AVR Series — R120-Y
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R120 Industrial AVR Technical Specification Table
| Parameter / Feature | Specification Details |
| Product Model / Series | R120 / R120-Y Series |
| Primary Alternator Match | Leroy-Somer TAL044 Series (TAL044 A to K), LSA Series |
| Excitation Tech Mode | SHUNT / Half-wave phase-controlled thyristor |
| Generator Configuration | Compatible with 1-Phase and 3-Phase Brushless Generators |
| Sensing / Power Input | Jumper Selectable: 190 V – 240 VAC max (1-Phase or 2-Line 3-Phase) |
| Input Power Frequency | 50 Hz / 60 Hz Nominal |
| Magnetic Field Output | Max 95 VDC at 240 VAC input |
| Rated Excitation Current | Continuous: 4.0 A DC | Intermittent: 6.0 A (up to 30 seconds) |
| Voltage Regulation Precision | $\le \pm 1.0\%$ RMS (with 4% engine governing) |
| Voltage Adjustment Range | $\pm 10\%$ of rated voltage via built-in trimmer potentiometer |
| Residual Voltage Build-up | Minimal $\ge 2.0$ VAC required at AVR input terminals |
| Built-in System Trimmers | V-TRIM (Voltage), STAB (Stability), FRO (Frequency Roll-off) |
| Core Safety Matrix | Loss of sensing voltage protection, Over-excitation limiting (LED indicator), Under-Frequency Roll-Off (UFRO) |
| Physical Dimensions | 104 mm $\times$ 94 mm $\times$ 40 mm | Mounting pitch: 83 mm |
| Net Weight | Approx. 185g to 260g (depending on the potting insulation density) |
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