The ZJ3-B series fast intermediate relay is used for secondary circuit relay protection and automatic control circuit in power systems. It has a transparent casing, allowing clear observation of the internal structure. The relay has different models and ratings, and can be connected according to the application. The operating voltage is 50%-70% of the rated voltage, and the operating time is not more than 8ms.
The ZJ3-B series quick in‑between relay is intended for secondary protection and automatic control circuits in power systems, increasing the number and capacity of contacts. The manual describes its purpose, structure, and wiring details, including the internal layout shown in the wiring diagram.
Technical requirements such as rated voltage, action voltage, holding current, return voltage, and action time are listed, along with installation and debugging procedures. Installation guidelines cover mounting orientation, series resistors for the voltage coil, contact pressure limits, and adjustment methods for voltage and timing. This manual is written in Chinese.
| Rated voltage (ZJ3-1B) | 220 V |
|---|---|
| Rated voltage (ZJ3-2B) | 110 V |
The ZJ3-1B relay is rated for 220 V.
Adjustment is mainly done by changing the contact pressure, travel, and the gap between contacts to balance with the action voltage.