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LD-BK10(Q) series temperature controller of dry transformer (referred to as temperature controller) is an intelligent controller designed especially for safe operation of dry transformer. The temperature controller features adoption of single chip computer technology and utilization of the platinum thermo-resistors embedded in the winding of the dry transformer for detection and display of temperature rise of the transformer windings. It can start or stop the cooling fan automatically for forced air cooling of windings and control over-temperature alarm and over-temperature tripping output so that the transformer will be operated safely. Functional features Temperature monitoring of dry-type transformer: three-phase circuit measurements and display; the maximum display; input open circuit and failure self-inspection display and output; cooling fan manual/automatic start-stop display and output; over-temperature alarms, over-temperature trip display and output.
Type selection (arbitrary combination of E、F、G/I、L、C)
02The Technical Specification
|
Ambient temperature(℃) |
Relative humidity(％ RH) |
Measurement range(℃) |
Sensor type |
-25～55 |
< 95 (25℃) |
-30.0～240.0 |
Pt100(3-wire system) |
Power frequency(Hz) |
Power voltage(V) |
Power consumption of temperature controller (W) |
Resolution(℃) |
50/60(±2) |
AC220 (-15%，+10％) |
≤8 |
0.1 |
Contact capacity |
Accuracy grade |
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Fan：10A 250VAC(cosφ=0.4，signal phase) 9A 250VAC(cosφ=0.4，three-phase) Other：5A 250VAC/5A 30VDC(resistive) |
Grade1(Grade 0.5 for Temperature controller Grade B for sensor) |
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Conforming to the relevant standards | |||
JB/T7631-2016：Electronic Thermo-controllers for Transformers
ISO9001:2015：Quality Management Systems-requirements
Temperature-controlled form factor ：400x320x120mm (height x width x depth） Embedded size : 372x302mm(height x width)
Fixing hole size : 385x160(height x width) Depth of embedding : 90mm
Fixed hole size : φ4.5
Terminal 1&2：Temperature controller power supply AC220V Terminal 3~6：Single-phase fan output（Active contact） Terminal 11&12：Fan state output（Passive contact） Terminal 13&14、41&42：Over-temp alarm I&II（Passive） Terminal 15&16、43&44：Over-temp trip I&II（Passive）
Terminal 17&18：Fault alarm control output（Passive contact） Terminal 51&52：Fan fault alarm control output (Passive) Terminal 53&54：RS485 communications output.
Terminal 61~66：4~20mA current output.
Schematic diagram of controller
Ambient temperature: -25℃～+55℃; Relative humidity: < 95％(25℃);
Power frequency: 50Hz or 60Hz(±2Hz);
Power voltage: AC220V(+10%, -15%);
AC380V(+10%, -15%);
(If there is no special indication when ordering, AC220V shall prevail)
-30.0℃～240.0℃
Grade of accuracy: Grade 1(Grade 0.5 for temperature controller, Grade B for sensor);
Resolution: 0.1℃
≤8W
Capacity of contact of fan: 6A/250VAC (cosΦ=0.4);
Capacity of control output: 5A/250VAC (Resistance); 5A/30VDC
JB/T7631-2016 Electronic Thermo-controllers for Transformers ISO9001:2015 Quality Management Systems-requirements
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