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Vertical microcomputer protection device
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This microcomputer comprehensive protection and control device is suitable for power networks of 35KV and below, and provides protection, control, measurement and monitoring functions for transmission lines, transformers, capacitors, motors and other main equipment. In the equipment, the screen can be grouped together in a centralized manner, and it can also be installed in a distributed manner. Through the standardized field bus interface, it supports multiple joints to work together to realize system-level management and comprehensive information sharing. This series of microcomputer protection measurement and control devices is fully in line with this technology. And adapt to the requirements of future development, it is the ideal basic equipment for the transformation and distribution automation system.
1.1. Real-time data measurement
The comprehensive protection device adopts a new and improved measurement technology, and has a powerful vectorized calculation function. Due to the different digital processing of various analog values, it effectively separates the fundamental wave, high-frequency components and DC components, eliminating The influence of offset and noise on the measurement accuracy, and the effective compensation of the decay of the signal measurement components ensure the long-term, stable and reliable operation of the device in various harsh environments.
¡øla, lb, lc protection current (measured);
¡ø UAB, UBC, UCA three-phase line voltage (measured);
¡øl0 zero-sequence current (measured):
¡ø3U0 zero sequence voltage (measured):
¡øThe sampling element adopts precision voltage and current transformer, which is small in size, light in weight and small in load;
¡øUsing high-speed and high-precision DSP microprocessor, it can quickly process the 9th harmonic quantity;
1.2. Control output
¡ø Closing relay:
¡øOpening relay;
¡øProtection relay;
¡øAccident warning relay;
¡øEvent alarm relay;
¡øTwo remote control output relays;
¡øOptional independent anti-jump circuit without opening and closing current requirements:
1.3. Binary input
¡ø 10-way passive switch input isolated by photoelectric coupling elements:
¡øThe unique anti-shake filter algorithm eliminates the misjudgment caused by bounce and instantaneous spark interference;
1.4. Binary output relay output
¡øJumping and closing relays can be turned on and off by software options and external connections and switches;
¡øThe signal relay can be flexibly configured as a holding type or a pulse inching type output;
1.5. Friendly man-machine interface
¡øThe comprehensive protection device is equipped with a dot-matrix 128*64, high-contrast graphic liquid crystal display with white characters on a blue background;
¡øThe operation is based on the full Chinese menu of the WN interface, which can display system parameters such as analog quantities, primary system diagrams, measurement data, switch status, real-time data, event records, and protection settings;
¡øThe soft textured buttons are used to select the screen menu and drive, switch the data screen and set the value. The operation of the interface will not have any impact on the system operation, and the value modification is protected by a password;
¡ø Through the bus interface, it can be connected with a PC to realize more parameter programming;
¡øMonitoring, self-diagnosis and main working conditions of equipment circuits;
¡øAlarms for internal abnormalities (data, fixed values, storage components, ports, communications) of the device:
¡øPT disconnection alarm;
1.6, SOE event and fault records
Display and save a number of recent event records. If a new fault occurs, it can describe the system fault and the response of the protection device in detail. The event record details include:
¡øRecord fault tripping, displacement and operation;
¡øResolution 2ms, keep power off;
1.7. Communication
Supported communication interfaces are: CAN, RS485, RS232, RS422;
Supported physical communication media include:, carrier dedicated line, MODEM, optical fiber, etc.;
A network system with a geographical span can be formed through a multi-point network connection. The single line is stable in the RS485 bus mode, stably connecting 64 nodes, the maximum transmission distance is 1200m, and the maximum transmission rate can reach 9600bps;
¡øIndustrial computer through RS485-RS232 converter, through RS485-optical fiber converter:
¡ø Communication protocol Modbus-RTU, etc.;
2.1¡¢Environmental Conditions
|
Work |
Temperature range |
-10~+55¡ãC |
|
Relative humidity |
45-80% for a short time 95% non-condensing |
|
|
Atmospheric pressure |
80-110kpa |
|
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Altitude |
<2000m |
|
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Storage and transportation |
Temperature range |
-40~+75¡ãC |
2.2¡¢Power supply
|
DC power supply |
Rated voltage |
220VDC£¨110V£© |
|
Permissible range |
100£250V |
|
|
AC power |
Rated voltage |
220VAC |
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Permissible range |
150£250V |
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Power consumption |
The normal |
<3W/VA |
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Action |
<10W/VA |
|
|
Power drop |
50% |
1s |
|
0% |
100ms |
2.3¡¢Protect AC Signal Input
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Electric current |
Rated current In |
5A£¨1A£© |
|
|
Power consumption |
<0.5VA |
||
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Heat stable |
Continuous |
20A |
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1s |
100A |
||
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Dynamic stabilization |
10ms |
250A |
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Voltage |
Rated voltage Un |
100V |
|
|
Ultimate voltage |
200V |
||
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Power consumption |
<0.3VA |
||
2.4¡¢Measuring AC Signal Input
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Parameter name |
Measuring range |
Error |
Power dissipation |
|
Three-phase voltage UAB, UBC, UCA |
10¡129V£¨xPT£© |
<=0.5% |
<=0.3VA |
|
Three-phase current la, lb, lc |
0.2¡6A£¨xCT£© |
<=0.5% |
<=0.3VA |
|
Power factor PF |
0.5L¡0.5C |
<=0.5% |
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2.5¡¢Binary input signal
|
Passive contact signal input |
Number of signal inputs |
10 way |
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The scope of work |
24V DC (self-produced by the device) |
|
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Consumption power |
<0.3W |
|
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Resolution |
2ms |
Pulse frequency<100Hz |
2.6¡¢Mechanical Properties and Structure
|
Package dimensions |
(H)/(W)/(D)mm (for reference only) |
|
Device size |
(H)/(W)/(D)mm (for reference only) |
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Device weight |
Approx. kgmm (for reference only) |
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Shell material |
Aluminum profile structure |
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Degree of protection |
IP5SNI |
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Installation method |
Embedded or tiled, top-impact fixed |
2.7¡¢Binary relay output
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Maximum Switching Voltage |
250V AC/30VDC |
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Maximum switching current |
8A |
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Maximum Switching Power |
1250VA/150W |
|
Output contact capacity |
<250V, 1A (inductive load), disconnection capacity <50W |
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Specified load |
5A 250V AC/30V DC |
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Dielectric withstand voltage |
4000VAC |
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Insulation resistance |
1000M¦¸ |
2.8¡¢Event record
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Logging Event Type |
Fault, over limit, switch displacement, external tripping, modification of fixed value |
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Number of recorded events |
30 |
Power-down retention |
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Record event content |
Year, month, day time scale, event type details |
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Time resolution |
2 ms |
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Event query method |
Far away |
Communication call |
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On the spot |
Button menu LCD display |
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2.9¡¢Communication Interface
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Electrical Specifications (Isolated RS485) |
Number of communication nodes |
64 |
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Transmission rate |
4800¡9600 Buad |
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Transmission distance (9600Buad) |
1000m |
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Connector |
Terminal output |
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IEC60870-5-103 |
8 data bits, 1 stop bit, even parity |
2.10¡¢Test requirements
|
Insulation test |
Insulation resistance |
2kv50Hz1minute |
|
Power frequency withstand voltage IEC60-2 |
50M¦¸ |
|
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Damp heat test IEC60-2-30 |
50M¦¸ 1.5kV |
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Shock withstand voltage test |
Switch value input circuit to ground |
¡À5kV |
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Other circuit IEC255-5 |
¡À5kV |
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Mechanical shock test |
Test position |
Triaxial |
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Test frequency range |
10¡150Hz |
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Crossover Frequency |
f¡Ü60Hz; fixed amplitude 0.075mm |
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Number of sweep cycles per axis |
f>60Hz; constant acceleration 10m |
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IEC255-21 |
10/S2 |
2.11¡¢EMC electromagnetic compatibility
|
Anti-high frequency interference test IEC255-22-1 1M attenuation shock wave |
Common Mode |
2.5kV |
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Differential mode |
1.0kV |
|
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Electrostatic discharge interference test Grade III IEC6100-4-2 |
Contact |
6.0kV |
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Air |
8.0kV |
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Radiated electromagnetic field interference test EN55011 |
Strength of the test field |
|
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Scanning frequency |
150kHz¡80MHz |
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Radio Frequency Interference Test |
Directly referenced in a common mode£¨IEC6100-4-6£© |
10V/m(rms) f=150kHz¡80MHz |
|
in a radiative manner quote £¨IEC6100-4-6£© |
10V/m(rms) f=80Hz¡1000MHz |
|
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Fast Transient Tests IEC255-4 |
Common Mode Voltage Peak Pulse frequency Duration of each polarity |
2kV 4kV |
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5kz 2.5kz |
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10min |
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Surge lightning test IEC6100-4-5 |
Power supply, AC, DC inlet |
4KV Common mode |
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2KV Differential mode |
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I/O Entrance |
2KV Common mode |
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1KV Differential mode |
