In motor coil repair, insulation failure in high-voltage or explosion-proof motors often stems from aging or moisture. Traditional atmospheric dipping fails to overcome surface tension within windings, leaving micro-voids that trigger corona discharge during operation. A leading motor service center adopted the ZH-1200 Automated VPI (Vacuum Pressure Impregnation) system to address the root cause of porous insulation in repaired components.
To ensure every repaired stator and rotor receives ultimate insulation protection, the facility implemented the ZH-1200 system, compliant with GB150-1998 standards for steel pressure vessels.
Before impregnation, components are processed in the Φ1200 × 1000mm effective work zone. The system utilizes a dual-stage vacuum unit—comprising a 2X-30 rotary vane pump and a ZJ-150 Roots pump—delivering a powerful pumping speed of 150L/S. This configuration rapidly reduces pressure to the 1000~100000 Pa range, ensuring that even in complex repaired coils, deep-seated air and moisture are fully exhausted for unobstructed resin saturation.
Following vacuum filling, the system automatically switches to pressure mode. Supported by a 12MPa hydraulic locking mechanism, a 1.0MPa design pressure is applied within the tank. This forces the resin into the deepest layers of tight windings, achieving a fill rate that significantly improves heat dissipation and dielectric strength, matching or exceeding OEM standards for repaired motors.
Given the intermittent nature of repair operations, preserving resin quality is vital. The ZH-1200 features a 100mm thick cooling jacket on the storage tank, utilizing a 40% ethylene glycol solution. Integrated with PT100 temperature sensors, the system precisely regulates resin temperature to prevent premature polymerization. This thermal management ensures that every motor, regardless of its repair schedule, receives protection from a stable and consistent insulation medium.
By adopting the ZH-1200 VPI system, the repair center transitioned from "experience-based repair" to "data-driven engineering." From JB/T7674-95 compliant vacuum design to automated low-level alarms, every parameter translates into a reliability guarantee, helping the service provider build a technical reputation in the specialized motor repair market.
In motor coil repair, insulation failure in high-voltage or explosion-proof motors often stems from aging or moisture. Traditional atmospheric dipping fails to overcome surface tension within windings, leaving micro-voids that trigger corona discharge during operation. A leading motor service center adopted the ZH-1200 Automated VPI (Vacuum Pressure Impregnation) system to address the root cause of porous insulation in repaired components.
To ensure every repaired stator and rotor receives ultimate insulation protection, the facility implemented the ZH-1200 system, compliant with GB150-1998 standards for steel pressure vessels.
Before impregnation, components are processed in the Φ1200 × 1000mm effective work zone. The system utilizes a dual-stage vacuum unit—comprising a 2X-30 rotary vane pump and a ZJ-150 Roots pump—delivering a powerful pumping speed of 150L/S. This configuration rapidly reduces pressure to the 1000~100000 Pa range, ensuring that even in complex repaired coils, deep-seated air and moisture are fully exhausted for unobstructed resin saturation.
Following vacuum filling, the system automatically switches to pressure mode. Supported by a 12MPa hydraulic locking mechanism, a 1.0MPa design pressure is applied within the tank. This forces the resin into the deepest layers of tight windings, achieving a fill rate that significantly improves heat dissipation and dielectric strength, matching or exceeding OEM standards for repaired motors.
Given the intermittent nature of repair operations, preserving resin quality is vital. The ZH-1200 features a 100mm thick cooling jacket on the storage tank, utilizing a 40% ethylene glycol solution. Integrated with PT100 temperature sensors, the system precisely regulates resin temperature to prevent premature polymerization. This thermal management ensures that every motor, regardless of its repair schedule, receives protection from a stable and consistent insulation medium.
By adopting the ZH-1200 VPI system, the repair center transitioned from "experience-based repair" to "data-driven engineering." From JB/T7674-95 compliant vacuum design to automated low-level alarms, every parameter translates into a reliability guarantee, helping the service provider build a technical reputation in the specialized motor repair market.
