Product Features ● Application Scope NDB1 Series MCB of TT and TN-S earth-system have such functions: Short-Circuit and Overload protection, control and disconnect. Such breaker is used in low-voltage terminal distribution for industry, civil building, energy, telecommunication and construction. ● Design Features ◆ When MCB normally open or trip because fault,the phase line and neutral line should keep disconnected status to avoid the electric hurt by electrified neutral line. ◆ Full Protection Functions with overload and short-circuit protection. When connect or do breaking operation, you should connect the neutral line at first, then do breaking operation. ◆ Connection is safety and reliable: Use “Frame” connection structure ◆ Easily mounting: TH35 standard mounting rail.
2 NDB1 Series MCB PRODUCT PROFILE ● Structure Features ◆ NDB1-32 External Structure ◆ NDB1-125 External Structure 1、Model 2、Operation Handle 3、Load 4、Line ● Standards NDB1-32、NDB1-125 Standards as follow: ◆ GB 10963.1 Electrical accessories-Circuit-breakers for over-current protection for household and similar installation-Part 1: Circuit-breakers for AC operation ◆ IEC 60898-1 Electrical accessories-Circuit-breakers for overcurrent protection for household and similar installation-Part 1: Circuit-breakeres for a.c. operation 1 2 4 3 1、Model 2、Switching Indicator 3、Operation Handle 4、Load 5、Line 3
3 PRODUCT PROFILE
Working Condition ● Electrical symbol ● Applicable Condition ◆ Ambient Usage Temperature and Storage Temperature Ambient Usage Temperature: -35℃~+70℃, Standard Temperature: +30℃, correction factor of different ambient usage temperature refer to sheet 1 Storage Temperature: -35℃~+70℃. ◆ Altitude The altitude of the mounting site≤2000m ◆ Relative Usage Humidity and Relative Storage Humidity The relative humidity shouldn’t exceed 50% when the ambient air temperature is +40 degrees, higher humidity can be allowed in lower temperature. For example, the humidity can be 90% when the ambient temperature is +20 degrees. Necessary measures should be acted for the condensation produced by the changed temperature. ● Pollution Degree 2 ● Protection Level Level of Product Protection: IP20 ● Mounting Types Ⅱ(For Load Level) and Ⅲ(For distribution and control Level) ● Mounting Method Mounted on TH35mm x 7.5 Standard Rail. ● Mounting Direction ◆ Vertical Mounting: The inclination between mounting plane and vertical plane should ≤±5 degrees ◆ Horizontal Mounting ● Environmental Requirement Comply with RoHS
4 NDB1 Series MCB PRODUCT PROFILE No. Implication Instruction 1 Brand Code ND： 2 Product Code B：Miniature Circuit Breaker 3 Design Code 1 4 Frame Rating-Rated Current (A) 32 125 5 Instantaneous Tripping Characteristics C：Instantaneous Tripping Range 5In～10In； B：Instantaneous Tripping Range 3~5In C：Instantaneous Tripping Range 5~10In D：Instantaneous Tripping Range 10~14In 6 Rated Working Current (A) 6，10，16，20，25，32 50A，63A，80A，100A，125A 7 Number of Poles 1PN 1P，2P，3P，4P
Product Technical Characteristic 4.1 Model and Implication ND B 1 – /
5 PRODUCT PROFILE 4.2 Technical Parameters Model NDB1-32 NDB1-125 Current Voltage (V) AC230 AC230/240;DC60/80(1P), AC400/415;DC80/125 (2P、3P、4P) Rated Current (A) 6、10、16、20、25、32 50、63、80、100,125 Tripping Characteristics C C、D Number of Poles 1PN 1P、2P、3P、4P Rated Insulation Voltage (V) AC400V AC500V Rated Ultimate Short Circuit Breaking Current 4.5kA Rated Operation Short Circuit Breaking Current 4.5kA Rated Working Frequency (Hz) 50/60 50/60 Mechanical and Electrical Life 10000 10000 Connecting and Wiring Capacity ◆ Tunnel Connecting Terminal ◆ Terminal Connecting Area: 1~6 mm2 cable is applicable ◆ Connecting Screw is M4,Torque is 1.2N.m ◆ Tunnel Connecting Terminal ◆ Terminal Connecting Area: 10~50 mm2 cable is applicable ◆ Connecting Screw is M7, Torque is 3.5N.m
7 PRODUCT PROFILE ● NDB1-32 Tripping Curve C Curve ★ Protect nominal load and distribution cables ★ Rated Current: 6-32A ★ Tripping Characteristics: Instantaneous tripping range 5In~10In ● NDB1-125 Tripping Curve C Curve ★ Protect lighting distribution circuits ★ Tripping Characteristics: Instantaneous tripping range 5In~10In D Curve ★ Protect industrial distribution systems ★ Tripping Characteristics: Instantaneous tripping range 10In~14In 4.3 Tripping Curve
Accessory Note: Accessory parameters, please refer to “OF、SD, MX+OF” specimens. No. Name Accessory Code Function and Matched Quantity 1 Auxiliary Contact OF Linked to the left side of MCB to indicate OPEN or CLOSE status of the associated breaker. Matched quantity: 3 Pcs Max. 2 Alarm Contact SD Linked to the left side of MCB to indicate the accidental tripping status of the associated breaker. Matched quantity: 3 Pcs Max. 3 Shunt Release MX+OF Linked to the right side of MCB to indicate accidental tripping status and remote breaking control of associated breaker. Auxiliary Contact OF Alarm Contact SD Shunt Release MX+OF