Level 4 Acceptance Test Equipment
On December 1, 2017, the National Energy Administration made corresponding adjustments to the qualification equipment for electric power acceptance tests. The qualification equipment for acceptance tests in each province is the same, while some equipment that is not commonly used in actual work by electric power enterprises has been omitted. Obtaining the Level 4 acceptance test qualification allows for the installation, maintenance, or testing of electric power facilities with voltage levels below 35 kV.
Level 4 acceptance test equipment includes series resonance, power frequency withstand voltage test devices, DC high voltage generators, induced voltage withstand test devices, dielectric loss testers, loop resistance testers, and transformer ratio testers.
Article 17: Those who obtain the Level 4 acceptance test category of the Installation (Repair, Test) Electric Power Facility Permit may engage in testing activities for electric power facilities with voltage levels below 35 kV. Applicants shall meet the following conditions:
(1) Legal person status and a sound organizational structure;
(2) Net assets of no less than 6 million RMB;
(3) The technical director and safety director shall have at least 3 years of experience in managing electric power facility testing, and hold at least a junior technical qualification in a power-related specialty;
(4) At least 10 professional technical and economic management personnel, including at least 4 engineering and technical personnel in power-related specialties;
(5) At least 6 electricians with grid access operation permits, including at least 2 high-voltage electricians and at least 3 special-type electricians;
(6) A sound and effective safety production organization and system, with safety training conducted in accordance with the law, and at least 1 safety management personnel;
(7) A fixed business site with a total area of no less than 400 square meters, with various professional laboratories and testing equipment for electric power facilities with voltage levels above 35 kV;
(8) A sound technical archive management system.
Level 4 Acceptance Test Configuration Table
| No. | Equipment Name | Model | Specification | Unit | Quantity |
| I | High Voltage Generation Equipment | ||||
| 1 | DC High Voltage Generator | ZGF-120kV/2mA | DC: 120kV/2mA | Set | 1 |
| 2 | Power Frequency Withstand Voltage Test Device | YDJ-30kVA/50kV | AC: 30kVA/50kV | Set | 1 |
| YDJ-10kVA/50kV | AC: 6kVA-10kVA/50kV | Set | 1 | ||
| 3 | Variable Frequency Series Resonance Test System | HTXZ-75kVA/75kV | 75kVA/75kV/1A 30～300Hz | Set | 1 |
| 4 | Induced Voltage Withstand Test Device | SBF-5kVA/500V | 5kVA/360V 150Hz | Set | 1 |
| II | Electrical Measuring Instruments | ||||
| 1 | High Voltage Dielectric Loss Tester | HTJS-V | 1. Dielectric measurement accuracy: 1% 2. Capacitance accuracy: 0.5% 3. Anti-interference variable frequency | Unit | 1 |
| 2 | Three-Phase Relay Protection Tester | HT-1200 | Three-phase voltage and current, 2 groups each | Unit | 1 |
| 3 | Loop Resistance Tester | HTHL-100A | DC: ≥100A | Unit | 1 |
| 4 | Transformer Volt-Ampere Characteristic Tester | HTFA-103 | 500V/5A | Unit | 1 |
| 5 | Ground Resistance Tester | HT2571 | Unit | 1 | |
| 6 | Transformer DC Resistance Tester | HTZZ-10A | DC: ≥10A | Unit | 1 |
| 7 | Transformer Ratio Tester | HTBC-H | Digital, Class 0.5 | Unit | 1 |
| 8 | Circuit Breaker Characteristic Tester | HTGK-III | Unit | 1 | |
| 9 | Insulation Resistance Tester | GM-5kV | DC: 0～5000V 200G(Ω) Short-circuit current ≥3mA | Unit | 1 |
| III | Common Instruments and Meters | ||||
| 1 | Megohmmeter | HT2671 | DC: 2500V | Piece | 1 |
| 2 | Megohmmeter | HT2670 | DC: 500V | Piece | 1 |
| 3 | Digital Dual-Clamp Phase-Volt-Ampere Meter | SMG2000B | Measurement current 1mA～5A | Piece | 1 |
