BWD series dry type transformer temperature controllers
Summary&application
BWD series dry type transformer temperature controllers use 3-4pcs Pt-resistances as the sensor, can measure three phase winding and core temperature of the dry type transformer, to realize temperature monitoring and control. It can far-transmit the measured data by adding RS485(or RS232) communication interface or analog quantity transmitting output interface. The meter conforms to the standard JB/T7631-2005《electronic temperature controllers used for the transformers》.
1. Main functions and characteristics:
◆Modular structure design for current, etc. with SMT production process.
◆Digital calibration, easy installation, high cost performance.
◆LED display, button settings and easy operation.
◆It is characterized with perfect self-checking and protection function.
2. Model composition and representative meanings:
3.Model specification and selection description:
(Unit: mm)
| Model | Temperature measuring point | R | DOutput voltage | L | M Door interlock trip | J 2-way alarm | F | External size | Display mode |
BWD-3KS | 3 |
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| 160×80 | LED display |
BWD-3KRS | 3 | ● |
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BWD-3KLS | 3 |
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| ● |
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BWD-3KDS | 3 |
| ● |
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BWD-3KMS | 3 |
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| ● |
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BWD-3KJS | 3 |
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| ● |
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BWD-3KFS | 3 |
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BWD-3KRLS | 3 | ● |
| ● |
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BWD-3KRDS | 3 | ● | ● |
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BWD-3KRMS | 3 | ● |
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| ● |
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BWD-3KDMS | 3 |
| ● |
| ● |
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BWD-3KLMS | 3 |
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| ● | ● |
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BWD-3KRJS | 3 | ● |
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| ● |
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BWD-4KS | 4 |
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BWD-4KRS | 4 | ● |
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BWD-4KLS | 4 |
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| ● |
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BWD-4KDS | 4 |
| ● |
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BWD-4KMS | 4 |
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| ● |
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BWD-4KJS | 4 |
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| ● |
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BWD-4KFS | 4 |
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BWD-4KRLS | 4 | ● |
| ● |
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BWD-4KRDS | 4 | ● | ● |
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BWD-4KRMS | 4 | ● |
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| ● |
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BWD-4KDMS | 4 |
| ● |
| ● |
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BWD-4KLMS | 4 |
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| ● | ● |
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BWD-4KRJS | 4 | ● |
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| ● |
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Note:
indicates the intrinsic functions of the instrument
4. Main technical performance and parameters:
| Item | Type index |
Accuracy | Class 0.5 |
Display mode | LED display, display A,B,C three phase temperature in turn in 4s interval or fixed-point display the max. temperature of each phase, the resolution is 0.1℃ |
Measuring range | (-50~200) ℃ |
Output mode | Over temperature alarm output; |
Starting fan | Control 4~6pcs fans, relay contact total capacity: AC 250V/20A. |
Analog quantity output | Output 3-way 4~20mA(or 0~5V) signals, respectively corresponding A,B,C phase temperature 0~200℃ or output 1-way 4~20mA(or 0~5V) signal, corresponding three phase temperature max. value 0~200℃. |
Communication | RS485 or RS232 serial communication interface, adopt Modbus-RTU communication protocol. |
Work power supply | AC220V±10%, 50Hz/60Hz, consumption<5VA |
5. External and installation size:
(Unit: mm)
| Model | Panel size | Shell size | Cutting size |
BWD-S series | 160×80 | 150×74.5×135 | 153×77 |