1. Introduction
The Mobile Combined Electrical Laboratory (MCEL) is a high-tech, self-contained diagnostic and testing unit mounted on a 4×4 high-mobility chassis. It is designed for field testing, maintenance, and fault detection in 35 kV power cable lines, relay protection systems, and automation equipment.
The laboratory integrates advanced high-voltage testing, insulation diagnostics, fault location, relay protection testing, and transformer diagnostics into a single mobile platform. It ensures safety, automation, and precision while operating in harsh environments.
2. Scope of Application
The MCEL is used for:
- Insulation resistance measurement
- Cable testing with DC, VLF (0.1 Hz), and impulse voltages
- Locating cable faults (acoustic, electromagnetic, reflectometric methods)
- Burning high-resistance faults
- Testing relay protection and automation devices
- Transformer diagnostics (ratio, winding resistance, insulation)
- Power quality analysis
3. Technical Requirements
3.1. General Specifications
- Chassis: 4×4 off-road vehicle with high ground clearance.
- Body: Insulated “sandwich” panel construction, with a partition between living and working compartments.
- Power Supply:
- 230V ±10%, 50 Hz (isolated transformer for safety).
- Backup power options (battery/inverter).
- Safety Systems:
- 5-level protection (InSAFE 5 module).
- Three grounding loops (protective, working, control).
- Automatic emergency shutdown.
- Environmental Resistance:
- Operational in -30°C to +50°C.
- Dustproof and moisture-resistant construction.
3.2. Key Functional Modules
A. Control & Operation Systems
| No. | Component | Specifications | Qty |
|---|---|---|---|
| 1.1 | InterCon M (Central Control Unit) | – Industrial PC with graphical interface – Self-diagnostics & alarms – Single-knob control | 1 |
| 1.2 | Control System M | Fully automated test sequencing | 1 |
| 1.3 | InSAFE 5 | – 5-level safety system – Grounding monitoring (<25Ω) – Emergency shutdown | 1 |
| 1.6 | Control Unit CM | 7″ touchscreen, Ethernet, USB | 1 |
| 1.7 | Industrial PC + Monitor | i5 processor, 22″ TFT, Windows OS | 1 |
| 1.8 | PRO-OCC (SMA) Software | Automated reporting, defect analysis | 1 |
B. High-Voltage Testing Systems
| No. | Component | Specifications | Qty |
|---|---|---|---|
| 2.1 | MX32-DC90 | DC testing up to 90 kV, 65 mA | 1 |
| 2.2 | MX32-VLF60 | VLF testing 0.1 Hz, 60 kV (90 kV peak) | 1 |
| 2.3 | MX32-STP15 | Sheath testing 15 kV, 300 mA | 1 |
C. Fault Location Systems
| No. | Component | Specifications | Qty |
|---|---|---|---|
| 3.1 | InterFlex Reflectometer | Range 95 km, pulse 160V | 1 |
| 3.2 | ART (Arc Reflection) | 32 kV pulse-arc method | 1 |
| 3.5 | BM15-D25 (Burning Unit) | 0-15 kV, 25A (stepless control) | 1 |
| 4.1 | MX32-SG2000 (Acoustic Generator) | 8/16/32 kV shock waves | 1 |
| 4.2 | Kamphone (Acoustic Locator) | Noise-filtering, 120-3000 Hz | 1 |
D. Relay Protection & Automation Testing
| No. | Component | Specifications | Qty |
|---|---|---|---|
| 6.1 | P-CMA 3XX | 6-phase current, 4-phase voltage 64A/860VA per channel | 1 |
| 7.1 | PHC8 (High-Current Tester) | 0-8000A (circuit breaker tests) | 1 |
| 7.2 | P-VIT (Winding Resistance) | 1 µΩ – 100 kΩ | 1 |
E. Transformer Diagnostics
| No. | Component | Specifications | Qty |
|---|---|---|---|
| 8.1 | CPA Basic | Turns ratio, excitation current | 1 |
| 8.2 | CPA CVT | CT/VT testing, magnetization curve | 1 |
| 8.3 | CPATDA | Tan delta, capacitance, insulation | 1 |
4. Additional Equipment
4.1. Cables & Connections
- DC110-H50 (50m HV cable drum, 110 kV)
- LV-Unit 50 (Low-voltage cables, grounding set)
- Warning light/sound alarm (magnetic mount)
4.2. Portable Test Devices
- M3102 Megohmmeter (2500V) – 3 pcs
- M312X Megohmmeter (1000V) – 3 pcs
- M9230 Clamp Meter – 3 pcs
- M9040 Digital Tester – 4 pcs
4.3. Tools & PPE
- Electrician’s toolkit (screwdrivers, pliers, wrenches)
- Power tools (drill, angle grinder)
- Dielectric PPE (gloves, boots, mats, helmets)
- Motorola radio set (handheld & vehicle-mounted)
5. Vehicle & Body Specifications
- Chassis: 4×4 off-road, 184 kW engine
- Body:
- Thermal-insulated sandwich panels
- Separate living & working compartments
- HV cable hatch in rear door
- Air conditioning & autonomous heater
6. Documentation & Spare Parts
- Operation manual
- Spare parts kit (filters, printer cartridges)
7. Conclusion
The Mobile Combined Electrical Laboratory is a fully integrated, automated, and safety-compliant solution for field diagnostics of 35 kV power systems. It combines high-voltage testing, fault location, relay protection checks, and transformer diagnostics in a single mobile unit, ensuring efficiency, safety, and precision in extreme conditions.
