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(Ⅰ)Very-low-Frequency Product
HRVLF Series of Portable 0.1HZ Digital Very-low-Frequency High Voltage Tester
 
   The new generation of AC withstand tester, replacing harmonic withstand tester, is widely used in AC withstand test of large capacity equipments such as generator, cable, insulator, power capacitor, large transformer etc. Not only can it be the first choice of on-site and outdoor testing, but also as the ultra-low frequency source.

Advantage of 0.1Hz HRVLF series
1、Small volume, light weight, easily to operate. Theoretically speaking, the capacity is of 1/500 of power Frequency.
2. AC ultra-low frequency tester doesn’t form tree-clearance in the insulating condition.
3. Unlike DC test, it’s uneasy to destroy cables; meanwhile the capacitance effect of testing articles has no influence to it.
4. Pernicious polarization charge would make no way to dielectric during the testing.

Features of function
1. Adopting digital convention technology and microcomputers controlling system make the testing process completely automatic.
2. The large screen of liquid crystal and Chinese input operating system insure that testing wave-form (Sinusoid Wave) can be displayed; testing reports can be printed.
3. Auto-protection of over-current and over-voltage, the research,design and manufacture of independent intellectual property rights according to power standard
4. Multi-frequency selections (0.1Hz,0.05Hz,0.02Hz) strengthen the load-bearing capability.

 
 
HRVLF-80/1.1 Digital Very-low-Frequency High Voltage Tester
 
  Specification of this series (special order testing equipment is also available)  
 
Type Rated voltage Carrier load capacity Weight
HRVLF-30/1.1
(applied for 10kv Large capacity product withstand testing)
30(40)KV
(peak)
0.1Hz,≤1.1uF
0.05Hz,≤2.2uF
0.02Hz,≤5.5uF
Controller:4kg
pressure Booster:25kg
HRVLF-50/5
Breakdown tester
( applied for 10kv extra Large capacity product withstand testing
50KV
(peak)
0.1Hz,≤5uF
0.05Hz,≤10uF
0.02Hz,≤25uF
Controller:5kg
pressure Booster:60kg
HRVLF-80/1.1
(applied for 35kv large capacity product withstand testing)
80(90)KV
(peak)
0.1Hz,≤1.1uF
0.05Hz,≤2.2uF
0.02Hz,≤5.5uF
controller:5kg
pressure booster:45kg
 
  1. Measuring accuracy: 2.5%
2. Voltage error of peak-peak: ≤2.5%
3. Distortion of voltage waveform: ≤5%
4. Using condition: indoor, outdoor: Temperature: -10~+40℃; Humidity: ≤85%RH
5. Power: AC 50HZ,220V±5%
6. Equivalence: scientific theories and tests can prove that 0.1Hz ultra-low frequency withstand testing is as equivalent as industrial frequency withstand testing.

Withstand testing comparison of 0.1Hz ultra-low frequency, industrial frequency, abnormal frequency and DC.
Items
Power frequency hi-pot testing
Variable frequency hi-pot testing
0.1Hz hi-pot testing
DC hi-pot testing
Equivalence
Good
Good
Good
Not so good
Insulation damage
Little
Little
Little
Large
Operating safety
Relatively low
Relatively low
high
Relatively low
Test wiring
Complex
Most complex
Simplest
Complex
Volume,weight of devices
Heaviest
Relatively heavy
Light
The lightest
 
  Our recommendation: Related articles of ultra-frequency technology
[1] [2] [3] [4] [5]
 
  (Ⅱ)Guard Equipment for Prison Grid  
 

HRJWG-10 High-voltage Guard Equipment for Outside Prison Grid
HRJWG-10 High-voltage Guard Equipment for Prison Grid
    This kind of device is equipped with real-time alarming and attacking function, and is most applicable as high voltage transformer guard equipment in grid of prison or detention house for security and justice system. Alarming control console is consisted of auto-alarming manual control console, non-microcomputer auto- alarming control console, microcomputer auto-alarming control console.

Technical Parameter:
1. Rated capacity: (prison) 10 (12) kVA, (detention house) 2 kVA
2. Output voltage: 10kV×2,2KV(5KV)×2
  Technical Documentation of HRJWG-10 High-voltage Guard Equipment for Outside Prison Grid
 
   (Ⅲ) Testing Equipment for Railway Locomotive  
 

HRTNZ Type AC 0-2000V Adjustable Stable Voltage Power Supply
HRTNZ Type AC 0-2000V Adjustable Stable Voltage Power Supply
    Input: AC 380V( single-phase), output AC 0-2000V,100A. It can be served as voltage fluctuation simulation source in railway locomotive DC 110V control source cabinet test-------as simulation test equipment for voltage operation of railway grid (25×(1+16%/1-25%)kV、25×(1+16%/1-34%)kV , With big magnitude of constant voltage fluctuation). This equipment can automatically adjust and stabilize voltage by manual control or numerical control. It also has a high output level, which far exceeds users’ need and tests’ requirement.
   
 
 
Repair and Maintenance of Generator Set for Power Station
Services: professional inspection & repair, routine major repair & maintenance, troubleshooting & maintenance of any types of generator sets, such as: hydraulic generator, steam turbine generator, medium or large generators. Within 4 hours after client’s requests, it can proceed to the fault diagnosis and troubleshooting, not over 72 hours for big troubles in the major repair. This service system resolves the trouble of time and workforce for power station, instead assures their profits in a large extend. Time is money, time is profit.

Professional Team: all the engineering technicians and workers of installing, debugging & inspecting are from professional manufacturing factory, which ensure the specialty and quality guarantee. (All the fixed generator sets can match the original installing and running technical data.)

Meanwhile, it manufactures and supplies detecting and testing equipment for generator sets: AC and DC withstand tester, detecting device and meter, such as hydraulic generator, steam turbine generator, partial discharge inspecting analyzer for generator stator, digital fault detector of composite insulators for generator stator winding, portable corona discharge detector, looseness detector for stator slot wedge, SF6, helium (hydrogen) leakage detector, etc.

In addition, all types of main and auxiliary equipment for generator set are also available.

 
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