Product Details
Smart Led Display Digital Contact Tachometer Cleaer Window Screen
Local Data Query
1. Quick Overview:
WD-AS Single-phase rpm meters are used for measuring and monitoring
the power distribution system. This series of meter can measure rmp
in power distribution or other applications.
It combines the measurement, the analysis and the operation
together, makes the information become clearer, and the operation
become easier.
2. Technical Parameters:
Technical Index | Value |
Input
| Nominal value | Voltage AC:100V,220V,380V; Current AC: 1A/5A |
Overload | Continuous: 1.2 time/1s; Instant: 10 time/1s |
Frequency | 45-65Hz |
Consumption | <0.5VA |
Accuracy | 0.2% |
Function
| Display | LED or LCD |
Communication | RS485,Modbus-RTU protocol |
Alarm | One channel passive relay; Contact capacity: 3A/30VDC,3A/250VAC,
high, low, unbalance alarm etc. |
Analog
| DC4-20mA, DC0-20mA(Load<500Ω), DC0-5V(Load >1kΩ) |
Input: 2-4 channel dry contacts, power inside, optocoupler
insolation |
Output: 2 switch output,normal open contact of relay |
Contact capacity: 3A/30VDC,3A/250VDC |
Power Supply
| Voltage Range | AC/DC85-270V |
Power consumption | <5VA |
Insulation resistance | ≥100MΩ |
Power Frequency Withstand Voltage | 2kv/1min |
Environment
| Temperature | Opertation: -25-55℃, Storage: -20℃-75℃ |
Humidity | ≤93RH, no condensation, without corrosive |
Attitude | ≤2500m |
3. Main Features:
- High-precision measurement of rpm meter
- Active power display, the local data query
- The current transformation ratio programmable settings
- Support for RS-485, Modbus-RTU Protocol
- Support the switch quantity input. digital output, analog output
quantity transducer
- Auxiliary power supply: ACDC
80V-270V,AC220V,AC380V,AC100V,DC48V,DC24V
- Choose a variety of profiles, meet the requirements of different
Cabinet electrical circuits.
4. Ordering Code:
Model Name | Basic Data | Model No | Dimension(mm) | Cut-out (mm) |
Single-Phase Digital Tachometer | - LED Display
- Input: From sensor output
- Transformation ratio: adjustable
- Measurement: Speed of Revolution
| WD-9S-□ | 120*120 | 111*111 |
WD-3S-□ | 96*96 | 92*92 |
WD-AS-□ | 80*80 | 76*76 |
WD-BS-□ | 72*72 | 68*68 |
WD-DS-□ | 48*48 | 45*45 |
5. Wiring Diagram:

6. F & Q:
Wei Dian Union is a new company, eastablished in the year of 2015,
we have 15 technical engineer and 10 sales man, including domestic
and international sales. Our team is young, which guarantee us more
vitality.
- Is your company manufacturer or trading company?
Yes, we are the manufacturer, we buy house and develop moudles all
by ourselves.
- What is the warranty of your products? and how about your quality?
All of our meters have 18 months warranty, and we cooperate with
the university to develop new items and quality control, besides
our own technical team.
- How about your payment term and shipment?
We accept T/T, L/C and western union, prefer to TT, delivery date
should be within one week after payment.
- What’s your advantage? Why should I choose your company?
Price: Compared with other famous company, our cost is much lower;
Quality: We have strict quality control, each meters have to accept
life-time testing & inspection.
Sales supports: We are not big company, so our policy is flexible,
quick action to any requirements.
Company Profile
Wei Dian Union(Hubei) Technology Co.,Ltd.
Wei Dian Union(Hubei) Technology Co.,Ltd. Located in Optics Valley
of China--- Wuhan East lake high-tech development Zone, established
in 2008, with factory area of 50002 and 120 employees, We are the member of National Standardization
Committee for Electric Meters & Instruments.
Wei Dian Union are specialized in manufacturing electric measuring
instrument and current transformer with a concentration in R&D,
Production, sales & after sales, which guarantee us strictly
comply with standard of GB/T22264-2008 & GB/T7676-98 to
operate. Now , we have ISO9001-2008 certificate, digital meter have
passed CE, while marine meter approved by China Classification
Society (CCS).
Our products are widely used in transmission & distribution
power system of shipping, aviation, railway, oil, chemistry,
metallurgy, electric, power station, intelligent building,
industrial instrument, etc.
Weidian Union has a great team to service domestic & overseas
customers. With the help of university, our technical department
are able to share with the newest techonology to promote upgrade of
products. Our sales team divided into domestic and international
sales, which help customers on pre-selling, sales and after
service, make sure to satisfy diversity demands from customers, the
team always ready in 7*24 hours. Producing & QC department:
Over 3 years' skilled workers,to fulfill the producing, assembling
and adjusting works.
With the principle of “Pursuing for precision and perfection,
unifying thinking and behavior ”, continuous exploration and
innovation to meet customers’ demands. Reliable quality and good
after-service receive more and more trust from users.