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Changzhou Dacan Electronic Co., Ltd Mob: +86(0)13915077376 Tel: +86-519-85606622 Fax: +86-519-85607968 E_mail: sales@czdacan.com Web: www.oudz.cn |
Mounted multi-rate watt-hour meter is a kind of intelligent meter with functions of measure, display, communication, energy pulse output and programmable, up to 2 sets of 12-hour sections with 4 kinds of rates. Standard RS-485 communication interface, in line with Modbus-RTU communication protocol. With blue backlit LCD display, the installation structure is screen loaded mode, they can be widely used for energy metering, management and evaluation, application in substation, power distribution room, intelligent building and enterprise internal etc.
The products meet the national standard GB/T 17883-1999 and GB/T 15284-2002. Products comply with GB/T22264. 1-2008, GB/T13978-2008
2. Typical Product Pictures
3. Models and Meaning of Products
4. Products Models
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Model Product function |
DC2800-A |
DC2800-B |
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Real-time measurement |
Three-phase voltage |
√ |
√ |
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Three-phase current |
√ |
√ |
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Active power |
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Reactive power |
√ |
√ |
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Apparent power |
√ |
√ |
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Power factor |
√ |
√ |
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Frequency |
√ |
√ |
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Electric energy metering |
Active electric energy |
√ |
√ |
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Reactive electric energy |
√ |
√ |
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Bi-directional metering |
√ |
√ |
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Harmonic wave |
2-31 times of odd harmonic component |
√ |
√ |
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Real-time clock |
Year, Month, Date, Hour, Minute, Second |
√ |
√ |
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Electric energy pulse |
Passive stem node |
2 |
2 |
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Analog output |
AO (DC4-20mA) |
4 |
2 |
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On-off output (Relay output) |
DO/RO (AC400V/0.1A, or AC250V/5A) |
4 |
2 |
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On-off input |
DI (Passive stem node) |
4 |
2 |
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Communication interface |
RS485, Modbus-RTU |
√ |
√ |
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Display mode |
LCD |
LCD |
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Panel size (mm) |
120x120 |
96x96 |
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Hole size (mm) |
111x111 |
91x91 |
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Installation mode |
Panel Mounting |
Panel Mounting |
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Remark: 1) “√” means the model has the function. 2) “ - “ means the model doesn’t have such function. 3) The number means channel, for example: 2 means the model has the function with 2 channels. |
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5. Technical Specifications
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Description |
Parameters |
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Precision grade |
Electric capacity metering: active electric energy: 0.5 class, reactive electric energy grade:1.0, transmission output grade 0.5 |
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Display mode |
LCD screen display |
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Input signal |
Measurement network |
Three-phase four-wire V34/Three-phase three-wire V33 |
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Voltage |
Rated voltage |
AC100V, AC400V |
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Excess load |
Continuance: 1.2 times; Instantaneous: 2 times (10s) |
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Power consumption |
＜0.6VA (each phase) |
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Impedance |
＞200kΩ |
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Current |
Rated current |
AC5A / AC1A |
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Excess load |
Continuance: 1.2 times; Instantaneous: 10 times (5s) |
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Power consumption |
＜0.4VA (each phase) |
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Impedance |
＜20mΩ |
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Frequency |
45-65Hz ( -0.01Hz) |
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Harmonic wave |
The voltage and current harmonic wave content and 2-31 times of odd harmonic component |
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Electric energy |
Bi-directional Active/Reactive electric energy metering |
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Power supply |
Working scope |
AC/DC 85-264V |
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Power consumption |
＜5VA |
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Function modules |
Electric energy pulse |
Passive optical coupler collector output |
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Communication interface |
1-way RS485 communication interface, Modbus-RTU Protocol |
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On-off input |
Passive stem node |
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On-off output |
Excess alarm or remote relay output capacity AC5A/250V, AC/DC/0.1A /400V |
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Transmission output |
0-20mA/4-20mA/0-5V/1-5V transmission output, programmable to setting transmission items and relative output data. |
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Security |
Insulation resistance |
≥100MΩ |
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Resist pressure |
Input voltage＞1kV, Input and output＞2kV, Power supply and output＞2kV |
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Work environment |
Temperature |
-10℃～55℃ |
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Relative humidity |
≤93％RH |
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Altitude |
Non-corrosive gas forum, Altitude ≤2500m |
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storage environment |
Temperature |
-20℃～75℃ |
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Relative humidity |
≤93％RH |
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6. Outline Dimension
DC2800-A
DC2800-B
7. Typical Functions Terminal Numbering
8. Typical Signal Input Wiring Diagram
DC2800-A
DC2800-B
Note: the above diagram is only for reference, the actual parameters in the factory shall prevail.
Wiring Instruction:
l Input voltage cannot exceed rated input voltage (100V or 400V), otherwise should consider using PT, in order to make maintenance easily, advice to use connector bar.
l Standard rated input current is 5A or 1A, if in the situation of more than 5A, should use exterior CT. If using CT with other meters, wiring method should be series connection, before removing the wire of input current, make sure that cut off CT one circuit or Short sub-secondary circuit in advance, in order to make maintenance easily, advice to use connector bar.
l Make sure input voltage is correspond with input current, phase no. consistent, directions are consistent, otherwise the value and the symbol of power and electric energy will be wrong.
l The meter can work in three-phase four-wire or three-phase three-wire mode, the users should select the appropriate wiring way based on the site situation. Usually under the situation without center line, use three-phase three-wire mode, while three-phase four-wire mode under the situation of center line. Please pay attention that onsite wiring mode must be consistent with the wiring default setting of the meter, otherwise the data of measured by meters will be incorrect.
9. Ordering Example
l Model: DC2800-B
l Signal Input: AC220V, AC200A/5A
l Wire Connection Mode: three-phase three-wire (2CT, 2PT)
l Transmission Output: 4-ways
Transmission 1: DC4-20mA corresponds to Uab
Transmission 2: DC4-20mA corresponds to Ia
Transmission 3: DC4-20mA corresponds to Psum
Transmission 4: DC4-20mA corresponds to Qsum
l Communication: RS485
l Other: other factory pre-sets (if no indication when ordering, ex-factory products will be delivered in accordance with the default setting).
