PRODUCT LIST
Microcomputer Protection Device Series

Product description

SMG-300 series microcomputer integrated protection and monitoring device is suitable for the protection and control of the interval unit of 35KV and the following voltage level. It has perfect protection, measurement, control, backup power supply and communication monitoring function. It can be used for substation, power plant, Distribution and utility power system protection and control to provide a complete solution that can effectively protect the high and low voltage power grid and power system security and stability of operation. Can be and other protection, automation equipment together, through the communication interface to form the automation system. All devices can be installed in the group screen can also be installed in situ high and low voltage switchgear.

Features

○ It adopts fully sealed structure and has good anti-shock and dustproof performance

○ Small design, small size, light weight, beautiful appearance, easy to install

○ Unique reliability design, no adjustable components, good device stability, strong anti-interference

○ Chinese liquid crystal display, human-machine interface is clear and easy to understand, operation setting is extremely convenient

○ The device power supply is AC and DC

○ RS485 bus with a serial communication port, and integrates MODBLJs standard communication protocol

○ With event sequence recording function, can record 100 events, data loss is not lost

○ complete self-test function, complete exception records, event records, operation records, all information to maintain power-down

○ Small and exquisite appearance, reasonable structure, high-grade, high-quality components and multilayer technology and SMT technology to make the products have high electrical performance

○ Ultra-low power consumption

Function

SMG-300 microcomputer integrated protection and control device for 0.4-35Kv and below the voltage level to the current-based protection of the main lines, transformers, bus, capacitor protection, measurement and control. It can be dispersed in place to install, you can also focus group screen installation. And provide communication interface, and other protection, automation equipment together to form an automated system.
Line protection, outlet protection, sub-protection, feeder protection, capacitor protection, transformer protection

Technical Parameters

○ Power consumption:
○ Power supply: normal work, not dry 5w
○ When the protection action, do not dry 10W
○ AC current loop: <1VAI phase (IN = 5A) <0.5VA / phase (IN = 1A)
○ AC voltage circuit: <o.5vA phase
○ Protection accuracy:
○ setting accuracy: ≤ ± 5%.
○ Time Accuracy: ≤ ± 1% or setting time ± 35ms
○ The whole group action time: ≤ 35ms.
○ Frequency accuracy: ≤ 0.01 Hz
○ Digital input:
○ Input type: active
○ Opto-isolated input quantity: 12 channels
○ Operating voltage: AC / DC220V or DC110V universal
○ Rated technical data:
○ AC current: 5A or 1A
○ AC voltage: 100V or 400V
○ Frequency: 50Hz
○ Communication interface:
○ Number: 1
○ Electrical Characteristics: RS485
○ Transmission: Asynchronous
○ Communication protocol: MODBUS
○ Address: 1 - 110
○ Baud rate: ≤ 1Mbps
○ Rated working voltage:
○ AC, DC220V or DC11V common
○ Accurate working range:
○ Current: 0.04ln - 20ln. Voltage: 0.4V - 1.2Un
○ Frequency: 0.9Fn - 1.1Fn. Time: 0-100s
○ open contact capacity:
○ Export relay: contact rated current carrying capacity: 250VAC / 220VDC. 5A Output Type: Passive (null contact)
○ signal relay: contact rated current carrying capacity: 250VAC / 220VDC. 5A Output Type: Passive (null contact)
○ Measurement and control part accuracy:
○ AC Accuracy: ≤ ± 0.2%. Active and reactive: ≤ ± 0.5%.
Selection table
 
Function options table
 
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