WLD-650 Series Intelligent Integrated Protection Device Microcomputer Programmable Protection And Supervision Device

WLD-650 Series Intelligent Integrated Protection Device Microcomputer Programmable Protection And Supervision Device插图

WLD-650 Series Integrated Protection Device Microcomputer Programmable Protection And Supervision Device

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Description

WLD-650 Intelligent integrated protection device is a protection, measurement and control system for transmission and distribution components and lines of 35kV and below voltage level, which is based on the company’s accumulated years of research and development, production of microcomputer protection and control device, and after a lot of market research and configuration scheme demonstration. It can be applied to ring main unit, central unit, etc. It adopts 5-inch LCD color display screen with super clear and high resolution, which can display a simulation system diagram in real time.

According to different protected equipment and protection requirements, various models and functions of wld-650 series are as follows：

  1. WLD-650 – General protection unit, suitable for line, transformer, capacitor, motor, bus protection.
  2. WLD-611-pt parallel unit is suitable for protection, measurement and control of voltage transformer and Pt parallel.
  3. WLD-621 – bus tie protection and integrated automatic backup switching unit, applicable to automatic backup switching of incoming line or sectional automatic backup switching.

Function configuration table of wld-650 series microcomputer protection and control device:

Main technical specifications

1.1.1 work environment

  1. a) Normal temperature: – 10 ℃ ~ 55 ℃.
  2. Limit temperature: – 25 ℃ ~ 70 ℃。
  3. Relative humidity: ≤ 95%, non condensing。
  4. Atmospheric pressure: 80-110kpa。

 

1.1.2 Rated working power supply

Voltage range: 85 ~ 264v (AC or DC), DC24V or DC48V must be indicated when ordering。

 

1.1.3 Rated AC parameters

  1. Rated current: 5A (rated current of 1A must be indicated when ordering）
  2. Rated voltage: 100V (line voltage) or 57.74v (phase voltage）
  3. Frequency: 50 Hz。

 

1.1.4 Power consumption

  1. Power consumption of working power: normal power consumption: less than 5W; maximum power consumption: less than 10W。
  2. Power consumption of AC current circuit: less than 1va per phase。
  3. Power consumption of AC voltage circuit: less than 0.5va per phase。

 

1.1.5 Overload capacity

  1. AC current circuit: 2 times of rated current, continuous operation, 10 times of rated current, 10s allowed, 40 times of rated current, 1s allowed。
  2. AC voltage circuit: 2 times of rated voltage, continuous operation。

 

1.1.6 Output contact capacity

  1. Tripping and closing contact capacity: in the DC inductive load circuit with voltage no more than 250V, current no more than 1a and time constant L / R of (5 ± 0.75) ms, the contact breaking capacity is 50W, and the long-term passing current is not more than 5A。
  2. Contact capacity of signal outlet: in DC inductive load circuit with voltage no more than 250V, current no more than 0.5A and time constant L / R of (5 ± 0.75) ms, contact breaking capacity is 30W, and long-term current no more than 3a is allowed。

 

1.1.7 measurement accuracy

  1. measurement accuracy
  2. Voltage and current: grade 0.5
  3. Frequency: 0.02hz
  4. P、Q、COSΦ: 1 level
  5. Remote signal resolution: < 2ms

 

1.1.8 EMC performance

  1. It can withstand the ESD test of severity class III specified in GB / T 14598.14-1998 (IDT iec255-22-2)。
  2. It can withstand the radiated electromagnetic field interference test of severity class III specified in GB / T 14598.9-2002 (IDT iec255-22-3)。
  3. It can withstand 1MHz pulse group interference test of severity class III specified in GB / T 14598.13-1998 (IDT iec255-22-1)。
  4. It can withstand the fast transient interference test of severity B specified in GB / T 14598.10-2007 (IDT iec255-22-4)。
  5. It can withstand the electrical disturbance test of measuring relay and protection device (GB / T 14598.18-2007): surge impulse test of severity class III specified in Surge immunity test standard。

1.1.9 Mechanical properties

  1. It can withstand the vibration test of severity I specified in gb7261-87-16。
  2. b) It can withstand the impact test of severity I specified in gb7261-87-17.
  3. c) It can withstand the impact test of severity class I specified in gb7261-87-18.

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