ALP intelligent low voltage line protector
General
ALP200, ALP220 and ALP320 series intelligent low line protectors (hereinafter referred to as ALP) apply to low-voltage system with rated voltage to AC 600V, rated current to AC 400A and rated frequency of 50/60Hz. The product is small in volume, compact in structure and convenient in installation, which is intelligent integrated unit for protecting, monitoring and controlling low voltage feeder terminal.
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.
Dimension
Technical parameter
|
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
|
√
|
