- Overview
- Product Description
- Product Parameters
- Certifications
- Company Profile
- Packaging & Shipping
- FAQ
Basic Info.
Product Description

ALP series products have integrated protection, measurement, control and bus communication into one and provided remote auto control, site direct control, panel indication, signal alarm, operation record, trip alarm record and switch quantity record and other functions, applying to coal mine, petrifaction, smelting, electricity, ship and civil architecture and other fields.

Protection function | Inverse time over current protection | √ |
Low definite-time over current protection | √ | |
High definite-time over current protection | √ | |
Low definite-time zero sequence protection | √ | |
High definite-time zero sequence protection | √ | |
Inverse time zero sequence protection | √ | |
Open-phase protection | √ | |
Unbalance protection | √ | |
Current demand protection | √ | |
Linkage 1 protection | √ | |
Linkage 2 protection | √ | |
Linkage 3 protection | √ | |
Undervoltage protection | √ | |
Overvoltage protection | √ | |
Leakage protection | √(Optional) | |
Communication function | ModbusRTU RS485 interface communication protocol | √ |
Switch input | Switch input DI (ALP200, ALP220 support 5-circuit DI, ALP320 support 9-circuit DI) | √ |
Relay output | Switch output DO (ALP200, ALP220 support 4-circuit DI, ALP320 support 5-circuit DI) | √ |
Analog output | 1-circuit DC4-20mA | √(Optional) |
Record | 8 failure records; the failure cause,time, parameters of circuit during failure are recorded | √ |
Measurement display | Triple-phase line voltage (ALP220, ALP320 support.Display phase voltage in three-phase four-wire system), power, power factor, electric energy) | √ |
Definite value setting | Query of various protection definite values Setting of various protection definite values | √ |
Setting of various protection definite values | √ |



Q:Where is your company located?
A:Our headquarter is in Shanghai, our factory locates in Jiangyin,Jiangsu Province,China.
It takes about 1 hour by car from Shanghai Hongqiao International Airport to our factory
Q:What's your lead time?
A:Sample time 1-3days,mass production 10~20days for order more than 500pcs
Q:Payment terms?
A:Usually,TT,credit card,western union,in cash and so on.You can also choose to pay 30% as deposit and the balance before shipment.
Q:What certifications do you have ?
A:We have ISO9001,IEC,CE and so on.
Q:Can other logo be put on your products(OEM)?
A:Yes,but MOQ for OEM will be at least 100pcs.We also need you provide logo Ai Format or EPS.