1. Applicable Scope and Purpose of Circuit Breaker

The NDM2-63 molded case circuit breaker (hereinafter referred to as circuit breaker) applies to infrequent switching of circuits with the AC 50/60Hz, the working voltage of AC415V and working current of 63A as well as infrequent motor starting. With the overload, short circuit and undervoltage protection functions, the circuit breaker can protect lines and power equipment from damage.

3. Specification and Model Description of Circuit Breaker ND M 2-63 □ □/ □ □ □ □ □ □ □1  2 3 4  5  6   7  8  9  10 11 12 13   
1Enterprise codeND: “Nader” low-voltage apparatus
2Product codeM: Molded case circuit breaker (MCCB)
3Design S N2
4Shell frame level63
5Breaking capacity levelL: Standard type
M: Relatively high breaking type
6Operation modeNo code: Direct handle-operated mode
P: Motor-operated
Z: Rotation handle
7Number of poles3, 4
8Release code0: Release (none)
2: Instantaneous tripper only
3: Complex tripper
9Accessory codeSee Table 1
10Application codeNo code: Power distribution type
2: Protection motor type
11N-pole (neutral pole) type of the 4P productA: The N-pole isn’t installed with an overcurrent release, but always connected
B: The N-pole isn’t installed with an overcurrent release, but on-off with the other three poles
C: The N-pole is installed with an overcurrent tripper, and on-off with the other three poles
12Rated currentSee Table 2
13Cabling typeNo code: Normal product
Z1: Rear-plate connection
Z2H: Plug-in rear-plate connection
Z2Q: Plug-in front-plate connection
Z3H: Integrated plug-in rear-plate connection
Z3Q: Integrated plug-in front-plate connection

3. Main Technical Parameters of Circuit Breaker

Rated current of frame Inm (A)63
Rated current In (A)10, 12.5, 16, 20, 25, 32, 40, 50, 63
Rated insulation voltage Ui (AC V)1000
Rated impulse withstand voltage Uimp (V)8000
Rated working voltage Ue (AC V)380/400/415
Power frequency withstand voltage U (1min) (V)3500
Utilization categoryA
Number of poles34
Breaking capacity levelLM/
Rated limit short-circuit breaking capacity Icu (kA)AC380/400/415V3652.552.5
Rated operating short-circuit breaking capacity Ics (kA)AC380/400/415V  273838
Operating performance (times) Electrical life8000
Mechanical life  Maintainable free life20000
Maintainable life40000
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