Me440

• After-sales Service: Provide Customers with Long-Term After-Sales Warra
• Warranty: 1year
• Transport Package: Carton
• Specification: L*W*D: 21.5*10*3.5CM
• Trademark: MEATROL
• Origin: Shanghai
• Model NO.: ME440
• Production Capacity: 1000

Product Description

ME237 panel three-phase multi-function power meter that supports direct current input or external open Roche coils or voltage CT
The ME237 supports three-phase, three-wire and three-phase, four-wire systems.
Realize line-free testing, simplify testing steps, and save construction costs.
The amount of electrical parameters collected at the front end is transmitted to the system data center in real time.
The RS485 communication interface is standard and is compatible with a variety of configuration systems via the standard Modbus-RTU protocol.
The current, voltage, power factor, harmonics, power, electrical energy and other electrical parameters on the A, B and C phase grids can be measured.

Specification
Model	ME440
Product component type	Handheld;poly-phase;data logger;power analyzer
Poles description	3PH4W  3PH3W 1PH2W (L-N); 1PH2W(L-L);1PH3W(L-L-N)
Device application	Power analysis Data log
Input type	External Rogowski coil External CT(333mV only)
Display	3.5 inch TFT screen display
Sampling rate	8k samples per second
Harmonic	51th in the mean time
Mechanical characteristics
Weight	850g (with Accessory 2kgs)
Dimension	L*W*D:21.5*13*6CM

Power Meter Characteristics
The power meter measures currents and voltages and reports real-time RMS values for all 3-phases and neutral. In addition, the power meter calculates power factor, realpower, reactive power, and more.
The following sections list the metering characteristics of the power meter.
Demand Readings
The power meter provides the following demand readings.

Characteristics	Description
Current	Per phase and average
Active, reactive, apparent power	Per phase and Total
Peak Demand Values
Current	Per phase and average
Active, reactive, apparent power	Per phase and Total

Demand Calculation Methods
Power demand is the energy accumulated during a specified period divided by the length of the period. Current demand is calculated using arithmetical integration of the current RMS values during a time period, divided by the length of the period. How the power meter performs this calculation depends on the selected method. To be compatible with electric utility billing practices, the power meter provides block interval power/current demand calculations.
For block interval demand calculations, you select a block of time (interval) that the power meter uses for the demand calculation and the mode the meter uses to handle he interval. 2 different modes are possible:
• Fixed block - Select an interval from 1 to 60 minutes (in 1 minute increments). The
 power meter calculates and updates the demand at the end of each interval.
• Sliding block - Select an interval from 1 to 60 minutes (in 1 minute increments). For demand intervals less than 15                 minutes, the value is updated every 15 seconds. For demand intervals of 15 minutes and greater, the demand value is updated every 60 seconds. The power meter displays the demand value for the last completed interval.
Peak Demand
In nonvolatile memory, the power meter maintains a maximum operating demand value called peak demand. The peak is the highest value (absolute value) for each of these readings since the last reset.
You can reset peak demand values from the power meter display. You should reset peak demand after changes to basic power meter setup such as power system configuration.
Energy Readings
The power meter calculates and stores Per phase and total energy values for active,reactive, and apparent energy.
You can view energy values from the display. The resolution of the energy value automatically changes from kWh to MWh to GWh (kVAh to MVARh to GWh).
The energy values automatically resets to 0 when it reaches the limit of 999.9GWh,
999.9GVAh, or 999.9GVARh.

Minimum/Maximum Values
When any one-second real-time reading reaches its highest or lowest value, the power meter saves the minimum and maximum values in its nonvolatile memory.
From the power meter display, you can:
• view all min./max. values since the last reset and the reset date and time.
• reset min./max. values.
All running min./max. values are arithmetic minimum and maximum values. For example, the minimum phase A-N voltage is the lowest value in the range from 0 to 999.9GV that has occurred since last reset of the min./max. values.
The power meter provides time stamping for all minimum/maximum values.
The following table lists the minimum and maximum values stored in the power meter:
 

Characteristics	Description
Current	Per phase and average
Voltage	per phase and average
Active power	Per phase and total
Reactive power	Per phase and total
Apparent power	Per phase and total

Minimum/Maximum Values
When any one-second real-time reading reaches its highest or lowest value, the power meter saves the minimum and maximum values in its nonvolatile memory.
From the power meter display, you can:
• view all min./max. values since the last reset and the reset date and time.
• reset min./max. values.
All running min./max. values are arithmetic minimum and maximum values. For example, the minimum phase A-N voltage is the lowest value in the range from 0 to 999.9GV that has occurred since last reset of the min./max. values.
The power meter provides time stamping for all minimum/maximum values.
The following table lists the minimum and maximum values stored in the power meter:

Characteristics	Description
Current	Per phase and average
Voltage	per phase and average
Active power	Per phase and total
Reactive power	Per phase and total
Apparent power	Per phase and total

 

SPECIFICATION
MODEL	ME435
product description	HANGHELD THREE PHASE ROGOWSKI POWER METER
device application	3PH4W 3PH3W 1PH2W(L-N);1OH2W(L-L);1PH3W(L-L-W)
input type	BNC terminal 33 mV CT BNC terminal Rogowski coil
DISPLAY	3.5inch TFT screen display
SAMPLING RATE	8k samples per second
MOUNTING MODE	Panel mounting
HARMONIC	52th Max
POWER	4*AA battery(working time:approx 7 hours) or 9V DCpower supply(included adaptor)