Beijing Gemotech Intelligent Technology Co., Ltd. 

Specification:
Specification  R8074: Threephase Multifunctional Intelligent Electricity Meter with Transmitting and LCD Display 
Measured Channels  Threephase voltage and current, and expansion I/O function 
Measured Parameter  The real effective value of current and voltage, power factor, active power, reactive power, frequency, power factor, input active electrical degree, output active electrical degree, total electrical degree, reactive electrical degree, apparent power, total apparent power 
Input Frequency  45~75Hz 
Voltage Range  10~500V, can measure higher voltage by appending voltage transformer and setting voltage transformation ratio 
Current Range  Basic range is 0~5A, can measure greater current by appending current transformer, and setting current transformation ratio. 
Signal Processing  16bits A/D converter,6 channels, every channel synchronistical AC samples at the speed of 4KHz.The real time data of module is real effective value of 1 second( refresh one time a second) 
Overload Capability  Can measure exactly 1.4 times of range input; instant current (10 cycles) is 5 times, no damage when voltage range is 3 times. 
Output Data  Electric parameters such as threephase voltage Ua, Ub, Uc; threephase current Ia, Ib, Ic; active power P, reactive power Q, power factor PF, frequency f, active power of each phase Pa, Pb, Pc; reactive power of each phase Qa, Qb, Qc; forward active electrical degree, reversed active electrical degree, forward reactive electrical degree, reversed reactive electrical degree. 
Output Interface  RS485/RS232(It is optional,customers need to declare before ordering goods.) 
Communication Rate  1200,2400,4800,9600BPS 
Communication protocol  ASCII commands and MODBUS/ASCII protocol 
Degree of Accuracy  Current, voltage: 0.2, the rest: 0.5 
Parameter Setting  Input by film keyboard 
Power supply  220VAC 
Display  LCD liquid crystal display 
Builtin realtime clock provides the information of year, month, day, and hour, minute and second, to make sure supplying electricity uninterruptedly for 10 years with lithium cell. 
Note: R8074 possesses the functions above, also include optional configuration function (If you need these functions, please communicate with your sales):
Performance Specification
Order  Item  Description  Measurement accuracy (Accuracy range) 
1  Voltage of each phase (V1, V2, V3)  Direct measurement range: 0~500.0V, denote by 16 bits unsigned short integer (Divided by 100).  0.2% (50~500V) 
Voltage transformer PT ratio is 1~10000:1, denote by 16 bits unsigned short integer  
Display value: 0~1000.0KV, 6 digits number (1 digit after radix point).  
2  Current of each phase (I1, I2, I3, In)  Direct measurement range: 0~5.000V, denote by 16 bits unsigned short integer (Divided by 1000).  0.2% (0.5~5A) 
Voltage transformer CT ratio is 1~10000:1, denote by 16 bits unsigned short integer  
Display value: 0~50.000KA, 5 digits number (3 digit after radix point).  
3  Active power of each phase (P1, P2, P3)  Direct measurement range: 0~2500.0W, denote by 16 bits signed short integer (Divided by 10). Display value: 0~50000.0MW, 6 digits number (1 digit after radix point).  0.5% (25~2500W) (0.5<PF<1) 
4  Total active power for three phase (P)  Direct measurement range: 0~7500.0W, denote by 32 bits signed long integer (Divided by 10). Display value: 0~150000.0MW, 7 digits number (1 digit after radix point).  0.5% (75~7500W) (0.5<PF<1) 
5  Reactive power of each phase (Q1, Q2, Q3)  Direct measurement range: 0~2500.0VAr, denote by 16 bits signed short integer (Divided by 10). Display value: 0~50000.0MVAr, 6 digits number (1 digit after radix point).  0.5% (25~2500Var) (0.5<PF<1) 
6  Total reactive power for three phase (Q)  Direct measurement range: 0~7500.0Var, denote by 32 bits signed long integer (Divided by 10). Display value: 0~150000.0MVAr, 7 digits number (1 digit after radix point).  0.5% (75~7500Var) (0.5<PF<1) 
7  Apparent power of each phase (S1, S2, S3)  Direct measurement range: 0~2500.0VA, denote by 16 bits signed short integer (Divided by 10). Display value: 0~50000.0MVA, 6 digits number (1 digit after radix point).  0.5% (25~2500VA)

8  Total apparent power for three phase (S)  Direct measurement range: 0~7500.0VA, denote by 32 bits signed long integer (Divided by 10). Display value: 0~150000.0MVA, 7 digits number (1 digit after radix point).  0.5% (75~7500VA)

9  Power factor of each phase (PF1, PF2, PF3)  Denote by 16 bits signed short integer (Divided by 10000). Display value: 1.000~1.000, 4 digits number (3 digits after radix point).  0.5% (0.5~0.5)

10  Frequency (f)  Direct measurement range: 45~55Hz, denote by 16 bits signed short integer (Divided by 100). Display value: 0~55.0Hz, 3 digits number (1 digit after radix point).  0.2% (45~55Hz) (Voltage≥20V) 
11  Active electrical degree (Input active: Epi) (Output active: Epo)  Direct measurement range: 0~4000.000KWh, denote by 32 bits unsigned long integer (Divided by 1000). When the absolute value of any phase’s active power is less than 1 (W×PT×CT), this phase will not cumulate active electrical degree. Display value: 0~4000.000KWh, 7 digits number (3 digits after radix point). When the input active electricity acquisition reach up to N×0.01KWh×PT×CT, output 1 pulse (50% duty ratio). N is pulse parameter, can be set at the board.  0.5% (25~2500W) 
12  Reactive electrical degree (Inductive reactive: Eqind) (Capacitive reactive: Eqcap)  Direct measurement range: 0~4000.000KVArh, denote by 32 bits unsigned long integer (Divided by 1000). When the absolute value of any phase’s reactive power is less than 1 (W×PT×CT), this phase will not cumulate reactive electrical degree. Display value: 0~4000.000KVArh, 7 digits number (3 digits after radix point).  0.5% (25~2500Var) 
13  Outside supply  AC220V±10%, power consumption≤15W  
14  Environment  Temperature: 10~45℃; Humidity: 0~95% (noncondensing)  
15  Liquid crystal display  White characters on blue background, 128×64 resolution, 5 lines Chinese word display. 