ENR-FNR series neutral resistance cabinet takes electrical
equipments such as the single phase transformer, resistor, current
transformer, measuring instruments, earthing protection output
terminals and all the entirety assembly in one closed mental
cabinet. Also this product is optional dis-connectors, surge
arresters in one complete set and that will be have high security
and reliability, arrange fix up decorate very clearly and easily to
be installed, debugger and operated. This cabinet uses single phase
dry type isolation transformer with stable performance and strong
impact. The material of resistance in transformer secondary side
takes the stainless steel.
ENR-FNR series generator neutral earthing resistor cabinet add the
special arrester to protect the generator neutral insulation. This
cabinet also can take the current and action reactor to monitor
unbalanced current in the neutral in usually and recorded action
times when there have the single earthing fault, it also can
provide an analog output for the protection and monitoring systems.
ENR-FNR series generator neutral earthing resistor cabinet
installed dry type single phase earthing transformer and
appropriate over voltage protectors, the single phase isolation
switch which in order to isolated power when repair or experimental
ENR-FNR series generator neutral earthing resistor cabinet is
specific to the power plant generator neutral point which use the
high resistance earthing complete set equipment. There may happened
that the Arc grounding overvoltage and insulation easily damaged as
the generator pressure in the weak level when the generator loop
occurs the single earthing, the current value is greater than a
It will result in generating core burns and sintering if the ground
current is too large.
Usually the generator neutral point use high resistance earthing to
limit the Arc earthing voltage, to reduce the core burns, to
produce the sensitivity of the relay protection at the same time.
Its action is to limit the voltage between phases in 2.6 times and
to limit the arc restrike, to prevent the damaging the main
equipments when over voltage in arc gap at the same time, to ensure
security when the generator is operating.
The features of products
1. This product is made of stainless steel nickel-chromium alloy
(Cr20Ni80) or non-metallic (carbon valves, zinc oxide valve)
material. With high conductivity, high temperature coefficient, can
resistant the temperature more than 1600℃, corrosion resistant,
good toughness without distortion, good stability.
2. The earthing transformer in cabinet is the dry type transformer
which has the high capacity and impact resistant.
3. Generator Neutral Grounding resistance cabinet is for indoor
use. The cabinet body is made of cold rolled steel (spraying) or
stainless steel .
4. There has space in the cabinet to add earthing recording device
and temperature and humidity control device.
The conditions for products
1. Generally for indoor. Please specify when ordering if you want
the outdoor type.
2. Altitude no more than 4000m. Please specify the product used in
the high altitude plateau when ordering,
3. Environment temperature: -20℃~+70℃, relative humidity less than
4. Surrounding the environment there is non flammable,
non-corrosive gases and conductive dust.
5. Used for 48~52 Hz(50 Hz system),58~62 Hz(60 Hz system)