Entogo
Voltage Regulation & Power Quality
Feeder voltage regulation, low-voltage stabilization and reactive-power compensation perform different duties.
A feeder step voltage regulator controls network voltage; an industrial stabilizer controls the supply to connected loads; a capacitor bank compensates reactive power. Describe the measured problem first, then provide voltage variation, load profile and the required control response.
Voltage Regulation & Power Quality
Step Voltage Regulator (SVR)
Entogo supplies step voltage regulators for feeder voltage control. Reference configurations span 2.5–19.92 kV; select line current, insulation, connection and controller together rather than treating regulator kVA as total feeder capacity.
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Voltage Regulation & Power Quality
Automatic Voltage Stabilizer (AVR)
Entogo supplies industrial automatic voltage stabilizers for loads exposed to supply variation. Specify the full input-voltage range, output tolerance, load current, starting duty and bypass arrangement before selecting the kVA.
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Voltage Regulation & Power Quality
Automatic Power-Factor-Correction Capacitor Bank
An automatic power-factor-correction (PFC) capacitor bank for 480 V, 60 Hz systems — stepped, controller-switched kVAR with detuned harmonic-filter reactors to raise power factor, cut demand charges and free up transformer capacity. Designed to UL 810, IEEE 18 and NEMA CP-1; UL/CSA certifiable.
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Design references
Power & Distribution
De-energized taps or a load tap changer? Specifying transformer voltage regulation
Transformer regulation is %R cos θ + %X sin θ plus a small quadratic term. A 1500 kVA, 5.75 %Z unit at 0.85 PF drops 3.85 %, so a 13.3 to 14.0 kV primary needs the 13 455 V tap to hold 456 to 504 V. The full ANSI C84.1 Range A primary swing needs an OLTC or a step regulator.
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Power & Distribution
Power factor correction: how to size a capacitor bank and clear a utility penalty
Power-factor capacitor sizing uses Qc = kW x (tan phi1 - tan phi2). An 800 kW load at 0.78 power factor needs 379 kVAR to reach 0.95, so a 400 kVAR bank is specified. BC Hydro's graduated surcharge reaches 16 percent below 80, Hydro One bills on 90 per cent of kVA, and PG&E adjusts 0.06 percent per point off 85.
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Power Quality
Harmonic distortion: what IEEE 519 requires and how to meet it
Harmonic distortion from VFDs, EV chargers, and data-center power supplies can breach IEEE 519 limits and quietly overheat neutrals, transformers, and switchgear. This guide explains the 519-2022 voltage and current limits and how to specify mitigation before it becomes a field problem.
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For Canadian and US projects, include the utility specification, service frequency and required approvals. State whether the order is for the transformer alone or an integrated equipment package.
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