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DJS-1G trip circuit monitoring relay
DJS-1, DJS-1G trip circuit monitoring relay DJS-1 trip circuit monitoring relay DJS-1G trip circuit monitoring relay I. Use DJS-1 trip circuit monitoring relay can continuously monitor the trip circuit in the short circuiter. An alarm is generated for the following conditions. a) DC power supply disappears; b) Trip coil and its leads fail; c) Circuit breaker auxiliary contact fault; d) Monitor relay fault itself. Second, the relay model and naming meaning DJS-1 trip circuit monitoring relay naming and meaning Third, the working principle The relay consists of an electromagnetic auxiliary relay and an RC loop that provides a return delay. A light-emitting diode is connected in series in the relay coil circuit, and when the trip circuit is intact, the light-emitting diode is bright (the auxiliary relay is in an operating state). When the circuit breaker is in the "closed" state (refer to Figure 1), there is current flowing through the LED, auxiliary relay coil, and auxiliary contact of the circuit breaker to the trip coil. Once the circuit is open or the DC power supply disappears, the auxiliary relay passes through a section. Return after a delay and give an alarm signal through its contacts. If the protection relay trips, its trip contact shorts the DJS-1 relay, and the breaker opens after a certain period of time (circuit breaker trip time). Its auxiliary contact is also switched, the protection relay trip contact is also returned and disconnected, and the relay is restored by another auxiliary contact of the circuit breaker. The auxiliary relay in the relay is in the following state during the following time: (1) The protection relay trip contact is closed to the circuit breaker trip. (2) The circuit breaker composite group contact yellow diamond is switched to the protection relay contact to open. This is achieved by the RC circuit, which causes the auxiliary relay to return after a delay. If the breaker fails, the protection relay trip contact remains closed for longer than the relay delay time, so the DJS-1 will give an alarm signal. DJS-1 trip circuit monitoring relay working principle Fourth, technical data rated voltage: 220V, 110VDC. Contact form and capacity: with two switching contacts and one moving contact; G-rail housing provides two switching contacts. The contact breaking capacity is DC220V, 0.1A (pf=0.4, L/R= 5ms); AC220V, 3A. 4.3 Delay time ≥ 0.3s. DJS-1 trip circuit monitoring relay technical parameters medium strength relay each lead circuit between the exposed non-charged metal part and the outer casing, the input circuit between the contacts should be able to withstand 2kV (effective value), 50Hz AC test voltage, The test lasts for 1 minute, and no insulation breakdown and flashover working conditions are used. The medium is not allowed to be explosive. The surrounding medium does not contain corrosive metal and gas and conductive medium that damages the insulation. It is not allowed to be filled with water vapor and has serious damage. Mold exists; b) Strong vibration and impact are not allowed in the place of use; c) The place of use should have facilities to prevent rain, snow and sand; d) The external magnetic induction intensity of 1.5mT is not allowed to be used. V. Outline and installation dimensions DJS-1 trip circuit monitoring relay installation size DJS-1 trip circuit monitoring relay DJS-1G trip circuit monitoring relay http://news.chinawj.com.cn ![DJS-1G trip circuit monitoring relay]()