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Top Loading Oil Controller, Overfill Detection Controller Vavle, Overfill Detection System

1   System introduction

 ET - SLC-T overfill detection-top  loading and grounding controller is designed for  top loading oil system , can effectively prevent liquid overflow and ensure the  grounding resistance conforms to the safety standards of instrumentation, system for oil storage and transportation of chemical products.

Ex-mark is Exd[ia]IIBT4.

2  The system working principle and composition

2.1 working principle 

ET - SLC-T overfill detection-top  loading and grounding controller is designed for the top loading oil  system .  when the liquid level exceeds alarm position or ground loop in excess of the prescribed value, the system output sound and light alarm signal for field personnel understand the system working status in time, at the same time the output relay switch control signal.

2.2 The system composition and function

ET - SLC -T overfill detection-top  loading and grounding controller is mainly composed of the main controller, ET- AL sound and light alarm,  ET - OP - T overfill sensor, ET - SC - T clamp, ET - RP  return plate, ground wire .

3    the product characteristics

1. The system uses digital circuit design, stable performance, strong anti-interference ability; 2. The overfill sensor using optical principle, the overall epoxy resin casting, anti-corrosion,

waterproof;

3. The overfill sensor has fault alarm function;

4.Provide sound and light alarm signal, in a timely manner to understand system working state;

5.Switch signal output interface capacity 10A, 30 VDC or 10 A, 250 VAC.

4   System parameters

1. Working voltage: 220 VAC ± 10%

2. The working current: < 20 mA

3. The working temperature: - 40 ℃ ~ 60 ℃

4. Response time: < 0.5 s

5. Grounding resistance: < 55 Ω

6. Protection grade: Ip65

7. Ex-mark : Exd[ia] IIBT4

8. Warning: sound and light alarm

9. The output signal: relay output, normally open normally closed is optional Interface capacity 10A, 30 VDC or 10A, 250 VAC

5  System installation

5.1 Electrical installation

5.1.1 circuit board 
appendix 1: ET -SLC-T  controller circuit board schematic.

1.The technical requirements

A. 1 ~ 6terminals for the relay output signal, pay attention to the normally open normally closed choice;

B. 7 ~ 8 terminals for power input, the squared cable > 2 x 1 mm, outside diameter between Φ 8 mm ~ Φ12 mm ;

C. 9 terminal for grounding side, connected to the controller shell, ensure reliable grounding; D. 10 ~ 13terminals by sound and light alarm, using squared cable > 4 x 0.5 mm, outside

diameter betweenΦ 8 mm ~ Φ12 mm.

2.Terminal instructions

A. 1 ~ 3 terminal for the signal output terminal  of grounding;

B. 4 ~ 6 terminal for the signal output terminal  of overfill;

C: 10 ~ 13 terminals for sound and light alarm;

D. 14 ~ 22 terminals for overfill sensor, clamp, grounding line, return plate.5.1.2 The electrical connection diagram

appendix 2: ET - SLC-T controller electrical connection diagram.

5.2 Machinery installation

appendix 3: ET - SLC-T  controller installation diagram.

appendix 4: main controller installation size chart.

appendix 5: ET - RP ruturn  plate installation size chart.