Home ꄲ Low-voltage protection device ꄲ Motor protection controller ꄲ ST570LF series motor protection controller

ST570LF series motor protection controller

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1)Device Overview

ST570LFseries combined electrical fire monitoring detector device isa protection of the main body and display module integrated device, suitable for rated frequency 50/60Hz, rated voltage below 1kV motor circuit applications.At the same time, the device is also aimed690Vthe followingTT,TNsystem design, through the distribution circuit of the residual current and temperature of electrical fire hazard parameters to implement monitoring and management, so as to prevent the occurrence of electrical fires, is the ideal choice for chemical enterprise electrical fire prevention monitoring. The device consists of a protective body (including display),special current transformer,consists of residual current transformer, temperature sensor and other parts. The main body of the device protection is installed on the cabinet panel, and the rest is 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 "2.3 Current Transformers" in this chapter for current transformers ".

3)technical parameters

Analog Input Loop

transformer rated current In	1A, 5A, 25A, 100A, 160A, 400A
Rated voltage Un	AC380V/400V
frequency F	50/60Hz
Rated residual current I △n	1A
current circuit	2incontinuous operation; 10In is allowed to operate for 10s; 40Inis allowed to run for 1s
voltage circuit	1.2UnContinuous operation; 1.4Un is allowed to operate for 10s
power consumption	No current, voltage <1VA/phase

Measurement range and accuracy

Name		accuracy
current I	0.5~1.2 In	≤±0.5%In or 0.0025A
voltage U	0.5~1.2 Un	≤±0.5%Un
active power P	\|Cosφ\|≥0.707 U/Un=(50~ 120)% I /In=(50~ 120)%	≤ ± 0.5%
Electrical EP/EQ		≤±0.2kWh/kvarh
frequency F	45to 65Hz	≤ ± 0.05Hz
power factor COS	\|Cosφ\|≥0.707	≤ ± 0.5%
Residual current I △	50~ 1000mA	≤± 1%
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%
temperature	0~ 140 ℃	≤ ± 1 ℃

protection action accuracy

Current/voltage fixed value		≤ ± 3% fixed value
heat accumulation		≤ ± 5%
Thermal overload time		≤ ± 5% or ± 50ms
t_Etime		≤ ± 3% or ± 50ms
Time-limited protection delay time T	T<4S	≤ ± 20ms
Time-limited protection delay time T	T≥ 4s	≤ ± 1% fixed value or ± 20ms
return coefficient	Overprotection	<0.95 percentfixed value
return coefficient	underprotection	>1.05 percentfixed value
residual current	300~ 1000mA	≤ ± 1mA
temperature	45~ 140 ℃	≤ ± 1 ℃

Auxiliary power supply

power supply voltage (both AC and DC)	AC 85~264V,DC 90~300V
power consumption (normal/protected)	≤ 3W / 5W
surge current	≤ 20A
working power supply	2S

switch input (standard 8)

isolation method	optical isolation
Power supply mode	Built-in DC24V
response time	≤ 50ms

relay output (standard 4 way)

R1, R2, R3	AC250V 10A,DC30V 10A
R5	AC250V 5A,DC30V 5A

analog (4 ~ 20mA) transmission output

transmission parameters

three-phase current, three-phase voltage,

leakage current, active power

Load resistance

≤ 750Ω

communication function

Modbus-RTUStatute	1/2channel, RS485 interface, terminal access
Modbus-TCPStatute	2channel, Ethernet interface, RJ45 access
PROFIBUS-DPV0Statute	1way, PROFIBUS interface, DB9 access

Alarm function

Alarm mode	Audible and visual alarm
Alarm Record	16alarm records
audio device	70~115dB

work environment

working temperature	-25~ 60 ℃
storage temperature	-25~ +70 ℃
relative humidity	5~ 95% (no condensation or ice inside)
altitude	<3000m
IPlevel	≥ IP20 (Panel ≥ IP40)

4)Contour Installation

Device Body

are: 103.0mm × 64.5mm × 122.0mm (length, width and depth), and the opening dimensions of the panel are: 87.5mm × 51.0mm (length and width).

Installation Method

device is to install the buckle to fix the opening of the panel, install the four buckles along the grooves at the four corners of the device, and push them forward tightly, so that the front end is squeezed on the cabinet body, so that the device is installed.

5)Terminal Arrangement

6)Terminal Definition

7) Typical Wiring

Product Details

ꄴThe previous one： ST570B3 series motor protection controller

ꄲThe latter one： ST570B1 series motor protection controller

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