HVHIPOT Onsite GIS testing high voltage test system (GIT series)

• After-sales Service: YES
• Warranty: 1
• Voltage Grade: 100kv, 200kv, 250kv, 300kv, 500kv, 750kv, 1000kv
• Capacity: 50-2000kVA
• Input Voltage: 0.35-10kv
• Partial Discharge Capacity: Rated Voltage 3PC
• Model NO.: GIT series
• Impedance Voltage: 5%
• Temperature Rise: No More Than 65k (50Hz) When Rated Current Operate
• Grounding system: ≤2Ω
• Transport Package: Container
• Specification: ISO, SGS
• Trademark: HV Hipot
• Origin: Wuhan China
• HS Code: 9031809090
• Production Capacity: 50PCS/Year

Product Description

GIT Series GIS High Voltage Test Set

Product Description

The system is especially designed for testing GIS in the factory and on-site test, and for testing all GIS switchgears and GIS components such as insulators, insulating tension pole, GIS voltage transformer etc. As its good encapsulation, it can perform PD test in normal environment. When it tests partial discharge, the PD level is less than 3pc, and it can be added a HV bushing to perform the withstand voltage test at the same time.

 

Features

• Small and compact dimensions resulting in minimum space requirements .
• Light weight. Rugged construction to withstand long transportation stresses.
• Direct flanging to the test object.
• High safety because of encapsulation of all HV parts .
• Large range of application in conjunction with HV bushing for withstand voltage test.
• Built-in HV measuring capacitor and coupling capacitor.
• Built-in HV disconnecting switch to separate multipath test object connector to ensure the safety of HV testing.

System Configuration

A-  Voltage regulator                    B-  Isolation transformer     

C-  Compensating reactor            D-  SF6 HV testing transformer       

E-  Capacitive divider                   F-  Coupling capacitor

G-  Basin type insulator                H-  Disconnecting switch   

I-   Multi-path disconnecting switch    J-  Multi-path test object connector  

K-  SF₆  HV bushing                     L-  Computerized control unit

M-  PD detector

 

Basic configuration

Cylinder type voltage regulator (Frequency variable power source used in the GIS voltage transformer test system)

Isolation transformer

Compensating reactor

SF6 HV testing transformer

Capacitive divider  

Basic interface

Control system

 

Optional Configuration

Coupling capacitor

Partial Discharge detector

SF6 HV bushing and disconnecting switch

Various connection or adaptation flanges according to different test objects

Universal adjustable platform for testing GIS switchgear

Standard voltage transformer(Only for GIS HV testing system)

 

Function of the testing system

1. The encapsulated test transformer is a conventional transformer and step-up the

voltage coming from the voltage regulator. The compensating reactor connect with the HV transformer primary winding to compensate the capacitive current. (The HV transformer LV side has an independent compensating winding.)

 2. For the on-site testing system, the voltage regulator, compensating reactor, isolating transformer and control system are integrated into a cabinet. It gives a most compact equipment with a minimum number of components to be transported and connected for testing.

3. Using HV disconnecting switch to disconnect all types of test object connector to achieve widely use.

4. Three-phase change-over switch to test three phase in box system.

5. Universal adjustable platform to make HV transformer flange test object more conventional.

Specifications

 

1.  GIT HV Testing transformer
The HV testing transformer is the most important part of this system, it is housed in a special tank which is insulated by SF₆ gas and is terminated on its HV side by a basin type insulator. All LV terminals are housed in a connection box.

The LV windings is divided into 2 groups: excitation winding and measurement winding (Measurement winding is used for system testing). For the high capacity (up to 500KVA) transformer, it has the independent compensation winding to allow better flexibility in function of the test voltage & load, which enhances the compensating reactor efficiency.

Aerating/vacuum connector, pressure monitor, over-pressure release valve, temperature and pressure sensor are incorporated in the GIT tank, for the remote monitoring by the computerized control unit.              

Technical data of the GIT transformer series at 50HZ

Voltage Un KV	Current  A	PD level At Un (pC)	Short circuit Impedance	Voltage regulator capacity	Temperature rise
250	0.5-5A	≤3pC	≤6%	50	≤50K
350
400
500	0.5-4A			50-100
550
600
800	1.0-3A	≤5pC		100-200
1000
1200

Remark: The rated capacity of GIT transformer is Max.output of the HV testing transformer. If other components like coupling capacitor, capacitive divider, bushing,  connecting flange and basin type insulators are added, the supply power consumption to the test object will be reduced.

2. Voltage regulator

It is air-insulated Cylinder type voltage regulator, which output voltage smoothly.This part is put in a chassis together with isolation transformer, compensation reactor, for convenient transportation. Both input and output terminal of voltage regulator install air-break and power system isolation. It can adjust motor at fast and slow speed. The zero-start interlock ensure the voltage regulated from zero.

Technical data of the voltage regulator

Capacity (kVA)	Input voltage    (V)	Output voltage    (V)	Input current    (A)	Dimensions L×W×H(m)	Weight (kg)
50	380	0-400	125	1.5×0.5×1.6	520
100			250	1.5×1.0×2.0	850
150			375	1.5×1.6×2.0	1520
200			500	1.5×2.0×1.8	1750

 3. Isolation transformer

This device is designed for reducing the interference from main power line and ensured the PD value is less than 1pC when making PD test.

 The capacity of Isolating transformer is comply with voltage regulator.

 4. Capacitive divider

 The measuring signal is from the built-in HV capacitive divider of the GIT transformer.

The equipped peak voltmeter displays HV peak voltage, peak value/√ 2 and RMS.

 Measurement accuracy:±1% of the measured value(10-100% of rated voltage) 

Ratio: 10000:1

Rated capacitance: 50pF

Rated voltage: 600kV

PD level: ≤2pC

5. Coupling capacitor

The coupling capacitor is installed in a gas insulated tank. The HV electrode connected with HV terminal by the basin type insulators. As it is installed in a full sealed metal tank, the PD measurement is very sensitive and can not be effected by other stray capacitance. The LV electrode was connected with measurement impedance by the shielding wire.

Rated voltage: 600KV

Rated capacitance:100pf

PD level:≤2pc