Energy-400 M PWRi - Measurement Vemer - Free user manual and instructions

Product Type	Power Analyzer / Energy Meter
Brand	Vemer
Model	Energy-400 M PWRi
Measurement Functions	Voltage, Current, Active/Reactive/Apparent Power, Power Factor, Frequency, Active/Reactive Energy
Display	Backlit LCD, 4 lines of 16 characters
Dimensions (W x H x D)	96 x 96 x 60 mm (panel cutout: 92 x 92 mm)
Weight	Approx. 200 g
Power Supply	100-240 VAC, 50/60 Hz or 24 VDC (optional)
Communication Interfaces	RS485 Modbus RTU (optional Ethernet)
Inputs	3-phase voltage (up to 400 V L-L), 3-phase current via external CTs (5A secondary)
Accuracy	Class 0.5S for energy (IEC 62053-22)
Operating Temperature	-10°C to +55°C
Storage Temperature	-20°C to +70°C
Protection Degree	IP40 front panel, IP20 rear
Installation	Panel mount, flush
Compliance	CE, IEC 61010-1
Maintenance	No user-serviceable parts; cleaning with dry cloth; periodic calibration recommended every 5 years
Safety	Use insulated tools; disconnect power before wiring; ensure proper grounding
Spare Parts & Repairability	Contact Vemer support for replacement parts; device is not field-repairable, return for service

Frequently Asked Questions - Energy-400 M PWRi Vemer

How do I connect the Energy-400 M PWRi to my system?

Connect voltage inputs (L1, L2, L3, N) directly to the measuring lines (max 400V L-L). For current, use external current transformers (CTs) with 5A secondary; connect the CTs to the corresponding inputs. Ensure the CT orientation matches the energy flow direction. Refer to the wiring diagram in the manual.

Can this meter measure single-phase systems?

Yes, it can be configured for single-phase, split-phase, or three-phase systems (3 or 4 wires). Set the wiring configuration via the front panel menu.

How do I reset the energy counters?

Press and hold the 'SET' button for 5 seconds to access the reset menu. You can reset total or partial energy counters. A password may be required if set.

What is the maximum cable length for the RS485 communication?

The maximum cable length for RS485 is typically 1200 meters (4000 feet) at 9600 baud. Use twisted-pair shielded cable with proper termination resistors.

How often should the meter be calibrated?

For accuracy class 0.5S, calibration is recommended every 5 years or as per local regulations. Contact Vemer or an accredited lab for calibration services.

What do the symbols on the display mean?

The display shows measurement values, unit symbols (V, A, kW, kWh, etc.), phase indicators (L1, L2, L3), and status icons (communication active, alarm, etc.). Refer to the manual for full symbol descriptions.

Can I use the meter outdoors?

The meter is designed for indoor use only (IP40 front). If installed outdoors, it must be placed inside a weatherproof enclosure with appropriate IP rating.

What is the power consumption of the device itself?

The device consumes less than 5 VA from the power supply (voltage measuring circuit). The power supply input is used for the electronics and backlight.

How do I configure the CT ratio?

Enter the setup menu by pressing 'SET' for 3 seconds. Navigate to 'CT ratio' and set the primary current of your external CTs (e.g., 100/5A -> ratio 100). Save and exit.

What should I do if the display shows 'Err'?

Error codes indicate issues like phase loss, overvoltage, or communication failure. Check wiring connections and ensure all phases are present. Refer to the error code table in the manual for specific actions.

USER MANUAL Energy-400 M PWRi Vemer

3 CT connection WITH or WITHOUT neutral (3 or 4 wires)

Instrument description (C)

USER MANUAL

THREE-PHASE ACTIVE ENERGY METER

Read all instructions carefully

■ The energy meter ENERGY-400 M PWRI is an electronic static device to read active energy in three-phase systems.
The energy meter ENERGY-400 M PWRI is in compliance with MID (2004/22/CE) and it's suitable for use in mechanical environment of type M1 and in electromagnetic one of type E2.

SAFETY WARNINGS

To guarantee correct installation, proceed as follows:

1) The appliance should be installed by qualified operator
2) The appliance should be installed in a panel in such a way as to guarantee that the terminals are inaccessible after fitting
3) The appliance should be installed in a panel in such a way to guarantee a protection IP51 in accordance with the standard CEI EN 60529.
4) A protection device against over-currents should be installed in the electrical system, upstream of the energy meter.
5) Connect the instrument as shown in the alongside diagrams.
6) Before touching the connector terminals make sure that the wires to be connected or already connected to the instrument are not live.
7) Touch the dip-switches only when the instrument is not powered.
8) Do not power or connect the instrument if any part of it is damaged.
9) The instrument must be installed and activated in compliance with current electric system standards.

Code

Model

Description

Three-phase energy meter 400 VAC MID

TECHNICAL SPECIFICATIONS

• Power supply:
3x230 V AC phase-neutral (400VAC phase-phase) (-15% ÷ +10%)
• Frequency: 50 Hz
• Start-up current: I_d=15 mA
• Minimum current: I_min = 0.1 A
• Reference current:
• Transitional current: I_α=0.25A
• Maximum current: I_max=6A
• Maximum power consumption:
- voltage circuits < 2.5 VA
- current circuits < 2.5 VA
• Meter constant: 4 Imp./kWh
• Voltage inputs: input impedance = 2 MΩ
• Current inputs: coils with insulation between primary and secondary
• Optoinsulated impulse output:
- weight impulse: 1 kWh/impulse
- Impulse duration < 100 ms ± 15%
- voltage: 9÷24 V DC ± 10%
- maximum output current: 20 mA

• Insulation:
- reinforced between impulse output and other terminals
- reinforced between terminals and accessible parts after installation
• CT available: 5-10-25-50-75-100-125-150-200-250-300-400-500-600-800-1000/5A
• Operating temperature: -10 °C ÷ +55 °C
• Storage temperature: -25°C ÷ + 70 °C
• Relative humidity: 10÷90% non condensing
• Class index: class A
- Container: 4 modules DIN
• Protection level: IP20 / IP40 on the front

Marking (D)

INSTRUMENT DESCRIPTION

① Dip-switch for CT setting
② Green warning light: lights up to indicate power on
③ Red warning light: flashes to indicate that the instrument is metering energy (4 flashes / kWh)
② Yellow warning light: when lit instrument detects 1/4 kWh negative (probable incorrect entry) and remains lit until 1/4 kWh positive is detected Check the insertion of CT: connect L1, L2, L3 from power panel to P1 of CT and connect P2 of CT to the load

③ Impulse output Optoinsulated

⑤ Electro-mechanical impulse counter: resolution 1 kWh

GUIDE TO INSTALLATION

1) Before installing the instrument, select the required transformation ratio, as shown in panel (C).
2) The CT secondaries may be connected to earth.
3) The instrument should be connected as shown in the panel (B), in accordance with the CT current directions.
4) If the error is to fall within the class limits of the instrument, it is necessary to use the current transformer in its linear operating field.

5) If the instrument is active to power should be switched off to change the CT ratio.
6) In case of changes to the dip-switches with instrument activated, these locks in fault condition with red and green lights always on. In this condition the instrument doesn't count.
To restore the correct operation, reposition the DIP switches in the initial condition or reset the instrument by removing and restoring power.

REFERENCE STANDARDS

Conformity to EU directive:

2004/22/CE (MID)

is declared with reference to the following harmonised standards:

EN 50470-1 and EN 50470-3