Featured CategoriesCircuit Breaker for Equipment, Oil damping product NDB3-50 J4 2P, Industrial Automatic Control
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)
| 1 | Frame Size | 50 |
| 2 | Tripping Curve | Z2 DC short delay J2 AC short delay Z4 DC medium delay J4 AC medium delay Z6 DC long delay J6 AC long delay |
| 3 | Rated 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 |
| 4 | Number of Poles | 1. One pole 2. Two pole 3. Three poles (AC only) |
| 5 | Mounting Method | L M3 screw mounting Q Snap-in mounting M 6-32UNC screw mounting |
| 6 | Wiring Method | L 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) |
| 7 | Actuator 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 |
| 8 | Actuator Number | A One per pole B One per multi-pole(for 2-pole or 3-pole products) |
| 9 | Accessory Code | 0 No accessory 1 With auxiliary contact (in the left side as viewed from front of breaker) |
| 10 | Certificate Code | No 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) |
| 11 | Customer Code | Customer code(Additional option) |
| Standards: | GB/T 17701, IEC 60934, EN60934, UL1077, UL489A, UL489 |
| Rated Working Voltage(Ue) | DC80V, AC250V，AC415V, AC125/250, AC120/240 |
| Power Frequency Withstand Voltage | 3000V(Main circuit), 1000V(Auxiliary circuit) |
| Mechanical/ Electrical Endurance | 10000/6000 times |
| Tripping Model | Hydraulic-magnetic type |
| Parameter for Auxiliary Contact | AC250V 5A |
| Rated Voltage (V) | Rated Current (A) | Number of Poles | Breaking Capacity (A) | ||||
| 3C (GB/T 17701) | UL1077 | UL489A | UL489 | TUV/CE (EN60934) | |||
| DC80 | 1~30 | 1, 2 | 3000 | 3000, U1a | 3000 | / | 3000 |
| 30~50 | 1500 | 1500, U1a | 1500 | ||||
| DC65 | 1~50 | 1, 2 | / | 3000, U1a | / | / | / |
| DC32 | 1~50 | 1, 2 | / | 5000, U3 | / | / | / |
| AC240 | 1~30 | 1 | 4000(L, K) 3000(R, I) | / | / | / | / |
| 30~50 | 3000(L, K) 1500(R, I) | / | / | / | / | ||
| AC415 | 1~30 | 2, 3 | 4000(L, K) 3000(R, I) | / | / | / | / |
| 30~50 | 3000(L, K) 1500(R, I) | / | / | / | / | ||
| AC250 | 1~30 | 1 | / | 5000, C1a 3000, U1A | / | / | / |
| 30~50 | 1000, U1a | / | / | / | |||
| AC125/250 | 1~30 | 2 | / | 3000, U1a | / | / | / |
| 30~50 | 2000, U3 | / | / | / | |||
| AC250 3φ | 1~30 | 3 | / | 5000, U1a | / | / | / |
| 30~50 | 1000, U3 | / | / | / | |||
| AC120 | 1~30 | 1 | / | / | / | 5000 | / |
| AC120/240 | 1~30 | 2, 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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