NNT4-4/3875P Three Phase Voltage Regulator Manufacturer

NNT4-4/3875P Three Phase Voltage Regulator

: http://electrical-relay.com/2018/3-2-8-3875p-three-phase-voltage-regulator.html

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.

Model explanation

Parameters of NNT4-4/3875P three phase voltage regulator

Applicable voltage	11type:Three phase voltage AC85~120V---50/60Hz
Applicable voltage	38type:Three phase voltage AC200~480V---50/60Hz
Load current	25A/40A/75A/100A/125A/150A/200A/250A/300A/400A/500A
Auxiliary power supply	PCB board working power supply:AC220V±10% 50/60Hz,Control terminal L/N has no zero wire zone and live wire zone. Three -phase four-wire connect the zero wire N synchronously.If the PCB connect with main control power supply, the device dose not need the auxiliary power supply.
Phase-shifting angle	The central point of 0~150°delta-connected load or star-connected load (HHT4-4) dose not connect the wire.
Phase-shifting angle	The central point of 0~175°star-connected load (HHT-4-5) connects the wire.
Over temperature alarm	The device will alarm when its temperature over 75℃.
Input signal	4~20Ma,0~10V signal
Service environment	Temperature-10~55℃ Humidity below 90%RH
Withstand voltage strength	AC2000V/1 minute(Among the heat sinks of the power supply)
Insulation resistance	Above 20M Ω/500V(Among the heat sinks of the power supply)

Output waveform diagram

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.

Features

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.)

Exterior and installation size

Current A	Exterior dimension			Fixed dimension			Screw	Cooling method
Current A	Length L	Width W	Height H	D1	D2	W1	Screw
25	150	130	164	80	0	116	M5,M6	Natural cooling
40	150	130	164	80	0	116	M5,M6	Forced cooling
75	218	130	168	112	0	116	M5,M6
100	218	130	168	112	0	116	M5,M6
125	285	148	210	170	0	137	M8
150	285	148	210	170	0	137	M8
200	285	148	210	170	0	137	M8
250	335	275	240	112	112	265	M8,M10
300	335	275	240	112	112	265	M8,M10
※Above 400A is the customized product.

Index
electric regulator, voltage stabilizer, electrical device