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Circuit Breaker for Equipment, Oil damping product NDB3-50 J4 2P, Industrial Automatic Control

Low Voltage Product 1520

Application

NDB3-50 series circuit breaker for equipment (hudraulic-magnetic circuit breaker) is applied in electrical system, of which the rated current is from 0.5A to 63A and the rated voltage is AC230/400V, AC250V, AC480/277V (50/60Hz) or up to DC125V, to protect the circuit against the overload current and short-circuit current. It is also can be used to make and break the circuit infrequently.

It is widely used in computer, peripheral equipment, industrial automatic devices, telecommunication equipment, power supply for telecommunication, UPS equipment, railway-engine, marine electrical systems, aerospace electrical power system, elevator control systems and mobile power equipment.

NDB3-50(1) Z4(2) 40(3)/ 1(4) L (5) L(6) AL(7) A(8) 0(9)-L (10) XXXX(11)

1Frame Size50
2Tripping CurveZ2 DC short delay       J2 AC short delay
Z4 DC medium delay  J4 AC medium delay
Z6 DC long delay        J6 AC long delay
3Rated Current (A)0.5, 1, 2, 2.5, 3, 4, 5, 6, 7, 8, 9,10, 12, 15, 16, 20, 24, 25, 30, 32, 35, 40, 45, 50
4Number of Poles1. One pole
2. Two pole
3. Three poles (AC only)
5Mounting MethodL M3 screw mounting
Q Snap-in mounting
M 6-32UNC screw mounting
6Wiring MethodL M5 screw(≤50A)
H Solder- in/Q.C. tab(normal≤30A , UL489≤20A)
C Push-in stud (normal ≤50A,UL489≤30A )
F M5 screw with upturned lugs(normal ≤50A,UL489≤30A
E 8-32UNC screw(normal ≤30A,UL489≤20A)
G 10-32UNF screw (normal ≤50A,UL489≤30A)
J  8-32UNC screw with upturned lugs (normal ≤30A,UL489≤20A)
K 10-32UNF screw with upturned lugs (normal ≤50A,UL489≤30A)
P  M4 screw(normal ≤30A,UL489≤20A)
R  M4 screw with upturned lugs (normal ≤30A,UL489≤20A)
7Actuator Code S1 Black long handle, white legend, ON/OFF with current rating
S2 Black long handle, white legend, ON/OFF, I/O with current rating
S3 White long handle, black legend, ON/OFF, with current rating
S4 White long handle, black legend, ON/OFF, I/O, with current rating
S5 Yellow long handle, black legend, ON/OFF, with current rating
S6 Yellow long handle, black legend, ON/OFF, I/O, with current rating
D1 Black short handle, white legend, ON/OFF, with current rating
D2 Black short handle, white legend, ON/OFF, I/O, with current rating
D3 White short handle, black legend, ON/OFF, with current rating
D4 White short handle, black legend, ON/OFF, I/O , with current rating
D5 Yellow short handle, black legend, ON/OFF , with current rating
D6 Yellow short handle, black legend, ON/OFF, I/O , with current rating
Y1 Black rocker, vertical white legend, ON/OFF, I/O , with current rating
Y2 Black rocker, horizontal white legend, ON/OFF, I/O , with current rating
Y3 Black rocker, vertical white legend, ON/OFF, I/O
Y4 Black rocker, horizontal white legend, ON/OFF, I/O
Y5 Black rocker, vertical white legend, ON/OFF, I/O, with current rating ,indication ON
Y6 Black rocker, horizontal white legend, ON/OFF, I/O, with current rating, indication ON
Y7 Black rocker, vertical white legend, ON/OFF, I/O, with current rating, indication OFF
Y8 Black rocker, horizontal white legend, ON/OFF, I/O, with current rating, indication OFF
A1 Black flat rocker, vertical white legend, ON/OFF, I/O, with current rating, indication OFF,
handle position ”OFF” with guard
A2 Black flat rocker, vertical white legend, ON/OFF, I/O, with current rating, indication OFF
A4 Black flat rocker, horizontal white legend, ON/OFF, I/O, with current rating, indication OFF
8Actuator NumberA One per pole
B One per multi-pole(for 2-pole or 3-pole products)
9Accessory Code0 No accessory
1 With auxiliary contact (in the left side as viewed from front of breaker)
10Certificate CodeNo code CCC,TUV,CE
R CCC,TUV,CE,UL1077
L CCC, TUV,CE, UL489A(for DC product only)
I UL1500 certificate
K CCC TUV CE UL489(for AC product only)
11Customer CodeCustomer code(Additional option)
NDB3-30 Specification
Standards:GB/T 17701, IEC 60934, EN60934, UL1077, UL489A, UL489
Rated Working Voltage(Ue)DC80V, AC250V,AC415V, AC125/250, AC120/240
Power Frequency Withstand Voltage3000V(Main circuit), 1000V(Auxiliary circuit)
Mechanical/ Electrical
Endurance
10000/6000 times
Tripping ModelHydraulic-magnetic type
Parameter for Auxiliary ContactAC250V 5A
Rated Voltage (V)Rated Current (A)Number of PolesBreaking Capacity (A)
3C (GB/T 17701)UL1077UL489AUL489TUV/CE (EN60934)
DC801~301, 230003000, U1a3000/3000
30~5015001500, U1a1500
DC651~501, 2/3000, U1a///
DC321~501, 2/5000, U3///
AC2401~3014000(L, K) 3000(R, I)////
30~503000(L, K) 1500(R, I)////
AC4151~302, 34000(L, K) 3000(R, I)////
30~503000(L, K) 1500(R, I)////
AC2501~301/5000, C1a 3000, U1A///
30~501000, U1a///
AC125/2501~302/3000, U1a///
30~502000, U3///
AC250 3φ1~303/5000, U1a///
30~501000, U3///
AC1201~301///5000/
AC120/2401~302, 3///5000/

Working Condition:

  • Altitude: ≤2000m
  • Operation temperature: -40℃~+85℃
  • Humidity: ≤95%
  • Service place without explosive media, gas and dust which are corrosive and conductive.
  • Be mounted free from rain and snow

Packing and depositing

  • Maximum packing quantity:
    1-pole: 30 pieces in a box, 3 boxes in an overwrap carton.
    2-pole: 15 pieces in a box, 3 boxes in an overwrap carton.
    3-pole: 10 pieces in a box, 3 boxes in an overwrap carton
  • The products should be stored in the warehouse where there is ventilation. The
    relative humidity there should not exceed 80%, and the ambient temperature there is between
    -25℃ to +60℃. In addition, there should not be acidic, alkaline and corrosive gas in
    the air. The products should not be deposited more than 3 years in the above mentioned
    conditions since the producing date.
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