AC 2P 3P 4P 1250A MCCB Circuit Breaker 400V 680V 800V Overload Circuit Breaker
1250A Series Molded Case Circuit Breaker Performance Heat Resistant
Application
SZM1 series molded case circuit breaker (hereinafter referred to as circuit breaker) is suitable for distributingnetwork of AC 50Hz (or 60Hz), rated insulation voltage690V, rated working voltage 690V or below and ratedcurrent 1250A or below. It can be used to distribute electric energy and protect the circuit and electricequipment against overload, short circuit and undervoltage, furthermore, the circuit breakers of framesize 400A below also can protect the motor againstoverload, under voltage and short circuit. Undernormal condition, the circuit breaker also can be usedto switch the circuit and start the motor infrequently. The products are in conformity with such standards as IEC 60947-2 and GB 14048.2.
Normally, we will provide the most suitable shipment method for you. If the quantity is few, the goods will be sent by express when the payment is clear. Also, we can transport the goods by air or by sea, just according to your demand
Baikong electric was born and developed well Sichuan Baikong Electrical Technology Co., Ltd is a complete set of high and low voltage power distribution equipment automation equipment, set production, research and development and sales Import and export services and other integrated enterprises, the company is headquartered in Pengzhou Industrial Park, Chengdu City.The company's main products are box-type substation Medium and high voltage power transmission and distribution equipment, low voltage power distribution equipment, fire electrical equipment, intelligent industrial electrical equipment, new energy and energy storage electrical equipment, metering and protection power distribution equipment, high and low voltage complete switchgear, high voltage ring network cabinet, cable branch box,SF6 inflatable cabinet, etc.
Main Technical Data
| Type of circuit breaker | SZM1-63 | SZM1-125 | SZM1-250 | SZM 1-400 | SZM 1-630 | SZM 1-800 | SZM 1-1250 | SZM 1-1600 | ||||||||||||||||||||||||
| Pole | 3 | 4 | 3 | 2 | 4 | 3 | 2 | 4 | 3 | 4 | 3 | 4 | 3 | 4 | 3 | |||||||||||||||||
| Rated current | 6,10,16,20, 32,40,50,63 | 10,16,20,32,40, 50,63,80,100,125 | 100,125,160 180,200,225,250 | 250,315, 350,400 | 400,500 630 | 630,700 800 | 800,1000 1250,1600 | |||||||||||||||||||||||||
| Rated insulation Voltage | 690 | 800 | ||||||||||||||||||||||||||||||
| Rated impulse withstand Voltage | 6000 | 8000 | ||||||||||||||||||||||||||||||
| Rated working Voltage | AC400/690 | |||||||||||||||||||||||||||||||
| Breaking capacity class | L | M | L | M | H | L | M | H | L | M | H | L | M | H | L | M | H | |||||||||||||||
| Ultimate short-circuit breaking capability O-t-CO | 400V | 25 | 50 | 35 | 50 | 85 | 50 | 35 | 65 | 85 | 50 | 50 | 70 | 100 | 50 | 50 | 65 | 100 | 65 | 50 | 70 | 100 | 70 | 80 | ||||||||
| 690V | 20 | 20 | 20 | 20 | 20 | 20 | 20 | |||||||||||||||||||||||||
| Service short-circuitbreaking capebility O-t-CO-t-CO | 400V | 18 | 30 | 22 | 35 | 43 | 35 | 22 | 42 | 43 | 30 | 35 | 40 | 50 | 30 | 35 | 50 | 65 | 50 | 35 | 37.5 | 50 | 37.5 | 50 | ||||||||
| 690V | 10 | 10 | 10 | 10 | 10 | 10 | 10 | |||||||||||||||||||||||||
| Flashover distance | 50 100 | |||||||||||||||||||||||||||||||
| Operation cycle /Time | Per hour | 120 | 60 | 60 | 20 | |||||||||||||||||||||||||||
| Power on | 4000 | 3000 | 1500 | 1000 | 1000 | 500 | ||||||||||||||||||||||||||
| Power off | 6000 | 7000 | 6500 | 4000 | 4000 | 2500 | ||||||||||||||||||||||||||
| Power loss | Fixing type | 20 | 25 | 33 | 35 | 40 | 40 | 26 | 63 | 55 | 60 | 60 | 40 | 80 | 80 | 40 | 120 | 130 | 150 | 150 | 200 | 125 | 135 | 180 | 240 | |||||||
| Insertion type | 25 | 30 | 40 | 50 | 50 | 65 | 75 | 75 | 100 | 110 | 180 | 200 | 200 | 170 | 190 | 300 | ||||||||||||||||
Tripping modes and accessory code
External And Installation Size
| Type | Pole | Outline size | Insiallalion size | connection size | |||||||||||
| L | | L1 | W | H | H1 | H2 | a | b | ∅d | a1 | b1 | d1 | H3 | H4 | ||
| SZM1-63L | 3 | 135 | 21 | 76 | 89.5 | 74 | 21 | 25 | 117 | 3.5 | 25 | 117 | 18 | 52 | 75 |
| SZM1-63M | 99 | 82 | 28 | ||||||||||||
| SZM1-63L | 4 | 103 | 50 | ||||||||||||
| SZM1-125L | 3 | 150 | 51 | 90 | 87 | 68 | 25 | 30 | 129 | 4.5 | 30 | 132 | 22 | 65 | 100 |
| SZM1-125M | 103.5 | 84 | 24 | ||||||||||||
| SZM1-125H | |||||||||||||||
| SZM1-125 | 4 | 122 | 60 | ||||||||||||
| SZM1-250L | 3 | 165 | 64 | 107 | 110 | 87 | 25 | 35 | 126 | 4.5 | 35 | 144 | 24 | 70 | 110 |
| SZM1-250M | 126 | 104 | 24.5 | ||||||||||||
| SZM1-250H | |||||||||||||||
| SZM1-250 | 4 | 142 | 70 | ||||||||||||
| SZM1-400 | 3 | 257 | 105 | 150 | 146 | 106 | 36.5 | 44 | 194 | 6.5 | 44 | 225 | 32 | 70 | 120 |
| 4 | 200 | 90 | |||||||||||||
| SZM1-630 | 3 | 270 | 118 | 182 | 160 | 112 | 41 | 58 | 200 | 7 | 58 | 234 | 40 | 70 | 120 |
| 4 | 240 | 115 | |||||||||||||
| SZM 1-800 | 3 | 280 | 102 | 210 | 146 | 108 | 34.5 | 70 | 243 | 7 | 70 | 243 | 48 | 75 | 125 |
| 4 | 280 | 140 | |||||||||||||
| SZM1-1250 | 3 | 470 | 104 | 210 | 190 | 140.5 | 58.5 | 70 | 375 | 10 | |||||
Our MCCBs provide you unmatched circuit protection in alternative energy, commercial, industrial, mining, and military applications when protecting conductors against overloads and short circuits.
These circuit breakers are applied in panelboards, switchboards, motor control centers, control panels, combination starters, individual enclosures, and bus duct plug-in units.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.