| Application | It is used to conduct mechanical and electrical life tests on
miniature molded case circuit breakers to assess whether the
circuit breaker will experience excessive wear after 4,000
operating cycles, the position of the moving contact is
inconsistent with the corresponding position of the indicating
device, and the casing is damaged enough to be tested. Access to
live parts, loose electrical and mechanical connections, leakage of
sealing compounds, etc. to determine compliance with the standard |
| Test principle | This testing machine adopts PLC touch screen independent control
system to complete the automatic control of the test product. The
action mechanism cooperates with the load on-off to realize the
durability operation test of the test product. It can complete the
statistical summary of the number of tests, and the closing time
and opening time can be set. |
| Equipment structure and characteristics | 1. The equipment box adopts the overall high-quality steel
integrated chassis, spraying the sealing plate, and the surface is
anti-static, anti-rust and anti-corrosion spraying; 2. The right panel and operation buttons of the equipment are easy
to use and beautiful in appearance. 3. The equipment is equipped with a protective box, and the test is
carried out in the box for safety protection; 4. The equipment can be connected to external loads to realize the
electrical life test of the product, 3-station independent current. |
| Use environment | Load cabinet: AC380V±10% 50Hz, 15kVA, Life testing machine: AC380V±10% 50Hz, 3kVA Working temperature 0-40℃ Humidity 30%-90%; |
| Performance |
| Model | SN2503 |
| Electrical control method | PLC intelligent integrated control, man-machine touch interface
operation |
| Test box | The test box is combined with the test machine, with built-in
three-station delay, and is arranged on the back panel by means of
binding posts, which can meet the test of 1-4P circuit breaker. |
| Test mode | Mode 1: Circuit breakers with rated current not exceeding 32A: The operating frequency is 240 operating cycles per hour (4
times/min). The circuit breaker shall remain open for at least 13
seconds during each operating cycle. Mode 2: Circuit breaker with rated current greater than 32A: The operating frequency shall be 120 operating cycles per hour (2
times/min). The circuit breaker shall remain open for at least 28
seconds during each operating cycle. Mode three, custom Mode 1 and mode 2 can directly call the program, and mode 3 is for
the customer to set parameters by himself |
| Tested specimen | Miniature circuit breakers, 1 or 2 or 3 or 4 poles, 3-125A |
| Life testing machine parameters |
| Test station | 3station |
| Opening and closing method | electric |
| Contact detection function | It can detect whether the contact is connected when closing,
whether the contact is disconnected when opening, and can alarm and
stop when there is a defect |
| Closing time setting | 1~999.9s,touch screen presets |
| Opening time setting | 1~999.9s,touch screen presets |
| Opening and closing times setting | 1-999999,touch screen presets |
| Opening/closing speed | 0.1m/s±0.025 m/s |
| Test frequency | 1-4 times/min |
| Specimen installation | MCB mounted on dark black plywood painted 20mm thick |
| Clamping fixture | The height range can be adjusted up and down to match the different
strokes of the sample switch
|
| Protective function | Overvoltage, overcurrent, short circuit |
| Judge | Sound and light alarm device prompts (remind the operator in time
during the test or when unqualified test products appear) |
| Dimensions of life machine | Length 1200*width 780*height 1600mm, about 180kg |
| Main technical parameters of load cabinet |
|
| Test sample range | 3~125A |
| Output current | AC5~130A, accuracy ±0.5%, digital display |
| The output voltage | AC220~420V, accuracy ±0.5%, digital display |
| Power factor | 0.85～0.90, accuracy ±0.5%, digital display |
| Output Power | 0～60KW, accuracy ±0.5%, digital display |
| Number of output current channels | 1 output, multi-P circuit breaker contacts are connected in series
to test several switches; (time-sharing supply of 3-way samples) |
| Current output waveform | Sine wave (correction equipment current waveform distortion is not
more than 5%, system error is not more than 3%) |
| Current control method | Manual knob adjustment |
| Overall dimensions | Length 1200*width 780*height 1800mm, about 400kg |
