Motor Start Capacitor (MMK Series)
Sits in the start winding circuit; higher capacitance than a run capacitor, typically 70 to 120 µF. Gives the initial push to start rotation; without it the motor only hums.
Key Features
- Self-healing properties
- Long lasting life
- High insulation resistance
- Low dissipation factor
Electrical Specifications
| Life | 1.15 x Un / 85°C, 1000 h intermittent (3 s ON / 3 min OFF) |
|---|---|
| Capacitance | see TDS |
| Tolerance | ±5% |
| Voltage | 275 V AC |
| Freq | 50 Hz |
| Tan δ @27°C, 1 kHz | < 7 x 10^-3 |
Test Data
| AC test TT | 2.0 x VR, 2 s (routine) |
|---|---|
| Duration | 21 days |
| Temp | -25°C to +85°C |
| Damp heat | 21 days |
| Vmax | 1.1 x VR |
| Imax | 1.3 x IR |
Construction
| Case | PP |
|---|---|
| Dielectric | MPP |
| Impregnation | dry PU resin (NPCB compliant) |
| Terminals | flexible wire, Faston on request |