FAQ2020-12-16T17:40:09+01:00

FAQ

How to upgrade the software running on EXCGLA01?2021-01-05T16:48:29+01:00

In case of new software releases of the applications loaded in EXCGLA01, the upgrade files should be downloaded from www.lovatoelectric.com in the product page. Run the following steps in sequence.

  1. Unzip the archive file and verify the presence of the following folder:
    a. “updateV1.0_V2.1” folder.
    2) Copy “src” and “Lovato” folders and 2 files in “updateV1.0_V2.1” folder to an empty USB memory; Attention: copy the “src” and “Lovato” folders and files only without “updateV1.0_V2.1” folder.
    3) Insert the memory into the USB port of EXCGLA01; EXCGLA01 generates some different acoustic signals (beeps), until three consecutive beeps (end of upgrade); the update process can take up to 15 minutes. Remove the USB memory and switch EXCGLA01 OFF and ON.
    4) Restart the browser on the PC; if the new application version is not shown (see below) at the bottom side of the page, press CTRL+F5 key combination to refresh the cache.

EXCGLA01 is ready with the new software version.

On USB memory a copy of the previous version is saved in “backup” folder, making it possible to restore EXCGLA01 at the point just before the upgrade operation.

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Other information on this topic

Take a look to the Gateway data logger and to the energy management brochures.

Make sure to visit em.lovatoelectric.com 

Watch our video tutorials

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Is the connection to a remote server mandatory to work with EXCGLA01?2021-01-05T16:16:17+01:00

When the connection to a remote server is not possible or not required, EXCGLA01 offers the built-in web interface by which all data can be downloaded to
Excel or CSV files.

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Other information on this topic

Take a look to the Gateway data logger and to the energy management brochures.

Make sure to visit em.lovatoelectric.com 

Watch our video tutorials

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Which points should be checked if the data is collected by EXCGLA01, but not sent to Synergy Cloud?2021-01-05T16:13:22+01:00

It is necessary to verify if EXCGLA01 can reach the remote server. Check the set URL and run the dedicated test in “Administration area” section in EXCGLA01.

Furthermore, an account for a Synergy Cloud user must exist, being registered by the dedicated portal https://cloud.lovatoelectric.com the same credentials should be entered in EXCGLA01 as well in the relevant section “Administration area”/”Remote server”.

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Other information on this topic

Take a look to the Gateway data logger and to the energy management brochures.

Make sure to visit em.lovatoelectric.com 

Watch our video tutorials

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Which is the URL to be set in the EXCGLA01 settings to connect it to Synergy Cloud server?2021-01-05T16:16:25+01:00
How many devices can be connected to EXCGLA01?2021-01-05T15:39:36+01:00

The devices can be freely distributed between the RS485 and the ethernet port until the max number of 31 devices.

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Other information on this topic

Take a look to the Gateway data logger and to the energy management brochures.

Make sure to visit em.lovatoelectric.com 

Watch our video tutorials

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Which are the pre-requisites to be considered to take the most of EXCGLA01?2021-01-05T15:48:23+01:00
  • The devices to be monitored must be equipped with RS485 or ethernet ports;
  • EXCGLA01 must be connected to the local network (LAN), possibly by a static IP address or a dynamic IP assigned by a DHCP server where EXCGLA01 MAC address is coupled to a known IP;
  • The IP address assigned to EXCGLA01 must be enabled to browse the internet if data transfer to remote servers is desired.

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Other information on this topic

Please, visit the Gateway data logger dedicated page.

Take a look to the Gateway data logger and to the energy management brochures.

Make sure to visit em.lovatoelectric.com 

Watch our video tutorials

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Is it possible via Modbus to send start / stop commands to an ADXL… series soft starter? Is it also possible to configure it via Modbus as well as control it?2021-01-04T16:25:20+01:00

Yes, all the parameters accessible from the display are also accessible via Modbus.

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Other information on this topic

Visit the website page dedicated to ADXL… series soft starters.

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In which applications are the undervoltage trip releases with early make contacts used?2021-01-04T14:53:55+01:00

This type of undervoltage trip release has the purpose of removing voltage from the coil of the release itself when the motor protection circuit breaker is in OFF position. Otherwise the coil would remain permanently powered even if with the machine is stopped. Turning off the power supply to the undervoltage trip release reduces unnecessary energy consumption and consequent heating, moreover, in some applications, it allows the power to be removed from
the auxiliary circuit connected in series to the undervoltage trip release (for example emergency buttons or limit switches).

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Other information on this topic

Visit the website page dedicated to Undervoltage trip releases.

Visit the website page dedicated to Motor protection circuit breakers.

Check out our video

Check out our video tutorials

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Which is the motor protection circuit breaker behaviour in case of phase loss?2021-01-04T11:19:37+01:00

Phase failure is a fault condition that can cause damage to the three-phase motor. The Lovato motor protection circuit breakers, SM series, are sensitive to phase failure and therefore save the motor from damages caused by this condition. It is possible to have two situations: phase failure at motor starting and phase failure when the motor is running. In the first case the motor usually can’t start. Staying locked with only 2 phases, a very high current is reached so the thermal protection of the motor protection circuit breaker will trip in a very short time. In the second case the motor continues to operate, but the phases that remain powered will draw a current that will be around 2 times the motor rated current with consequent overheating and the risk of burning. Furthermore, the motor working with 2 phases only can generate mechanical vibrations and consequent mechanical damage on the machine. In these conditions, the motor protection circuit breakers trip in a few tens of seconds which is an adequate time to avoid damage.

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Other information on this topic

Visit the website page dedicated to Motor protection circuit breakers.

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Are LOVATO Electric HMIs able to communicate only with LOVATO Electric devices?2021-01-04T11:12:33+01:00

No, our HMIs can communicate with all devices that have an RS485 / 232/422 / Ethernet port and support Modbus-RTU Master / Slave, Modbus-TCP Client / Server, SIEMENS S7 Ethernet, MTTQ, or OPC UA Client / Server protocols.

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Other information on this topic

Visit the website page dedicated to HMI.

Check out our video tutorials on HMI:

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How many devices can I connect to an HMI?2021-01-04T11:06:32+01:00

There is no predefined maximum number, theoretically it is unlimited. From a practical point of view, the limit is conditioned by the number of devices allowed by the network in which they are located (eg RS485 network) and by the possible traffic congestion on the network itself.

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Other information on this topic

Visit the website page dedicated to HMI.

Check out our video tutorials on HMI:

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In the technical data of the motor protection circuit breakers, what does “utilization category: A” mean?2021-01-04T11:20:15+01:00

The category of use of a circuit breaker is defined by the product standard IEC/EN60947-2. This standard indicates 2 categories: A and B. Category A includes circuit-breakers without intentional tripping delays in the event of a shortcircuit, while category B includes circuit breaker with intentional tripping delays to guarantee selectivity. The motor protection circuit breakers must be in A category because they are designed to protect a single branch of an installation. Therefore they must not have delays to avoid the intervention of upstream circuit breakers that protect large sections of the system. This reduces the out of service to a single load on the line where the short circuit occurred.

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Other information on this topic

Visit the website page dedicated to Motor protection circuit breakers.

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When choosing a switch disconnector, which current should I consider? Ith or Ie?2021-01-04T10:58:42+01:00

When choosing the switch disconnector, the first thing to consider is the category of use, that is the application to which it’s intended. For example, the table below lists:

AC-21 Switching of resistive loads, including moderate overloads
AC-22 Switching of mixed resistive and inductive loads, including moderate overloads
AC-23 Switching of motor loads or other highly inductive loads

The category of use actually determines which current must be considered.

The conventional thermal current in free air Ith refers to the use of the appliance for continuous use without overheating beyond the limits allowed by the product standard, therefore its value is always greater than or equal to the maximum rated operational current Ie .

The rated operational current Ie, on the other hand, is the current value that the circuit breaker can bring into uninterrupted service based on the category of use.

In the LOVATO Electric offer, in most cases the value of Ie coincides with that of Ith, testifying to the high quality of the components used which ensure, with more demanding tests, such as AC22A and AC23A, performance similar to those in AC21A.

There is also a conventional thermal current in Ithe casing which is established by the manufacturer in relation to a specific enclosure where the device must be maintained. This is the case, for example, of switch disconnectors in metal enclosure:

 

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Other information on this topic

Visit the website page dedicated to switch disconnectors.

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What is the shortest sample time for the data logging?2020-12-22T10:08:30+01:00

When the HMI is used as a data logger, the shortest sampling time is 0.1 seconds. It’s 1 second by default .

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Other information on this topic

Visit the website page dedicated to HMI.

Check out our video tutorials on HMI:

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Is it possible to manage the access permissions to the HMI to exclude some users from using certain functions?2020-12-22T10:08:02+01:00

Yes, by default there are already three levels of access that you can view by following the path:
ProjectView> Security> doppio click su UserGroups

These three user groups cannot be deleted or renamed, however you can change the authorizations and other settings.

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Other information on this topic

Visit the website page dedicated to HMI.

Check out our video tutorials on HMI:

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Which are the advantages of the programming via NFC compared to the programming via potentiometers?2020-12-22T08:56:29+01:00

Programming in simple and fast way, ideal solution for the programming of several time relays in series: you can program just one time relay and then copy the same programming on the others TMM1 NFC very quickly.
– Very high accuracy and precision in the time settings on the entire range (short and long scales), thanks to the setting in digital format.
– Repeatability of the settings: the programming downloaded in different TMM1 NFC is exactly the same identical, eliminating the risk of errors.
– Intuitive programming thanks to the graphical interface of the App which shows the diagram of the function that you are programming, without the need of the technical manual.
– Protection of the settings: possibility to protect the parameters configuration with a password, to prevent changes from unauthorized personnel.
– Flexibility: with NFC technology the number of the supported functions is not bound to the number of  positions of the potentiometer but depends to the
dimension of the memory, allowing to obtain a greater number functions.

Here are some useful tutorials that show ho to setup the TMM1NFC timer:

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VIDEO TUTORIAL: How to use the counter function via NFC on the time – TMM1NFC
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VIDEO TUTORIAL: Setting function N “Hour counter” via NFC on the timer – TMM1NFC

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Other information on this topic

Visit the website page dedicated to time relays.

Which models of Lovato Electric time relays with potentiometers can be replaced by TMM1NFC?2020-12-22T08:46:53+01:00

TMM1NFC integrates 40 functions, included those of TMM1 (multifunction, 10 function), TMP (on-delay) and TMPL (flasher with independent timings).
Moreover, the numbering of the terminals of TMM1NFC, which is identical to the traditional versions with potentiometers above-mentioned, makes it perfectly
interchangeable with these models, without the need to modify the wiring diagram.  Here are some useful tutorials that show ho to setup the TMM1NFC timer:

Video
Video
Video
VIDEO TUTORIAL: How to use the counter function via NFC on the time – TMM1NFC
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VIDEO TUTORIAL: Setting function N “Hour counter” via NFC on the timer – TMM1NFC

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Other information on this topic

Visit the website page dedicated to time relays.

Is it possible to use the motor protection circuit breakers to protect single-phase motors?2021-01-04T15:14:46+01:00

Yes, but a simple trick in the wiring must be implemented, that is, have the current pass through the three phases of the motor protection switch. In practice, a phase must pass through two poles of the switches connected in series between them.
Otherwise the motor protection switch will trip off due to thermal intervention. The motor protection switches are in fact sensitive to phase failure. Note that the same practice must also be implemented with thermal relays.

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Other information on this topic

Visit the website page dedicated to Undervoltage trip releases.

Visit the website page dedicated to Motor protection circuit breakers.

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What is the utilization category of a contactor?2020-12-18T12:25:28+01:00

The utilization category specifies the nominal electrical performance of the contactor referred to a specific type of load. In the IEC / EN60947-4-1 standard, for each utilization category, the test conditions to which the contactor must be subjected to verify its operational effectiveness are prescribed. The most common utilisation categories for contactors are:

  • AC-1 Non-inductive or slightly inductive loads (in practice resistance control)
  • AC-3 Motor control

See the complete list at the bottom.

For example, if a manufacturer declares that a contactor has an AC-3 rated current of 9A at 400V means that this contactor can control motors with a
maximum rated current of 9A at 400V. The standard requires a long series of tests to confirm the conformity of the product to the control of such motors.

  • AC-1 Non-inductive or slightly inductive loads; resistance furnaces
  • AC-2 Slip-ring motors: starting, switching off
  • AC-3 Squirrel-cage motors: starting, switching off motors during running
  • AC-4 Squirrel-cage motors: starting, plugging, inching
  • AC-5a Switching of electric discharge lamp controls
  • AC-5b Switching of incandescent lamps
  • AC-6a Switching of transformers
  • AC-6b Switching of capacitor banks
  • AC-8a Hermetic refrigerant compresso motor control with manual resetting of overload releases
  • AC-8b Hermetic refrigerant compressor motor control with automatic resetting of overload releases

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Other information on this topic

Visit the website page dedicated to contactors.

Check out our video tutorials BF series contactors accessories.

How do the performances of a contactor change by connecting the contacts in series or in parallel?2020-12-18T12:21:14+01:00

On the contactors the contacts are connected in series to increase the breaking capacity on DC loads; typically, more the load voltage increases, more contacts in series are needed to achieve an adequate breaking. The poles in parallel increase the current carrying capacity of the contactor. Take in consideration that the poles in parallel do not increase the breaking capacity; this in consequence of the construction tolerances that cause differences, although minimal, in the opening times of the various contacts in parallel. Practically the last contact that opens sustains almost completely the interruption.
The parallel connection of the poles is typically used to increase the rated contact capacity when the load is switched on and off by other devices. For example,
in the control of resistors where the command is given by static devices and the contactor is used just to obtain the galvanic separation of the load.
Consider that the contacts connected in parallel can’t sustain a current value obtained by the rated current of a single contact multiplied per the number of
contacts in parallel. A de-rating must be applied to consider the non-perfect distribution of the current between the contacts in parallel.
We will have to consider for 2 contacts in parallel a multiple of 1.6, for 3 contacts 2.2 and for 4 contacts 2.8.

For example:
If we have a contact with a rated current in AC-1 category of 25A, connecting 3 poles in parallel the rated current is 25×2.2 = 55A.

 

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Other information on this topic

Visit the website page dedicated to contactors.

Check out our video tutorials BF series contactors accessories.

 

What protection is provided by the magnetothermic switch?2021-01-04T11:21:27+01:00

The MCBs, that means Miniature Circuit Breaker, are automatic protections that cut the electric line for which
they are installed in the event of overload or short circuit.

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Other information on this topic

Visit the website page dedicated to Miniature and residual circuit breakers.

Which protection is provided by the RCCB?2020-12-17T17:26:17+01:00

The RCCBs, that means Residual Current Circuit Breaker, are automatic protections that cut the electric line on which they are installed in the event of a ground fault
(current leakage to ground). They are protections against indirect contacts.

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Other information on this topic

Visit the website page dedicated to Miniature and residual circuit breakers.

What is the difference between type AC, type A and type B RCDs?2020-12-17T17:23:26+01:00

AC type RCDs are only sensitive to sinusoidal type fault currents. A type RCDs, on the other hand, are sensitive to both sinusoidal currents and “unidirectional pulsed” currents, which may be present, for example, in systems with electronic devices for rectifying the current. These
devices are capable of generating pulsed‐shape fault currents with continuous components that an AC type RCD is unable to recognize.  B type RCDs, besides being able to protect against sinusoidal and “unidirectional pulsed” fault currents, also protect against DC earth fault currents above 6mA DC. They also protect against high frequency fault currents.

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Other information on this topic

Visit the website page dedicated to Miniature and residual circuit breakers.

What identifies the sensitivity of the differential switch?2020-12-17T17:22:29+01:00

This data, indicated in the manufacturer’s technical tables, indicates the level of current protection offered by the RCDs. The sizes typically used in low voltage electrical distribution are 30mA and 300mA. Typically the 30mA
threshold is dedicated to the protection of people.
To explain the intervention thresholds, take the example of a 30mA RCD: this one will not trip only for leakage currents >30mA but in a threshold between 15mA and 30mA:
‐ for currents lower than 15mA the RCD will surely not trip
‐ in the threshold 15mA ÷ 30mA could trip
‐ for currents> 30mA it will trip instantaneously.
The central threshold (15mA ÷ 30mA) is a threshold with uncertain trip because the RCD, being an electromechanical device, cannot have a certain and fixed trip threshold.

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Other information on this topic

Visit the website page dedicated to Miniature and residual circuit breakers.

Is the thermal tripping characteristic, therefore against overload, always the same for MCBs?2020-12-17T17:18:51+01:00

Yes. The MCB offers protection against overloads for currents in the range 1.13In ÷ 1.45In. Since the overload is typically borne by most equipment, the trip is not
instantaneous.

‐ If there is a current of 1.13In, the switch must not trip before 60 minutes (In≤63A) or 120 minutes (In> 63A).
‐ If there is a current of 1.45In the switch must trip within 60 minutes (In≤63A) or 120 minutes (In> 63A).
In case of higher currents the product standard establishes that the MCB has to trip within 60 seconds for a current equal to 2.55In.

Intervention times may appear long but take into account the need to avoid untimely trips due to overload situations that do not last over time.

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Other information on this topic

Visit the website page dedicated to Miniature and residual circuit breakers.

Why are the MCBs offered with different magnetic trip curves?2020-12-17T17:18:35+01:00

An MCB must protects against short circuits or sudden increases in the current absorbed by a load. The magnetic trip curves exactly define the protection behavior based on the amount of current to be interrupted. There are appliances (loads) that could give rise to untimely trips because when they start they have absorption peaks (eg. electric motors). In other cases the load could be very sensitive and not withstand even minimal current increases. To meet the various cases, the MCBs are
offered with different magnetic trip curves:

C curve: trip in the range 5In ÷ 10In
B curve: trip in the range 3In ÷ 5In
D curve: trip in the range 10In ÷ 14In

C curve MCBs are the most used in installations without particular loads, those of B curve are suitable for the
protection of circuits with low inrush currents and for the protection of cables with considerable length. Finally, D
curve is used to protect loads with high insertion currents (motors, transformers, etc.).
Hereunder there is an example of an MCB curve with magnetic C curve:

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Other information on this topic

Visit the website page dedicated to Miniature and residual circuit breakers.

What is the limit ambient temperature for the correct operation of the contactors?2020-12-17T08:12:25+01:00

The standard IEC / EN60947-4-1, referred to the contactor, of the contactors, prescribes that the operation of the contactors have to be within the temperature range of -5… + 40 ° C. In this temperature range the devices must guarantee correct operation with their maximum rated load. It is quite common for contactors to work over these temperature limits; this in consequence of the installation in extreme geographical environments or due to particular working conditions of the machine on which they are mounted. Lovato contactors can operate in the presence of  higher or lower temperature in confront to the ones prescribed in the standard, in some cases a de-rating is necessary. Here below are some general indications about the behaviour of contactors in extreme temperatures ambient; we recommend that you contact our technical support for any clarifications for specific uses. Generally speaking, low temperatures do not cause electrical problems. The only case to take in consideration is the embrittlement of plastic materials; so shocks or wiring operations must be avoided when the equipment is in a very low temperature condition. Low temperatures do not cause deterioration of plastics or other components. Attention should only be paid to the use of electronically controlled
contactors in which some components may deteriorate if exposed to a lower temperature than the one indicated in the catalogue. High ambient temperatures are notoriously a problem because they are added to the normal heating generated by the contactor operation. Long periods of exposure to very high temperatures can lead to the permanent loss of mechanical properties due to thermal aging of the plastics. High temperatures influence the coil which can have an increase in the
resistance value, caused by the intrinsic property of the copper, which reduces the working performances. The terminals have a temperature increase due to the
passage of the current which, added to the ambient temperature, in extreme cases can lead to permanent deterioration of the properties of the plastics. In
general, in the presence of extremely high temperatures, these countermeasures can be considered: panel ventilation, contactor spacing to
avoid mutual heating and to facilitate heat dissipation and oversizing the contactors.

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Other information on this topic

Visit the website page dedicated to contactors.

Check out our video tutorials BF series contactors accessories.