SCR Phase-shift Triggers

I. Overview
The JKH-B3 phase-shift trigger module is based on the JKH-A3 but eliminates the external 220V/9V power transformer and is powered directly from 220VAC, making installation easier. It offers multiple control input specifications, optoelectronic isolation between input and output, and stable, reliable wide-pulse triggering. Without a synchronizing transformer, it can either be used together with various automation instruments or manually controlled via an external potentiometer, without interfering with the instruments. It is widely used in control systems where the load requires continuous smooth regulation, where high control accuracy is required, or where high inrush current is not permitted, such as speed control, voltage regulation and charging of AC/DC motors. Wiring is simple and the phase sequence need not be considered. Reliable overcurrent protection ensures that damage to the SCRs in the main circuit will not cause damage to the controller; even if the trigger wires are connected incorrectly, the controller will not be damaged within a short period.
The JKH-B3 phase-shift trigger module is encapsulated in epoxy resin, so there are no requirements on mounting position and it is suitable for harsh environments.
The JKH-B3 is suitable for star and delta connections in three-phase three-wire systems, and can also be used for three-phase or single-phase full-wave half-controlled rectification.

II. Main technical specifications
Input specifications: 1-5V (4-20mA), 10K potentiometer (for manual adjustment)
Output specifications: three-phase, three-channel trigger
Phase-shift range: 0-180
Trigger capacity: ≤800A unidirectional SCR antiparallel with a diode, or two antiparallel unidirectional SCRs
Power supply voltage: 85-264 VAC