reduce cable size by increasing runs. Sir, My question now when my mind strikes with 2 options 1) Divide load 74/2 = 36 and calculate cable for 36+36 making it 2 runs or 2) Simply i can divide 50mm2 /2 ie. 2 runs of 25mm2 Please suggest me sir
132/66kv sub-station procation ?
draw the full wave and half wave circuit of 3 phase system and inverter circuit used in ups
