NDB2LE-25

1、Application Scope and Purpose

• Short-circuit protection
• Overload protection
• Current leakage
• Isolation

The NDB2LE-25 series of residual current action circuit breakers provide the ground leakage, direct or indirect electric shock by human body and other faults protection, which are applicable to the low-voltage terminal distribution in the industry, civil buildings, energy, communication, infrastructure and other fields.

2、Model and implication

3、Main technical parameters

• Electrical parameters
  • Rated working voltage: AC230V/240V
  • Frequency: 50/60Hz
  • Rated woring current: 6A, 10A, 16A, 20A, 25A

• Rated breaking capacity: 6kA
  • Rated impulse withstand voltage: 4kV
  • Rated residual operating current: 30mA
  • Rated insulation voltage: 500V
  • Type of the residual tripping current: Type AC
  • Mechancal life: 20,000 times
  • Electrical life: 60,00 times
• Isolating function
  • Switch on and off instructions
  • The green mark in the inspection window indicates that the contact is in disconnected position
• Wiring
  • Tunnel terminal blocks
  • Terminal connection area: Apply to (1~16mm²)
  • Wiring deepness: 11.5mm
  • Standard torque: 1.2N.m
• Standard

○GB/T 16917.1、IEC 61009-1、GB/T16917.22、IEC61009-2-2

4、Working conditions

●Altitude:≤2000m

●Ambient temperature:-25℃~+55℃

●Wet heat resistance:≤95%

●Pollution level:2

5、Time-Current curves

• Type C curve
  • Tripping characteristics: Range of instantaneous tripping 5In～10In

C curve(5～10)In

6、Outline and installation dimensions

7、Installation method

It can be easily installed on the TH35mm×7.5 standard guide

8、Packaging and storage

Maximum packaging quantity are 12 pieces/box. The packaged products should be stored in a warehouse with the air ventilation and the relative humidity no more than 80% and the temperature between -30℃ and +70℃. No acidic, alkaline or other corrosive gas exists in the ambient air in the warehouse. Under the above conditions, the storage period shall be no more than three years since the manufacturing date.

9、Environment

●Comply with the requirements of RoHS directives.

10、Accessory list and installation

No 12、Notices

• The user must be responsible for product issue that occurs because the user disassembles the product without approval;
  • It fails to provide protection for the electric shock caused due to two phases of the contacted lines to be protected;
  • Do not test the insulation resistance of the product or carry out power frequency withstand voltage tests directly or indirectly with a megger or similar devices on the product so as to avoid damage to the product. If required by users, our company can provide an effective proof of the conformance test;
  • In case of insulation resistance test on the project line, do not connect the product so as to avoid

misunderstanding of the product quality or damage to the circuit board;

• Wiring of the leakage circuit breaker shall be done according to the up-in and down-out principle. Do not wire it wrongly. Otherwise, it may damage the product by pressing the test button again or in case of current leakage in the line;
  • Wiring must be reliable to prevent the malfunction of the leakage circuit breaker or terminal burning damage due to the abnormal heat generation on the terminal;
  • Carry out a monthly stimulated test on the current leakage. Namely, press the test button to make the circuit breaker act so as to test proper operation of the circuit breaker, and replace the abnormal products in a timely manner;
  • For automatic disconnection of the leakage circuit breaker, analyze fault reasons for the line or equipment.