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Crowbar resistor

Crowbar resistor

Product features:

1. Suitable for harsh operating environments of wind power converters;

2. Made of stainless steel resistance material, it has strong heat dissipation performance and can withstand continuous impacts;

3. Made of mica interlayer, with small volume and strong short-term impact energy;

4. The shell is made of stainless steel and corrosion-resistant materials, with excellent appearance;

Product consultation hotline:18617185077
Product details
Product application:

Crowbar resistors are mainly used in low voltage ride through technology for wind power inverters. It is used on the rotor side of wind turbines and is used to bypass the rotor side converter. When low voltage disturbances occur in the power grid, prevent excessive DC bus voltage and rotor current. Mainly working in a faulty state. The Crowbar resistor can instantly dissipate 80% of the enormous energy. Generally, CROWBAR is designed with a small resistor to protect the frequency converter components from amplifying current during grid faults, and the low voltage ride through function of the wind turbine is also implemented in CROWBAR.
Appearance and dimensions:Mica interlayer structure and metal carrier grid structure

The specific dimensions are customized according to customer requirements.
Electrical specifications:

Standard value
Power Range 31-300KW
Voltage Range < 5KV
Value Range 0.05R-100R
Dielectric Strength AC3KV/1min 50Hz
Insulation resistance; Insulation Resistance 100M Ω Min
IP Class IP20-IP23 (optional)
Rated Temperature Rise 375 ℃
Temperature drift: 400-1260ppm/℃
Vibration Free of break or flying arc; △ R ≤ ± (1% R. 0.05 Ω)

Application environment:

The usage environment of RGCB wind energy resistors shall comply with the provisions of DL/T593-2006 3.1

Indoor: Surrounding air temperature: 40 ℃~-30 ℃;

Altitude: ≤ 25k;

Minimum nominal creepage distance: not less than 18mm/kV for porcelain and not less than 20mm/KV for organic materials.

Power frequency withstand voltage: The output terminal of the resistor and the housing (or mounting bracket) can withstand AC withstand voltage values of 50Hz and 3000V without breakdown or flicker, and the leakage current is not more than 10ma.

Note: When exceeding normal usage conditions, it shall be determined through negotiation between the user and the manufacturer.

Braking rate curve:

ED braking rate runs for 100 seconds per cycle, and the proportion of braking time is selected based on the braking current Udc/R and braking rate ED to select the braking unit

Model Description: