SDB-3250 digital motor integrated protector

Main function

Product purposes

SDB - 3250 digital integrated motor protector is dedicated to

the coal mine 380 v, 660 v and 1140 v power supply system,

with under 250 a mining flameproof magnetic starter, realize

the comprehensive protection of the motor intelligent

protection device and network communications.

SDB - 3250 digital motor integrated protector has many

advantages such as low power consumption, small volume,

complete function, easy to use, stable performance, reliable

work and long life. It can completely replace the old

protectors such as JDB and ABD8, which are the

replacement products of JDB and ABD8. The sdb-3250

digital motor integrated protector is used to improve the

function of the magnetic starter and to protect more

accurately.

SDB-3250 digital motor integrated

protector

Executive standard

The protective device is designed and produced by the

electronic protectors of the mt175-1998 mine isolation type

electromagnetic starter. Some functions and indicators are

better than the requirements in the standard.

(1) short circuit protection (2) plugging protection (3) long

time starting protection (4) overload protection (anti-timing)

(5) lack of phase protection (6) three-phase unbalance

protection (7) leakage (grounding) (8) overvoltage

protection/blocking

(9) under-voltage protection/lock (10) overtemperature alarm

(11) short circuit test (12) leakage test

Product features

Fully functional motor protection

Protector with digital circuit and single-chip microcomputer

technology design, with high precision data processing and

advanced protection algorithm, realization of short-circuit,

overload, locked-rotor, long starting, imbalance of three

phase current, phase, overvoltage, undervoltage, electric

leakage blocking all functions such as motor protection.

MODBUS communication interface

Communication interface with essential performance,

MODBUS communication protocol, convenient access to

mine network, all operational data and status can be

uploaded via communication interface. The operation of

remote setting and remote control can also be realized to

realize the monitoring of the lowest level equipment of the

mine.

48 incident records

Protector record 48 banding time scale of the latest events,

may at any time protector motion event query, which has

made great fault handling and screening, at the same time

provide more information and basis for accident analysis.

Compatible early products

One-piece chassis, built-in current transformer, compact

structure, convenient installation. The appearance size and

installation method are consistent with the early motor

protectors such as JDB and ABD8, which can be replaced

directly to facilitate user transformation and upgrading.

Wide range setting current

The rated current covers a range of 5 ~ 250A, which

satisfies the application of magnetic starter for various

specifications such as 80A, 120A and 225A. The current

setting differential reaches 0.1 A, achieving precise setting.

LCD displays Chinese menu

Protector is equipped with 128 * 64 LCD display, Chen

Chinese multilayer menu human-computer interaction

interface, it can display the run data, running state and fault

state, the current time, such as data, display information is

complete.

2 Programmable signal input

2 road isolation of programmable switch signal input

interface, and, according to the requirements of network

running state feedback signals, external chain and unlock

signal, realize power operation state display, safety chain and

fault unlock and various control functions.

Built-in built-in battery

The protective device has a built-in battery, which has the

backup battery to support the function, which can support the

continuous backup time of not less than 30min.

The circuit supplied by this battery is designed by benan.

After the power is off, open the outer shell for querying and

setting.

Built-in temperature sensor

The protective device has a built-in micro temperature

sensor which can measure and display the internal

temperature of the cavity, and can detect the excessive

temperature in the cavity caused by all kinds of anomalies,

and send out the alarm information in time.

Auto sleep

When the protector is powered by a backup battery, it can

automatically sleep and extend the backup support time to

the maximum, automatically activated when pressing any key

or on the power.

 

 

Technical parameters

 

Rated input voltage：AC36V  50Hz                 

Allowable voltage fluctuation：60～120%                      

The power consumption of the largest：3W                     

Output interface capacity：AC250V/7A  DC28V/7A            

Setting current range：5～250A                                      

Protective current range：0～2500A

Resistance measurement range：-25～+125℃        

Communication interface：RS485 MODBUS RTU          

Battery support time：≥30minutes（consecutively）Event record number：48 (time scale)