JB 6314-1992 Mining flameproof leakage detection relay

This standard specifies the basic parameters, technical requirements, test methods and inspection rules of flameproof leakage detection relays for mines (hereinafter referred to as leakage detection relays). This standard applies to the design, manufacture and inspection of leakage detection relays. General leakage protection units and components for mines can also refer to this standard. JB 6314-1992 Flameproof leakage detection relays for mines JB6314-1992 Standard download decompression password: www.bzxz.net

1 Subject content and scope of application
Machinery Industry Standard of the People's Republic of China
Explosion-proof leakage detection relay for mines
JB 6314--92
This standard specifies the basic parameters, technical requirements, test methods and inspection rules of explosion-proof leakage detection relays for mines (hereinafter referred to as leakage detection relays).
This standard applies to the design, manufacture and inspection of leakage detection relays. General leakage protection units and components for mines can also refer to this standard. 2 Reference standards
GB 3836. 1
GB 3836. 4
JB4262
JB4002
GB1497
GB 2424. 7
GB2423.10
GB 2900.18www.bzxz.net
GB2900.35
3 Glossary
General requirements for explosion-proof electrical equipment for explosive atmospheres Explosion-proof electrical equipment for explosive atmospheres Flameproof electrical equipment "d" Explosion-proof electrical equipment for explosive atmospheres Increased safety electrical equipment "e" Explosion-proof electrical equipment for explosive atmospheres Intrinsically safe circuits and electrical equipment "i" Rubber-sheathed cable entry devices for explosion-proof electrical appliances
Terminal blocks for flameproof low-voltage electrical appliances for mining Basic standards for low-voltage electrical appliances
Basic test methods for low-voltage electrical appliances
Tropical low-voltage electrical appliances
Basic environmental test procedures for electrical and electronic products Test Db: Alternating damp heat test method Basic environmental test procedures for electrical and electronic products Guidelines for vibration (sinusoidal) test Basic environmental test procedures for electrical and electronic products Test Fc: Vibration (sinusoidal) test method Electrical terminology Basic terminology
Electrical terminology
Low-voltage electrical appliances
Electrical terminology Explosion-proof electrical equipment for explosive atmospheres 3.1—General terminology
General terminology should comply with the provisions of GB2900.1, GB2900.18, and GB2900.35. 3.2 Terms specified in this standard
3.2.1 Leakage trip
When the low-voltage switch is in operation with power on, the network insulation resistance drops to or below the set value, and the leakage detection relay is activated to trip the switch. 3.2.2 Leakage interlock|| tt||When the low-voltage switch is in the open state and the power is cut off, the insulation resistance of the load-side network drops to or below the set value, and the leakage detection relay detects the fault and locks the switch so that it cannot close and transmit power.
3.2.3 Artificial bypass grounding
When a person touches a live conductor of a phase, the bypass relay will operate to ground the faulty phase through a low impedance (resistance and capacitance). Approved by the Ministry of Machinery and Electronics Industry on June 26, 1992 and implemented on January 1, 1993
3.2.4 Compensation efficiency for network capacitance current JB6314-92
When there is no compensation measure for the leakage detection relay, the network insulation resistance is infinite, and the current I flowing through the 1k resistor to ground a single phase is equal to the same current flowing through the same phase as above in the best compensation state. The difference between the current I of a resistor and I, as a percentage, is called the compensation efficiency. I-I2
3.2.5 The action time of the leakage detection relay
When the power supply network is in power transmission operation, the total time from the single phase being grounded through a 1k resistor to the leakage protection execution relay action. 4 Product classification and basic parameters
4.1 Product classification
According to the protection function:
Leakage detection relays with only leakage tripping protection, leakage detection relays with leakage tripping and leakage locking protection; b.
Leakage detection relays with selective leakage tripping or leakage locking functions; leakage detection relays that can be combined with the above-mentioned a, b, c protection functions and have artificial bypass grounding protection. 4.1.2 According to the voltage level:
Leakage detection relays can be divided into three types according to the rated voltage level: 380V, 660V, and 1140V. 4.2 Basic parameters
4.2.1 The basic parameters of the leakage detection relay manufactured according to the requirements of 4.1.1 item a and b shall comply with the provisions of Table 1. Table 1
Rated voltage single-phase leakage action resistance setting value single-phase leakage blocking resistance setting value V
Through 1ka resistance single-phase
Grounding action time
Note: The three-phase leakage action resistance value should be three times the single-phase leakage action resistance value; the deviation is not more than ±20%. Network capacitance is 0.22~1.0μf/phase
Compensation efficiency
The basic parameters of the leakage detection relay manufactured according to the requirements of 4.1.1 item C shall comply with the provisions of Table 2. 4.2. 2
Grid capacitance to ground is not greater than 1u/phase, single-phase to ground action resistance value single-phase grounded through 1k resistor as the first level of leakage protection action time rated voltage
Leakage detection relay manufactured according to 4.1.1 item d, the basic parameters of the artificial bypass grounding protection part shall comply with the provisions of Table 3, 4.2.3
Rated voltage
Single-phase leakage action
Resistance setting value
Network capacitance is 0.22～1.0μf/phase,
Leakage action resistance value
3～11
Single-phase through 1ka resistor
Grounding action time
Residual current flowing through 1kQ resistor
After the relay is operated
Single-phase grounded through 1k2 resistor, its action time is not greater than 30ms. Leakage detection relays can be set without 4.2 for network capacitance current. 4
Compensation circuit.
4.2.5 Rated frequency of power supply: 50Hz
4.2.6 Leakage detection relay is of long-term working system. 5 Technical requirements
JB 6314--92
Leakage detection relay shall meet the requirements of this standard. It shall be manufactured in accordance with the drawings and documents approved by the prescribed procedures, and shall be inspected for explosion-proof performance by the nationally recognized inspection unit and obtain the "explosion-proof certificate". 5.1 Normal use conditions of leakage detection relays
Altitude not exceeding 2000m;
Ambient temperature -5～40℃,
Relative air humidity not exceeding 95% (25℃); In mines with explosive gas (methane) mixtures; In places without significant shaking and impact vibration; The installation inclination with the vertical plane does not exceed 15°; In an environment without gases and steam that damage insulation; In places without dripping water and other liquids intrusion; h.
Installation category: subclass; Pollution level: Level 3 5.2 The components of leakage detection relays (relays, buttons, control transformers, reactors, instruments, electronic devices, etc.) must comply with the provisions of their respective product standards or technical conditions.
5.3 The dielectric properties of the leakage detection relay must be able to withstand the AC 50Hz power frequency withstand voltage test. It lasts for 1 minute without breakdown or flashover. 5.3.1 For the main circuit and the control circuit and auxiliary circuit 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 main circuit
Ui≤60
60Ui300
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