Cixi City giant Shing Communication Equipment Factory is a professional production: Putian Security Unit | century man security unit | Japanese naval security units | Huawei security unit | Cologne security unit | Le-security unit | Tianle security unit | Alcatel Security Module Security ? unit security unit, specific models are as follows: FA9-280, FA9-115, FA8-20, FA9-201, FA8-14, FA10-12, FA9-79V, FA9-105, FA9-175, FA9-26, JPX280 , FA9-121, FA9-906, FA9-67, FA9-07, FA9-182, FA10-97, FA9-81, FA9-173, FA9-400Q, FA8-149, FA9-201, FA9-172, FA9 -173, FA9-182FA9-47, FA9-199, FA9-182AFA9-81, FA10-53SO, FA10-12B, FA9-144, FA10-4710, FA9-210, FA10-95, FA9-182, FA10-08IM -P, FA10-08IIA, FA8-68, FA8-67, FA11-07, FA10-906A, FA906B-1, FA906FA9-83, FA9-144, FA9-668, FA9-280, FA9-20, FA8-149 , FA9-81, FA10-53SO, FA10-12B, FA9-144, FA10-4710, FA9-210, FA10-95, FA9-182, FA10-08IM-P, FA10-08IIA, FA8-68, FA8-67 , FA11-07, FA10-906A, FA906B-1, FA906, FA9-83, FA9-144, FA9-668, FA9-280, FA9-20, FA8-149FA8-20, FA9-201, FA8-14, FA10 -12, FA9-79V, FA9-175, FA9-26, JPX280, FA9-121, FA9-906, FA9-67, FA9-07, FA9-182, FA9-105, FA9-172, FA9-173, FA10 -97, FA9-81, FA9-173, FA9-400Q, FA8-149, FA9-201, STO-151.FA9-182, FA9-47, FA9-199, FA9-182A, FA9-32, FA8-25 , FA9-210, STO-151 on the sea:. FA9-47 FA8-399 STO-399 FA9-199 FA9-210,: FA9-118 FA9-121 FA9-121E, Century Man: FA9-182A FA9- 182523 Factory: FA9-80 FA9-78 FA9-79V FA9-87 Kim Jin: FA9-108C FA9-108D FA11-66, Putian: FA814 FA8-149 Putian FA9-156 508: FA9-155, Huawei: FA9-172, FA9-173 , FA10-97, FA9-81, FA9-173, FA9-83, FA9-280, FA9-280J, gas discharge tube Security Unit: JPX658-FA10-97, semiconductor discharge security units FA9-81C, Security Unit JPX658- FA9-280J, maintenance and operation hexagonal unit, Cologne FA9-121, BA-1 unit, the gas discharge tube unit security unit JPX256-FA9-173J, security units, FA9-81 FA9-173, FA9-280, JPX280, Kazuma: FA9-906B FA9-906 Kerry JPX256-FA9-172, FA814 FA820 FA9-175 FA9-144D, JPX01, Kazuma: FA9-906B FA9-906 on the sea: FA9-47 FA9-199 FA9-210 Huawei: FA9-81 FA9-173, Xinhai, East crown: FA9-250, 506 Description: FA9-118 FA9-121 FA9-121E, JPX280, music JPX256-FA9-400Q, security unit JPX202-FA9-400Q, security units, Letong Security Single security units, security units installed in the communications field in the patch panel and shoulder protect communications equipment from over-voltage, over-current damage to the task. Security unit is inserted in the main distribution frame (MDF) terminal block for security personnel and equipment to prevent overvoltage, overcurrent damage devices. The so-called over-voltage, over-current, is to point out now foreign voltage and current devices on the device itself exceeds the normal operating voltage and current. Security unit, with the over-voltage, over-current protection devices and development progress. Currently, according to the device and product mix mainly: gas discharge tube plus PTC, PTC and other semiconductor discharge plus two types of security units. 1, the gas discharge tube plus PTC security unit works: When external over-voltage, gas discharge tube discharge current is directed into an outside line, if the duration is longer, the heat discharge sustaining discharge issued by hot melt melting block so that the outside of the direct conduction, short-circuit fail-safe, while the output alarm signal; when the line suffered when the current invasion, PTC resistance is rising rapidly, so that the line is similar to the open state, over-current phenomenon under control, after the overcurrent disappear, PTC automatic recovery; 2, semiconductor discharge plus PTC security unit model is ionized gas tube discharge, after discharge temperature is high, it may affect the life of the main distribution frame; at the same time the presence of the gas discharge tube and failure due to chronic leakage phenomenon, and the ground outside after failure presents an open state, in this case, reduce the reliability of protective security unit, can not even play its due protection. Semiconductor discharge security unit in addition to a gas discharge tube security unit basic functions, there are the following characteristics: semiconductor discharge due to low temperature, are unlikely to cause a fire; chronic leakage phenomenon does not exist, the reliability of protective security unit; semiconductors discharge voltage surge on the reaction rate can be lower than 1ns, fast response. Common security unit brand Putian, Huawei, on the sea, Alcatel, Zhou Tong and other security units. 1 security unit required to comply with the testing requirements of the basis 1.1 YD / T694-1999 "MDF" 1.2 YD / T940-1999 "communication device over-voltage protection of semiconductor" 1.3 YD / T741-2002 "communications equipment overcurrent protection with a positive temperature coefficient (PTC) thermistors technical requirements "1.4 GB / T2828.1-2003 / ISO 2859-1: 1999" Sampling procedures for inspection "test items, test methods and technical requirements 3.1 Overall structure, installation size and visual inspection 3.1.1 Overall structure and installation dimensions meet requirements of the drawings, weld neat rounded shape without defects, cracks and other phenomena, colors meet the requirements, consistent color between the products. 3.1.2 The product shall have a clear product model and registered trademark of flags that should be solid, the correct position. 3.1.3 package to meet the requirements, product name on the box model, etc. clearly marked; box job number, test number, certificate and so complete. Tester: Insulation Resistance Tester 3.2 insulation resistance: a, b between the lines, and the insulation resistance between a, b and ground, an alarm signal wire, other metal parts in normal atmospheric conditions (temperature 15-35 ° C, relative humidity 45-75%, pressure 8 6-106Kpa, under the same below) is not less than 1000MΩ, (after the high temperature test, low temperature test, temperature test and damp heat test of not less than 100MΩ). Test Method: The insulation resistance of the test sample shall be (i.e., not conducting any interaction between the two terminals as well as any of the terminals and the metal to be tested between each fixed contact terminal and is connected to the housing or mounting plate to rest all terminations between pieces) test results should meet the above requirements. Test equipment: DM-100B Digital Micro Europe, contact resistance Table 3.3 microvolts security unit pins and security arrangements (or security holder, the same below) indirect line terminal (or reed, the same below) between the contact resistance; requirements: (1) Under normal atmospheric conditions, the contact resistance between the two contact spring is not more than 7m Ω (after the high temperature test, low temperature test, temperature test and damp heat test, the contact resistance value is not more than 3mΩ.) The security unit in Bulgaria 10-15 times per minute, 200 times the frequency swap arrangements, security units and security arrangements pins contact resistance value between terminals is not more than 3mΩ. Security arrangements between the security unit and the contact resistance in addition to the requirements to achieve the specified indicators must also plug the lightweight, feel good. 3.4 alarm signals an alarm signal when the action of security units visible. 3.5 Overvoltage protection performance parameters a DC breakdown voltage Udc = 230 ± 3040 9 b Insulation resistance: ≥1 × 10 Ω 3.6 overcurrent protective properties 3.6.1PTC performance properties (Note 2) a room temperature resistance ≤22Ω, a, b line the difference between resistance ≤2Ω; (by impact current capability, resistance frequency current capability, resistance frequency voltage capability and retest value of the environmental test) imports PTC room temperature resistance 6.4-9.6Ω (8Ω ± 20%) b does operating current, 110mA1h no action, (test voltage 60Vdc, ambient temperature at 40 ℃) c limiting characteristics (25 ℃), the Table 1. Table 1 Current (A) operation time (S) Note 0.35 ≤18 current partition or limiting to 150mA 0.5 ≤10 1 ≤1 current cut off or limiting to 500mA 3 ≤0.2 3.6.2 fuse inside (pipe) Performance Security Current: 0.4A1 hours without action action current: 1A> 0.5S action, 2A≤0.5 S 3.6.3 external action fuse (tube) Performance Security Current: 5A1 hours without action; action current: 10A millisecond action. 3.7 Fail-Safe Performance Test Instrument: NLT-1 type failure protection and alarm tester When the discharge current of 2.5Arms discharge, the discharge circuit of a line or b wire should be grounded in the 15S. Quality plastic parts within the security unit of 3.8 plastic parts combustion plant performance test requirements should detect file "flame-retardant ABS plastic parts, raw materials and general testing requirements," the relevant provisions. 3.9 plating quality required quality within the requirements of the security unit plating plant should detect file "plating universal testing requirements," the relevant provisions. The overall determination of the oversight of security unit 24 detects the rules of inspection methods and details are as follows: According to GB / T2828.1-2003 / ISO 2859-1: 1999 "Sampling procedures for inspection," sampling, monitoring the quality level P0 = 0.25%, test level grade Ⅱ, the security unit implementation details in Table 2. Table 2 Sample No. Test item test (this) Note 1 Appearance 2 at room temperature environment Ⅱ Ⅱ insulation resistance after normal, low temperature, high temperature, temperature change and humidity test 3-security unit and terminal block contact resistance S-3 at room temperature, low temperature, high temperature, temperature changes and humidity test after four fail-safe performance and alarm functions in normal environment 5 S-3 plug 200 times over-voltage protection performance Ⅱ 6 overcurrent protective properties Ⅱ 7 insulating material combustion performance S-3 normal environment according to GB5169.7 -858 plating quality Ⅱ normal environment