This standard specifies the basic parameters, technical requirements, test methods and inspection rules of the flameproof coal drill transformer complex for mines (hereinafter referred to as the device). This standard applies to the design, manufacture and inspection of the device. JB/T 6312-1992 Flameproof coal drill transformer complex for mines JB/T6312-1992 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Subject Content and Scope of Application of Flameproof Coal Drill Transformer Integrated Device for Mining
JB6312—92
This standard specifies the basic parameters, technical requirements, test methods and inspection rules of the flameproof coal drill transformer integrated device for mining (hereinafter referred to as the device).
This standard applies to the design, manufacture and inspection of the device. 2 Reference standards
GB3836.1 Explosion-proof electrical equipment for explosive atmospheres, general requirements
GB3836.2 Explosion-proof electrical equipment for explosive atmospheres Flameproof electrical equipment "d"
Explosion-proof electrical equipment for explosive atmospheres Increased safety electrical equipment "e" GB 3836.3
Intrinsically safe circuits and electrical equipment "i" GB3836.4 Explosion-proof electrical equipment for explosive atmospheres Rubber-sheathed cable entry devices for explosion-proof electrical appliances
JB4262
JB4002 Wiring terminals for flameproof low-voltage electrical appliances for mining GB1497
GB 998wwW.bzxz.Net
JB3955
Basic standards for low-voltage electrical appliances
Basic test methods for low-voltage electrical appliances
Mining transformers
Test methods for power transformers
Tropical low-voltage electrical appliances
GB 2424.7
Basic environmental test procedures for electric and electronic products Guide for vibration (sinusoidal) test GB2423.10 Basic environmental test procedures for electric and electronic products Test Fc: Vibration (sinusoidal) test method GB 2423. 4
Basic environmental test procedures for electric and electronic products Test Db: Alternating damp heat test method 3 Terms and terms
General terms and terms
General terms and terms should comply with the provisions of standards such as GB2900.1, GB2900.18 and GB2900.35. 3.2 Terms and terms specified in this standard,
3.2.1 Pilot circuit
In order to achieve remote control of coal drill, the starting circuit is composed of the core wire of the coal drill power supply cable, the coal drill handle switch, the drill winding and the signal source.
3.2.2 Leakage lockout
When the power is off, the insulation of the load side cable of the coal drill to the ground is reduced to the specified value, and the device cannot supply power to the load. A kind of electrical protection.
3.2.3 Short circuit lockout
When the power is off, the interphase insulation of the load side cable of the coal drill is destroyed, and the device cannot supply power to the load. 3.2.4 Breaking time
Approved by the Ministry of Machinery and Electronics Industry on June 26, 1992 444
Implemented on January 1, 1993
JB 6312-92
The total time from the occurrence of an electrical fault in the power supply cable to the termination of power supply by the device when the coal drill is in operation. 4 Product classification and basic parameters
4.1 Product classification
4.1.1 Classification by transformer capacity
The rated capacity of the transformer is 2.5kVA, and the power of the controlled electric drill is 1.2kW; the rated capacity of the transformer is 4.0kVA, and the power of the controlled electric drill is 2×1.2kW. 4.1.2 Classification by main circuit control element
The device that uses an AC contactor to break the main circuit; the fast power-off device that uses a thyristor element to break the main circuit. b.
4.2 Basic parameters
4.2.1 The basic parameters of the device shall comply with the provisions of Table 1 Table 1
Main transformer
Rated capacity
Rated voltage
666--380/133
1140—666/133
1140-660/2×133
Controlled electric drill
Control and
Single-phase leakage closing
Single-phase leakage closing
Fixed resistance
Note: 1) The denominator is the breaking time of the fast power-off device. Lock resistance
Single-phase 1ka
Short circuit (carrier frequency)
Effective protection
Resistance grounding device
Breaking time
0. 25/0. 011)
distance (using
cable)
The voltage combination vector diagram and connection group number of the main transformer of the device shall comply with the provisions of Table 2. 4.2.2
Rated capacity
Rated voltage
660--380
1140-660
Note: △
2×133
Vector diagram
4.2.3 The rated performance parameters of the main transformer in the device shall comply with the provisions of Table 3. Table 3
Impedance voltage, %
No-load loss, W
Load loss, W
No-load current, %
△(man)
Phase-to-phase short-circuit device
Breaking time
0.10/0.005
Current value
Connection group number
Y·dll-D?do
YY--Y.11
4.2.4 Rated frequency of power supply: 50Hz;
4.2.5 The device is for long-term working system.
5 Technical requirements
JB6312-92
5.1 The device shall comply with the requirements of this standard and be manufactured according to the drawings and documents approved by the prescribed procedures. 5.2 The device shall comply with the relevant provisions of GB3836.1~3836.4, GB1497 and other standards. After the explosion-proof performance test, the "explosion-proof certificate" issued by the inspection unit shall be obtained.
5.3 Normal use conditions of the device
Altitude not exceeding 1000m;
Ambient temperature -5~40℃; Maximum annual average temperature 20℃; Relative air humidity not exceeding 95% (at 25℃); In a mine with explosive gas (methane) mixture; In a place without significant shaking and impact vibration; The installation inclination with the vertical plane does not exceed 15°, in an environment without gas and vapor that damages metal and insulation; In a place without dripping water and other liquids; Installation category; Direct pollution level: Level 8. 5.4 The components of the device (relays, electronic devices, etc.) must comply with the provisions of their respective product standards or technical conditions. 5.5 The dielectric properties of the device must be able to withstand the AC 50Hz power frequency withstand voltage test for 1 minute without breakdown and flashover. 5.5.1 For the main circuit and the control circuit and auxiliary circuit specified to be connected to the main circuit, the power frequency withstand voltage test voltage value shall comply with the provisions of Table 4.
Rated insulation voltage of the main circuit, U
U≤60
60
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