Changsha Longwell Electric Supply 
 BWD-3K330B dry-type transformers temperature controller 
 BWD-3K330B intelligent temperature dry-type transformers 
 BWD-3K330B dry-type transformers temperature control box 

 Product Overview 
 BWD-3K330B dry-type transformers intelligent temperature control to advanced single-chip core, high-performance temperature sensors, high-resolution analog-digital conversion chip, combined with advanced data storage technology designed, is to ensure the safe operation of dry-type transformers control device. With power-down data protection and records three-pack transformer winding when power-down function of temperature (below 80 ℃ not refresh the original record) give port control output register assignment using output and the output port after the real-time monitoring of programming, so control output is more reliable and stable. High-quality components to ensure equipment against electromagnetic interference. The instrument of high precision, small error and anti-jamming ability, long life, especially for the high humidity and other harsh environments. 
 1, using the conditions (environment) 
 Operating voltage: AC170V ~ AC170V `AC250V (48 ~ 60Hz) 
 Ambient temperature: -10 ℃ ~ +55 ℃ 
 Relative humidity: 5 ~ 95% 
 Atmospheric pressure: 60 ~ 106KPa 
 2. Measuring range -40 ℃ ~ 200 ℃ 
 3 Resolution 0.1 ℃ 
 4 Accuracy ± 1 ℃ 
 5 control accuracy ± 1 ℃ 
 6 Power <8VA (supply voltage 220V ± 10%, 50Hz ± 10%) 
 7. Pt100 sensor parameters 
 8 anti-jamming performance standards in line with JB/T7631-2005 
 9. AC220/14A relay contact capacity of a group of fan relay 
 A control relay AC220/10A 
 10. Buzzer Model: 2319-based or integrated heat-type buzzer 
 11. Instrument Type Dimensions Dimensions 330B/300C/D 
 Dimensions: 320 × 260 × 65mm 

 12 fuse: fuse circuit warm modern: 1A/250VAC fan fuse: 5A/250VAC 
 13.3KD Series: Three independent 4mA ~ 20mA current output 
 14.3KC Series: RS485/232 computer interface 
 15 by the standard: JB/T7631-2005 "transformers electronic thermostat" 
 GB/T17626-1998 "EMC test and measurement technology."