CIRCUTOR MDC-4 User Manual

Maximum demand control

MDC-4

INSTRUCTION MANUAL

(M013B01-03-15C)

MDC-4

Instruction Manual

MDC-4

SAFETY PRECAUTIONS

Follow the warnings described in this manual with the symbols shown below.

DANGER

Warns of a risk, which could result in personal injury or material damage.

ATTENTION

Indicates that special attention should be paid to a speci c point.

If you must handle the unit for its installation, start-up or maintenance, the following should be taken into consideration:

Incorrect handling or installation of the unit may result in injury to personnel as well as damage to the unit. In particular, handling with voltages applied may result in electric shock, which may cause death or serious injury to personnel. Defective installation or maintenance may also lead to the risk of  re. Read the manual carefully prior to connecting the unit. Follow all installation and maintenance instructions throughout the unit’s working life. Pay special attention to the installation standards of the National Electrical Code.

Refer to the instruction manual before using the unit

In this manual, if the instructions marked with this symbol are not respected or carried out correctly, it can result in injury or damage to the unit and /or installations.

CIRCUTOR, SA reserves the right to modify features or the product manual without prior noti cation.

DISCLAIMER

CIRCUTOR, SA reserves the right to make modi cations to the device or the unit speci ca-

tions set out in this instruction manual without prior notice.

CIRCUTOR, SA on its web site, supplies its customers with the latest versions of the device speci cations and the most updated manuals.

www.circutor.com

Instruction Manual

MDC-4

SAFETY PRECAUTIONS ��3 DISCLAIMER ��3 CONTENTS �� 4 REVISION LOG ��5 1�- VERIFICATION UPON RECEPTION �� 6 2�- PRODUCT DESCRIPTION �� 6 3�- UNIT INSTALLATION �� 7

3�1�- PRIOR RECOMMENDATIONS��7 3�2�- INSTALLATION ��8 3�3�- UNIT TERMINALS �� 9 3�4�- CONNECTION DIAGRAM �� 10

3�4�1�- Three-phase network measurement with a 4-wire connection� �� 10 3�4�2�- Three-phase network measurement with a 3-wire connection� �� 11 3�4�3�- Single-phase network measurement� ��12

4�- OPERATION ��13

4�1�- OPERATING PRINCIPLE �� 13 4�2�- PARAMETERS ��14 4�3�- KEYS FUNCTIONS ��15 4�4�- DISPLAY ��15 4�5�- LED INDICATORS �� 16 4�6�- DISPLAY IMPROVEMENTS ��17

4�6�1�- Maximum demand screens� ��17

4�6�2�- Measuring screens� ��18 4�7�- OUTPUT RELAYS ��19 4�8�- PROGRAMMING �� 19

4�8�1� Current primary ��19

4�8�2� Selecting the maximum demand variable �� 20

4�8�3� Period of maximum demand integration ��20

4�8�4� Contracted power �� 20

4�8�5� Deleting the maximum demand maximum value� �� 20

4�8�6� Deleting the energy value �� 21

4�8�7� Deleting the output relay disconnection times� ��21

4�8�8� Level of output relay no� 1 �� 21

4�8�9� Hysteresis of output relay no� 1 �� 21

4�8�10� Delay in connecting output relay no� 1 ��22

4�8�11� Delay in disconnecting output relay no� 1 ��22

4�8�12� Status of the contacts for output relay no� 1 �� 22 4�9�- PROGRAMMING THE CURRENT DATE AND TIME ��23

4�9�1� Day �� 23

4�9�2� Month ��23

4�9�3� Year �� 24

4�9�4� Time �� 24

4�9�5� Minutes �� 24

5�- TECHNICAL FEATURES ��25 6�- MAINTENANCE AND TECHNICAL SERVICE ��27 7�- GUARANTEE ��27 8�- CE CERTIFICATE �� 28

Instruction Manual

MDC-4

REVISION LOG

Table 1: Revision log�

Date Revision Description

09/14 M013B01-03-14A Initial Version

03/15 M013B01-03-15A

04/15 M013B01-03-15B

06/15 M013B01-03-15C

Changes in the following sections:

3.4. - 4.1. - 4.8.7.

Changes in the following sections:

4.2.- 4.6.1.- 4.6.2 - 4.8

Changes in the following sections:

4.8 - 5

Note: Unit images are for illustrative purposes only and may differ from the actual unit.

Instruction Manual

MDC-4

1�- VERIFICATION UPON RECEPTION

Check the following points upon receiving the unit:

a) The unit meets the specications described in your order. b) The unit has not suffered any damage during transport. c) Perform an external visual inspection of the unit prior to switching it on. d) Check that it has been delivered with the following:

- An installation guide.

If any problem is noticed upon reception, immediately contact the transport company and/or CIRCUTOR's after-sales service.

2�- PRODUCT DESCRIPTION

The MDC-4 unit controls maximum power demand, both in single and three-phase installations with and without neutral. The unit is equipped with a power analyzer that measures electrical parameters at the connection point. The measurement is taken in RMS, via four AC voltage inputs and four current inputs. The current is measured indirectly with efcient transformers of the MC1 and MC3 series.

The unit features:

- 4 output relays, to disconnect and connect the loads.

- 4 keys, to browse through the different screens.

- 5 indicator LEDs, to show the status of the loads and the CPU.

- 1 Display, for viewing all the parameters.

Instruction Manual

MDC-4

3�- UNIT INSTALLATION

3.1.- PRIOR RECOMMENDATIONS

In order to use the unit safely, it is critical that individuals who handle it follow the safety measures set out in the standards of the country where it is being used, use the necessary personal protective equipment, and pay attention to the various warnings indicated in this instruction manual.

The MDC-4 unit must be installed by authorised and qualied staff.

The power supply plug must be disconnected and measuring systems switched off before handling, altering the connections or replacing the unit. It is dangerous to handle the unit while it is powered.

Also, it is critical to keep the cables in perfect condition in order to avoid accidents, personal injury and damage to installations.

The manufacturer of the unit is not responsible for any damage resulting from failure by the user or installer to observe the warnings and/or recommendations set out in this manual, nor for damage resulting from the use of non-original products or accessories or those made by other manufacturers.

If an anomaly or malfunction is detected in the unit, do not use it to take any measurements.

Inspect the work area before taking any measurements. Do not take measurements in dangerous areas or where there is a risk of explosion.

Disconnect the unit from the power supply (unit and measuring system power supply) before maintaining, repairing or handling the unit's connections. Please contact the after-sales service if you suspect that there is an operational fault in the unit.

Instruction Manual

MDC-4

3.2.- INSTALLATION

The unit is installed on a DIN rail.

The unit must be mounted inside an electric panel.

The unit must be connected to a power circuit that is protected with gL fuses (IEC 269) or M fuses, with a rating of 1 to 2 A. It must be tted with a circuit breaker or equivalent device for disconnecting the unit from the power supply mains.

The power and voltage measuring circuit must be connected with cables that have a minimum cross-section of 1mm2.

Terminals, opening covers or removing elements can expose parts that are hazardous to the touch while the unit is powered. Do not use the unit until it is fully installed.

Instruction Manual

MDC-4

3.3.- UNIT TERMINALS

1: VL1, Voltage input L1 13, 14: Relay output 2

3: VL2, Voltage input L2 15, 16: Relay output 1

5: VL3, Voltage input L3 17: Auxiliary Power Supply

6: N, Voltage input neutral 18: Auxiliary Power Supply

8: Relay output 4, NC 21: COM, Common current inputs

9: Relay output 4, C 22: S1, Current input L3

10: Relay output 4, NO 23: S1, Current input L2

11, 12: Relay output 3 24: S1, Current input L1

Table 2:List of MDC-4 terminals

Unit terminals

24 2123 22

3 5 6 9

Figure 1:MDC-4 terminals�

10 11

13 14

CPU

OUT 4

MDC-4

OUT 3

OUT 2

OUT 1

15 16

Instruction Manual

+ 21 hidden pages