Description
PS7777-series digital active/reactive power meter
Summary&application:
PS7777-series digital active power meter is the new generation of programmable intelligent instrument, integrated with measurement, alarming, transmission and communication, mainly applied into real-time measurement and indication for the active power in the three phase electrical circuit, conducting limited alarming output for transmission output towards electrical data according to the set measured value, realizing networking through RS485 communication interface and the host computer.
1.Main functions and characteristics
◆It can measure and display single/three phase active power value with digital direct reading method.
◆Extendible for analog quantity output function, transmitting specification of 4~20mA, 0~20mA, 0~10mA which is optional.
◆Extendible for switch quantity output function for the relay, realizing upper/lower-limit alarming output.
◆Extendible for RS-485 communication interface, adopting the standard ModBus-RTU communication protocol and the baud rate can be set.
◆Parameters including current/voltage ratio of the meter, upper/lower-limit alarm value, alarming return difference, communication address of the meter, baud rate, transmitting output mode, transmitting output range, etc. are programmable.
2.Model specification and selection description:
(Unit: mm)
| Model | Measurement display | T(communication) RS485 interface |
K Switch quantity output |
B analog quantity output | External size | Display mode | ||
| Single phase active power | Three phase three wire active power | Three phase four wire active power | ||||||
| PS7777-1 | ● | @ | @ | @ | 96×48 |
LED display |
||
| PS7777-1Y | ● | @ | @ | @ | 96×48 | |||
| PS7777-1S | ● | @ | @ | @ | 96×48 | |||
| PS7777-2 | ● | @ | @ | @ | 72×72 | |||
| PS7777-2S | ● | @ | @ | @ | 72×72 | |||
| PS7777-3 | ● | @ | @ | @ | 96×96 | |||
| PS7777-3Y | ● | @ | @ | @ | 96×96 | |||
| PS7777-3S | ● | @ | @ | @ | 96×96 | |||
| PS7777-5 | ● | @ | @ | @ | 120×60 | |||
| PS7777-5S | ● | @ | @ | @ | 120×60 | |||
| PS7777-6 | ● | @ | @ | @ | 80×80 | |||
| PS7777-6S | ● | @ | @ | @ | 80×80 | |||
| PS7777-7 | ● | @ | @ | @ | 160×80 | |||
| PS7777-7Y | ● | @ | @ | @ | 160×80 | |||
| PS7777-7S | ● | @ | @ | @ | 160×80 | |||
| PS7777-8 | ● | @ | @ | @ | 120×120 | |||
| PS7777-8Y | ● | @ | @ | @ | 120×120 | |||
| PS7777-8S | ● | @ | @ | @ | 120×120 | |||
Note:
1.●means the intrinsic functions of the instrument
2.＠means extendible corresponding optional functions of this series of instruments.
3.The size code with 2, 5, 6 can only be configured with any 2 types of function modules, the size code with 1, 3, 7, 8 can be configured with any of 3 types of function modules.
4.All the above models of instrument can be made corresponding reactive power meter (PQ7777 series).
3. Main technical performance and parameters:
| Technical parameters | index | ||
| Wiring mode | Single phase, three phase three wire, three phase four wire | ||
|
Input |
Voltage |
Rated value | AC100V, 220V, 380V |
| Overload | Continuous: 1.2 times, instant: 2 times/1s | ||
| Consumption | ≤1VA(each phase) | ||
| Resistance | 100V(about 120K), 220V(about 400K), 380V(about 600K) | ||
|
Current |
Rated value | AC1A, 5A | |
| Overload | Continuous: 1.2 times, instant: 10 times/5s | ||
| Consumption | ≤0.5VA (each phase) | ||
| Resistance | <20mΩ(each phase) | ||
| Measuring rang of the frequency | 45Hz-65Hz | ||
|
Output |
Display mode Measuring accuracy |
5-digit LED display, reactive power displays “-“ Voltage Class 0.5 Resolution 0.1V Current Class 0.5 Resolution 0.001A Active power Class 0.5 Resolution 1W Reactive power Class 1.0 Resolution 1var The unit can switch automatically, the decimals shift automatically |
|
| Display range | 0~9999MV(Mvar), display “—-“ when out of the display range | ||
|
Communication |
Mode | RS-485 | |
| Protocol | MODBUS-RTU | ||
| Baud rate | 1200bps, 2400bps, 4800bps, 9600bps, 19200bps, assumed to be 9600bps | ||
| Switch quantity output | Upper/lower limit alarm with the same one relay output, contact capacity:AC250V/2A, DC30V/2A | ||
| Analog quantity output | DC0mA~10mA, DC0mA~20mA, DC4mA~20mA, Class 0.5, output overload≤500Ω, the voltage output can be custom-made | ||
| Working power supply | Range | AC/DC85V~264V | |
| Consumption | <5VA | ||
Note:
The items marked * are optional, which shall be specified by the customers when ordering.
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