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Shanghai Mingxing Electric Co., Ltd
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Multifunction Protection Relay, Electric Protection Device |
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 Click to enlarge image
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 Model Number |
MGP Series |
1 Introduction
a.) MGP10 multifunction protection relay is series digital relay developed by Shanghai Mingxing Electric Co., Ltd. This device has high performance-price ratio, and was widely used at 35kV and below power system and industries such as traffic, metallurgy, energy sources and chemical indutry., etc. It is suitable for all kinds of medium voltage network (non-earthing network, resistance earthing, arc-elimination coil earthing and direct earthing network)
b.) This device adopts advanced software and hardward computer technic, industry local bus technology and power system automatization technology.,etc. It possesses all kinds of functions such as protection, metering, control and signal., etc. and has so many advantages such as stable performance, convenient application and strong anti-interference ability., etc. It is the ideal device for reliably supplying power to users.
2 Characteristic
High performance
a.) All specifications of device adopts general software and hardware, which guarantee the uniform performance of serilization products.
b.) High-performance 16 digit SCM technic, bus don?t adhibited from outside, thus guarantee the stability of product and operation speed.
c.) Collocating big-capacitance memorizer, can continuously record 64 items of recently happened events, the data won?t be lost after many times of erasure and power off
High Reliability
a.) Conform with EMC and relevant environment standard, advanced structure design and low fault ratio.
b.) Adopts international high-quality connector plug, which guarantee electric fault won?t happen because of mechanical connection damage.
c.) Industrial-strength core board, high integration level.
Local Free of Maintenance
a.) Aborative electric design, the device has no adjustable components.
b.) Adopts high-quality components, strict inspection before use, thus guarantee the long-term use of device.
c.) Super anti-interference performance, mounted onto the switch board, anti-vibration, dampproof and dustproof.
d.) Perfect diagnosis function, It can inspect the device fault and fault of controlled object, and alarm output.
Exquisite Appearance
a.) Aluminium section bar enclosure, airtight seal design, compact structre and good appearance.
b.) Clear LED display, english operation interface, multi-class rights management for users.
3 Technical Parameter
Power supply
a.) Rated operation power supply 220V or 100V（AC & DC）
b.) Power nominal voltage percentage -20%～+20%
c.) Power consumption ≤10W
d.) Rated frequency 50Hz or 60Hz
AC input rated value
a.) Current transformer 5A or 1A，power consumption<1.0VA/phase
b.) Voltage transformer 100V or 220V，power consumption<0.5VA/phase
c.) Frequency 50Hz or 60Hz
Thermal stability
a.) AC current circuit 2In continuous work；10In permit 10s；40In permit 1s
b.) AC voltage circuit 1.5Un continuous work；above 1.5Un not permit
Output relay
a.) Signal contact capacity Permit long-time pass 5A current；
permit instantaneous cut 0.3A current (DC220V，=5ms)
b.) Trip output contact capacity Permit long-time pass 8A current；
permit instantaneous cut 0.3A current (DC220V，=5ms)
Digital input
a.) Digital Input Voltage DC24V(12V～36V)
b.) Input resolution 2ms
EMC characteristic
a.) Radiation electromagnetic field IEC 60870-2-2：1996
b.) Instantaneous Pulse cluster IEC 60870-2-2：1996
c.) High-frequency interference IEC 60870-2-2：1996
d.) Static discharge IEC 60870-2-2：1996
Work Environment
a.) Operation temperature -20°C～+55°C
b.) Humidity 5%～95%
c.) Temperature variation ratio <25oC/h
d.) Atmosphere pressure 70～110Kpa
Protection parameter setting-value error
a.) Current setting-value error 0.1In～0.4In, not exceed ±0.015In；
0.4In～20In, not exceed ±3％
b.) Voltage setting-value error 2.0V～10V, not exceed ±0.3V；
10V～100V, not exceed ±3%
c.) Time delay setting-value error 0～2s, not exceed 40ms；
2s～100s, not exceed ±2%
Communication Mode
a.) Communication interface RS485（1200bps～19200bps）
b.) Communication stipulation IEC 870-5-103
Other technical data
a.) Total weight ≤2kg
b.) Mean time between failure ≥50,000h
4 Selection Guide
MGP10 multifunction protection relay is classified into the following types:
a.) MGP101 line protection
b.) MGP102 transformer protection
c.) MGP103 motor protection
d.) MGP104 Capacitor protection
e.) MGP105 Spare power automatic switching protection
f.) MGP106 Integrated metering & control device（without protection function）
5 Communication interface and connection mode
RS485 bus
This device can connect several MGP10 communication management unit through RS485 bus mode. please use shielded twisted-pair for RS485 bus, and reliable earthing, the line length less than 1km.
Note: Special protection function can be changed according to actual requirements
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