The NNT4-4/3875P three phase voltage regulator is applied in the heating industry like the industrial furnace, glass furnace, oven, petrochemical industry and shoe machinery.

Output quantity	Output waveform
Control mode	10%output	50%output	90%output
Phase control

Phase control:
Continuous intersection control, stable output, ampere meter dose not jitter, but each cycle the half-wave will generate harmonic wave.

Applicable load:
Three-phase half control, constant impedance load, far infrared, tubular IR lamp and silicon carbide rod.

• The three phase voltage regulator has many kinds of control input signal(4~20MA/0~5V/0~10V/1~5V/2~10V,etc.), and user can choose it according to his demand.
• The voltage regulator has the modes of manual adjustment of internal and external power outputs + automatic adjustment.
• The three phase voltage regulator has the fuse open circuit indicator light/load short circuit,open circuit indicator light(optional)/SCR high temperature(75℃) indicator light and abnormity alarm connector.
• The device displays the percentage 0~100% of load output power.
• The three phase voltage regulator has the load buffering heat time(about 15 seconds).
• If the SCR over the rated temperature or the fuse burn-out the device will stop output, and just after the troubleshooting the device will restart output.
• The three phase voltage regulator is equipped with fast fuse to prevent the SCR from damaging, and the fuse can be dismounted easily.
• The voltage regulator has the heat sink with high efficiency which conducts the heat fast and has good heat dissipation.
• The mains frequency has the automatic surveillance function, the parameter in the 50~60Hz are available and dose not need any switch.

1. Product model specification, 2. control function, 3. indicating sticker, 4. control signal terminal indicating sticker, 5. main power source, 6. load protection cover, 7. fuse, 8. axial flow fan and heat sink.)