JB/T 9008.5-1999 Wire Rope Electric Hoist Main Circuit Limiter JB/T9008.5-1999 Standard Download Decompression Password: www.bzxz.net

JB/T9008.5---1999
This standard is an editorial revision of ZBJ80013.5-89 "Wire Rope Electric Hoist". The main technical content has not changed. The revision only made changes to the original standard. This standard is part of the JB/T9008 "Wire Rope Electric Hoist" series of standards, which includes the following six parts: JB/T 9008.1-1999
Wire Rope Electric Hoist Types and Basic Parameters JB/T 9008.2--1999
Wire Rope Electric Hoist Technical Conditions
Conical Rotor Motor for Wire Rope Electric Hoist JB/T 9008.3--1999
JB/T 9008. 4-1999
Test method for electric wire rope hoist
JB/T9008.5--1999 Main circuit limiter for electric wire rope hoistJB/T9008.6--1999 Technical conditions for acceptance of electrical control equipment for electric wire rope hoistThis standard replaces ZBJ80013.5-89 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Standardization of Hoisting Machinery. The responsible drafting unit of this standard: Tianjin Hoisting Equipment Co., Ltd. The main drafters of this standard: Lu Xuexi, Zhou Yaohua, Shi Xuezheng, Li Daozhong, Cui Zhenyuan, Wang Shuming. 234
1 Scope
Machinery Industry Standard of the People's Republic of China
Electric wire rope hoists-Limit switch of main circuitJB/T 9008.5--1999
Replaces ZBJ80013.5--89
This standard specifies the structural type, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of main circuit limit switches (hereinafter referred to as limit switches) for general-purpose electric wire rope hoists. This standard applies to the upper and lower limit limits of the lifting mechanism of the electric hoist during lifting. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T2423.4-1993 Basic environmental test procedures for electrical and electronic products Test Db: Alternating damp heat test method GB/T4942.2-1993 Protection level of low-voltage electrical enclosures GB/T13384-1992 General technical conditions for packaging of electromechanical products GB/T14048.1--1993 General rules for low-voltage switchgear and control equipment JB/T 4315-1997
Crane electronic control equipment
3 Structural type
3.1 The limiter should be a closed structure, and its enclosure protection level should comply with IP54 in GB/T4942.2. 3.2 The limiter operating lever is a push-pull type.
3.3 The action force and overtravel of the limiter push rod should meet the requirements of the matching host. 3.4 The structure of the limiter should have a phase error protection function. 3.5 Model indication method:
Additional code (TH for wet and hot zone)
Rated current (A)
Design serial number (expressed in Arabic numerals) Characteristic letters of main circuit limiter
3.6 Marking example
The wet and hot zone type main circuit limiter with rated current of 20A and design serial number 1 is marked as: Limiter QZX1-20TH JB/T 9008.5---1999 Approved by the State Machinery Industry Bureau on June 28, 1999 and implemented on January 1, 2000
4 Technical requirements
4.1 Performance requirements
JB/T 9008.5--1999
4.1.1 The rated voltage of the limiter is three-phase AC 380V and the frequency is 50Hz. Special requirements should be negotiated and ordered. The rated current of the limiter is: 10A, 16A, 20A, 32A, 40A, 63A. 4.1.2
The power-on duration FC of the limiter is 40%.
The number of operation cycles of the limiter is 240 times/h.
The electrical life of the limiter should not be less than 150,000 times. 4.1.5
The mechanical life of the limiter should not be less than 600,000 times. 4.1.6
The temperature rise of the limiter contact should comply with the relevant provisions of 7.2.3 of GB/T14048.1-1993. 4.1.7
The electrical space and creepage distance of the limiter should comply with the provisions of 7.1.3 of GB/T14048.1-1993. 4. 1. 8
The limiter should be tested for its on-off capacity and should be able to work normally after the test. 4. 1.91
phenomenon.
The limiter shall be able to withstand the 1-minute dielectric withstand voltage test of 50Hz AC sine wave and 2500V, and there shall be no breakdown or flashover after the test. 4.1.11 The limiter shall be subjected to the moisture and heat resistance test according to the Db level specified in GB/T2423.4 and must meet the qualified requirements. 4.1.12 The insulation resistance of the limiter shall not be less than 1.5M2 (this data is only for reference during the dielectric test). 4.2 Environmental requirements
4.2.1 The altitude of the installation and use site shall not exceed 2000m. 4.2.2 The ambient air temperature under normal working conditions shall not be higher than 40C (the average temperature within 24h shall not exceed 35C) and shall not be lower than -5C (when it is lower than -5C, it shall be proposed when ordering). 4.2.3 When the ambient temperature is 40C, the relative humidity of the air shall not be greater than 50%; if the temperature is low, the relative humidity is allowed to increase. 4.2.4 The normal working environment should be free of explosive and dangerous media, and the medium should not contain gases that are sufficient to corrode metal and damage insulation. It should be installed vertically, with an installation inclination of no more than 5°. 4.2.5A
4.2.6 The pollution level of the use environment should comply with the provisions of 6.1.3.2 of GB/T14048.1-1993. 4.3 Basic requirements
4.3.1 The limiter housing must have a grounding screw that is compatible with the product's rated current, and the measured value of the connection resistance between the metal housing and the grounding screw should not be greater than 0.10.
4.3.2 The metal housing of the limiter should be smooth; the painted surface should be beautiful without cracking or falling off; the surface of the insulating part should be smooth without bubbles. 4.3.3 Fruit
All ferrous metal parts should be protected by a coating or paint layer. 4.3.4
The limiter push rod should be flexible and reliable. The insulator terminals of the stopper should have a raised phase sequence number. 5 Test method
The electrical life test of the stopper shall be carried out according to the data in Table 1 and the provisions of 8.2.3.7.2 in GB/T14048.1-1993. Table 1 Www.bzxZ.net
cosg±0.05
Note: l. — rated current of the stopper; l—test current; U. — rated voltage, U-test voltage. cosg±0.05
Operation cycle
Number/h
5.2 The mechanical life test of the stopper shall be carried out according to the method specified in 8.2.3.7.1 in GB/T14048.1-1993. 5.3 The temperature rise test of the limiter contact shall comply with the provisions of 8.2.3.3 of GB/T14048.11993. 5.4 The electrical clearance and creepage distance measurement of the limiter shall comply with the provisions of 6.4.3 of JB/T4315-1997 and Appendix A of GB/T14048.1-1993236. 5.5 The on-off capacity test of the limiter shall be carried out according to the data in Table 2 and the provisions of 8.2.3.5 of GB/T14048.1-1993. Table 2
Connection and disconnection conditions
Connection 10
Disconnection 8
cosq±0.05
Number of tests
Interval time
5.6 The dielectric property test of the stopper shall be carried out in accordance with 7.2.3 and 8.2.3.4.3 of GB/T14048.1-1993. 5.7 The damp heat resistance test of the stopper shall be carried out in accordance with the Db level alternating damp heat test method in GB/T2423.4. 5.8 The insulation resistance measurement of the stopper shall be carried out in accordance with the relevant provisions in GB/T14048.1. 5.9 The protection grade test of the stopper housing shall be carried out in accordance with the provisions in GB/T4942.2. Each connection time
5.10 The low temperature resistance test of the stopper shall be carried out in accordance with the requirements of 7.2.9 of GB/T14048.1-1993. The low temperature test temperature value is determined according to product requirements.
5.11 The limiter vibration resistance test is carried out according to the provisions of 6.3.4 of JB/T4315--1997. 5.12 The appearance inspection of the limiter shall be carried out in accordance with the provisions of 6.4.1 of JB/T4315-1997. 5.13 The power-on operation test of the limiter shall be carried out in accordance with the provisions of 6.4.2 of JB/T4315-1997. 6 Inspection rules
6.1 The inspection rules of the limiter shall comply with the relevant provisions of Chapter 9 of GB/T14048.1-1993. 6.2 The limiter must have a product certificate. The main engine manufacturer shall conduct acceptance based on the product certificate provided by the manufacturer. If necessary, the main engine manufacturer has the right to propose random inspection and verification of qualified products of the limiter at the manufacturer or on its own. 6.3 Newly designed or newly trial-produced products must undergo type testing, and products produced in batches and stably shall undergo routine inspection tests. Periodic tests shall be carried out in accordance with the provisions of Chapter 9 of GB/T14048.1-1993. 6.4 Type test
Test and inspect according to the test items and contents specified in Chapter 5. Note: The humidity and heat resistance test is only required for products used outdoors. 6.5 Inspection test (factory test)
6.5.1 Each stopper must be inspected and tested, and can only be shipped after passing the test. 6.5.2 Inspection test items: In addition to the appearance inspection, the test should also be carried out in accordance with the provisions of 5.6 and 5.13. 6.6 If the specified test items cannot reflect all the performance or special requirements of the product, they should be clearly specified in the standards of the respective products. 7 Marking, packaging, transportation and storage
7.1 The marking of the stopper shall comply with the provisions of 7.1, 7.3 and 7.4 of JB/T4315-1997. 7.2 The packaging of the stopper is allowed to be packed in cartons when it will not be damaged due to transportation. Otherwise, it should be packed in wooden boxes. When wooden boxes are used for packaging, it should comply with the relevant provisions of GB/T13384. 7.3 The transportation and storage of limiters shall comply with the relevant provisions of Chapter 9 of GB/T14048.1-1993.
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