Model Meaning
Implementation Standard
GB/T3836.1、GB/T3836.2、GB/T3836.3、GB/T3836.31、IEC60079-0、IEC60079-1、IEC60079-7、IEC60079-31
Technical Parameter
| Model Specifications | Contactor Rated Current (A) | Thermal Relay Setting Current Range (A) | Maximum Controlled Motor Power (KA) | Rated Voltage (V) | Explosion-Proof Marking | Protection Rating | Corrosion Resistance Rating | Inlet Thread | Cable Outer Diameter |
|---|---|---|---|---|---|---|---|---|---|
| BQC-9 | 9 | 7~10 | 4 | 380 | Ex db eb IIB T6 Gb, Ex tb IIC T80°C Db Ex db eb IIC T6 Gb, Ex tb IIC T80°C Db | IP66 | WF1 WF2* | G3/4" | Φ10~Φ14mm |
| BQC-12 | 12 | 9~13 | 5.5 | ||||||
| BQC-18 | 18 | 12~18 | 7..5 | ||||||
| BQC-25 | 25 | 15~32 | 11 | G1" | Φ12~Φ17mm | ||||
| BQC-32 | 32 | 30~40 | 15 | G1 1/4" | Φ15~Φ23mm | ||||
| BQC-40 | 40 | 37~50 | 18.5 | ||||||
| BQC-50 | 50 | 48~55 | 22 | Ex db eb IIB T4Gb, Ex tb IIC T80°C Db Ex db eb IIC T4 Gb, Ex tb IIC T80°C Db | G1 1/2" | Φ18~Φ33mm | |||
| BQC-65 | 65 | 63~80 | 30 | ||||||
| BQC-85 | 85 | 80~100 | 37 | G2" | Φ26~Φ43mm | ||||
| BQC-100 | 100 | 80~160 | 45 |
Electrical Schematic Diagram
Product Features
1. Aluminum alloy die-cast housing undergoes high-speed shot blasting followed by high-pressure electrostatic powder coating for corrosion resistance and aging resistance;
2. Stainless steel exposed fasteners provide superior corrosion resistance;
3. Internally equipped with AC contactor, thermal relay, and self-resetting universal changeover switch; includes high-breaking miniature circuit breaker when fitted with main switch;
4. Enables direct start/stop control of 50Hz, 380V three-phase asynchronous motors, with overload, phase loss, and undervoltage protection;
5. Supports remote control capability;
6. Compatible with both steel conduit and cable wiring.
Applicable Scope
1. Suitable for Zone 1 and Zone 2 locations in explosive gas environments;
2. Suitable for Class IIA, IIB, and IIC explosive gas environments;
3. Suitable for Zone 21 and Zone 22 locations in explosive dust environments;
4. Suitable for Class IIIA, IIIB, and IIC explosive dust environments;
5. Suitable for temperature classes T1 to T6;
6. Suitable for infrequent starting and stopping of three-phase asynchronous motors in hazardous environments such as petroleum extraction, refining, chemical processing, military applications, offshore oil platforms, oil tankers, and metal processing.
