Decode AVR specifications including KVA rating, input voltage range, output voltage accuracy, response time, efficiency, and overload capacity. Make informed purchasing decisions.
KVA Rating and Power Capacity
KVA (Kilovolt-Ampere) indicates the apparent power capacity of an AVR. Understanding KVA ratings: For resistive loads (heaters, bulbs): 1KVA = 1kW. For inductive loads (motors, AC): 1KVA = 0.7-0.8kW depending on power factor. YOKE AVR range: 3KVA to 60KVA. Sizing considerations: Never exceed 80% continuous load for longevity. Add 30% margin for motor starting currents. Consider future expansion needs. Running an AVR at 100% capacity causes overheating and premature failure.
Input Voltage Range
Input voltage range determines where the AVR can operate. YOKE standard range: 140V-260V (for 220V systems). Wide range models: Some YOKE models accept 100V-280V. Narrow range models: More precise regulation but less flexibility. Matching your grid: For 220V countries (most of world): Standard 140V-260V range works. For 110V countries (US, Japan): Ensure you purchase 110V-specific model. For areas with severe fluctuations: Consider wide input range models for extra protection. The wider the input range, the more fluctuation the AVR can handle before activating protection shutdown.
Output Voltage Accuracy
Output voltage accuracy shows how precisely the AVR maintains voltage. YOKE accuracy specifications: SVC Series: ±1-2% accuracy (220V±2-4V). TND Series: ±2-4% accuracy (220V±4-8V). Why accuracy matters: Sensitive electronics (medical, lab) need <±2% accuracy. Standard appliances work fine with ±4-5% accuracy. Some equipment (MRI, CNC) requires <±1% for optimal operation. Higher accuracy means: Better protection for sensitive equipment. More stable operation of precision machinery. Reduced risk of data corruption in IT equipment.
Response Time and Correction Speed
Response time measures how quickly the AVR corrects voltage. YOKE response specifications: SVC Series: Response time <1 second, full correction <3 seconds. TND Series: Response time <0.5 seconds, full correction <1 second. Fast response benefits: Less exposure time for connected equipment to harmful voltage levels. Better protection against rapid fluctuations and spikes. Critical for sensitive equipment with narrow voltage tolerances. Trade-offs: TND faster response but step changes. SVC slower response but smooth, continuous correction. For most applications, either technology provides adequate protection.
Efficiency and Power Consumption
AVR efficiency indicates how much power is lost in the regulation process. YOKE efficiency ratings: SVC Series: 94-96% efficiency (4-6% power loss). TND Series: 96-98% efficiency (2-4% power loss). What efficiency means: A 10KVA unit at 96% efficiency loses 400W to heat. At 80% load, losses are lower than at 100% load. Higher efficiency = lower electricity costs over time. Additional losses: No-load power consumption when AVR is on but unloaded. Cooling fan power in larger units. Consider efficiency when: Calculating total cost of ownership. Planning cooling requirements for installation. Operating near full capacity continuously.
Understand AVR specifications before buying. YOKE provides detailed datasheets and expert consultation.
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