Tiêu chuẩn IEC 60947-2, UL 489 – NDB2T-63 3P

Key Specifications/ Special Features:

Applicable scope and purpose

● Short -circuit protection

● Over-load protection

● Control

● Isolation

● DC system protection

NDB2T-63 (UL489) được thiết kế dành riêng cho hệ thống phân phối điện áp thấp trong các lĩnh vực công nghiệp, tòa nhà, năng lượng, viễn thông và hạ tầng.

Main technical specification

● Electrical parameters

○ Rated working voltage and relevant breaking capacity:

Pole		1P	2P	3P	1P	2P	3P
Rating current		1~32A			35~63A
Item		Icu
Voltage	AC 120V	10kA	—	—	10kA	—	—
	AC 240V	—	10kA	10kA	—	10kA	10kA
	AC 277V	10kA	—	—	—	—	—
	AC 480Y/277V	—	10kA	10kA	—	—	—
	DC60V	10kA	10kA	—	10kA	10kA	—
	DC125V	—	10kA	—	—	10kA	—

○ Impulse withstand test voltages: 4kV

○ electrical endurance: 10000 times；Mechanical endurance: 20000 times

●  Product certification and implementation standard.：

○ Product certificate：UL489;

○ Product certification standard：UL489;

●  Environmental requirements：RoHS

●  Isolation function

○ Practical breaking instructions

○ View window within the green identification said contact in the off position

●  Tripping characteristic B type curve

○   Protection of short circuit current small load

○   rated current：1A～63A

○   tripping characteristic：The instantaneous tripping range 4In（1±20%） C type curve

○  Protect normal load and distribution wire cable

○   rated current：1A～63A

○   tripping characteristic：The instantaneous tripping range 8In（1±20%） D type curve

○   Protect starting current big impact load（Such as motor, transformer）

○   rated current：1A～63A

○   tripping characteristic：The instantaneous tripping rang 12In（1±20%）

5、Normal working environment

● Ambient temperature：-40℃～+70℃

● Air relative humidity：≤95%

● Altitude：≤2000m

● pollution degree: 3

● Service place without significant vibration and impact

● Lower capacity coefflcient table above 2000 meters above sealevel

● Side-by-side volume reduction coefflcient table

6.  Tripping characteristic

7、Outline dimensions

                                                                   3P

8、Mounting

Modular construction，can be installed in EN60715 TH 35mm x 7.5mm standard guide rail.

9、Connect line requirements

^{○    Standard cross-sections of round copper conductors: 1~35mm2}

○  Terminal screw: M5 ,Rated torque : 2.0N.m

11 、 Notice

1、Customers who disassemble the product without approval shall undertake relevant quality problems by themselves;

2、Do not touch the naked part of conductive components when the product is power on;

3、Don’t test characteristics of the breaker optionally, the manufacturer is irresponsible for such quality problems;

4、Keep wiring correct to prevent malfunction or damage of wiring terminals.

5、Please open the cover when installing the accessory. Please refer to OF2, SD2, MX+OF2 Instruction for details.