main feature:
VH3B series microcontroller technology is the application of intelligent three-phase phase-shift trigger and cycle through the dual zero trigger, powerful and high reliability, and can adapt to a variety of resistance and load carbon rods using step-down transformer silicon rods molybdenum, tungsten silk and other types of industrial furnaces, can also be used to control motor soft start, its main features include:
20mA (0-5V) / 4-20mA (1-5V) signal compatible input;
Computer technology linearized power correction, when the load is resistive, its output power is proportional to the input signal;
Including switching power supply, can be directly used 220VAC power supply, and the two groups have 5V and 24V DC power output.

Performance:
Voltage: Three-phase 380VAC single-phase 220VAC
Current: 50A, 75A, 100A, 125A, 150A, 175A, 225A, 250A, 300A, 400A, 500A, 600A, 800A
Power: 50HZ / 60HZ Automatic Identification
** Type: 4-20mA, DC1-5V, manual 10K potentiometer
** Anti-: 4-20mA (249Ω), DC1-5V (30KΩ), DC0-10V (12KΩ)
Environment: temperature: 45 ℃, Humidity: 90% RH or less
Load: Constant impedance electric wire, IR far infrared, UV lamp, transformer
Features: high-speed fuse, SCR overtemperature stop output
Function: LED display panel SCR working condition, and cause of the malfunction

Function selection:

Open the plates and shells, which can be seen inside a 6-bit DIP switch, you can select the following functions:
One for selecting the input signal specifications, OFF represents input 0-20mA or 0-5V (current or voltage input is jumper selection), ON indicates that the input signal is a 4- A or 1-5V. If the input signal is 0-10mA, 0-5V input should be selected, then the external 500 ohm resistor in parallel to achieve. Usually recommended as a 0-20mA input signal can achieve better anti-interference ability and resolution.
2 Select the three-phase three-wire / three-phase four-wire connection mode, AIJK3 must be placed in the OFF position, AIJK6 must be placed in the ON position, the factory is usually set up properly.
3 is used to select the phase shift / cycle zero trigger mode, OFF represents phase trigger, ON represents cycle zero trigger.
4 is used to select the alarm phase, OFF three-phase as long as there is any phase or phase thyristor breakdown on alarm, ON indicates there is nowhere to alarm two-phase, two-phase contact suitable for single phase applications, you can a set of output terminals do not trigger a series of 1 / 2W 500K resistor to 220VAC power supply, input signal virtual way to avoid the police.
5 is used to select IN2 function for the power feedback or adjust the soft start / soft stop time delay, OFF means for adjusting the soft start / soft stop time, you can adjust the external resistor in 1-41 seconds; when ON soft start / soft stop time fixed to 2 seconds, then IN2 as the power supply feedback to limit excessive current when the input power is greater than the range of 15%, will drive alarm alarm.
Article 6 Preparation for special functions, set to OFF.
There are two jumpers were selected main input (IN1) and IN2 current or voltage input

Phase trigger and cycle zero trigger distinction as follows: