what is the difference between high impedance and low impedance differential protection?
604019
High impedance differential protection The basic principle of the high impedance protection is the same as the low impedance principal, it sums up all currents measured by the CT's surrounding the bus. The biggest difference is how the high impedance principle handles the problem of CT saturation on external faults.
299334
The IGBT has quite a low on-state voltage, which keeps conduction losses low. The IGBT has a fast switching speed. This minimises switching losses and allows for high switching frequencies which is good for motor harmonic and noise reduction.
498222
"Low-side" means the current travels from the load or device through the mosfet to ground (common). "High-side" means the current travels from the supply through the mosfet to the load and then to ground.
265841
There are two types of ground-fault protection required by the NEC: 1) the GFCI and 2) the GFPE. A GFCI is intended to protect persons against shock and electrocution. As implied by its name, the GFPE protects equipment from damaging line-to-ground faults and is not intended for the protection of people.
544041
Impedance [1]is measure of how well something resists electricity, so the lower means less power you will need to drive the headphone, in contrary the higher it is the more power the headphone will need to be driven that means impedance on between 16 and 32 ohms is perfect to be driven by smartphones or notebooks ...
935265
['High voltage gain.', 'Low current gain.', 'Low power gain.', 'Input and output phase relation is 0o.', 'It has low input impedance.', 'It has high output impedance.']
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Shielded cabling is more expensive than unshielded cabling and more difficult to install; it's stiffer, making it less flexible. The cable also has a larger diameter, taking up more space in conduit. UTP, on the other hand, actually provides faster transmissions in the absence of EMI.
1267322
Fuses represent a less expensive route for overcurrent protection. They also react faster than a circuit breaker, and they are believed to be more failsafe than breakers because they contain fewer moving parts. The metal either melts or it does not.
520590
Low-impedance REF protection has low inherent stability against CT saturation for external faults. High-impedance REF protection has high inherent stability against CT saturation for external faults. The operating current of the low-impedance REF protection is not realized by CT connection.
826213
CMOS (complementary metal oxide semiconductor) logic has a few desirable advantages: High input impedance. The input signal is driving electrodes with a layer of insulation (the metal oxide) between them and what they are controlling. This gives them a small amount of capacitance, but virtually infinite resistance.
732833
differential amplifier is a type of an operational amplifier , while general purpose of an op-amp is to amplify weak signal into strong signal and differential amplifier only just amplifies the difference b/w two input voltages(no difference-no amplification).
287152
The main difference between active power filters and passive power filters is that APFs mitigate harmonics by injecting active power with the same frequency but with reverse phase to cancel that harmonic, where passive power filters use combinations of resistors (R), inductors (L) and capacitors (C) and does not ...
1229008
The SERIES-NEGATIVE LIMITER limits the negative portion of the input pulse. The difference between a series-negative limiter and a series-positive limiter is that the diode is reversed in the negative limiter. ... In the PARALLEL-POSITIVE LIMITER, the positive portion of the input signal is limited when the diode conducts.
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Protective measures For example, in the case of automatic disconnection of supply, basic protection is provided by insulation and barriers and enclosures while fault protection is provided by protective earthing, protective bonding and automatic disconnection of supply.
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Typically a "rated" PSU uses better components and are more reliable. Generic PSU's often use cheaper components, can be a little less than truthful of about their actually capability (pretend they are more powerful than they really are) and sometimes do not included some safety features like over voltage protection.
1239109
If the voltage remains near or above 12v but the amp still goes into protect mode, disconnect all speaker wires from the speaker terminals of the amp and disconnect signal cables from the amp. ... If the amp still goes into protect, you have a bad speaker wire or the wire is shorted to chassis ground.
507213
When the impedance is a pure resistance, the apparent power is the same as the true power. But when reactance exists, the apparent power is greater than the true power. The vector difference between the apparent and true power is called reactive power.