Products
Nine product families, each rated from a measurement of the site supply.
Stabilizer and isolation in one cabinet
Spikes, surges and ground noise from welders, drives and capacitor switching cause most CNC breakdowns. Powercon puts servo voltage correction and ultra isolation in one cabinet, so one install handles both.
| Input voltage | 340–480 V or 300–480 V AC |
|---|---|
| Phase | 3-phase 4-wire |
| Frequency | 47–53 Hz |
| Output voltage | 380, 415 or 200 V AC |
| Regulation | ±2% steady state, ±5% dynamic |
| Rate of correction | Up to 105 V/s |
| Cooling | Air-cooled |
| Ambient | 0–45 °C, 90% RH |
| Common-mode noise rejection | 100 dB |
| Normal-mode noise rejection | 40 dB |
| Duty | 100% continuous · 110% for 60 s · 200% for 10 s |
| Metering | Voltage and currents |
| Protection | Under/over voltage, overload, short circuit |
| Enclosure | IP 21 |
| Ratings | 10, 15, 20, 25, 30, 40, 50, 60, 75, 100, 125, 150, 200, 250 kVA |
Steady voltage from an unstable supply
Digivolt servo voltage stabilizers, manufactured by NEEL in India, hold output voltage steady when the supply drifts. NEEL sizes the equipment from a measurement of your site supply. Use the configurator to select the supply phase, input voltage window, rating, output voltage, output regulation and cooling option. Leave any unknown option as “NEEL to advise”.
| Nominal voltage | 230 V single-phase · 415 V three-phase 4-wire |
|---|---|
| Regulation | ±1% or ±0.5% |
| Supply frequency | 47–53 Hz |
| Efficiency | Better than 98% |
| Waveform distortion | Nil |
| Effect of load power factor | Nil |
| Ambient | 0–45 °C, RH up to 90% |
| Environment | Indoor, tropicalised |
| Enclosure | IP 21 |
| Ratings by supply | |
| 1φ · 170–270 V | 1, 2, 3, 5, 7, 10, 12.5, 16, 20, 25 kVA, air-cooled |
| 3φ · 340–480 V | 5–150 kVA and 60–2,500 kVA executions |
| 3φ · 300–480 V | 3–100 kVA air-cooled · 75–1,500 kVA oil-cooled |
“We have been using your stabilizer, model II-250/T, 1,200 kVA, Neel make, for the last 12 years and its performance is excellent.”
Galvanic isolation against transients and noise
NEEL ultra isolation transformers provide galvanic isolation against spikes and line noise. They do not correct supply voltage. A servo stabilizer holds output voltage steady when the supply drifts; Powercon combines voltage correction and spike suppression in one unit for CNC machines.
| Noise band addressed | 1 kHz to 100 MHz and above |
|---|---|
| Spike magnitude handled | 4,000–6,000 V on 3-phase systems |
| Attenuation | 100 dB and 120 dB standard; coupling capacitance scales with dB level |
| Ground | Separately derived source; secondary N–G bond |
| Direction | Bidirectional |
| Typical loads | CNC machines, computers, telecom, drives, hardening equipment |
“We have been using Neel make voltage stabilizers and ultra isolation transformers for our CNC machines for the last ten years. We have found the products and services rendered by them to be satisfactory and useful to us.”
Full rating on harmonic loads
Drives, UPS and IT loads overheat standard transformers. NEEL K-rated units use low eddy-loss copper, reduced-flux cores and a double neutral to run harmonic loads at full rating. K-factor is chosen from your measured spectrum; K-13 suits most sites.
| kVA rating | Up to 750 kVA |
|---|---|
| Impedance | 3 to 4% |
| Input voltage | 415 V (other voltages on request) |
| Output voltage | 415 / 200 V (other voltages on request) |
| Configuration | Delta/Star or Zig-Zag |
| Construction | Dry type, double wound, air-cooled, common core, varnished and vacuum impregnated |
| Windings | Copper |
| Neutral conductor rating | 200% |
| Frequency | 50 / 60 Hz |
| Insulation class | H / 180 °C |
| Maximum temperature rise | 125 °C |
| Enclosure | MS, IP 21 |
| Finish | Siemens grey, RAL 7035 (others on request) |
| Flash / HV test | 2,500 V winding–winding and winding–earth |
| Ambient | 0 to +45 °C, 0 to 90% RH non-condensing |
| Reference standards | UL 1561, IEEE C57.110, IS 11171 |
Zero transfer time
True online double conversion with IGBT PWM inverters. Fast response for high-crest-factor loads: CNC, textile, printing, medical, servers. Static bypass built in. RS-232/485 interlock available for CNC.
| Input | |
|---|---|
| Voltage | 230 V 1φ or 415 V 3φ 4-wire, +15% / −20% |
| Frequency | 47–53 Hz |
| Output | |
| Ratings | 1 / 2 / 3 / 7.5 / 15 / 20 kVA 1φ · 10 / 20 / 30 / 40 / 50 / 60 / 75 / 100 / 120 / 150 / 200 / 250 / 300 / 400 / 500 kVA 3φ |
| Voltage | 220 / 230 / 240 V 1φ · 380 / 400 / 415 V 3φ |
| Regulation | ±1% for unbalanced load |
| Phase displacement | 120 ±1° at 100% unbalanced load |
| Power factor | 0.8 |
| Crest factor | 3:1 |
| Frequency | 50 Hz ±0.1% |
| Harmonic distortion | <3% THD linear, <5% THD non-linear |
| Overload | 110% 30 min, 125% 10 min, 150% 60 s |
| Transient response | ±5% for 100% step load |
| Recovery | To ±1% within 5 ms |
| System | |
| Efficiency | Inverter >95%, overall >92% |
| Rectifier protection | Input over/under voltage, DC over voltage, charging over-current, single-phasing, reverse phase sequence |
| Inverter protection | Output over/under voltage, overload, short circuit, DC under voltage, over temperature |
| Metering | LCD/LED mimic: I/P & O/P voltage, battery voltage, I/P & O/P current, battery charge, I/P & O/P frequency |
| Controls | Input MCB/MCCB, bypass, output switch, manual bypass, inverter on/off |
| Enclosure | IP 31 (IP 42 optional), bottom cable entry (top optional) |
| Environment | 0–45 °C, up to 95% RH non-condensing, forced-air cooling, up to 300 m above MSL |
| Audible noise | <60 dB up to 100 kVA · <75 dB up to 500 kVA |
| Standards | IEC 146-(IV), EN 50091-1, EN 50091-2 |
| Options | Remote start/stop, RS-232/485 CNC machine interlock |
Continuous ground and leakage current monitoring
Many power problems start with wiring and grounding. Superintend watches ground and leakage current continuously and alarms on faults too small to trip a breaker. Elecrama 1999 Best Product Appreciation Award.
| Model | VR-12 · VRE-10 · VRE-11 · VRE-80 |
|---|---|
| Supply | 230 V 50 Hz · 18–24 V AC · 230 V 50 Hz · 230 V 50 Hz |
| Power consumption | 1.5 VA · 1.5 VA · 1.5 VA · 4.5 VA |
| Measuring range | 30 mA to 10 A · 5 mA to 9.99 A · 1 mA to 10 A · 1 mA to 11 A |
| Accuracy | ±5% closed CT, ±10% split CT |
| Measuring cable | Max 32 ft (VR-12) · max 300 ft (others) |
| Alarm setting | 30 mA to 10 A · 10 mA to 9.5 A · 10 mA to 10 A · 5 mA to 10 A |
| Delay setting | 0.1–10 s · 0.14–60 s · 0.14–60 s · up to 95 s |
| Analogue output | 1 mV = 1 mA, 1 mV to 2.5 A (VRE-11, VRE-80) |
| VCPU multi-channel | |
| Channels | 16 |
| Supply / consumption | 230 V 50 Hz / 70 VA |
| Measuring point | Local 10 mA to 11 A (max 300 ft) · remote 30 mA to 11 A (max 3,000 ft) |
| Alarm setting | 30–9,999 mA, delay up to 99 s |
| Alarm relay | 2 change-over contacts, max 30 V AC 1.25 A |
Thyristor-switched, cycle-by-cycle correction
Welding, CNC, cranes and induction heating change reactive demand within cycles. Contactor-switched banks cannot respond at that speed. NEEL RTPFC switches capacitors with SCRs at zero crossing: real-time correction, no inrush, no contact wear. Available detuned, tuned or per-phase.
| Reactive power | 100–2,000 kVAR |
|---|---|
| Rated voltage | 380–690 V |
| Frequency | 50 / 60 Hz |
| Switching device | SCR modules |
| Capacitors | Low loss, self-healing, IEC 60831-1/2 |
| Reactors | Low loss iron core |
| Current limiting | 5.6%, 7%, 14% or tuned |
| Display | Backlit LCD, menu driven |
| Measurements | Phase–phase and phase–neutral V, I, F, kW, kVA, kVAR, PF, THD-V, THD-I, temperature, harmonics and fault information |
| Interface | RS-232, RS-485 / Modbus, Ethernet |
| Enclosure | Modular sheet metal, epoxy powder coat RAL 7032 |
| Typical applications | |
| Industry | Welding lines, CNC machines, induction heating, drives, extruders, rolling mills, cranes and elevators |
| Buildings and utilities | Data centres, hospitals, HVAC plants, pumping stations and wastewater plants |
Real-time harmonic compensation
NEEL active harmonic filters provide real-time harmonic compensation as the load changes. NEEL sizes the filter after measuring harmonic current at your point of connection. If you do not have a measurement report, select “No measurement yet, include a power quality survey” in the configurator.
Programmed dimming and switching for lighting loads
Powerlux cuts lighting energy by up to 40%. It controls the supply to lighting circuits across a facility. It dims and switches lighting loads of every kind to a programmed schedule, from its embedded controller or from PC software, locally or remotely. It needs no changes to existing wiring or light fittings.
| Rating | Up to 400 kVA |
|---|---|
| Controller | Embedded microcontroller |
| Display | 20 × 4 backlit LCD with time, date and current preset level |
| Output levels | Four voltage settings |
| Scheduling | Daily, monthly and yearly calendar with holiday scheduler |
| Start-up | Automatic start and shutdown, 0–30 minute ignition cycle |
| Metering | Three-phase power and energy parameters |
| Interface | RS-232, Ethernet, PC software for local or remote access |
| Savings | Up to 40%: preset voltage levels 30–40%, stabilized voltage 5–6%, plus longer lamp life and lower maintenance |
A servo stabilizer holds output voltage steady when the supply drifts. An ultra isolation transformer blocks spikes, line noise and ground loops but does not correct voltage. Powercon does both in one cabinet.
1 to 25 kVA single-phase and up to 2,500 kVA three-phase, air- or oil-cooled, with ±1% regulation (±0.5% on request).
When the load is mostly drives, UPS or IT equipment. Their harmonic currents overheat standard transformers. NEEL K-rated units run at full rating up to 750 kVA; K-13 suits most sites, and the K-factor is chosen from your measured spectrum.
Welding, cranes and induction heating change reactive demand within cycles, faster than contactors can switch. NEEL RTPFC switches capacitors with SCRs at zero crossing, from 100 to 2,000 kVAR at 380 to 690 V.
From measurement. ELSPEC, Dranetz BMI, Fluke and Tektronix analysers record your supply for several days, and the equipment is rated to the measured load.
Yes. NEEL equipment is installed across India and in 16 export countries.
Every NEEL product family in one PDF, with ratings and technical specifications. Leave your details to download it.
We measure your supply and find the cause before anything is specified.
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