Jiangsu Du'an Environmental Protection LB-05 Leak Protection DeviceSummary:
The submersible pump water leakage protection relay, also known as a miniature comprehensive protector, is specifically designed to detect the water-sensitive resistance and motor temperature signal within the submersible pump.Sensor uses electrode sensors. When there is a leakage in the pump body or an abnormal temperature, the control relay will send the corresponding control signals so that staff can handle the pump leakage. The controller employs a series of anti-interference measures in the circuit design, ensuring reliable operation in environments with severe electromagnetic interference.
Feature:
Relays are used to detect the resistance and temperature signal of water sensitivity inside the submersible pump.Upon detecting that the water sensitivity resistance within the submersible pump is below the specified value, the relay activates. After the power is disconnected to check and clear the fault, and then reconnected, the relay resumes operation. An alarm is triggered and the relay operates when a temperature signal is detected as an open circuit or when the resistance is extremely high.
No Chinese content provided.The fault signal output is a normally closed signal (note: the standard configuration is normally closed; normally open signals require customization). When the power is disconnected or an input signal fault occurs, the normally closed signal becomes a normally open signal.
The system can display alarm types separately., and can manually reset faults.
Water-sensitivity resistor according to standard settingsCustomers with special requirements are welcome to contact us in advance.
LB-05 Leak ProtectionSimple circuitryCompact, lightweight, low power consumption, high stability, and equipped with an easy-to-maintain tube insertion structure.
Duwan Environmental ProtectionLB-05Type Controller8 terminals, with each terminal description as follows:
Controller Power Supply:
1: Power L; 2: Power N.
Pump Body Leakage Signal Input:
3: Leak Signal Input; 4: Signal Common Terminal.
5 NC: Unused.
Leakage fault outputRelay Signal Output:
6: Public End; 7: Normally Open End; 8: Normally Closed End.
Leak(No signal when not connected; signal is normal)
During a leak incidentTerminal 6 and 8 disconnected; terminal 6 and 7 connected.
When the leak is without fault6,8 terminals connected; 6,7 terminals disconnected.
3. Controller Application Diagram
Jiangsu Du'an Environmental Protection LB-05The Type Leak Overheat Protective Device achieves detection and fault output for oil chamber leakage, motor cavity leakage, wiring box leakage, and winding overheating; it features three groups of leak detection signals with hysteresis characteristics.
Power Supply:AC220V, 50Hz, Input Power: 5W.
Application Environment: Temperature-20°C to +50°C, relative humidity ≤ 85% RH.
Relay Contact Rating: 5A 250VAC
Signal Input
COM and R1 are the input ends for the oil chamber leakage.
COM and R2 are the input terminals for motor cavity leakage.
COM and R3 are for the input terminals of the junction box leakage.
COM and K1 are the input terminals for the motor winding overheating.
Fault output
J1 is a fault output, disconnected when no fault, closed when a fault occurs; a switch quantity.
J2 serves as a fault output, closing when there is no fault and opening when there is a fault, a switch quantity.
Fault Detection
When the oil chamber leaks and the probe detects a resistance value of 20K, the fault disappears, and the protector returns to its initial state (i.e., hysteresis characteristic). There is a delay of 1s to 5s, with the shorter delay time corresponding to a lower input resistance, and vice versa.
When the motor cavity leaks, the probe detects a resistance value.At 35K, the fault disappears, and the protector returns to its initial state (i.e., hysteresis characteristic). The input has a delay of 1s to 5s, with shorter delay times at lower input resistance and longer delays at higher resistance.
When the leakage probe detects a resistance value of 35K in the junction box, the fault disappears, and the protector returns to its initial state (i.e., hysteresis characteristic). There is a delay of 1s to 5s, with the shorter delay time corresponding to a smaller input resistance and vice versa.
When the winding overheating probe detects a temperature exceeding the set limit (determined by the user-selected overheating probe) and trips, the corresponding indicator light illuminates and the fault output relay activates. When the temperature returns to below the set limit and closes, the fault is cleared.LeakageThe protector has been restored to its original state. Input is available.1s to 2s latency.
Jiangsu Du'an Environmental ProtectionLB-05Type leakage overheat protector, realizing oil chamber leakage, motor cavity leakage, junction box leakage, and winding overheating detection with fault output; and can achieve dual-channelPT100 temperature collection and display, alarm temperature setting fault output, and other functions.
