DJS-1 series trip circuit monitoring relayDetailed product description：

Purpose of DJS-1 series trip circuit monitoring relay:

The DJS-1/T and DJS-1/Q type trip circuit monitoring relays can continuously monitor the trip circuit in the circuit breaker. And generate an alarm for the following situations.
a) The DC power supply has disappeared.
b) The tripping coil and its leads have malfunctioned.
c) Fault in auxiliary contact of circuit breaker.
d) Monitor the malfunction of the relay itself.


DJS-1 series trip circuit monitoring relay model name:




Working Principle:
This relay consists of an electromagnetic auxiliary relay and an RC circuit that provides return delay. Connect a light emitting diode in series in the relay coil circuit, and when the trip circuit is intact, the light emitting diode will be activated (the auxiliary relay is in operation).
When the circuit breaker is in the "closed" state (see Figure 1), current flows through the light-emitting diode, auxiliary relay coil, and circuit breaker auxiliary contacts to the trip coil. Once this circuit is open or the DC power supply disappears, the auxiliary relay returns after a delay and gives an alarm signal through its contacts.
If the protective relay trips, its tripping point will short-circuit the DJS-1 relay. After a certain period of time (circuit breaker tripping time), the circuit breaker will disconnect, and its auxiliary contacts will also switch. The tripping point of the protective relay will also return and disconnect, and this relay will restore power supply through another auxiliary contact of the circuit breaker.
The auxiliary relay in this relay is in an active state during the following times:
(1) The tripping contact of the protective relay is closed until the circuit breaker trips;
(2) The auxiliary contact of the circuit breaker is switched to the tripping contact of the protective relay and disconnected.
This is achieved through an RC circuit, which delays the return of the auxiliary relay. If the circuit breaker fails, the tripping contact of the protective relay will remain closed for a longer time than the relay delay time, so DJS-1 will give an alarm signal.



Main technical parameters of DJS-1 series trip circuit monitoring relay:

4.1 Rated voltage: 220V, 110VDC.
4.2 Contact form and capacity: It has two sets of conversion contacts and one set of dynamic breaking contacts; The contact breaking capacity is DC220V, 0.4, L/R=5ms; AC220V，3A。
4.3 Delay time ≥ 0.3s.
4.4 The external dimensions and opening dimensions of the DJS-1/T type relay are shown in Figure 3 of the general structural system.
The external dimensions and opening dimensions of DJS-1/Q type are shown in Figure 7 of the universal structural system.
4.5 Relay Rear Wiring Diagram (see Figure 2 and Figure 3) 3 Relay Model and Meaning Relay Structure, Q represents embedded plug-in structure, T represents protruding plug-in structure. Design Number Monitoring Electromagnetic Type 4 Technical Data
4.6 Dielectric Strength
Each conductive circuit of the relay should be able to withstand an AC test voltage of 2kV (effective value), 50Hz between exposed non charged metal parts and casings, between input circuit contacts, and between different circuits for 1 minute without insulation breakdown or flashover.
4.7 Working conditions
a) The usage location does not allow explosive media, and the surrounding media should not contain corrosive metals, gases that damage insulation, or conductive media. It is not allowed to be filled with water vapor or have serious mold presence;
b) Strong vibrations and impacts are not allowed in the usage location;
c) The usage location should have facilities to defend against rain, snow, wind, and sand;
d) The usage location does not allow an external magnetic induction intensity exceeding 1.5mT.
4.8 Electrical anti-interference relays shall comply with GB7261 and GB6261 "Electrical anti-interference test for emergency protection devices of static relays".

Wiring diagram behind the relay:



DJS-1 series trip circuit monitoring relay external dimensions and opening dimensions:

The external dimensions and opening dimensions of DJS-1/T type are shown in Figure 3 of the universal structural system.
The external dimensions and opening dimensions of DJS-1/Q type are shown in Figure 7 of the universal structural system.

Ordering instructions:
5.1 Product model, name, rated voltage level, structural form, etc. (refer to Articles 3 and 4.1).
5.2 Order Quantity.
5.3 Relay matching: such as base, etc.

DJS-1 series trip circuit monitoring relay（No image available）