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Test Object and Requirement
The system is specially designed for AC withstand voltage test for below items, with below specifications and requirements.
| Test Object | Specifications | Test Frequency | Test Voltage | Test Time |
| Power cable | 170kV/2000mm2/10km Capacitance ≤2μF | 30-300Hz | 150kV | 15 mins |
| Power cable | 400kV/2000mm2/5km Capacitance ≤0.6μF
| 30-300Hz | 220kV | 15 mins |
| GIS | 400kV and below Capacitance ≤0.02μF | 30-300Hz | Max. 750kV |
|
Capacity Determination of the equipment:
4pcs Reactors will be designed, each reactor is 2500 kVA/150kV. Capacity amount is 10000kVA.
Determination:
1) When to do AC withstand voltage testing on 170kV 2000mm2 10kM power cable.
Using 4pcs reactors in paralleled.
Output 150kV/66.6A, testing current is calculated as below:
I=U×103×ω×C×10－6=66A （U：150kV，C：2uF，ω＝2πf (f=35Hz)）
2) When to do AC withstand voltage testing on 400kV 2000mm2 5kM power cable,
Using 2pcs reactors in series and then these two groups in paralleled.
Output 300kV/33.3A, testing current is calculated as below:
I=U×103×ω×C×10－6=29A （U：220kV，C：0.6uF，ω＝2πf (f=35Hz)）
3) When to do AC withstand voltage testing on 400kV and below voltage degree GIS and etc. equipment, the capacitance is 0.02 uF,
Using 4pcs reactors in series, output 600kVA/16.6A, resonant frequency and testing current is calculated as below:
I=U×103×ω×C×10－6=3.3A （U：512kV，C：0.02uF，ω＝2πf (f=50Hz)）
| REACTORS
TEST OBJECT | Testing Voltage (kV) | REACTOR 2500KVA/150kV | OUTPUT VOLTAGE OF EXCITING TRANSFORMER |
| 170KV Power Cable | 150 | 4 pcs reactors in paralleled | 7.5KV |
| 400KV Power Cable | 220 | 2 pcs reactors in series, then two groups in parralled | 15kV |
| 400kV GIS | 512 | 4 pcs in series | 30kV |
| No. | Name | Module No. & Specs | Quantity |
| 1 | Exciting Transformer | SXJB-500kVA/7.5kV/15kV/30kV/ | 1 set |
|
2 | Variable frequency power supply | SXBP-500kW/380V/220V | 1 set |
| 3 | HV Reactor | SXDK-2500kVA/150kV | 4 pcs |
| 4 | Capacitive Divider | SXFR-150 kV -1000 pF | 1 set |
| 5 | Connecting Cable | Accessories are as Table I. | 1 set |
| 6 | Factory Test Report |
| 1 copy |
| 7 | User's Guide |
| 1 copy |
Please contact Sansion Power: kelly@sansionpower.com for further information.
