NDM2L-400

2024年7月10日未分类 9750

1. Applicable Scope and Purpose of Circuit Breaker

The NDM2L-400 molded case circuit breaker with the residual current protection (hereinafter referred to as circuit breaker) applies to infrequent switching of circuits with the AC 50/60Hz, the working voltage of AC415V and the working current up to 400A. With the overload, short circuit and undervoltage protection functions, the circuit breaker can protect lines and power equipment from damage. Meanwhile, they can deal with the personal safety, fire hazards and other potential risks caused due to long-term ground faults that can’t be detected with the overcurrent protection function.

2. Specification and Model Description of CircuitBreaker

ND M 2 L – □ □ □ / □ □ □ / □ □ □ □ □ □ □1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
SN	SN name	NDM2L
1	Enterprise code	ND: “Nader” low-voltage apparatus
2	Product code	M: Molded case circuit breaker (MCCB)
3	Design SN	2
4	Derived code of the	L: Residual current protection
5	Shell frame level	400
6	Breaking capacity level	M: Relatively high breaking type
6	Breaking capacity level	H: High breaking type
7	Operation mode	No code: Direct handle-operated mode
		P: Motor-operated
		Z: Rotary operation
8	Derived code of the function	No code: Type AC current leakage protection type
8	Derived code of the function	A: Type A current leakage protection type
9	Delay type	X: Non-time delay
		Y: Delay
		XI: Non-time delay + alarm non-tripping
		YI: Delay + alarm non-tripping
10	Residual current release	V: Type V residual current release
11	Number of poles	3, 4
12	Release code	3: Complex tripper
13	Accessory code	See Table 1
14	Application code	No code: Power distribution type
15	N-pole (neutral pole) type of the 4P product	A: The N-pole isn’t installed with an overcurrent release, but always
		B: The N-pole isn’t installed with an overcurrent release, but on-off
		C: The N-pole is installed with an overcurrent tripper, and on-off with
16	Rated current	See Table 2
17	Cabling type	No code: Normal product
		P: Connection busbar
		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

Note:
1.When the operation mode is electric operation or manual operation, the residual action current gear, residual current action time gear, and leakage indication button can’t be adjusted;
2.Lower inlet wire not allowed for the 4P Type A product.

3. Main Technical Parameters of Circuit Breaker

Table 2 Main Technical Parameters of Circuit Breaker

Model				NDM2L-400
Rated current of frame Inm (A)				400
Rated current In (A)				225, 250, 315, 350, 400
Rated insulation voltage Ui (AC V)				1000
Rated impulse withstand voltage Uimp (V)				8000
Rated working voltage Ue (AC V)				380/400/415
Utilization category				A
Number of poles				3			4
Breaking capacity level				M	H		/
Rated limit short-circuit breaking capacity Icu (kA)				65	100		65
Rated operating short-circuit breaking capacity Ics (kA)				42	70		42
Rated residual short-circuit making and breaking capacity I△m(kA)				0.25 Icu
Rated residual action current I△n(mA)		Non-time delay	Type AC	Type V 30/300/500/1000
			Type A	Type V 30/300/500/1000
		delay	Type AC	Type V 300/500/1000
			Type A	Type V 300/500/1000
Rated residual non-action current I△no(mA)				0.5I△n
Residu al current actiontime	Residual current			I△n	2I△n	5I△n		10I△n
	Non-time delay	Maximum breaking time (s)		0.2	0.1	0.04		0.04
	delay	Maximum breaking time (s)		0.5, 1.152.15	0.35, 12	0.25, 0.91.9		0.25, 0.91.9
		Limit non-driving time (s)		/	0.1, 0.51	/		/
Operating performance (times)		Electrical life		7500
		Mechanica l life	Maintainable free life	10000
			Maintainable life	20000

3.1Selection of the circuit breaker connecting bus or cable cross-section area:
Table 3 Selection of the NDM2L-400 Connecting Bus or Cable Cross-section Area

Rated current (A)	225	250	315, 350	400
Wire cross-section area (mm2)	95	120	185	240

3.2Tightening Torque of the Circuit Breaker Terminal and Mounting Screw
Table 4 Tightening Torque of the Circuit Breaker Terminal and Mounting Screw

Model	Thread diameter (mm)	Torque (N·m)
NDM2L-400	M10	20
	M6	6

3.3Derating factor of temperature change for the circuit breaker
Table 5 Derating Factor Table of Temperature Change for the Circuit Breaker

Model	Derating factor of product temperature change
NDM2L-400	Temperat ure (℃)	40	45	50	55	60	65	70
NDM2L-400	Derating factor	1	0.981	0.962	0.942	0.922	0.901	0.879

Note: 1) When the operating ambient temperature is below ﹢40℃, the product can be used normally without derating capacity.
2) The above derating factors are measured at the frame current.

3.4High-altitude derating factor of the circuit breaker

Table 6 High-altitude Derating Factor Table of Circuit Breaker

Elevation (m)	Working current correction coefficient	Power frequency withstand voltage correction coefficient	Isolation voltage correction coefficient(V)
2000	1	3500	1000
2500	1	3500	1000
3000	0.98	3150	900
3500	0.97	3000	850
4000	0.95	2800	810
4500	0.94	2650	770
5000	0.93	2500	730

4.Normal Working Environment of Circuit Breaker
1)The altitude of the installation site doesn’t exceed 2,500m. See the “High-altitude Derating Factor Table of Circuit Breaker” for the derating factor at the altitude;
2)The ambient temperature is -35℃ ~ + 70℃; the average within 24 h shall not be more
than +35℃. If the ambient temperature is higher than +40℃, the user needs to reduce the capacity. See the “Derating Factor Table of Temperature Change for the Circuit Breaker” for the derating factor;
3)Its relative humidity at an ambient temperature of +40℃ should not exceed 50%. A higher
relative humidity is allowed at a lower temperature. For example, the relative humidity at 20℃ can reach 90%; for frost due to temperature change, the corresponding measures should be taken;
4)The product can withstand the effects of wet air, salt mist, oil mist and mould;
5)The installation category of the circuit breaker connected to the main loop is: Category Ⅲ (power distribution and control level), The installation category of the circuit breaker not connected to the main loop is: Category Ⅱ (load level);
6)The pollution level is Level 3;
7)The product should be installed in places that are free from explosive media, media corrosive to metal, insulation damaging gas, and conductive dust, which should be also avoided from snow and rain;
8)In case of stricter user conditions than the above description, negotiate with the manufacturer.

5.Outline and Mounting Hole Dimensions of Circuit Breaker
5.1Outline and mounting hole dimensions of circuit breaker

Note: The limit deviation not indicated with the tolerance dimensions is as per GB/T 1804-c.

5.2Safe mounting distance of circuit breaker
Table 7 Insulation Distance Mounted in the Metal Cabinet (Unit: mm)

Mounting distance	A (inlet wire end to the cabinet face)		B (distance from side to the cabinet face)	C (outlet wire end to the cabinet face)
Model	With a terminal cover	Without a terminal cover
NDM2L-400	25	120	35	35

Table 8 Minimum Center Distance between Rowed Circuit Breakers (Unit: mm)

Model	Width of circuit breaker		I Center distance
Model	3 poles	4 poles	3 poles	4 poles
NDM2L-400	150	198	190	238

Note: Check the connected busbar or cable during rowing or stacking of the circuit breaker to ensure that the air insulation distance won’t be reduced.

Table 9 Minimum Distance between Stacked Circuit Breakers (Unit: mm)

Model	H (distance of circuit breaker from bottom)
	With a terminal cover	Without a terminal cover
NDM2L-400	155	155

Note: 1) Bare cable connection
2)Cable insulating connection
3)Connection without insulation

Requirements: Check whether the terminal cover or phase partition is assembled properly before products are energized.

SON: NDM2L—250SONRAKİ: NDM2L-630

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