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TXB7Z-63 DC Circuit Breaker
1、 The TXB7Z-63 series photovoltaic DC miniature circuit breaker is suitable for use in lines with rated current below 63 and DC rated voltages of 125
Product details
Product Introduction
1、 Scope of application
TXB7Z-63 series photovoltaicdirect-currentminiature circuit breakerSuitable for lines with rated current below 63 and DC rated voltages of 125V, 220V, and 440V, used for overload and short-circuit protection of facilities and electrical equipment in DC transmission and distribution systems, as well as infrequent conversion of links. The product has a beautiful appearance, standard rail installation, and has on/off display. Both the upper and lower terminals have wiring functions, so be sure to pay attention when wiring“﹢ / ﹣”Polarity, used for three pole circuit breakers in 440V circuits, with two poles connected in series for the surplus positive circuit. This circuit breaker can also be equipped with accessories such as auxiliary contacts, alarm contacts, and shunt release, and is widely used in industries such as communication, batteries, and locomotives.Small DC circuit breakers comply with IEC60947-2-1997 and GB14048.2-200.1 standards
2、 Model and specifications
3、 Working conditions
The altitude of the installation location shall not exceed 2000m;The ambient air temperature should not be higher than positive 40 degrees Celsius or lower than negative 5 degrees Celsius; And the average temperature value per day shall not exceed 35 degrees Celsius (except for special orders)
The relative humidity of the air at the installation location should not exceed 50% at a maximum temperature of 40 degrees Celsius. Higher relative humidity is allowed at lower temperatures, such as up to 90% at 20 degrees Celsius. Special measures should be taken for occasional condensation caused by changes in dry temperature.
There is no explosive medium in the air and no gas or conductive dust that can corrode metals or damage insulation.
A place without rain or snow invasion.
The pollution level is level III.
Installation category: The installation category of the main circuit of the circuit breaker is III, and the installation category of the auxiliary circuit and control circuit that are not connected to the main circuit is II.
4、 Structural characteristics
TXB7Z-63DC miniature circuit breakerIt is a new product developed on the basis of high breaking miniature circuit breakers. The characteristics of using magnetic blow out arc include short arc ignition time, high breaking ability, and reliable performance.5、 Main parameters and technical performance
| Shell level rated current lnm (A) | number of poles | Rated DC voltage (V) | Rated current ln (A) | Rated ultimate short-circuit capacity | |
| Breaking current lcu (A) | Time constant T (ms) | ||||
| 63 | 1P | DC240 (relative neutral line) | 1. 2, 3, 4, 6, 10, 16, 20, 25, 32, 40, 50, 63 | 6000 | 10 |
| DC110 (intermediate wire or neutral wire relative to ground) | |||||
| DC240 single-phase (relative neutral line) or three-phase (three pole circuit breaker) (three wire or four wire) | |||||
| 2P | DC220/440 single-phase (relative phase) | ||||
| DC110/240 single-phase (relative phase, three wire) | |||||
| test | Instantaneous release type | DC test current | Initial state | Tripping or non tripping limit | Expected results | notes |
| a | B、C | 1.13ln | cold state | t≥1h（ln≤63A） | Do not release | |
| b | B、C | 1.45ln | Immediately following item a | t＜1h（ln≤63A） | trip | The current steadily increases within 5 seconds |
| c | B、C | 2.55ln | cold state | 1s＜t＜60s（ln≤32A） 1s＜t＜120s（ln＞32A） |
trip | |
| d | B、C | 4ln | cold state | 1s≤t≤60s（ln≤32A） 1s≤t≤120s（ln＞32A） |
trip | Close the auxiliary switch and turn on the power supply |
| 7ln | 1s≤t≤15s（ln≤32A） 1s≤t≤30s（ln＞32A） |
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| e | B、C | 15ln | cold state | t＜0.1s | trip |
6、 Appearance and installation dimensions
7、 Ordering Notice
When placing an order, please indicate the following points:
Product model and name: such as TXB7Z-63DC circuit breaker/TXB7Z DC miniature circuit breaker instantaneous tripping rated current: such as 16A.
Polar number: 2
Order quantity: such as 2130 pieces.
Example of ordering: TXB7ZDC miniature circuit breaker， 1P，63A， 2160 pieces.
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