ST570B1 series motor protection controller

ST570B1-1
ST570B1-4
ST570B1-3
ST570B1-2
넳 넲
Device Introduction
Low-voltage protection device (including ST570B1 series motor protection control
Controller, ST420B1 series microcomputer line protection device) is suitable for rated frequency 50/60Hz, rated voltage below 1kV low voltage motor or feeder circuit applications. The device integrates protection, measurement, control, management and communication, and cooperates with contactors, soft starters, frequency converters, circuit breakers, etc. to realize a variety of control schemes f

1) Device Overview

ST570B1series motor protection controller is a protection of the main body (including display) and display module integrated device, suitable for rated frequency 50/60Hz, rated voltage 1kV motor circuit applications. The device is composed of protection main body (including display), special current transformer, zero sequence current transformer and other parts. The protection main body of the device is installed on the cabinet panel, and the other parts are installed in the cabinet.

2) Device model

Note:

1) Standard 1 channel Modbus-RTU communication and WiFi function;

2)AC660V/690V circuit application shall be specified when ordering;

3)See current transformer in this chapter"2.3current transformer";

4)N: Expand one open (R2) one closed (R6) two relays.

3) Technical parameters

Analog Input Loop

transformer rated current In

1A, 5A, 10A, 25A, 100A, 160A

, 400A

Rated voltage Un

AC380V/400V

frequency F

50/60Hz

Rated leakage current I △n

1A, 5A, 30A

current circuit

2incontinuous operation; 10In is allowed to operate for 10s;

40In allows running for 1s

voltage circuit

1.2Un works continuously; 1.4Un is allowed to run for 10s

power consumption

No current, voltage <1VA/phase

Measurement range and accuracy

Name

tolerance

current I

0.5In~1.2In

≤±0.5%In

voltage U

0.1Un~1.2Un

≤±0.5%Un

Active power P Electrical degree EP

|Cos&phi;|≥0.707 U/Un=(50~120)%

I /In=(50~120)%

≤ ± 1%

power factor COS

|Cos&phi;|≥0.707

≤ ± 1%

Leakage current I △

0.5I△n~1.2I△n

≤±1%I△n

current harmonics

Ih/In=(5~50)%

I /In=(50~120)%

≤±1%In

voltage harmonics

Uh/Un=(5~50)%

U/Un=(50~120)%

≤±1%Un

analog output

4 ~ 20mA

≤ ± 0.5%

protection action accuracy

Current/voltage fixed value

≤ ± 3% fixed value

heat accumulation

≤ ± 5%

tEtime

≤ ± 3% or ± 50ms

Delay time T

T<4s

≤ 35ms

T≥4s

≤ ± 1% fixed value

return coefficient

Overprotection

<0.95% fixed value

underprotection

>1.05% fixed value

Auxiliary power supply

power supply voltage (both AC and DC)

AC 85~264V,DC 90~300V

power consumption (normal/protected)

3W / 5W

switch input (standard 5)

isolation method

optical isolation

Power supply mode

Built-in DC24V

response time

≤ 50ms

relay output (standard 3 channels, additional 2 channels R2 and R6) analog quantity (4-20mA)transmission output

END

Product Details

ꄴThe previous one： ST570LF series motor protection controller
ꄲThe latter one： ST570S Intelligent Motor Management System

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