FAQ
Can your equipment be installed in hot weather?
Yes, our products have passed the 40℃ high temperature operation test.
Can your products be installed in cold weather?
Our products support -40°C extreme cold deployment.
Can I buy just a few spare parts from you?
Spare parts can be ordered from 1 piece, but attention should be paid:Standard parts: warehouse stock 48 hours delivery (DHL to pay)Discontinued parts: 50% mold restart fee is required.
Can you design the equipment according to our dimensions?
Size tolerance: ±0.5mm (CAD drawings required)
Mold cost: the first order ≥ 500 pieces can be reduced.
How many years has your company been making this equipment?
10 years of professional manufacturing experience:
2016: first circuit breaker production line put into operation.
What certificates do you have for your equipment?
It conforms to all main worldwide standards, including UL/IEC/CE/CCC/ISO9001.
How many employees do you have in your factory?
50+ professional team configuration:
R&D Center: 5 people
Quality control department: 5 people
Production team: 35 people.
Where is your factory located?
UNIT7, 10/F. TOWER 1, CHINA HONGKONG CITY, 33 CANTON ROAD, TSIM SHA TSUI, HONGKONG
Do you have detailed and professional installation manual?
Of course, each of our products comes with an installation manual.
Can you take OEM?
Of course, we provide three-level OEM service:
Silk-screen customization: free (need ≥ 100 pieces)
Structural modification: ￥3000 onwards (shared intellectual property rights)
Full private model: ￥50,000 development fee (exclusive patent).
Do you offer samples? Free or for a fee?
Certified customers: first sample free (payable on delivery)
New customers: pay 50% of the sample fee (return of large orders)
Urgent needs: expedited fee of ￥200 / single (24 hours delivery).
What is your term of payment?
New customer: 30% deposit + 70% see copy of bill of lading
VIP customers: Net 60 account period (annual purchase ≥ ¥1 million)
Project system: LC forward letter of credit (accept 180 days).
What is the MOQ?
Standard item: 1 piece
Customized pieces: 50 pieces (can be produced in a single order)
Special process: 100 pieces required.
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Is there a step discount for bulk purchase of surge protectors?
Tiered discounts based on annual purchases:
50-100 pieces: 5% discount
100-500 pieces: 8% discount
500+ pieces: 12% discount.
What are the limitations of screen printing on OEM molded case circuit breaker enclosures?
Customization range is allowed:
Brand LOGO (need to provide vector drawing)
Rated parameter font (in accordance with IEC 60417 standard)
Prohibited modifications: UL / EAC certification mark position.
Can SASO certification in the Middle East be handled on behalf of?
All-inclusive service:Fee:
Product price + 15% certification service fee
CycleTime: 25 working days (including Saudi energy efficiency testing)
Guarantee: Full refund if certification fails.
How to choose SPDs for solar systems vs industrial plants?
Consider these 3 factors:
Clamping Voltage: <600V for solar (UL 1449 Type II), <1.5kV for heavy machinery
IEC Class: Class I (lightning protection) vs Class II (equipment protection)Remote Monitoring: IoT-enabled SPDs with SNMP alerts.
What's the lifespan of MOV-based surge protectors?
Typical 8-12 years under <15 surges/year. Use our Surge Counter Adapter (sold separately) to monitor degradation.
Can MCCB 250A replace old fuse systems in commercial buildings?
Yes, if:
Icu ≥ 35kA (per NEC 240.83)
Space: Our Compact MCCB Line saves 40% panel space vs fuses.
How to prevent nuisance tripping in motor loads?
3-step solution:
Select MCCB with K-rated (harmonic immunity)
Set Ir = 125% of FLA (Full Load Amps)
Add Thermal Overload Relay.
Can ATS synchronize generator with grid-tied solar?
Yes, using our Hybrid ATS Controller:
THD <3% for seamless synchronization
UL 1008 & IEEE 1547 compliant.
Why choose ACB over MCCB for main distribution?
When you need:
Breaking Capacity: Up to 150kA vs MCCB’s 85kA
Adjustable Settings: Digital trip units with 0.1A increments
Condition Monitoring: Built-in thermal sensors.
How to retrofit old ACBs with smart trip units?
Our Plug-in Digital Upgrades feature:
Energy Metering (kWh, PF, harmonics)
Predictive Maintenance Alerts
Modbus RTU/TCP connectivity.
How do data center rack mount SPDs cascade with distribution cabinet main SPDs?
Recommended 80% rule: main SPD discharge energy ≥ 5 times that of rack SPDs, spacing ≥ 10 meters cable to decouple.
How to diagnose leakage current problems due to SPD failure?
Three-step detection method:
① infrared thermal imaging to locate hot spots
② insulation resistance tester to measure the resistance between the wires
③ replacement method verification.
How do I adjust the MCCB current rating in a high temperature shop (50°C+)?
How do I adjust the MCCB current rating in a high temperature shop (50°C+)?
How is the ATS linked to the diesel generator start/stop logic?
Loss of utility voltage → 2) ATS cut to generator side → 3) 0-10 sec delay to start generator → 4) ATS closed after steady state.
Can a dual power ATS be connected to a third UPS?
Need to use three sources of interlocking ATS: priority utility → UPS → generator, blocking switching time difference <50ms.
How can I prevent the ATS from switching incorrectly when the phase is not synchronized?
Synchronized detection module requirements:
Voltage difference＜±5%
Frequency difference＜±0.2Hz
Phase angle difference <±5°.
Difference in requirements for distribution cabinets between ACB drawer type and fixed installation?
Comparison of key parameters:
Type: Ease of maintenance, seismic rating, space requirements
Drawer type: No power failure for replacement, IEC 60068-3-3, 20% deeper
Stationary: 30% lower cost, Class 9 vibration rating, compact design.
How does ACB achieve Modbus TCP integration with power management systems?
Three-step docking:
Configure the ACB communication address (1-247)
Import device EDS file to SCADA system
Map registers 40200-40215 electrical energy data.
What EMC tests are required for ACBs for rail transit?
Mandatory test items:
EN 50121-3-2 (Electromagnetic radiation for railroads)
IEC 61000-4-5 (surge immunity)
Vibration test ≥5Grms.
How to build a hospital level distribution system with SPD+ATS+ACB?
Topology Diagram Highlights:
ACB main switch set for short delay protection
SPD is installed on the load side of ACB
Distance between ATS and emergency power supply ≤ 30 meters.
Coordinated protection timing of each circuit breaker in a PV + energy storage system?
Time grading principle:
ACB: 300ms delay
MCCB: 100ms
Fuse: <10ms.
How do you mix old and new circuit breakers in an old plant retrofit?
Three principles of safe mixing:
Upper level circuit breaker Icu must be ≥ lower level
Priority of the same brand (to avoid conflict of disconnecting curves)
Add arc fault detection module.
How to achieve demand charge optimization with smart circuit breakers?
Strategy Example:
Monitor loads in real time
Cutting off non-critical loads 5 minutes before peaks.