This standard specifies the technical requirements, inspection, marking, packaging, transportation and storage of electronic control equipment with electronic devices for land drilling rigs (i.e., electric transmission systems for drilling rigs). This standard applies to electronic control equipment with electronic devices and related interface circuits, driller's electric control consoles, pumper's electric control consoles, foot-operated master controllers and complete sets of generator control equipment used in land drilling rigs. JB/T 7845-1995 Electronic control equipment with electronic devices for land drilling rigs JB/T7845-1995 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of ChinawwW.bzxz.Net
JB/T7845-1995
Electronic Control Equipment with Electronic Devices for Land Drilling Rigs, Issued on November 24, 1995
Ministry of Machinery Industry of the People's Republic of China
Implementation on June 1, 1996
Mechanical Industry Standard of the People's Republic of China
Electronic Control Equipment with Electronic Devices for Land Drilling Rigs 1 Subject Content and Scope of Application
JB/T7845-1995
This standard specifies the technical requirements, inspection, marking, packaging, transportation and storage of electronic control equipment with electronic devices for land drilling rigs (i.e., electric transmission systems of drilling rigs).
This standard applies to electronic control equipment with electronic devices and related interface circuits, driller's electric control console, pumper's electric control console, foot-operated master controller and complete generator control equipment used in land drilling rigs. Note: The "land" conditions referred to in this standard refer only to normal continental climate conditions and are not applicable to desert climate conditions. 2 Reference standards GB2423 GB2682 GB2820 Packaging, storage and transportation pictorial symbols Basic environmental test procedures for electrical and electronic products Colors of indicator lights and buttons in electrical complete sets General technical requirements for diesel generator sets Basic dimension series for panels, racks and cabinets GB3797 Electric control equipment Part 2 Electric control equipment equipped with electronic devices GB3836.1 General requirements for explosion-proof electrical equipment for explosive atmospheres GB3836.5 Explosion-proof electrical equipment for explosive atmospheres Positive pressure electrical equipment "P\" GB4208 Protection grade of enclosure (IP code) ||GB4588.1 Technical conditions for single-sided and double-sided printed boards without metallized holes GB4588.2 Technical conditions for single-sided and double-sided printed boards with metallized holes JB3752
3 Technical requirements
Method for compiling product models of electronic control equipment
Models and basic parameters
The model compilation of electronic control equipment equipped with electronic devices for land drilling rigs (hereinafter referred to as equipment) refers to JB3752, and its comprehensive method is as follows: Full product model
Approved by the Ministry of Machinery Industry on November 24, 1995
Additional code
Series design serial number
Variety number
Specification number
Series code to be collected
Category code
Implementation on June 1, 1996
For example:
Specification
3.2 Environmental conditions
SS60L1A
1.5km drilling rig
3.2.1 Ambient air temperature
JB/T7845—1995
Indicates generator control
Indicates the first design
Indicates land use
Indicates 6000m drilling rig, the rest as shown in Table 1 Indicates DC speed regulation (SU), P indicates variable speed regulation (PING), etc. Indicates electrical control equipment for petroleum (SHI) machinery
2km drilling rig
3.2km drilling rig
4.5km drilling rig
6km drilling rig
8km drilling rig| |tt||The ambient air temperature of indoor devices is: not higher than +40℃, and the average temperature within 24 hours is not higher than +35℃, and the minimum is not lower than -5℃. The ambient air temperature of outdoor devices is: not higher than +40℃, and the average temperature within 24 hours is not higher than +35℃. The minimum is not lower than -20℃
If there are higher requirements for the outdoor environmental extreme temperature in the use area, it can be solved by signing a special agreement between the user and the manufacturer. 3.2.2 Atmospheric conditions for outdoor devices
When the temperature is +25℃, the relative humidity can reach 100% for a short time. 3.2.3 Altitude
The altitude is not higher than 1000m. If it is installed and used in places above 1000m above sea level, an agreement must be signed between the manufacturer and the user for design and use.
3.2.4 Vibration
Allowable vibration conditions at the installation foundation: When the vibration frequency range is 10-150Hz, the maximum vibration acceleration should not exceed 5m/s2. 3.2.5 Installation inclination
For vertically installed equipment, the installation inclination shall not exceed 5%. 3.3 Transportation, storage, installation
The temperature during transportation and storage can be in the range of -25-55℃, and the temperature can reach +70℃ for a short time (not exceeding 24h). If it exceeds this range, the user and the manufacturer should sign a special agreement. Equipment that cannot work at these extreme temperatures should not suffer any irreversible damage, and should be able to work normally immediately under the specified conditions.
3.4 ​​Power grid quality
3.4.1 AC power grid quality
Sustained voltage fluctuations shall not exceed ±10%, and short-term fluctuations shall not exceed 15% to 10%; frequency fluctuations shall not exceed ±2%; the rate of change of frequency shall not exceed ±1% per second; b.
The negative sequence component of the multi-phase power supply shall not exceed 5% of the positive sequence component. c.
Note: Negative frequency fluctuations and positive voltage fluctuations cannot occur at the same time, and positive frequency fluctuations and negative voltage fluctuations cannot occur at the same time. 3.4.2 DC power supply quality
When the batteries in the cabinet are supplying power, their voltage fluctuation range shall be 2
±15% of the rated value (the product of the rated voltage value of a single battery and the number of series connections).
Power grid conditions of self-provided power stations
JB/T7845-1995
The voltage setting range of AC diesel generator sets (hereinafter referred to as units) at no-load is 95% to 105% of the rated voltage; the voltage and power adjustment rate, stabilization time, fluctuation rate, and recovery time of the units shall all comply with the provisions of Article 2.3.2 of GB2820. Units of the same model and specification shall be able to operate stably in parallel within the range of 20% to 100% of the total rated power, and can smoothly transfer the active power and reactive power of the load. The distribution difference of its active power and reactive power shall not exceed ±10%; d.
's provisions.
The line voltage waveform sinusoidal distortion rate and the allowable asymmetric load of the unit at no-load rated voltage shall be in accordance with the technical conditions of the matching generator. If the voltage fluctuation range has a wider deviation, it can be negotiated between the user and the manufacturer. 3.5 Electrical clearance and creepage distance
The electrical clearance and creepage distance between bare conductors of unequal potential in the equipment, and between live bare conductors and metal parts, components or grounded parts, components shall comply with the provisions of GB3797. 3.6 Phase sequence arrangement and busbar color
The phase sequence and polarity arrangement between the main circuit connectors shall be arranged in accordance with Table 2. Table 2
1-phase (L1)
2-phase (L2)
3-phase (L3)
Positive (+)
Negative (-)
Neutral
Vertically arranged connectors
The bottom
The color of the main circuit busbar category shall comply with the provisions of Table 3. 3.7 Dielectric strength
1-phase (L1)
2-phase (L2)
3-phase (L3)
Neutral line
Grounded neutral line
Positive pole (+)
Negative pole (-)
Neutral line
Horizontally arranged connectors
Observed from the front of the equipment
Rightmost
Connectors arranged front and back
Nearest
Color marking
Light blue
Yellow and green (each color is marked alternately with a width of 15~100mm) Brown
Light blue
The main circuit and the auxiliary circuit directly connected to the main circuit should be able to withstand the dielectric test voltage specified in Table 4. 3.7.1
Rated insulation voltage U
U≤60
60U≤300
300
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