1 Purpose
The DCH-1A type primary reclosing device (hereinafter referred to as the device) is used as a main component in the wiring of three-phase primary reclosing on transmission lines.

Meaning of Model 2


3 Principles and Structure
3.1 The device consists of a DS-32C type time relay (as a time element), a DZK-226 type fast intermediate relay (as an intermediate element), and several resistor and capacitor elements.
3.2 The device adopts an embedded plug-in structure, and the same core can be used for general embedded A32K, as shown in Figure 2. The relay is directly installed on the metal base plate in the plug-in, and the resistor and capacitor are first fixed on the insulation mounting plate, and then the mounting plate is fixed on the metal base plate in the plug-in. The plugin is installed inside a metal casing with a transparent plastic cover. Adopting an embedded plug-in structure is not only aesthetically pleasing, but also beneficial for users to adjust and maintain.
3.3 Terminal diagram and internal wiring diagram of the device, as shown in Figure 1.

Figure 1 Internal wiring diagram of DCH-1A primary reclosing device (back view)



Figure 2: Outline and Installation Dimensions of DCH-1A Type Primary Recloser Device

4 Main technical data
4.1 Rated voltage: DC 110V, 220V.
4.2 Rated current (holding current of intermediate component ZJ): 0.25A, 0.5A, lA, 2.5A.
4.3 The insulation strength of the relay should withstand a withstand voltage test of AC 50Hz, 2kY for 1 minute without breakdown or flashover.

5 Ordering Instructions
5.1 Model and name of the device.
5.2 Rated voltage and rated current.
5.3 Quantity of devices.