This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, spare parts, etc. of marine master controllers. This standard is applicable to controllers with AC 50Hz, rated voltage 380V and below, AC 60Hz, rated voltage 440V and below, and DC rated voltage 220V and below. JB/T 5790-1991 Marine Master Controller JB/T5790-1991 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Marine Master Controller
JB5790—1991
This standard refers to IEC337-1 (1970), IEC337-1A (1973), IEC337-1B (1975) control switches (low-voltage switchgear for control circuits and auxiliary circuits, including contactor relays) and IEC92 (1980) "Marine Electrical Equipment" related content.
1 Subject Content and Scope of Application
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, spare parts, etc. of marine master controllers (hereinafter referred to as controllers).
This standard applies to controllers with AC 50Hz, rated voltage 380V and below, AC 60IIz, rated voltage 440V and below, and DC rated voltage 220V and below.
2 Reference standards
GB1497
GB2423.16
GB2423.17
GB2900.18
GB4207
GB7094
Basic test methods for low-voltage electrical appliances
Basic standards for low-voltage electrical appliances
Basic environmental test regulations for electric and electronic products
Test A: Low temperature test method
Basic environmental test regulations for electric and electronic productsBasic environmental test regulations for electric and electronic productsBasic environmental test regulations for electric and electronic productsElectrical terminologyBasic terminology||tt ||Electrical terminology Low-voltage electrical appliances
Test Db: Alternating damp heat test method
Test J: Mildew test method
Test Ka: Salt spray test method
Determination method of comparative tracking index and sliding resistance tracking index of solid insulating materials under humid conditions Protection level of low-voltage electrical enclosure
Test method of alarm (sinusoidal) test for marine electrical equipment 3 Terms, symbols, codes
3.1 Terms and definitions:
3.1.1 Fusing short-circuit current
When the short-circuit protection device (SCPD) is a fuse, the limiting short-circuit current at this time is called the fusing short-circuit current. 3.1.2 Pollution degree
The pollution degree is a classification of environmental conditions based on the amount of conductive or hygroscopic dust, free gas or salts and relative humidity, as well as the frequency of surface resistivity reduction events due to moisture absorption or condensation. 3.1.3 Installation category (overvoltage category)
For electrical appliances or equipment installed in low-voltage systems with matched insulation. According to its rated insulation voltage to ground (U,), its peak value of impulse withstand voltage to ground is specified accordingly, that is, its installation category (or overvoltage category) is specified. The installation category is based on the protection of the transient overvoltage suppression device; the transient voltage breakdown value of the transient overvoltage suppression device should be equal to the priority value of the impulse withstand voltage of the specified installation category (overvoltage category).
3.1.4 Automatic reset device
Approved by the Ministry of Machinery and Electronics Industry on October 15, 1991, 74
Implemented on October 1, 1992
m. Mildew test;
n. Salt spray test.
7.3.2 Type test rules
JB5790—1991
a. For 7.3 a, the test products used for type test must be formal samples, and there should be no less than 2 units for each test item. If one unit fails in any test item, the type test is considered to be unqualified. After the defects of the test product are eliminated, the type test can be carried out again until all test items are passed. Only then can the type test be considered to be qualified. b. For 7.3 bf, the controller used for type test must be randomly selected from the batch of products that have passed the factory test. There should be no less than 2 units for each test item. If all the specified type test items can be passed, it is considered that the type test is qualified. If one unit fails in one item during the test, retesting is allowed. The number of units for retesting should be doubled according to the original sampling number. If the retesting passes, the test is still considered to be qualified. If one unit still fails, the type test is unqualified.
8 Marking, packaging, transportation and storage
8.1 Marking
A durable nameplate made of corrosion-resistant and flame-retardant material should be installed in a conspicuous position on the controller. The nameplate should indicate: a.
Manufacturer's name or trademark;
Model and name;bzxZ.net
Rated working voltage;
Agreed heating current;
Rated frequency;
Manufacture date;
Ship inspection mark.
8.2 Packaging
The transport packaging of each controller should be rainproof or moisture-proof and protect the product from damage during transportation. The outer wall of the packaging box should have obvious and durable text marks, and the content should include: a.
Manufacturer name and address;
Consignee name and address;
Product name, model, quantity:
Product weight, size;
Mark "Marine controller", "Packing year and month", "Handle with care", "Do not get wet" and other words or symbols. The technical documents provided with the product packaging include packing list, product certificate, product installation and operation manual. 8.3 Transportation and storage
The packaging box shall not be attacked by rain or snow during transportation and storage. The product should be placed in a warehouse with good air circulation and relative humidity not more than 90% (at 20±5℃) and temperature of -25~+45℃. 9 Spare parts
The manufacturer shall have spare parts such as contacts and contact springs for the controller, and the quantity shall be specified in the specific product technical documents. Additional notes:
This standard is proposed and managed by the Shanghai Electric Science Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by the Shanghai Electric Science Research Institute of the Ministry of Machinery and Electronics Industry and other units. The main drafters of this standard are Tang Wansheng, Sun Qianyu and Zhang Zhilin. 83
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