Industrial, electrical and other areas of equipment connection can not be separated from connectors, rail terminals are the most widely used as connectors. Various types of rail terminals: UK universal voltage terminal, UL-URTK current terminal, JHY1 plate voltage terminal, UL-USLKG grounding terminal…… Among them, the UL-URTK current test terminal is the protagonist of this paper.
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Product Description
UL-URTK current test terminal is composed of screw, pressure wire frame, switch bridge, spacer, group partition and so on. Among them, the insulation material is nylon PA, material Flame retardant grade UL94-V0. Terminal can be connected to 0.5-10 mm2 rigid wire or 0.5-6 mm2 flexible wire; 57 A, rated current 400 V; rated voltage Applicable line gauge 20-8 AWG. With universal mounting feet, Can be installed on U or concave guide rail.
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Working principle
When the secondary circuit of the current transformer is in operation, it is necessary to connect the experimental instrument in series and can not open the circuit, so the current terminal is needed.
Sliding metal parts, through the terminal voltage wire frame can withstand the maximum working current, switch with a screwdriver to loosen screws, move the slider, so that the switch position is clear; its two ends are equipped with a test socket, With the corresponding test terminal can be connected to test, measuring current without interruption operation.
Using this terminal can be very convenient to achieve the current transformer secondary circuit of various test connections. It has an auxiliary Jack on both sides of the longitudinal break slider to realize fixed or detachable transverse bridge. Auxiliary Jack like protruding “dome “, its inner diameter is 4 mm, the test plug can be inserted directly into it. From the top down, the switch state is clear and easy to distinguish. Only two terminals are needed to realize a single-phase current transformer test circuit. That is to say, this kind of terminal terminal and space than through terminal.
Advantages: need less accessories, easy installation, clear and easy to distinguish switch circuit, simple operation.
Related link: how to distinguish between voltage terminal and current terminal?
1. wiring should pay attention to the wiring diagram of the table. The main difference between the two terminals is that the voltage terminal, also known as the ordinary terminal, can not disconnect itself, only by connecting the terminal; the high current terminal can usually disconnect itself for test.
2. digital codes used on electrical drawings are different, such as current terminals starting with 4, such as A411、A412,C411、C412, etc.; voltage terminals starting with 6, such as A630、B630, etc.
Post time: Mar-22-2021