Vemer PC3R Manual

Vemer Ikke kategoriseret PC3R

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1 5 OPERATIONUser Manual

LOADS CONTROL 3 RELAYS

 Read all the instructions carefully

DIMENSIONS

INSTRUMENT DESCRIPTION

INSTALLATION

5.1

72 60

4.1

4.2

Alar m

PRG

PC3R

Out 1 Out 2 Out 3

ON OFF O N OFF

ON OFF

Re se t

Alar m

PRG

PC3R

Out 1 Out 2 Out 3

ON OFF ON OFFON OFF

Re se t

Alar m

PRG

PC3R

Out 1 Out 2 Out 3

ON OFF ON OFFON OFF

Re se t

Alar m

PRG

PC3R

Out 1 Out 2 Out 3

ON OFF ON OFFON OFF

Re se t

Alar m

PRG

PC3R

Out 1 Out 2 Out 3

ON OFF ON OFFON OFF

Re se t

Alar m

PRG

PC3R

Out 1 Out 2 Out 3

ON OFF ON OFFON OFF

Re se t

Alar m

PRG

PC3R

Out 1 Out 2 Out 3

ON OFF ON OFFON OFF

Re se t

PRG

PRG PRG PRG PRG PRG PRG PRG PRG PRG PRG

PRG

connected load disconnected load absorbed power

1 2 3 1 2 3 1 2 3 1 2 3 1 2 3

connection

loads zone

disconnection

loads zone

delay ONdelay OFF

Time

delay OFF

Power

Setpoint - Hysteresis

Setpoint

Disconnection load 2 (

the second one less priority

)

Connection

load 2

Disconnection load 3 (less priority)

Vemer S.p.A.

I - 32032 Feltre (BL) • Via Camp Lonc, 16

Tel +39 0439 80638 • Fax +39 0439 80619

e-mail: info@vemer.it - web site: www.vemer.it

V3IS00703-011-062018

Mod. PC3R

 Red led: on if the absorbed power is higher than the setpoint

 Keys increase/decrease

 Key PRG: instrument programming/confirmation

- brief pressure = lower than 3 seconds

- long pressure = higher than 3 seconds

 Data view display

4.1 Measured power

4.2 Segments for loads status indication

(connected = fixed on, disconnected = flashing)

 Power supply terminals/inputs

Terminals 6-8: voltage input/instrument power supply

Terminals 8-9: current input (direct until 32A)

 Relays terminals for loads connection

Electronic instrument to measure the consumption of active power in single-

phase systems to prevent the activation of the limiter switch of general

current for overload. For this reason, if the total absorbed power is higher than

the programmed activation threshold (setpoint), the PC3R provides for the

disconnection of one or more not priority loads.

It’s possible to control until 3 loads (or loads groups) through the command of

as many relays, to whom is assigned a priority which sets the order with whom

the loads are disconnected.

Code Model Description

VE467700 PC3R Loads control 3 relays

SAFETY WARNINGS

During the installation and the operation of the instrument it’s necessary to

observe the following instructions:

1) The instrument must be installed by a qualified person by observing

scrupulously the connection diagrams.

2) The instrument must be installed and activated in compliance with current

electric systems standards.

3) After installation, inaccessibility to the connection terminals without appropriate

tools must be guaranteed.

4) Do not use the instrument for other purposes different from the one specified.

5) The instrument must be installed in a closed electrical panel adequately

protected.

6) In the power supply network a bipolar disconnection must be present.

7) A protection device against over-currents should be installed in the electrical

system, upstream of the device.

8) Before accessing the connection terminals, verify that the leads are not live.

9) Do not power on or connect the instrument if any part of it is damaged.

10) In case of malfunction do not perform repairs and contact immediately the

technical support.

11) The instrument can be used in environments with category of measurement III

and pollution degree 2, as per standards CEI EN 61010-1.

TECHNICAL CHARACTERISTICS

• Power supply: 230Vac (-15% ÷ +10%) 50/60 Hz

• Maximum own consumption: 8 VA

• Voltage input consumption: < 2,5VA

• Current input consumption: < 2,5VA

• Measurement precision: 2% full scale

• Direct current connection until 32A through shunt

• Maximum overload with maintenance of measurement accuracy: 40A

• Settable setpoint range: 1 ÷ 10 kW

• Settable hysteresis range: 0 ÷ 1 kW

• Output: 3 monostable relays with exchange contact 16A / 250Vac

• Blocks for cables with maximum section of 6 mm

• Operating temperature: -10°C ÷ +45°C

• Operating humidity: 10% ÷ 90% non condensing

• Storage temperature: -10°C ÷ +65°C

• Container: 4 modules din

• Protection degree: IP20 / IP51 (on the front panel)

• Insulation:

reinforced between accessible parts (front panel) and all other terminals

• Type of actions: 1B

To prevent the disconnection of all loads downstream of the general counter, the

loads control PC3R must measure the same current of the energy meter.

For this reason the ideal position for the connection of the instrument is immediately

downstream of the general switch.

Four loads or groups of loads must be located and so divided:

• Not disconnectable loads, that is to say loads which can’t be disconnected and

that can’t be controlled by PC3R (even if their consumption must be measured by

PC3R to determine the total consumption)

• Loads with high priority (priority 1), which can be disconnected only as a last

hypothesis to limit the power absorbed

• Loads with medium priority (priority 2)

• Loads with low priority (priority 3), which can be disconnected without

special problems and they will be disconnected for first if the absorbed power is

higher than the prefixed threshold.

Note: PC3R can be used also as a generic controller of absorbed power by loads

under control by placing it upstream of the cable for power supply of loads

themselves.

Clearly with this second application it’s not possible to prevent the

disconnection of the general energy meter, because the absorptions of the

loads not controlled by PC3R are not counted.

OPERATION

The PC3R switches on with the disconnected loads; every DelayOn seconds one load

is connected (if the absorption conditions allow this).

During the normal operation the instrument shows the

measured power (expressed with two decimals) and relays

status (segment on fixed if connected load, flashing segment

if disconnected load).

The programmed setpoint can be showed for three seconds

by pressing the key .

Configuration relays (normally open

or normally closed) can be showed by

pressing the key and then the relays

priority. Each display is visible for 3

seconds.

The device reset can be performed by pressing simultaneously the keys and :

the loads are disconnected and then reconnected according to the set priority.

OPERATION LOGIC (T control≠0)

Attention: only a qualified person can modify this value!

With different from zero, for each connection or disconnection of T control

one load the PC3R calculates the consumption of the load itself, measuring the

difference between the absorbed power before and after.

This calculated consumption is valid for all next minutes, where the T control

PC3R connects the load if the following condition is verified:

Total absorbed power < Setpoint – hysteresis – C

where C is the consumption of the load in questionPX

Note: If there are more disconnected loads it’s possible that the less priority load

verifies the connection condition before the most priority load. In this case

the less priority load is connected while another load with higher priority is

disconnected.

This condition that contrasts with the priorities assigned to the single

outputs ends in the following cases:

- if before the expiration the absorbed power is such to allow T control

the connection of the most priority load (eventually by disconnecting the

one less priority)

- if the time is expired. In this case for PC3R the estimated T control

consumptions are no longer true and it proceeds by disconnecting all

the loads and by connecting them one at a time according to the priority

(each seconds)Delay On

- if a reset is performed by pressing simultaneously the keys and .

In this case the loads are disconnected and then reconnected according

to the priority.

After minutes on the contrary, for PC3R the consumption of the load T control

Cpx is no longer reliable and so the condition to connect the load becomes:

Total absorbed power < Setpoint – hysteresis

which is the same we would have with .T control=0

In practice, if is different from 0, the insertion sequence doesn’t T control

respect necessarily the set priority but it will be such to maximise the number of

connected loads.

DEFINITION AND MODIFICATION OF OPERATION PARAMETERS

• [kW] represents the activation threshold that is to say the maximum value of accepted consumption before the instrument provides for the disconnection of the Setpoint

loads according to the priority.

• (or differential) [kW] represents the value to subtract from the setpoint to calculate the value under whom there is the insertion zone (that is to say the zone Hysteresis

where it’s possible to connect the loads eventually disconnected).

For example, if the setpoint = 3 Kw and differential = 0.5 kW the loads eventually disconnected can be connected if the value of measured absorbed power is lower than 2.5 kW.

• [seconds] represents the minimum time that must elapse from the last connection (or disconnection) of one load before connecting another one. Delay On

• Delay Off

[seconds] represents the delay of disconnection, that is to say how long the absorbed power must result higher than the setpoint before the instrument disconnects one load.

• [minutes] represents how long the consumption of active power estimated for each load can be considered valid. For details see the box 5.1 T control