Voltage Regulator

About

What is a voltage regulator (variac)? A voltage regulator (also called a variac or auto-transformer) is a continuously-variable single- or 3-phase autotransformer whose output voltage can be adjusted by a rotating brush across the windings. Used in motor test benches, laboratory equipment commissioning, voltage-sensitive equipment burn-in, and for compensating long-term WAPDA voltage sag. Distinct from a voltage stabilizer (which auto-regulates) and an inverter (which converts DC to AC). The CNC TDGC2-5000VA 1-phase variac (220 V in, 0–250 V out) and TSGC2-5000VA 3-phase variac are the standard Pakistani-market sizes; complies with IEC 60076 for transformers. Model VA Phase Vin / Vout TDGC2-5000VA 5000 VA Single-phase 220 V → 0–250 V TSGC2-5000VA 5000 VA 3-phase 380 V → 0–430 V Available on order at cncelectric.pk — 4–6 week lead time for fresh import. See the available-on-order catalogue . Updated: September 2026 · CNC Electric Pakistan Voltage Regulator + Stabilizer Guides (Updated June 10, 2026) Voltage Stabilizer Relay vs Servo News Voltage Regulator Servo vs Relay Sizing Regulator vs Stabilizer vs Protector Best Voltage Stabilizer for AC 1-Ton to 10-Ton Voltage Protector Buying Guide 3-Phase Voltage Protector 25A-200A Best Electrical Equipment Tiers Pakistan 2026 Hybrid vs On-Grid vs Off-Grid Solar Inverter Voltage Stabilizer / Regulator — Pakistan Quick Answer (May 2026) A voltage stabilizer (also called automatic voltage regulator, AVR) in Pakistan continuously adjusts incoming WAPDA / K-Electric voltage to maintain a steady 220V ± 10V output, regardless of mains swings between 140V and 280V. Unlike a voltage protector (which only disconnects in extremes), a stabilizer keeps power flowing — essential for inverters, refrigerators, water pumps, and CNC machines that can't tolerate voltage drops. CNC 2026 prices range from Rs. 8,500 (1 kVA) for single appliances to Rs. 185,000 (30 kVA 3-phase) for whole homes / commercial. Use Case Capacity Type 2026 PKR Single