NRXZ Series Frequency Series Resonant

NRXZ Series Frequency Series Resonant

Classification: Partical Discharge/AC DC hipot test set

Reference standard: GB50150-2006,DL/T849.6-2004

Verification:  View the certificate

Instructions:  DOC Instructions

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Tel: 027-87207771 87207772 87207773 87188862

Verification certificate


Product introduction

NRXZ series frequency series resonant is mainly designed for 10kV, 35kV, 110kV, 220kV, substations and loop and all electrical main AC voltage test equipment design and manufacturing. Reactor uses more than just separate design, not only can meet the high-voltage, low-current device test conditions requirements, but also can meet the low voltage AC voltage test ing requirements. It has a wide scope, is the ground, city, county high voltage test departments and electrical installation, repair and test engineering units ideal for pressure equipment.

Alternative name

Frequency resonant, frequency series resonant , series resonance, series resonant transformer, series resonant testing device, portable cable withstands testing device, series resonant system

The Characteristics of the products

1,Reduce the power capacity greatly. The series resonant power supply utilizing the resonant reactor and the sample capacitor resonant generate high voltage and high current. In the whole system , the power system only provide the part of the active consumption, therefore, the needed power is  1 / Q of the testing capacity.
2,Reducing the weight and volume greatly. In the eries resonant power supply , not only to eliminate bulky power regulator, power instruments and other common frequency test transformer and resonant excitation power simply test the capacity of 1 / Q, making the system significantly reduces the weight and volume , usually common test instrument 1/10-1/30 .
3,To improve the output voltage waveform. Resonant power supply is a resonant filter circuit , can improve the output voltage waveform distortion, get a good sine wave , effectively prevent the harmonic peak error for the test product breakdown .
4,To prevent large short-circuit current fault burns . In the series-resonant state, when the test insulation breakdown weaknesses , the circuit is immediately off the harmonic , the loop current is rapidly decreased to normal test current of 1 / Q. The parallel resonant transformer test or way of doing pressure test , the breakdown current immediately increased several times, both compared to short-circuit current and the breakdown current difference between the number of times. Therefore, the series resonance can effectively find insulation weaknesses, without the presence of large short-circuit current suffering burns the point of failure .
5,There will be no recovery overvoltage. Sample breakdown occurs when the loss of resonance conditions , the high voltage is also disappear immediately , instantly extinguish the arc , and the recovery voltage re- building process is very long, it is easy to reach flashover voltage again before disconnecting the power , this voltage is restored process is an intermittent oscillation energy accumulation process , the process is long , and that

The parameters of the products
Item Parameter Data
Variable frequency 
(1 piece)
Rated power 5.5-500kW
Input voltage Three-phase is 380V ± 5% or single-phase is 220V ± 5%, 45 ~ 65Hz, when the power supply is 380V, can do the test of rated load; when the power supply is 220V, only can do the test of half load.
Output voltage

0 ~ 400V adjustable

Output voltage

20 ~ 300Hz

0.1Hz step adjustable
≤ 0.02%
Output Current 13 ~ 1250A
High Voltage
(1 set)
Rated voltage 0-1000kV
Rated current 1-10A
working time
15 minutes
less than 60 degrees
20 ~ 300Hz
(1 piece)
Rated Capacity 3.5-500kVA
Input voltage when capacity is 5.5 ~ 20kW, the input voltage is 200V/400V; 
when the capacity is 20 ~ 500kW, the input voltage is 400V.
(1 piece)
Capacitance 300-5000pF
Rated voltage 10-1000kV
20 ~ 300Hz
Uncertainty 1.0%
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Product information